ARMY TM 9-2320-365-20-1
AIR FORCE T.O. 36A12-1B-1095-2-1

TECHNICAL MANUAL
MAINTENANCE INSTRUCTIONS
UNIT MAINTENANCE
M1078 SERIES, 2 1/2-TON, 4 X 4,
LIGHT MEDIUM TACTICAL VEHICLES (LMTV)
VOLUME NO. 1 OF 5

HOW TO USE THIS MANUAL
PAGE vii
MODEL
NSN
EIC

TRK, CAR., LMTV, M1078
GENERAL INFORMATION
PAGE 1-1
W/WN
2320-01-360-1898
BHH
W/O WN
2320-01-354-3385
BHD

TRK, VAN, LMTV, M1079
EQUIPMENT DESCRIPTION AND
DATA
PAGE 1-6

W/WN
2320-01-360-1891
BHG
W/O WN
2320-01-354-3384
BHE

TRK, CHAS, LMTV, M1080
2320-01-353-9098
BHC

SERVICE UPON RECEIPT
PAGE 2-3
TRK, CAR., LMTV, AIR DROP, M1081
W/WN
2320-01-360-1899
BHJ
W/O WN
2320-01-355-3064
BHF

PREVENTIVE MAINTENANCE
CHECKS AND SERVICES (PMCS)
INTRODUCTION PAGE 2-6.1

INTRODUCTION TO LOGIC TREE
TROUBLESHOOTING
PAGE 2-53

FUEL SYSTEM TROUBLESHOOTING
PAGE 2-101

ELECTRICAL SYSTEM
TROUBLESHOOTING
PAGE 2-147

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

HEADQUARTERS, DEPARTMENTS OF THE ARMY AND THE AIR FORCE

JUNE 1998

ENGINE SYSTEM
TROUBLESHOOTING
PAGE 2-63

TM 9-2320-365-20-1

WARNING SUMMARY

WARNING

EXHAUST GASES CAN KILL

1.
DO NOT operate your vehicle engine in an enclosed area.

2.
DO NOT idle vehicle engine with cab windows closed.

3.
DO NOT drive vehicle with inspection plates or covers removed.

4.
BE ALERT at all times for exhaust odors.

5.
BE ALERT for exhaust poisoning symptoms, they are:

Headache

Dizziness

Sleepiness

Loss of Muscular Control

6.
IF YOU SEE another person with exhaust poisoning symptoms:

Remove person from area.

Expose to open air.

Keep person warm.

Do not permit person to move.

Administer cardiopulmonary resuscitation, if
necessary.*

* For cardiopulmonary resuscitation, refer to FM 21-11.

WARNING

Remove rings, bracelets, watches, necklaces, and any other jewelry before
working around vehicle. Jewelry can catch on equipment and cause injury
or short across electrical circuit and cause severe burns or electrical
shock. Batteries can explode from a spark. Battery acid is harmful to skin
and eyes. Always wear eye protection and rubber gloves when working
with batteries.

WARNING

Battery acid (electrolyte) is extremely harmful. Always wear safety goggles
and rubber gloves, and do not smoke when performing maintenance on
batteries. Injury will result if acid contacts skin or eyes. Wear rubber apron
to prevent clothing being damaged.

a

TM 9-2320-365-20-1

WARNING SUMMARY (CONT)

WARNING

Adhesives, solvents, and sealing compounds can burn easily, can give off
harmful vapors, and are harmful to skin and clothing. To avoid injury or
death, keep away from open fire and use in a well-ventilated area.
If
adhesive, solvent, or sealing compound gets on skin or clothing, wash
immediately with soap and water. Failure to comply may result in injury
to personnel.

WARNING

•
Dry Cleaning Solvent (P-D-680) is TOXIC and flammable.
Wear protective
goggles and gloves; use only in well ventilated area; avoid contact with skin,
eyes, and clothes, and do not breathe vapors. Keep away from heat or flame.
Never smoke when using solvent; the flashpoint for Type I Dry Cleaning
Solvent is 100 degrees F (38 degrees C) and for Type II is 130 degrees F (50
degrees C).
Failure to comply may result in serious injury or death to
personnel.

•
If personnel become dizzy while using Dry Cleaning Solvent, immediately get
fresh air and medical help. If Dry Cleaning Solvent contacts skin or clothes,
flush with cold water.
If Dry Cleaning Solvent contacts eyes, immediately
flush eyes with water and get immediate medical attention. Failure to comply
may result in injury to personnel.

WARNING

Diesel fuel is flammable. If fuel is spilled, clean it up immediately. Failure
to comply may result in serious injury or death to personnel.

WARNING

After Nuclear, Biological, or Chemical (NBC) exposure of vehicle, all air
filters shall be handled with extreme caution. Unprotected personnel may
experience serious injury or death if residual toxic agents or radioactive
material are present.
If vehicle is exposed to chemical or biological
agents, servicing personnel shall wear protective mask, hood, protective
overgarments, and chemical protective gloves and boots in accordance
with FM-3-4. All contaminated air filters shall be placed in double-lined
plastic bags and moved swiftly to a segregation area away from the
worksite. The same procedure applies for radioactive dust contamination.
The Company NBC team should measure radiation prior to filter removal
to determine extent of safety procedures required per the NBC Annex to
the unit Standard Operating Procedures (SOP). The segregation area in
which the contaminated air filters are temporarily stored shall be marked
with appropriate NBC placards. Final disposal of contaminated air filters
shall be in accordance with local SOP. Decontamination operation shall
be in accordance with FM-3-5 and local SOP. Failure to comply may result
in serious injury or death to personnel.

b

TM 9-2320-365-20-1

WARNING

Diesel fuel is flammable. Do not fill fuel tank with engine running, while
smoking, or when near an open flame. Never overfill the tank or spill fuel.
If fuel is spilled, clean it up immediately. Failure to comply may result in
serious injury or death to personnel.

WARNING

Adhesive sealant MIL-S-46163 can damage your eyes.
Wear safety
goggles/glasses when using; avoid contact with eyes. If sealant contacts
eyes, flush eyes with water and get immediate medical attention. Failure
to comply may result in injury to personnel.

WARNING

Use care when removing/installing springs. Springs are under tension and
can act as projectiles when being removed. Failure to comply can cause
injury to personnel.

WARNING

Retaining rings are under tension and can act as projectiles when released
causing severe eye injury. Use care when removing retaining rings.
Failure to comply may result in injury to personnel.

WARNING

Ensure exhaust system is cool before performing maintenance. Failure
to comply may result in injury to personnel.

WARNING

Wear appropriate eye protection when working under vehicle due to the
possibility of falling debris.
Failure to comply may result in injury to
personnel.

WARNING

Do not operate LMTV vehicle with muffler removed. Toxic exhaust fumes
may enter cab, resulting in serious injury or death to personnel.

WARNING

Do not work on fuel system when engine is hot; fuel can be ignited by a
hot engine.

c

TM 9-2320-365-20-1

WARNING SUMMARY (CONT)

WARNING

Post signs that read "NO SMOKING WITHIN 50 FEET" when working with
open fuel, fuel lines or fuel tanks. Failure to comply may result in injury
to personnel or damage to equipment.

WARNING

Exhaust pipe, transmission oil lines, and transmission scavenge pump
hose may be hot to the touch.
Extreme care should be taken when
checking exhaust pipe, transmission oil lines, and transmission scavenge
pump hose for leaks. Failure to comply may result in injury to personnel.

WARNING

Compressed air used for cleaning purposes will not exceed 30 psi (207
Kpa).
Use only with effective chip guarding and personal protective
equipment (goggles/shield, gloves, etc). Failure to comply may result in
injury to personnel.

WARNING

Wheel drum weighs approximately 90 lb (41 Kg).
Use the aid of an
assistant to help remove wheel drum.
Failure to comply may result in
injury to personnel.

WARNING

Wheel drum weighs approximately 90 lb (41 kg).
Use the aid of an
assistant to help install wheel drum. Failure to comply may result in injury
to personnel.

WARNING

Brake shoes may be covered with dust.
Breathing this dust may be
harmful to your health. Do not used compressed air to clean brake shoes.
Wear a filter mask approved for use against brake dust. Failure to comply
may result in injury to personnel.

WARNING

Cage spring brake before air chamber is removed or severe injury to
personnel will occur.

d

TM 9-2320-365-20-1

WARNING

Ensure air chamber is caged prior to installation. Failure to comply may
result in injury to personnel.

WARNING

Ensure that tire is totally deflated before removing self-locking nuts.
Failure to comply may result in serious injury or death to personnel.

WARNING

Spring brakes must be caged before attempting replacement of a rear axle
wheel stud. Failure to comply may result in severe injury to personnel.

WARNING

Wear protective goggles to protect against possible injury from release of
high pressure air. Failure to comply may result in injury to personnel.

WARNING

Prolonged contact with lubricating oil (MIL-L-2104) may cause a skin rash.
Skin and clothing that come in contact with lubricating oil should be
thoroughly washed immediately. Saturated clothing should be removed
immediately.
Areas in which lubricating oil is used should be well
ventilated to keep fumes to a minimum. Failure to comply may result in
injury to personnel.

WARNING

Hydraulic fluid (MIL-H-5606) is TOXIC.
Wear protective goggles and
gloves; use only in well ventilated area; avoid contact with skin, eyes, and
clothes. Skin and clothing that come in contact with hydraulic oil should
be
washed
immediately.
Saturated
clothing
should
be
removed
immediately. Failure to comply may result in injury to personnel.

WARNING

Wire rope can become frayed or contain broken wires.
Wear heavy
leather-palmed gloves when handling wire rope. Frayed or broken wires
can injure hands. Failure to comply may result in injury to personnel.

WARNING

Never let moving wire rope slide through hands, even when wearing
gloves. A broken wire could cut through gloves and cut hands.

e

TM 9-2320-365-20-1

f Change 2

WARNING SUMMARY (CONT)

Wear appropriate eye protection when removing rivets. Failure to
comply may result in injury to personnel.

Wear appropriate eye protection when drilling holes. Failure to comply
may result in injury to personnel.

Wear leather gloves at all times when handling winch cable. Do not
allow cable to slide through hands even with gloves on. Broken wires
may cause injury to personnel.

Use extreme caution when working around moving cable. Failure to do
so may result in serious injury to personnel.

Caution must be exercised while cab is raised. Ensure that locking
mechanism is functioning properly before proceeding. Failure to comply
may result in death or serious injury to personnel and damage to
equipment.

Coolant may be very hot and under pressure from engine operation.
Ensure engine is cool before performing maintenance. Failure to comply
may result in injury to personnel.

Do not remove oil filter while engine is hot. Failure to comply may result
in injury to personnel.

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

TM 9-2320-365-20-1

WARNING

Sling spreader weighs approximately 200 lbs (91 kgs). Attach a suitable lifting
device prior to removal. Failure to comply may result in injury to personnel or
damage to equipment.

WARNING

Remove all loose equipment from van body. Failure to comply may result in
injury to personnel or damage to equipment.

WARNING

Van body weighs approximately 3,360 lbs (1525 kgs) empty. Attach a suitable
lifting device prior to removal. Failure to comply may result in serious injury or
death to personnel.

WARNING

Guide ropes must be attached at opposite corners of van body to aid in
controlling van body during removal. Failure to comply may result in serious
injury or death to personnel.

WARNING

Center of gravity will change depending on equipment installed in van body.
Attach and adjust lifting device so that van body lifts level. Failure to comply
may result in serious injury or death to personnel or damage to equipment.

WARNING

Pod frame weighs approximately 80 lbs (36 kgs). Attach a suitable lifting device
prior to removal. Failure to comply may result in injury to personnel or damage
to equipment.

WARNING

Do not install pod frame on van body for 72 hours after installing blind rivet nuts
and spacers. Failure to comply may result in injury to personnel and/or damage
to equipment.

WARNING

Goggles and gloves must be worn when working with glass. Failure to comply
may result in injury to personnel.

g

TM 9-2320-365-20-1

h Change 2

WARNING SUMMARY (CONT)

RH door assembly weighs approximately 85 lbs (39 kgs). Attach a suitable
lifting device prior to removal. Failure to comply may result in injury to
personnel or damage to equipment.

LH door assembly weighs approximately 85 lbs (39 kgs). Attach a suitable
lifting device prior to removal. Failure to comply may result in injury to
personnel or damage to equipment.

Wear appropriate eye protection when handling fluorescent lamps. Failure
to comply may result in injury to personnel.

Heavy objects/loads, such as tool boxes and heavy parts, must always be
carried on the floor with the weight distributed as equally as possible
between left and right sides of M1079 van. Failure to comply decreases the
stability of the M1079 van and will increase the likelihood of a rollover.

Heavy cabinets must always be mounted as low as possible with the weight
distributed as equally as possible between left and right sides of M1079 van.
Remember to consider the weight of the items that will be stored in the
cabinets. Failure to comply decreases the stability of the M1079 van and
will increase the likelihood of a rollover.

Always keep in mind, when placing items inside the M1079 van, that heavier
items must always be positioned as low as possible and the weight
distributed as equally as possible between left and right sides of M1079 van.
Failure to comply decreases the stability of the M1079 van and will increase
the likelihood of a rollover.

Extreme care must be taken when lowering gravel deflector. Coolant hoses
could be pulled loose. Failure to comply could result in serious eye injury.

WARNING

WARNING

WARNING

WARNING

WARNING

TM 9-2320-365-20-1

WARNING

•
Do not open coolant fill cap if temperature reads above 110°F (43°C). Steam or
hot coolant is under pressure.
Failure to comply may result in injury to
personnel.

•
Pressure in reservoir tank must be released before removing cap.
Failure to
comply may result in injury to personnel.

WARNING

Heater weighs approximately 120 lbs (54 kgs). Use the aid of an assistant when
lifting. Failure to comply may result in injury to personnel.

WARNING

200 amp alternator weighs approximately 70 lbs (32 kgs).
The aid of an
assistant is required to install 200 amp alternator. Failure to comply may result
in injury to personnel.

WARNING

Light Material Handling Crane (LMHC) mast weighs approximately 110 lbs (50
kgs). Attach a suitable lifting device prior to installation. Failure to comply may
result in injury to personnel or damage to equipment.

WARNING

Light Material Handling Crane (LMHC) boom assembly weighs approximately 150
lbs (68 kgs). Use an assistant when removing LMHC boom assembly. Failure
to comply may result in injury to personnel.

Change 1
i

TM 9-2320-365-20-1

WARNING SUMMARY (CONT)

WARNING

Light Material Handling Crane (LMHC) boom weighs approximately 60 lbs (27
kgs). Attach a suitable lifting device prior to removal. Failure to comply may
result in injury to personnel or damage to equipment.

WARNING

Light Material Handling Crane (LMHC) weighs approximately 250 lbs (114 kgs).
Attach a suitable lifting device prior to removal. Failure to comply may result
in injury to personnel.

WARNING

Use care when removing/installing springs. Springs are under tension and can
act as projectiles when released.
Failure to comply may result in injury to
personnel.

WARNING

Air conditioner weighs approximately 300 lbs (136 kg). Attach a suitable lifting
device prior to installation. Failure to comply may result in injury to personnel.

WARNING

Ensure cargo bed is free of equipment and debris, and is not warped or
damaged in any way. Failure to comply may result in serious injury or death to
personnel or damage to equipment.

WARNING

S-280 shelter weighs approximately 1500 lbs (680 kgs) empty. Attach a suitable
lifting device prior to installation. Failure to comply may result in serious injury
or death to personnel or damage to equipment.

j

ARMY TM 9-2320-365-20-1
AIR FORCE T.O. 36A12-1B-1095-2-1

Place this change sheet in the front of the publication for reference purposes.
1 of 1

CHANGE
HEADQUARTERS
NO. 3
DEPARTMENTS OF THE ARMY
AND THE AIR FORCE
Washington, D.C., 10 February 2006
TECHNICAL MANUAL
MAINTENANCE INSTRUCTIONS
UNIT MAINTENANCE
M1078 SERIES, 2 1/2-TON, 4x4,
LIGHT MEDIUM TACTICAL VEHICLE
(LMTV)
VOLUME NO. 1 OF 5
TM 9-2320-365-20-1, 17 June 1998, is changed as follows:
1. Remove old pages and insert new pages as indicated below.
2. New or changed material is indicated by a vertical bar in the out margin of the page.
3. Added or revised illustrations are indicated by a vertical bar adjacent to the illustration.
Remove Pages
Insert Pages
None
Change 3 Transmittal/ Change 3 Authentication
A thru M/(N Blank)
A thru M/(N Blank)
i thru ii
i thru ii
B-1 thru B-19/(B-20 Blank)
B-1 thru B-20

By Order of the Secretary of the Army:

PETER J. SCHOOMAKER
General, United States Army
Chief of Staff

Administrative Assistant to the
Secretary of the Army
06019087

Official:

SANDRA R. RILEY

By Order of the Secretary of the Air Force:

JOHN P. JUMPER
General, United States Air Force
Chief of Staff

Official:

GREGORY S. MARTIN
General, United States Air Force
Commander, Air Force Materiel Command

Distribution:

To be distributed in accordance with the initial distribution number (IDN) 380934,
requirements for Family of Medium Tactical Vehicles (FMTV) TM 9-2320-365-20-1.

ARMY TM 9-2320-365-20-1
AIR FORCE T.O. 36A12-1B-1095-2-1

Place this change sheet in the front of the publication for reference purposes.

1 of 1

CHANGE
HEADQUARTERS
NO. 2
DEPARTMENTS OF THE ARMY
AND THE AIR FORCE
Washington, D.C., 20 August 2005

TECHNICAL MANUAL
MAINTENANCE INSTRUCTIONS
UNIT MAINTENANCE
M1078 SERIES, 2 1/2-TON, 4x4,
LIGHT MEDIUM TACTICAL VEHICLE
(LMTV)

VOLUME NO. 1 OF 5

TM 9-2320-365-20-1, 17 June 1998, is changed as follows:
1. Remove old pages and insert new pages as indicated below.
2. New or changed material is indicated by a vertical bar in the out margin of the page.
3. Added or revised illustrations are indicated by a vertical bar adjacent to the illustration.

Remove Pages
Insert Pages
Remove Pages
Insert Pages

e thru h
e thru h
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A thru J
none
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none
Change 2 Authentication Sheet
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FO-1 FP-61/(FP-62 Blank)
FO-1 FP-61/(FP-62 Blank)
Metric Conversion Chart
Metric Conversion Chart
/PIN
/PIN

0401503
DISTRIBUTION: To be distributed in accordance with the initial distribution number (IDN) 380934,
requirements for TM 9-2320-365-20-1.

By Order of the Secretary of the Army:

PETER J. SCHOOMAKER
General, United States Army
Chief of Staff
Official:

JOEL B. HUDSON
Administrative Assistant to the
Secretary of the Army

ARMY TM 9-2320-365-20-1
AIR FORCE T.O. 36A12-1B-1095-2-1

Place this change sheet in the front of the publication for reference purposes.

1 of 2

CHANGE
HEADQUARTERS
NO. 1
DEPARTMENTS OF THE ARMY
AND THE AIR FORCE

Washington, D.C. , 1 July 2003

TECHNICAL MANUAL
MAINTENANCE INSTRUCTIONS
UNIT MAINTENANCE
M1078 SERIES, 2 1/2-TON, 4x4,
LIGHT MEDIUM TACTICAL VEHICLE
(LMTV)

VOLUME NO. 1 OF 5

TM 9-2320-365-20-1, 17 June 1998, is changed as follows:
1. Remove old pages and insert new pages as indicated below.
2. New or changed material is indicated by a vertical bar in the out margin of the page.
3. Added or revised illustrations are indicated by a vertical bar adjacent to the illustration.

Remove Pages
Insert Pages
Remove Pages
Insert Pages

i and j
i and j
none
A thru J
i thru xi/(xii Blank)
i thru xii
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2-1 thru 2-6
none
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Place this change sheet in the front of the publication for reference purposes.

2 of 2

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none
2-726.1 and 2-726.2
2-727 thru 2-740
2-727 thru 2-740
2-749 thru 2-800
2-749 thru 2-800
2-803 thru 2-822
2-803 thru 2-822
2-905 thru 2-918
2-905 thru 2-918
none
2-918.1 thru 2-918.6
2-919 and 2-920
2-919 and 2-920
2-1009 thru 2-1016
2-1009 thru 2-1016
none
2-1016.1 thru 2-1016.10
2-1017 and 2-1018
2-1017 and 2-1018
A-1 thru A-4
A-1 thru A-4
B-13 thru B-20
B-13 thru B-19/(B-20 Blank)
C-3 and C-4
C-3 and C-4
D-1 thru D-5/(D-6 Blank)
D-1 thru D-6
E3 and E4
E3 and E4
none
E-21 and E-22
G-1 thru G-10
G-1 thru G-10
none
G-11/(G-12 Blank)
H-1 thru H-8
H-1 thru H-8
H-17 thru H-21/
H-17 thru H-21/
(H-22 Blank)
(H-22 Blank)
none
K-1 thru K-4

INDEX-1 thru INDEX-38
INDEX-1 thru INDEX-38
Index-39/(Index-40 Blank)
none
DA Form 2028-2 Sample
DA Form 2028 Sample
DA Form 2028-2
DA Form 2028
DA Form 2028-2
DA Form 2028
DA Form 2028-2
DA Form 2028
FO-1 FP-1/(FP-2 Blank)
FO-1 FP-1/(FP-2 Blank)
thru FP-19/(FP-20 Blank)
thru FP-19/(FP-20 Blank)
FO-1 FP-23/(FP-24 Blank)
FO-1 FP-23/(FP-24 Blank)
FO-1 FP-27/(FP-28 Blank)
FO-1 FP-27/(FP-28 Blank)
thru FP-61/(FP-62 Blank)
thru FP-61/(FP-62 Blank)
FO-1 FP-65/(FP-66 Blank)
FO-1 FP-65/(FP-66 Blank)
and FP-67/(FP-68 Blank)
and FP-67/(FP-68 Blank)
Metric Conversion Chart
Metric Conversion Chart
Cover
Cover

By Order of the Secretary of the Army:

JOHN M. KEANE
General, United States Army
Chief of Staff

Administrative Assistant to the
Secretary of the Army
0110102

DlSTRlBUTlON: To be distributed in accordance with the initial distribution
number (IDN) 380934, requirements for TM 9-2320-365-20-1.

TM 9-2320-365-20-1

Change 3 A

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

NOTE: New or changed material is indicated by a
vertical bar in the outer margin of the page.
Dates of issue for original and changed pages are:
Original ...................... 0......... 17 June 1998
Change ...................... 1..................... 1 July 2003
Change ...................... 2................ 20 August 2005
Change ...................... 3.............. 10 February 2006
THE TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 5992, CONSISTING OF THE FOLLOWING:
Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

VOLUME 1
Cover...........................................1
Blank............................................0
a thru e ........................................0
f....................................................2
g...................................................0
h...................................................2
i ...................................................1
j....................................................0
A thru M.......................................3
N Blank Added ............................2
i and ii ..........................................1
iii ..................................................0
iv thru xii ......................................1
1-1 thru 1-27................................0
1-28 Blank ...................................0
2-1 thru 2-6..................................1
2-6.1 and 2-6.2 Added.................1
2-7 and 2-8..................................1
2-9 thru 2-11................................2
2-12 thru 2-15..............................0
2-16 and 2-17..............................1
2-18 .............................................0
2-19 .............................................1
2-20 .............................................0
2-21 and 2-22..............................2
2-23 thru 2-32..............................0
2-33 .............................................2
2-34 thru 2-36..............................0
2-37 .............................................2
2-38 thru 2-40..............................0
2-41 .............................................2
2-42 .............................................0
2-43 .............................................2
2-44 .............................................0
2-45 .............................................2
2-46 .............................................0
2-47 and 2-48..............................2

2-49 and 2-50................................0
2-51...............................................2
2-52...............................................0
2-53...............................................1
2-54...............................................0
2-55...............................................1
2-56...............................................2
2-57...............................................1
2-58 and 2-59................................2
2-60...............................................1
2-61 and 2-62................................2
2-63 thru 2-69 ...............................1
2-70 Blank.....................................1
2-71 Blank.....................................1
2-72 and 2-73................................1
2-74 thru 2-98 ...............................0
2-99 and 2-100..............................1
2-100.1 thru 2-100.7 Added..........1
2-100.8 Blank Added ....................1
2-101 thru 2-106 ...........................1
2-106.1 thru 2-106.8 Added..........1
2-107.............................................1
2-108 thru 2-117 ...........................0
2-118 Blank...................................0
2-119.............................................1
2-120 thru 2-127 ...........................0
2-128 Blank...................................0
2-129.............................................1
2-130.............................................2
2-131.............................................1
2-132 thru 2-136 ...........................2
2-137.............................................1
2-138 thru 2-140 ...........................2
2-141 thru 2-144 ..........................1
2-144.1 thru 2-144.4 Added..........1
2-145.............................................1
2-146 Blank...................................0
2-147.............................................2
2-148 thru 2-152 ...........................1
2-152.1 thru 2-152.6 Added..........1

2-153 thu 2-256 .......................... 1
2-256.1 thru 2-256.34 Added...... 1
2-257 thru 2-274 ......................... 1
2-274.1 thru 2-274.24 Added...... 1
2-275........................................... 1
2-276 Blank................................. 1
2-277 thru 2-298 Deleted............ 1
2-299 Blank................................. 1
2-300 thru 2-306 ......................... 1
2-306.1 thru 2-306.4 Added........ 1
2-307 thru 2-312 ......................... 1
2-312.1 and 2-312.2 Added........ 1
2-313 thru 2-316 ......................... 1
2-316.1 thru 2-316.4 Added........ 1
2-317 thru 2-320 ......................... 1
2-320.1 thru 2-320.8 Added........ 1
2-321 thru 2-324 ......................... 1
2-324.1 thru 2-324.8 Added........ 1
2-325........................................... 1
2-326 thru 2-328 ......................... 2
2-328.1 and 2-328.2 Added........ 2
2-329 thru 2-331 ......................... 2
2-332 thru 2-344 ......................... 1
2-344.1 thru 2-344.6 Added........ 1
2-345 and 2-346 ......................... 1
2-346.1 thru 2-346.6 Added........ 1
2-347 thru 2-356 ......................... 1
2-356.1 thru 2-356.8 Added........ 1
2-357 thru 2-370 ......................... 1
2-3701.1 thru 2-370.3 ................. 1
2-370.4 and 2-370.5 ................... 2
2-370.6 thru 2-370.9 Deleted...... 2
2-370.10...................................... 1
2-370.12 Added .......................... 1
2-371 thru 2-376 ......................... 1
2-376.1 thru 2-376.14 Added...... 1
2-377 thru 2-380 ......................... 1
2-380.1 thru 2-380.26 Added...... 1

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

B Change 3

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

2-381 thru 2-384..........................1
2-384.1 thru 384.6 Added ...........1
2-385 ...........................................1
2-386 thru 2-389..........................0
2-390 thru 2-392..........................1
2-392.1 thru 2-392.4 Added ........1
2-393 ...........................................1
2-394 thru 2-408..........................0
2-408.1 thru 2-408.16 Added ......2
2-409 ...........................................2
2-410 thru 2-443..........................0
2-444 thru 2-459..........................1
2-460 thru 2-491..........................0
2-492 thru 2-496..........................1
2-496.1 and 2-496.2 Added ........1
2-497 thru 2-502..........................1
2-502.1 and 2-502.2 Added ........1
2-503 ...........................................1
2-504 thru 2-511..........................0
2-512 thru 2-518..........................1
2-518.1 and 2-518.2 Added ........1
2-519 ...........................................1
2-520 thru 2-541..........................0
2-542 ...........................................1
2-542.1 and 2-542.2 Added ........1
2-543 thru 2-546..........................1
2-546.1 and 2-546.2 Added ........1
2-547 and 2-548..........................1
2-548.1 thru 2-548.6 Added ........1
2-549 thru 2-556..........................1
2-556.1 thru 2-556.4 Added ........1
2-557 thru 2-560..........................1
2-560.1 thru 2-560.6 Added ........1
2-561 thru 2-574..........................1
2-574.1 and 2-574.2 Added ........1
2-575 thru 2-578..........................1
2-578.1 thru 2-578.14 Added ......1
2-579 thru 2-584..........................1
2-584.1 thru 2-584.64 Added ......1
2-585 thru 2-594..........................1
2-594.1 thru 2-594.20 Added ......1
2-595 ...........................................1
2-596 thru 2-615..........................0
2-616 thru 2-621..........................1
2-622 Blank .................................1
2-623 Blank .................................1
2-624 and 2-625..........................1
2-626 thru 2-637..........................0
2-638 thru 2-673..........................1
2-674 Blank .................................1

2-675 Blank.....................................1
2-676 thru 2-685 .............................1
2-686 Blank.....................................1
2-687 Blank.....................................1
2-688 and 2-689..............................1
2-690 thru 2-709 .............................0
2-710 thru 2-714 .............................1
2-714.1 and 2-714.2 Added............1
2-715 and 2-716..............................1
2-716.1 and 2-716.2 Added............1
2-717 and 2-718..............................1
2-718.1 and 2-718.2 Added............1
2-719 thru 2-722 .............................1
2-722.1 and 2-722.2 Added............1
2-723 thru 2-726 .............................1
2-726.1 and 2-726.2 Added............1
2-727 thru 2-739 .............................1
2-740 thru 2-749 .............................0
2-750 thru 2-799 .............................1
2-800 thru 2-803 .............................0
2-804 thru 2-821 .............................1
2-822 thru 2-905 .............................0
2-906 thru 2-918 .............................2
2-918.1 thru 2-918.6 .......................2
2-918.7 thru 2-918.20 Added..........2
2-919...............................................2
2-920 thru 2-945 .............................0
2-946 thru 2-1009 ...........................2
2-1010 thru 2-1016 .........................1
2-1016.1 thru 2-1016.10 Added......1
2-1017.............................................1
2-1018 thru 2-1085 .........................0
2-1086 Blank...................................0
A-1...................................................0
A-2 and A-3.....................................1
A-4...................................................0
B-1...................................................3
B-2...................................................0
B-3 thru B-20...................................3
C-1 ..................................................0
C-2 thru C-4 ....................................2
D-1 ..................................................1
D-2 ..................................................2
D-3 thru D-5 ....................................1
D-6 ..................................................2
E-1 and E-2.....................................0
E-3 and E-4.....................................1
E-5 thru E-20...................................0
E-21 and E-22 Added .....................1
F-1 thru F-8.....................................0

G-1...............................................2
G-2...............................................1
G-3 thru G-7.................................2
G-8...............................................1
G-9 thru G-11...............................2
G-12 Blank Added .......................1
H-1 thru H-6.................................2
H-7...............................................0
H-8 thru H-10...............................2
H-11.............................................0
H-12.............................................2
H-13 thru H-15.............................0
H-16 thru H-18.............................2
H-19.............................................1
H-20 and H-21 .............................2
H-22 Blank...................................0
J-1................................................0
J-2 Blank......................................0
K-1 Added....................................1
K-2 and K-3..................................2
K-4 Added....................................1
INDEX-1 thru INDEX-4................1
INDEX-5.......................................2
INDEX-6.......................................1
INDEX-7 thru INDEX-11..............2
INDEX-12 and INDEX-13 ............1
INDEX-14 thru INDEX-16............2
INDEX-17 and INDEX-18 ............1
INDEX-19.....................................2
INDEX-20.....................................1
INDEX-21 thru INDEX-25............2
INDEX-26.....................................1
INDEX-27 thru INDEX-35............2
INDEX-36 thru INDEX-38............1
INDEX-39 Deleted.......................1
INDEX-40 Blank Deleted.............1
Glossary-1 and Glossary-2..........0
FO-1 FP-1....................................1
FO-1 FP-2 Blank..........................0
FO-1 FP-3....................................2
FO-1 FP-4 Blank..........................0
FO-1 FP-5....................................1
FO-1 FP-6 Blank..........................0
FO-1 FP-7....................................1
FO-1 FP-8 Blank..........................0
FO-1 FP-9....................................1
FO-1 FP-10 Blank........................0

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

Change 3 C

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

FO-1 FP-11.............................. 1
FO-1 FP-12 Blank.................... 0
FO-1 FP-13.............................. 1
FO-1 FP-14 Blank.................... 0
FO-1 FP-15.............................. 1
FO-1 FP-16 Blank.................... 0
FO-1 FP-17.............................. 1
FO-1 FP-18 Blank.................... 0
FO-1 FP-19.............................. 1
FO-1 FP-20 Blank.................... 0
FO-1 FP-21.............................. 0
FO-1 FP-22 Blank.................... 0
FO-1 FP-23.............................. 1
FO-1 FP-24 Blank.................... 0
FO-1 FP-25.............................. 0
FO-1 FP-26 Blank.................... 0
FO-1 FP-27.............................. 1
FO-1 FP-28 Blank.................... 0
FO-1 FP-29.............................. 1
FO-1 FP-30 Blank.................... 0
FO-1 FP-31.............................. 1
FO-1 FP-32 Blank.................... 0
FO-1 FP-33.............................. 1
FO-1 FP-34 Blank.................... 0
FO-1 FP-35.............................. 1
FO-1 FP-36 Blank.................... 0
FO-1 FP-37.............................. 1
FO-1 FP-38 Blank.................... 0
FO-1 FP-39.............................. 1
FO-1 FP-40 Blank.................... 0
FO-1 FP-41.............................. 1
FO-1 FP-42 Blank.................... 0
FO-1 FP-43.............................. 1
FO-1 FP-44 Blank.................... 0
FO-1 FP-45.............................. 1
FO-1 FP-46 Blank.................... 0
FO-1 FP-47.............................. 1
FO-1 FP-48 Blank.................... 0
FO-1 FP-49.............................. 1
FO-1 FP-50 Blank.................... 0
FO-1 FP-51.............................. 1
FO-1 FP-52 Blank.................... 0
FO-1 FP-53.............................. 1
FO-1 FP-54 Blank.................... 0
FO-1 FP-55.............................. 1
FO-1 FP-56 Blank.................... 0
FO-1 FP-57.............................. 1
FO-1 FP-58 Blank.................... 0
FO-1 FP-59.............................. 1
FO-1 FP-60 Blank.................... 0

FO-1 FP-61 ............................... 2
FO-1 FP-62 Blank ..................... 0
FO-1 FP-63 ............................... 0
FO-1 FP-64 Blank ..................... 0
FO-1 FP-65 ............................... 1
FO-1 FP-66 Blank ..................... 0
FO-1 FP-67 ............................... 1
FO-1 FP-68 Blank ..................... 0
FO-2 FP-1 ................................. 0
FO-2 FP-2 Blank ....................... 0
FO-2 FP-3 ................................. 0
FO-2 FP-4 Blank ....................... 0
FO-2 FP-5 ................................. 0
FO-2 FP-6 Blank ....................... 0
FO-2 FP-7 ................................. 0
FO-2 FP-8 Blank ....................... 0
FO-3 FP-1 ................................. 0
FO-3 FP-2 Blank ....................... 0
FO-3 FP-3 ................................. 0
FO-3 FP-4 Blank ....................... 0
FO-3 FP-5 ................................. 0
FO-3 FP-6 Blank ....................... 0
FO-4 FP-1 ................................. 0
FO-4 FP-2 Blank ....................... 0
FO-4 FP-3 ................................. 0
FO-4 FP-4 Blank ....................... 0
FO-5 FP-1 ................................. 0
FO-5 FP-2 Blank ....................... 0
FO-5 FP-3 ................................. 0
FO-5 FP-4 Blank ....................... 0
FO-5 FP-5 ................................. 0
FO-5 FP-6 Blank ....................... 0
VOLUME 2
Cover......................................... 1
Blank ......................................... 0
a thru e ...................................... 0
f.................................................. 2
g................................................. 0
h................................................. 2
i ................................................. 1
j.................................................. 0
A thru C ..................................... 3
D Blank...................................... 2
i.................................................. 1
ii................................................. 0
iii and iv ..................................... 1
v and vi Added........................... 1
2-1086.1 Added......................... 1
2-1086.2 Blank Added............... 1
2-1087 ....................................... 1

2-1088 thru 2-1103 ..................... 0
2-1104 thru 2-1107 ..................... 1
2-1108 and 2-1175 ..................... 0
2-1176 thru 2-1221 ..................... 1
2-1222 thru 2-1229 ..................... 0
2-1230 thru 2-1243 ..................... 1
2-1244 thru 2-1357 ..................... 0
2-1358 Blank............................... 0
2-1359 and 2-1360 ..................... 2
2-1361 Blank............................... 0
2-1362 and 2-1363 ..................... 0
2-1364 thru 2-1399 ..................... 1
2-1400......................................... 2
2-1401......................................... 1
2-1402......................................... 2
2-1403 thru 2-1440 ..................... 1
2-1441......................................... 2
2-1442 thru 2-1462 ..................... 1
2-1462.1 and 2-1462.2 Added.... 1
2-1463 thru 2-1482 ..................... 1
2-1482.1 thru 2-1482.42 Added.. 1
2-1483......................................... 1
2-1484 and 2-1485 ..................... 0
2-1486......................................... 1
2-1486.1 thru 2-1486.4 Added.... 1
2-1487 thru 2-1521 ..................... 1
2-1522 thru 2-1525 ..................... 2
2-1526 thru 2-1568 ..................... 1
2-1568.1 and 1568.2 Added ....... 1
2-1569 thru 2-1593 ..................... 1
2-1594......................................... 0
2-1595 and 2-1596 ..................... 1
2-1596.1 thru 2-1596.29 Added.. 1
2-1596.30 Blank Added .............. 1
2-1597 thru 2-1601 ..................... 1
2-1602 Blank............................... 0
2-1603......................................... 1
2-1604 thru 2-1605 ..................... 0
2-1606 Blank............................... 0
2-1607......................................... 1
2-1608 thru 2-1643 ..................... 0
2-1644......................................... 2
2-1645......................................... 1
2-1646......................................... 2
2-1647......................................... 1
2-1648......................................... 2
2-1649......................................... 1
2-1650......................................... 2

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

D Change 3

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

2-1651.....................................1
2-1652.....................................2
2-1653.....................................1
2-1654.....................................2
2-1655.....................................1
2-1656.....................................2
2-1657.....................................1
2-1658.....................................2
2-1659.....................................1
2-1660.....................................2
2-1661.....................................1
2-1662.....................................2
2-1663.....................................1
2-1664.....................................2
2-1665.....................................1
2-1666 Blank...........................1
2-1667 and 2-1668 Deleted....1
2-1669 Blank...........................1
2-1670 thru 2-1695 .................1
2-1696 Blank...........................1
2-1697 Blank...........................1
2-1698 and 2-1699 .................1
2-1700 thru 2-1711 .................0
2-1712.....................................1
2-1712.1 Added ......................1
2-1712.2 Blank Added ............1
2-1713 thru 2-1729 .................1
2-1730 thru 2-1737 .................0
2-1738 thru 2-1742 .................1
2-1742.1 thru 2-1742.30
Added .....................................1
2-1743 thru 2-1747 .................1
2-1748 thru 2-1751 .................0
2-1752 Blank...........................0
2-1753.....................................1
2-1754 thru 2-1759 .................0
2-1760 Blank...........................0
2-1761.....................................1
2-1762 thru 2-1765 .................0
2-1766 Blank...........................0
2-1767 thru 2-1769 .................1
2-1770 thru 2-1821 .................0
2-1822 thru 2-1826 .................2
2-1827.....................................1
2-1828.....................................2
2-1829.....................................1
2-1830.....................................2
2-1831.....................................1
2-1832 Blank...........................1
2-1833 thru 2-1852 Deleted....1

2-1853 Blank ............................. 1
2-1854 ....................................... 2
2-1855 ....................................... 1
2-1856 thru 2-1861.................... 0
2-1862 thru 2-1869.................... 1
2-1870 Blank ............................. 1
2-1871 Blank ............................. 1
2-1872 and 2-1873.................... 1
2-1874 thru 2-1893.................... 0
2-1894 Blank ............................. 0
2-1895 thru 2-1901.................... 1
2-1902 Blank ............................. 0
2-1903 ....................................... 1
2-1904 thru 2-1923.................... 0
2-1924 Blank ............................. 0
2-1925 ....................................... 1
2-1926 thru 2-1943.................... 0
2-1944 Blank ............................. 0
2-1945 ....................................... 1
2-1946 thru 2-1951.................... 0
2-1952 Blank ............................. 0
2-1953 ....................................... 1
2-1954 thru 2-1957.................... 0
2-1958 Blank ............................. 0
2-1959 thru 2-1968.................... 1
2-1968.1 thru 2-1968.18
Added........................................ 1
2-1969 and 2-1970.................... 1
2-1970.1 thru 2-1970.14............ 1
2-1971 thru 2-1974.................... 1
2-1974.1 thru 2-1974.22
Added........................................ 1
2-1975 ....................................... 1
2-1976 Blank ............................. 0
2-1977 and 2-1978.................... 2
2-1979 thru 2-2013 Added ........ 2
2-2014 Blank Added.................. 2
2-2015 thru 2-2076 Deleted ...... 1
2-2077 Blank ............................. 1
2-2078 ....................................... 1
2-2079 thru 2-2113.................... 0
2-2114 Blank ............................. 0
2-2115 and 2-2116.................... 1
2-2116.1 Added......................... 1
2-2116.2 Blank Added............... 1
2-2116.3 thru 2-2116.9
Added........................................ 1
2-2116.10 Blank Added............. 1
2-2116.11 and 2-2116.12
Added........................................ 1

2-2117 and 2-2118 ....................1
2-2118.1 Added .........................1
2-2118.2 Blank Added...............1
2-2118.3 thru 2-2118.7
Added ........................................1
2-2118.8 Blank Added...............1
2-2118.9 and 2-2118.10
Added ........................................1
2-2119........................................1
2-2120 Blank..............................0
2-2121........................................1
2-2122 thru 2-2125....................0
2-2126 Blank..............................0
2-2127 thru 2-2132....................0
2-2132.1 Added .........................1
2-2132.2 Blank Added...............1
2-2133........................................1
2-2134 thru 2-2136....................0
3-1..............................................1
3-2 thru 3-14 ..............................0
3-15 thru 3-17 ............................1
3-18 thru 3-21 ............................0
3-22 Blank..................................0
A-1 .............................................0
A-2 and A-3................................1
A-4 .............................................0
B-1 .............................................3
B-2 .............................................0
B-3 thru B-20 .............................3
C-1.............................................0
C-2 thru C-4...............................2
D-1.............................................1
D-2.............................................2
D-3 thru D-5...............................1
D-6.............................................2
E-1 and E-2................................0
E-3 and E-4................................1
E-5 thru E-20 .............................0
E-21 and E-22 Added................1
F-1 thru F-8................................0
G-1.............................................2
G-2.............................................1
G-3 thru G-7...............................2
G-8.............................................1
G-9 thru G-11.............................2
G-12 Blank Added .....................1
H-1 thru H-6...............................2
H-7.............................................0
H-8 thru H-10.............................2

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

Change 3 E

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

H-11 ......................................... 0
H-12 ......................................... 2
H-13 thru H-15......................... 0
H-16 thru H-18......................... 2
H-19 ......................................... 1
H-20 and H-21 ......................... 2
H-22 Blank............................... 0
J-1............................................ 0
J-2 Blank.................................. 0
K-1 Added................................ 1
K-2 and K-3.............................. 2
K-4 Added................................ 1
INDEX-1................................... 1
INDEX-2 thru INDEX-4 ............ 2
INDEX-5................................... 1
INDEX-6 thru INDEX-11.......... 2
INDEX-12................................. 1
Glossary-1 and Glossary-2...... 0
FO-1 FP-1................................ 1
FO-1 FP-2 Blank...................... 0
FO-1 FP-3................................ 2
FO-1 FP-4 Blank...................... 0
FO-1 FP-5................................ 1
FO-1 FP-6 Blank...................... 0
FO-1 FP-7................................ 1
FO-1 FP-8 Blank...................... 0
FO-1 FP-9................................ 1
FO-1 FP-10 Blank.................... 0
FO-1 FP-11.............................. 1
FO-1 FP-12 Blank.................... 0
FO-1 FP-13.............................. 1
FO-1 FP-14 Blank.................... 0
FO-1 FP-15.............................. 1
FO-1 FP-16 Blank.................... 0
FO-1 FP-17.............................. 1
FO-1 FP-18 Blank.................... 0
FO-1 FP-19.............................. 1
FO-1 FP-20 Blank.................... 0
FO-1 FP-21.............................. 0
FO-1 FP-22 Blank.................... 0
FO-1 FP-23.............................. 1
FO-1 FP-24 Blank.................... 0
FO-1 FP-25.............................. 0
FO-1 FP-26 Blank.................... 0
FO-1 FP-27.............................. 1
FO-1 FP-28 Blank.................... 0
FO-1 FP-29.............................. 1
FO-1 FP-30 Blank.................... 0
FO-1 FP-31.............................. 1

FO-1 FP-32 Blank .......................0
FO-1 FP-33 .................................1
FO-1 FP-34 Blank .......................0
FO-1 FP-35 .................................1
FO-1 FP-36 Blank .......................0
FO-1 FP-37 .................................1
FO-1 FP-38 Blank .......................0
FO-1 FP-39 .................................1
FO-1 FP-40 Blank .......................0
FO-1 FP-41 .................................1
FO-1 FP-42 Blank .......................0
FO-1 FP-43 .................................1
FO-1 FP-44 Blank .......................0
FO-1 FP-45 .................................1
FO-1 FP-46 Blank .......................0
FO-1 FP-47 .................................1
FO-1 FP-48 Blank .......................0
FO-1 FP-49 .................................1
FO-1 FP-50 Blank .......................0
FO-1 FP-51 .................................1
FO-1 FP-52 Blank .......................0
FO-1 FP-53 .................................1
FO-1 FP-54 Blank .......................0
FO-1 FP-55 .................................1
FO-1 FP-56 Blank .......................0
FO-1 FP-57 .................................1
FO-1 FP-58 Blank .......................0
FO-1 FP-59 .................................1
FO-1 FP-60 Blank .......................0
FO-1 FP-61 .................................2
FO-1 FP-62 Blank .......................0
FO-1 FP-63 .................................0
FO-1 FP-64 Blank .......................0
FO-1 FP-65 .................................1
FO-1 FP-66 Blank .......................0
FO-1 FP-67 .................................1
FO-1 FP-68 Blank .......................0
FO-2 FP-1 ...................................0
FO-2 FP-2 Blank .........................0
FO-2 FP-3 ...................................0
FO-2 FP-4 Blank .........................0
FO-2 FP-5 ...................................0
FO-2 FP-6 Blank .........................0
FO-2 FP-7 ...................................0
FO-2 FP-8 Blank .........................0
FO-3 FP-1 ...................................0
FO-3 FP-2 Blank .........................0
FO-3 FP-3 ...................................0
FO-3 FP-4 Blank .........................0
FO-3 FP-5 ...................................0

FO-3 FP-6 Blank .........................0
FO-4 FP-1 ...................................0
FO-4 FP-2 Blank .........................0
FO-4 FP-3 ...................................0
FO-4 FP-4 Blank .........................0
FO-5 FP-1 ...................................0
FO-5 FP-2 Blank .........................0
FO-5 FP-3 ...................................0
FO-5 FP-4 Blank .........................0
FO-5 FP-5 ...................................0
FO-5 FP-6 Blank .........................0
VOLUME 3
Cover...........................................1
Blank ...........................................0
a thru e ........................................0
f ...................................................2
g ..................................................0
h ..................................................2
i....................................................1
j....................................................0
A thru D .......................................3
i....................................................1
ii...................................................0
iii thru vi .......................................1
4-1 ...............................................1
4-2 thru 4-4..................................0
4-5 ...............................................1
4-6 thru 4-8..................................0
4-9 ...............................................1
4-10 .............................................0
4-10.1 and 4-10.2 Added ............1
4-11 .............................................0
4-12 and 4-13..............................1
4-14 .............................................0
4-15 .............................................1
4-16 and 4-17..............................0
4-18 .............................................1
4-19 thru 4-41..............................0
4-42 and 4-43..............................1
4-44 .............................................0
4-45 .............................................1
4-46 .............................................0
4-47 .............................................1
4-48 thru 4-59..............................0
4-60 .............................................1
4-61 and 4-62..............................0
4-63 .............................................1
4-64 thru 4-68..............................0

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

F Change 3

LIST OF EFFECTIVE PAGES (CONT)
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

4-69............................................1
4-70 thru 4-81 ............................0
4-82 thru 4-84 ............................1
4-85 thru 4-105 ..........................0
4-106 Blank................................0
5-1..............................................1
5-2 thru 5-6 ................................0
5-7 and 5-8 ................................1
5-9..............................................0
5-10 and 5-11 ............................1
5-12 and 5-13 ............................0
5-14 and 5-15 ............................1
5-16 Blank..................................0
6-1 thru 6-3 ................................1
6-4..............................................0
6-4.1 and 6-4.2 Added...............1
6-5..............................................1
6-6..............................................0
6-7..............................................1
6-8 and 6-9 ................................0
6-10 thru 6-13 ............................1
6-14............................................0
6-15 thru 6-18 ............................1
6-19............................................0
6-20 thru 6-22 ............................1
6-22.1 Added .............................1
6-22.2 Blank Added ...................1
6-23 thru 6-25 ............................1
6-26 and 6-27 ............................0
6-28............................................1
6-29 thru 6-31 ............................0
6-32............................................1
6-33............................................0
6-34............................................1
6-35 thru 6-38 ............................0
6-39............................................1
6-40 thru 6-45 ............................0
6-46............................................2
6-47 and 6-48 ............................0
6-49............................................1
6-50 thru 6-52 ............................0
6-53............................................1
6-54 thru 6-62 ............................0
6-63............................................2
6-64 thru 6-66 ............................0
6-67............................................1
6-68 and 6-69 ............................0
6-70............................................2
6-71............................................1
6-72............................................0

6-72.1 Added .............................1
6-72.2 Blank Added...................1
6-73 thru 6-78 ............................1
7-1 and 7-2 ................................1
7-3 and 7-4 ................................2
7-5 and 7-6 ................................0
7-7..............................................2
7-8 and 7-9 ................................1
7-10 thru 7-17 ............................0
7-18............................................2
7-19............................................0
7-20............................................2
7-21 thru 7-24 ............................0
7-25 thru 7-31 ............................1
7-32 thru 7-35 ............................0
7-36............................................1
7-36.1 thru 7-36.4 Added...........1
7-37 and 7-38 ...........................0
7-39............................................2
7-40............................................0
7-41............................................1
7-42 thru 7-44 ............................0
7-45............................................1
7-46 thru 7-51 ............................0
7-52............................................1
7-53 thru 7-55 ............................0
7-56............................................1
7-57............................................0
7-58............................................2
7-59 thru 7-62 ............................0
7-63............................................2
7-64............................................0
7-65............................................1
7-66............................................0
7-67 and 7-68 ............................1
7-69 thru 7-74 ............................0
7-75............................................1
7-76 thru 7-78 ............................0
7-79............................................1
7-80............................................0
7-81............................................2
7-82 thru 7-86 ............................0
7-87 and 7-88 ............................2
7-89............................................1
7-90 thru 7-102 ..........................0
7-103..........................................1
7-104..........................................2
7-105 thru 7-107 ........................0
7-108..........................................2
7-109 thru 7-118 ........................0

7-119 ......................................... 1
7-120 thru 7-142........................ 0
7-143 and 7-144........................ 1
7-145 ......................................... 0
7-146 and 7-147........................ 1
7-148 ......................................... 0
7-149 ......................................... 1
7-150 ......................................... 0
7-151 ......................................... 1
7-152 thru 7-159........................ 0
7-160 ......................................... 1
7-160.1 Added........................... 1
7-160.2 Blank Added................. 1
7-161 ......................................... 1
7-162 and 7-163........................ 2
7-164 and 7-165........................ 1
7-166 thru 7-168........................ 0
7-169 ......................................... 1
7-170 and 7-171........................ 0
7-172 ......................................... 1
7-173 ......................................... 0
7-174 ......................................... 2
7-175 thru 7-183........................ 0
7-184 thru 7-187........................ 2
7-188 ......................................... 0
7-189 and 7-190........................ 1
7-191 and 7-192........................ 0
7-193 ......................................... 1
7-194 ......................................... 0
7-195 thru 7-200........................ 1
7-200.1 and 7-200.2 Added ...... 1
7-201 thru 7-203........................ 1
7-204 thru 7-218........................ 0
7-219 thru 7-223........................ 1
7-224 thru 7-228........................ 0
7-229 thru 7-231........................ 1
7-232 ......................................... 0
7-233 thru 7-237........................ 1
7-238 ......................................... 0
7-239 ......................................... 1
7-240 thru 7-242........................ 0
7-243 and 7-244........................ 1
7-245 ......................................... 0
7-246 ......................................... 1
7-247 thru 7-253........................ 0
7-254 thru 7-256........................ 2
7-257 and 7-258........................ 0
7-259 ......................................... 1
7-260 thru 7-268........................ 0
7-269 ......................................... 1

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

Change 3 G

LIST OF EFFECTIVE PAGES (CONT)
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

7-270 thru 7-274 ...................... 0
7-275 and 7-276 ...................... 1
7-277........................................ 0
7-278........................................ 1
7-279........................................ 0
7-280........................................ 2
7-281 and 7-282 ...................... 0
7-283........................................ 2
7-284 and 7-285 ...................... 0
7-286........................................ 2
7-286.1 Added ......................... 2
7-286.2 Blank Added ............... 2
7-287........................................ 0
7-288........................................ 1
7-289........................................ 0
7-290 and 7-291 ...................... 1
7-292 and 7-293 ...................... 0
7-294........................................ 1
7-295 thru 7-297 ...................... 0
7-298........................................ 1
7-299 thru 7-302 ...................... 0
7-303 thru 7-316 ...................... 1
7-316.1 thru 7-316.4 Added..... 1
7-317 and 7-318 ...................... 1
7-319 thru 7-326 ...................... 0
7-327 and 7-328 ...................... 1
7-329........................................ 2
7-330 thru 7-342 ...................... 0
7-343 thru 7-346 ...................... 1
7-347 and 7-348 ...................... 0
7-349 and 7-350 ...................... 1
7-350.1 and 7-350.2 Added..... 1
7-351........................................ 1
7-352 and 7-353 ...................... 0
7-354 thru 7-356 ...................... 1
7-357........................................ 0
7-358 and 7-359 ...................... 1
7-360........................................ 0
7-361........................................ 1
7-362........................................ 0
7-363........................................ 1
7-364........................................ 0
7-365 thru 7-368 ...................... 1
7-369 thru 7-380 ...................... 0
7-381 thru 7-383 Added........... 1
7-384 Blank Added .................. 1
8-1............................................ 1
8-2 thru 8-9 .............................. 0
8-10.......................................... 1
8-11.......................................... 0

8-12............................................2
8-12.1 Added .............................1
8-12.2 Blank Added...................1
8-13 thru 8-15 ............................0
8-16............................................2
8-16.1 Added .............................1
8-16.2 Blank Added...................1
8-17 thru 8-20 ............................0
8-20.1 Added .............................2
8-20.2 Blank Added...................2
8-21 thru 8-31 ............................0
8-32............................................2
8-33............................................0
8-34 thru 8-40 ............................1
8-40.1 Added .............................1
8-40.2 Blank Added...................1
8-41 thru 8-47 ............................1
8-48 and 8-49 ............................0
8-50............................................1
8-51 and 8-52 ............................0
8-53 and 8-54 ............................1
8-55 thru 8-69 Added.................1
8-70 Blank Added ......................1
9-1..............................................1
9-2..............................................2
9-2.1...........................................2
9-2.2...........................................1
9-2.3 and 9-2.4 Added...............2
9-3 and 9-4 ................................2
9-5 Added ..................................1
9-6 Blank Added ........................1
10-1............................................2
10-2............................................0
10-3 and 10-4 ............................1
10-5............................................0
10-6 and 10-7 ............................1
10-8............................................0
10-9............................................1
10-10 and 10-11 ........................0
10-12..........................................2
10-13..........................................0
10-14..........................................1
10-15 and 10-16 ........................0
10-17..........................................2
10-18..........................................1
10-19 and 10-20 ........................2
10-21 thru 10-27 Added.............2
10-28 Blank Added ....................2
11-1............................................1
11-2 thru 11-8 ............................0

11-9 and 11-10............................1
11-11 ...........................................0
11-12 ...........................................1
11-13 ...........................................0
11-14 ...........................................1
11-15 ...........................................0
11-16 ...........................................1
11-17 thru 11-20..........................0
11-21 ...........................................2
11-22 thru 11-30..........................0
11-31 ...........................................1
11-32 ...........................................0
11-33 thru 11-39..........................1
11-40 thru 11-42..........................0
11-43 thru 11-45..........................1
11-46 ...........................................0
11-47 thru 11-53..........................1
11-54 ...........................................0
11-55 thru 11-57..........................1
11-58 ...........................................0
11-58.1 and 11-58.2 Added ........1
11-59 ...........................................1
11-60 Blank .................................1
11-61 and 11-62..........................1
11-63 thru 11-65..........................0
11-66 thru 11-68..........................1
11-69 ...........................................0
11-70 thru 11-72..........................1
11-73 ...........................................0
11-74 ...........................................1
11-75 ...........................................0
11-76 and 11-77..........................1
11-78 and 11-79..........................0
11-80 thru 11-83..........................1
11-84 thru 11-86..........................0
11-86.1 Added.............................2
11-86.2 Blank Added...................2
11-87 thru 11-90..........................2
11-91 ...........................................1
11-92 ...........................................0
11-93 and 11-94..........................1
11-95 and 11-96..........................0
11-97 thru 11-104........................1
11-105 .........................................0
11-106 .........................................1
11-106.1 Added...........................1
11-106.2 Blank Added.................1
11-107 .........................................1
11-108 thru 11-110......................0
11-111 and 11-112......................1

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

H Change 3

LIST OF EFFECTIVE PAGES (CONT)
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

11-112.1 Added ......................1
11-112.2 Blank Added ............1
11-113.....................................0
11-114 thru 11-116 .................1
11-117.....................................0
11-118 and 11-119 .................1
11-120 thru 11-122 .................0
11-123.....................................1
11-124.....................................0
11-125 and 11-126 .................1
11-127.....................................0
11-128 and 11-129 .................1
11-130.....................................0
11-131.....................................1
11-132 and 11-133 .................0
11-134 and 11-135 .................1
11-136 thru 11-138 .................0
11-139 thru 11-142 .................1
11-143.....................................0
11-144.....................................1
11-144.1 thru 11-144.4
Added .....................................1
11-145 and 11-146 .................1
12-1.........................................2
12-2.........................................0
12-3 and 12-4 .........................2
12-5 thru 12-7 ........................0
12-8.........................................2
12-9 thru 12-13 .......................0
12-14.......................................2
12-15.......................................0
12-16.......................................1
12-16.1 Added ........................1
12-16.2 Blank Added ..............1
12-17 thru 12-19 .....................1
12-20 and 12-21 .....................0
12-22.......................................1
12-23 and 12-24 .....................0
12-25 and 12-26 Added..........2
13-1.........................................2
13-2 and 13-3 .........................0
13-4.........................................1
13-4.1 Added ..........................1
13-4.2 Blank Added ................1
13-5 thru 13-8 .........................1
13-8.1 Added ..........................1
13-8.2 Blank Added ................1
13-9 and 13-10 .......................0
13-11.......................................2
13-12.......................................0

13-13..........................................2
13-14..........................................0
13-15 thru 13-22..........................2
13-23 and 13-24..........................0
13-25 ...........................................2
13-26 ...........................................1
13-27 and 13-28..........................2
13-28.1 and 13-28.2 Added ........2
13-29 and 13-30..........................2
13-30.1 Added.............................2
13-30.2 Blank Added...................2
13-31 ...........................................2
13-32 ...........................................1
13-33 and 13-34..........................1
13-35 and 13-36..........................2
13-37 and 13-38 Added ..............2
14-1 thru 14-8..............................1
14-9 and 14-10 Deleted ..............1
14-11 Blank .................................1
14-12 thru 14-20..........................1
14-20.1 thru 14-20.4 Added ........1
14-21 ...........................................1
14-22 thru 14-34..........................0
14-35 and 14-36..........................2
14-37 and 14-38 Added ..............1
15-1 .............................................1
15-2 .............................................2
15-2.1 thru 15-2.3 Added ............2
15-2.4 Blank Added.....................2
15-3 .............................................2
15-4 .............................................1
15-5 thru 15-13............................0
15-14 Blank .................................0
A-1...............................................0
A-2 and A-3 .................................1
A-4...............................................0
B-1...............................................3
B-2...............................................0
B-3 thru B-20...............................3
C-1...............................................0
C-2 thru C-4.................................2
D-1...............................................1
D-2...............................................2
D-3 thru D-5.................................1
D-6...............................................2
E-1 and E-2 .................................0
E-3 and E-4 .................................1
E-5 thru E-20...............................0
E-21 and E-22 Added..................1
F-1 thru F-8 .................................0

G-1 ............................................ 2
G-2 ............................................ 1
G-3 thru G-7 .............................. 2
G-8 ............................................ 1
G-9 and G-10 ............................ 2
G-11 .......................................... 2
G-12 Blank Added..................... 1
H-1 thru H-6 .............................. 2
H-7............................................. 0
H-8 thru H-10 ............................ 2
H-11........................................... 0
H-12........................................... 2
H-13 thru H-15 .......................... 0
H-16 thru H-18 .......................... 2
H-19........................................... 1
H-20 and H-21........................... 2
H-22 Blank ................................ 0
J-1 ............................................. 0
J-2 Blank ................................... 0
K-1 Added ................................. 1
K-2 and K-3 ............................... 2
K-4 Added ................................. 1
INDEX-1 thru INDEX-3.............. 1
INDEX-4 .................................... 2
INDEX-5 and INDEX-6.............. 1
INDEX-7 thru INDEX-9.............. 2
INDEX-10 .................................. 1
INDEX-11 .................................. 2
INDEX-12 .................................. 1
Glossary-1 and Glossary-2 ....... 0
FO-1 FP-1 ................................. 1
FO-1 FP-2 Blank ....................... 0
FO-1 FP-3 ................................. 2
FO-1 FP-4 Blank ....................... 0
FO-1 FP-5 ................................. 1
FO-1 FP-6 Blank ....................... 0
FO-1 FP-7 ................................. 1
FO-1 FP-8 Blank ....................... 0
FO-1 FP-9 ................................. 1
FO-1 FP-10 Blank ..................... 0
FO-1 FP-11 ............................... 1
FO-1 FP-12 Blank ..................... 0
FO-1 FP-13 ............................... 1
FO-1 FP-14 Blank ..................... 0
FO-1 FP-15 ............................... 1
FO-1 FP-16 Blank ..................... 0
FO-1 FP-17 ............................... 1
FO-1 FP-18 Blank ..................... 0
FO-1 FP-19 ............................... 1

* Zero in this column indicates an original page.

TM 9-2320-365-20-1

Change 3 I

LIST OF EFFECTIVE PAGES
Insert latest changed pages. Destroy superseded pages.

Page
No.

*Change
No.
Page
No.
*Change
No.
Page
No.
*Change
No.

FO-1 FP-20 Blank......................0
FO-1 FP-21................................0
FO-1 FP-22 Blank......................0
FO-1 FP-23................................1
FO-1 FP-24 Blank......................0
FO-1 FP-25................................0
FO-1 FP-26 Blank......................0
FO-1 FP-27................................1
FO-1 FP-28 Blank......................0
FO-1 FP-29................................1
FO-1 FP-30 Blank......................0
FO-1 FP-31................................1
FO-1 FP-32 Blank......................0
FO-1 FP-33................................1
FO-1 FP-34 Blank......................0
FO-1 FP-35................................1
FO-1 FP-36 Blank......................0
FO-1 FP-37................................1
FO-1 FP-38 Blank......................0
FO-1 FP-39................................1
FO-1 FP-40 Blank......................0
FO-1 FP-41................................1
FO-1 FP-42 Blank......................0
FO-1 FP-43................................1
FO-1 FP-44 Blank......................0
FO-1 FP-45................................1
FO-1 FP-46 Blank......................0
FO-1 FP-47................................1
FO-1 FP-48 Blank......................0
FO-1 FP-49................................1
FO-1 FP-50 Blank......................0
FO-1 FP-51................................1
FO-1 FP-52 Blank......................0
FO-1 FP-53................................1
FO-1 FP-54 Blank......................0
FO-1 FP-55................................1
FO-1 FP-56 Blank......................0
FO-1 FP-57................................1
FO-1 FP-58 Blank......................0
FO-1 FP-59................................1
FO-1 FP-60 Blank......................0
FO-1 FP-61................................2
FO-1 FP-62 Blank......................0
FO-1 FP-63................................0
FO-1 FP-64 Blank......................0
FO-1 FP-65................................1
FO-1 FP-66 Blank......................0
FO-1 FP-67................................1
FO-1 FP-68 Blank......................0
FO-2 FP-1..................................0

FO-2 FP-2 Blank .........................0
FO-2 FP-3 ...................................0
FO-2 FP-4 Blank .........................0
FO-2 FP-5 ...................................0
FO-2 FP-6 Blank .........................0
FO-2 FP-7 ...................................0
FO-2 FP-8 Blank .........................0
FO-3 FP-1 ...................................0
FO-3 FP-2 Blank .........................0
FO-3 FP-3 ...................................0
FO-3 FP-4 Blank .........................0
FO-3 FP-5 ...................................0
FO-3 FP-6 Blank .........................0
FO-4 FP-1 ...................................0
FO-4 FP-2 Blank .........................0
FO-4 FP-3 ...................................0
FO-4 FP-4 Blank .........................0
FO-5 FP-1 ...................................0
FO-5 FP-2 Blank .........................0
FO-5 FP-3 ...................................0
FO-5 FP-4 Blank .........................0
FO-5 FP-5 ...................................0
FO-5 FP-6 Blank .........................0
VOLUME 4
Cover...........................................1
Blank ...........................................0
a thru e ........................................0
f....................................................2
g...................................................0
h...................................................2
i....................................................1
j....................................................0
A and B........................................3
C Added ......................................2
D Blank Added ............................2
i thru iv.........................................1
v Added .......................................1
vi Blank Added ............................1
16-1 .............................................1
16-2 .............................................2
16-3 and 16-4..............................1
16-4.1 Added...............................1
16-4.2 Blank Added.....................1
16-5 .............................................1
16-6 and 16-7..............................0
16-8 .............................................2
16-9 .............................................0
16-10 thru 16-12..........................1
16-12.1 ........................................2
16-12.2 Blank Added...................1

16-13 thru 16-15........................ 0
16-16 ......................................... 2
16-17 ......................................... 0
16-18 ......................................... 2
16-19 thru 16-21........................ 0
16-22 ......................................... 1
16-23 ......................................... 0
16-24 and 16-25........................ 1
16-26 thru 16-30........................ 0
16-31 and 16-32........................ 1
16-33 ......................................... 0
16-34 ......................................... 1
16-35 ......................................... 2
16-36 ......................................... 1
16-37 ......................................... 0
16-38 ......................................... 1
16-39 ......................................... 2
16-40 ......................................... 0
16-40.1 ...................................... 2
16-40.2 Blank Added................. 1
16-41 ......................................... 1
16-42 ......................................... 0
16-42.1 Added........................... 1
16-42.2 Blank Added................. 1
16-43 thru 16-55........................ 1
16-56 ......................................... 2
16-56.1 Added........................... 2
16-56.2 Blank Added................. 2
16-57 and 16-58........................ 2
16-59 ......................................... 0
16-60 thru 16-62........................ 1
16-62.1 Added........................... 1
16-62.2 Blank Added................. 1
16-63 thru 16-68........................ 1
16-69 ......................................... 2
16-70 thru 16-72........................ 1
16-73 and 16-74........................ 2
16-74.1 Added........................... 2
16-74.2 Blank Added................. 2
16-75 thru 16-77........................ 1
16-78 ......................................... 2
16-79 ......................................... 0
16-80 ......................................... 1
16-81 ......................................... 0
16-82 ......................................... 1
16-83 thru 16-96........................ 0
16-96.1 and 16-96.2 Added ...... 1
16-97 ......................................... 1

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*Change
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16-98 thru 16-104.....................0
16-105 thru 16-110...................1
16-110.1 and 16-110.2 Added .1
16-111 ......................................1
16-112 thru 16-115...................0
16-116 thru 16-119...................1
16-120 thru 16-127...................0
16-128 and 16-129...................1
16-130 thru 16-132...................0
16-133 ......................................1
16-134 thru 16-139...................0
16-140 ......................................1
16-141 thru 16-143...................0
16-144 thru 16-150...................1
16-151 ......................................0
16-152 ......................................1
16-153 thru 16-158...................0
16-159 ......................................1
16-160 thru 16-177...................0
16-178 thru 16-180...................1
16-181 thru 16-211...................0
16-212 ......................................1
16-213 thru 16-289...................0
16-290 thru 16-302...................1
16-303 thru 16-392...................0
16-393 thru 16-395...................1
16-396 thru 16-415...................0
16-416 ......................................1
16-417 thru 16-486...................0
16-487 ......................................2
16-488 Added...........................1
16-488.1 Added........................2
16-488.2 Blank Added..............2
16-489 ......................................2
16-490 thru 16-496 Added .......1
16-497 ......................................2
16-498 ......................................2
17-1 ..........................................1
17-2 thru 17-6...........................0
17-7 thru 17-9...........................1
17-10 thru 17-12.......................0
17-13 and 17-14.......................1
17-15 thru 17-18.......................0
17-19 and 17-20.......................2
17-20.1 thru 17-20.4 Added .....2
17-21 ........................................0
17-22 ........................................2
17-23 thru 17-27.......................0
17-28 ........................................1
17-29 and 17-30.......................0

18-1...............................................2
18-2 thru 18-5 ...............................0
18-6 thru 18-8 ...............................1
18-9 thru 18-22 .............................0
18-23 and 18-24............................2
18-24.1 thru 18-24.6 Added..........2
18-25.............................................2
18-26 thru 18-29 ...........................0
18-30.............................................1
18-31.............................................0
18-32.............................................1
18-33 thru 18-50 ...........................0
18-51.............................................1
18-52 thru 18-55 ...........................0
18-56 and 18-57............................1
18-58.............................................2
18-59 thru 18-67 ...........................0
18-68.............................................1
18-69 and 16-70............................2
18-71 Added .................................2
18-72 Blank Added .......................2
19-1...............................................2
19-2 thru 19-4 ...............................0
19-5 thru 19-8 ...............................1
19-8.1 thru 19-8.10 Added............1
19-9 thru 19-20 .............................1
19-20.1 thru 19-20.14 Added........1
19-21.............................................1
19-22 and 19-23............................0
19-24 and 19-25............................1
19-26 thru 19-46 ...........................0
19-47.............................................1
19-48 thru 19-50 ...........................0
19-51.............................................2
19-52.............................................1
19-53.............................................0
19-54 thru 19-58 ...........................1
19-59 thru 19-64 ...........................0
A-1.................................................0
A-2 and A-3...................................1
A-4.................................................0
B-1.................................................3
B-2.................................................0
B-3 thru B-20.................................3
C-1 ................................................0
C-2 thru C-4 ..................................2
D-1 ................................................1
D-2 ................................................2
D-3 thru D-5 ..................................1
D-6 ................................................2

E-1 and E-2 .................................0
E-3 and E-4 .................................1
E-5 thru E-20...............................0
E-21 and E-22 Added..................1
F-1 thru F-8 .................................0
G-1 ..............................................2
G-2 ..............................................1
G-3 thru G-7 ................................2
G-8 ..............................................1
G-9 thru G-11 ..............................2
G-12 Blank Added.......................1
H-1 thru H-6.................................2
H-7...............................................0
H-8 thru H-10...............................2
H-11.............................................0
H-12.............................................2
H-13 thru H-15.............................0
H-16 thru H-18.............................2
H-19.............................................1
H-20 and H-21.............................2
H-22 Blank...................................0
J-1 ...............................................0
J-2 Blank .....................................0
K-1 Added ...................................1
K-2 and K-3 .................................2
K-4 Added ...................................1
INDEX-1 ......................................2
INDEX-2 ......................................1
INDEX-3 ......................................2
INDEX-4 thru INDEX-7................1
INDEX-8 Blank ...........................0
Glossary-1 and Glossary-2 .........0
FO-1 FP-1 ...................................1
FO-1 FP-2 Blank .........................0
FO-1 FP-3 ...................................2
FO-1 FP-4 Blank .........................0
FO-1 FP-5 ...................................1
FO-1 FP-6 Blank .........................0
FO-1 FP-7 ...................................1
FO-1 FP-8 Blank .........................0
FO-1 FP-9 ...................................1
FO-1 FP-10 Blank .......................0
FO-1 FP-11 .................................1
FO-1 FP-12 Blank .......................0
FO-1 FP-13 .................................1
FO-1 FP-14 Blank .......................0
FO-1 FP-15 .................................1
FO-1 FP-16 Blank .......................0
FO-1 FP-17 .................................1

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FO-1 FP-18 Blank .......................0
FO-1 FP-19 .................................1
FO-1 FP-20 Blank .......................0
FO-1 FP-21 .................................0
FO-1 FP-22 Blank .......................0
FO-1 FP-23 .................................1
FO-1 FP-24 Blank .......................0
FO-1 FP-25 .................................0
FO-1 FP-26 Blank .......................0
FO-1 FP-27 .................................1
FO-1 FP-28 Blank .......................0
FO-1 FP-29 .................................1
FO-1 FP-30 Blank .......................0
FO-1 FP-31 .................................1
FO-1 FP-32 Blank .......................0
FO-1 FP-33 .................................1
FO-1 FP-34 Blank .......................0
FO-1 FP-35 .................................1
FO-1 FP-36 Blank .......................0
FO-1 FP-37 .................................1
FO-1 FP-38 Blank .......................0
FO-1 FP-39 .................................1
FO-1 FP-40 Blank .......................0
FO-1 FP-41 .................................1
FO-1 FP-42 Blank .......................0
FO-1 FP-43 .................................1
FO-1 FP-44 Blank .......................0
FO-1 FP-45 .................................1
FO-1 FP-46 Blank .......................0
FO-1 FP-47 .................................1
FO-1 FP-48 Blank .......................0
FO-1 FP-49 .................................1
FO-1 FP-50 Blank .......................0
FO-1 FP-51 .................................1
FO-1 FP-52 Blank .......................0
FO-1 FP-53 .................................1
FO-1 FP-54 Blank .......................0
FO-1 FP-55 .................................1
FO-1 FP-56 Blank .......................0
FO-1 FP-57 .................................1
FO-1 FP-58 Blank .......................0
FO-1 FP-59 .................................1
FO-1 FP-60 Blank .......................0
FO-1 FP-61 .................................2
FO-1 FP-62 Blank .......................0
FO-1 FP-63 .................................0
FO-1 FP-64 Blank .......................0
FO-1 FP-65 .................................1
FO-1 FP-66 Blank .......................0
FO-1 FP-67 .................................1

FO-1 FP-68 Blank .......................0
FO-2 FP-1 ...................................0
FO-2 FP-2 Blank .........................0
FO-2 FP-3 ...................................0
FO-2 FP-4 Blank .........................0
FO-2 FP-5 ...................................0
FO-2 FP-6 Blank .........................0
FO-2 FP-7 ...................................0
FO-2 FP-8 Blank .........................0
FO-3 FP-1 ...................................0
FO-3 FP-2 Blank .........................0
FO-3 FP-3 ...................................0
FO-3 FP-4 Blank .........................0
FO-3 FP-5 ...................................0
FO-3 FP-6 Blank .........................0
FO-4 FP-1 ...................................0
FO-4 FP-2 Blank .........................0
FO-4 FP-3 ...................................0
FO-4 FP-4 Blank .........................0
FO-5 FP-1 ...................................0
FO-5 FP-2 Blank .........................0
FO-5 FP-3 ...................................0
FO-5 FP-4 Blank .........................0
FO-5 FP-5 ...................................0
FO-5 FP-6 Blank .........................0
VOLUME 5
Cover...........................................1
Blank ...........................................0
a thru e ........................................0
f....................................................2
g...................................................0
h...................................................2
i....................................................1
j....................................................0
A and B........................................3
i thru iv.........................................1
v Added .......................................1
vi Blank Added ............................1
20-1 .............................................1
20-2 .............................................2
20-2.1 Added...............................1
20-2.2 Blank Added.....................1
20-3 .............................................1
20-4 Blank ...................................1
20-5 thru 20-184 Deleted ............1
20-185 .........................................0
20-186 thru 20-188......................2
20-188.1 and 20-188.2
Added..........................................2
20-189 thru 20-198......................2

20-199......................................... 0
20-200 thru 20-204 ..................... 2
20-204.1 and 20-204.2
Added.......................................... 2
20-205 thru 20-220 ..................... 2
20-220.1 and 20-220.2
Added.......................................... 2
20-221 thru 20-223 ..................... 2
20-224 thru 20-236 ..................... 0
20-237 thru 20-250 ..................... 2
20-251 thru 20-255 ..................... 0
20-256......................................... 2
20-256.1 thru 20-256.8
Added.......................................... 2
20-257 thru 20-259 ..................... 2
20-260 Blank............................... 2
20-261 and 20-262 Deleted........ 2
20-263......................................... 2
20-264 thru 20-280 ..................... 0
20-281......................................... 1
20-282 Blank............................... 1
20-283 thru 20-312 Deleted........ 1
20-313 Blank............................... 1
20-314......................................... 1
20-315 thru 20-318 ..................... 1
20-319 thru 20-326 ..................... 0
20-327 thru 20-330 ..................... 1
20-331......................................... 0
20-332......................................... 1
20-333......................................... 0
20-334......................................... 1
20-335 thru 20-343 ..................... 0
20-344......................................... 1
20-345 thru 20-347 ..................... 0
20-348 and 20-349 ..................... 1
20-350 and 20-351 ..................... 0
20-352 thru 20-354 ..................... 1
20-355 thru 20-464 ..................... 0
20-465 and 20-466 ..................... 1
20-467 thru 20-471 ..................... 0
20-472 thru 20-475 ..................... 1
20-476 thru 20-480 ..................... 0
20-481 thru 20-486 ..................... 2
20-486.1 Added .......................... 2
20-486.2 Blank Added ................ 2
20-487 and 20-488 ..................... 2
20-489 thru 20-556 Added.......... 2
21-1 thru 21-7 ............................. 1

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21-8............................................2
21-8.1 and 21-8.2 Added...........2
21-9............................................2
21-10 and 21-11 ........................1
21-12 and 21-13 ........................0
21-14 Blank................................0
22-1............................................1
22-2 thru 22-5 ............................0
22-6 Blank..................................0
23-1............................................1
23-2............................................0
23-3 and 23-4 ............................1
23-5 thru 23-8 ............................0
23-9 thru 23-11 ..........................1
23-12..........................................0
23-13..........................................1
23-14..........................................0
23-15 and 23-16 ........................1
23-17..........................................0
23-18..........................................1
23-19..........................................0
23-20..........................................1
23-21 and 23-22 ........................0
23-23..........................................1
23-24 and 23-25 ........................0
23-26..........................................1
23-27..........................................0
23-28..........................................1
23-29 and 23-30 ........................0
23-31 and 23-32 ........................1
23-32.1 and 23-32.2 Added.......1
23-33 and 23-34 ........................1
23-35 and 23-36 Added.............1
24-1............................................1
24-2............................................0
A-1 .............................................0
A-2 and A-3................................1
A-4 .............................................0
B-1 .............................................3
B-2 .............................................0
B-3 thru B-20 .............................3
C-1 .............................................0
C-2 thru C-4...............................2
C-3 and C-4 ...............................1
D-1 .............................................1
D-2 .............................................2
D-3 thru D-5...............................1
D-6 .............................................2
E-1 and E-2................................0

E-3 and E-4 .................................1
E-5 thru E-20...............................0
E-21 and E-22 Added..................1
F-1 thru F-8 .................................0
G-1 ..............................................2
G-2 ..............................................1
G-3 thru G-7 ................................2
G-8 ..............................................1
G-9 thru G-11 ..............................2
G-12 Blank Added.......................1
H-1 thru H-6.................................2
H-7...............................................0
H-8 thru H-10...............................2
H-11.............................................0
H-12.............................................2
H-13 thr H-15...............................0
H-16 thru H-18.............................2
H-19.............................................1
H-20 and H-21.............................2
H-22 Blank...................................0
J-1 ...............................................0
J-2 Blank .....................................0
K-1 Added ...................................1
K-2 and K-3 .................................2
K-4 Added ...................................1
INDEX-1 ......................................1
INDEX-2 and INDEX-3................2
INDEX-4 ......................................1
INDEX-5 ......................................2
INDEX-6 ......................................1
INDEX-7 Deleted.........................1
INDEX-8 Blank Deleted...............1
Glossary-1 and Glossary-2 .........0
FO-1 FP-1 ...................................1
FO-1 FP-2 Blank .........................0
FO-1 FP-3 ...................................2
FO-1 FP-4 Blank .........................0
FO-1 FP-5 ...................................1
FO-1 FP-6 Blank .........................0
FO-1 FP-7 ...................................1
FO-1 FP-8 Blank .........................0
FO-1 FP-9 ...................................1
FO-1 FP-10 Blank .......................0
FO-1 FP-11 .................................1
FO-1 FP-12 Blank .......................0
FO-1 FP-13 .................................1
FO-1 FP-14 Blank .......................0
FO-1 FP-15 .................................1
FO-1 FP-16 Blank .......................0
FO-1 FP-17 .................................1

FO-1 FP-18 Blank....................... 0
FO-1 FP-19................................. 1
FO-1 FP-20 Blank....................... 0
FO-1 FP-21................................. 0
FO-1 FP-22 Blank....................... 0
FO-1 FP-23................................. 1
FO-1 FP-24 Blank....................... 0
FO-1 FP-25................................. 0
FO-1 FP-26 Blank....................... 0
FO-1 FP-27................................. 1
FO-1 FP-28 Blank....................... 0
FO-1 FP-29................................. 1
FO-1 FP-30 Blank....................... 0
FO-1 FP-31................................. 1
FO-1 FP-32 Blank....................... 0
FO-1 FP-33................................. 1
FO-1 FP-34 Blank....................... 0
FO-1 FP-35................................. 1
FO-1 FP-36 Blank....................... 0
FO-1 FP-37................................. 1
FO-1 FP-38 Blank....................... 0
FO-1 FP-39................................. 1
FO-1 FP-40 Blank....................... 0
FO-1 FP-41................................. 1
FO-1 FP-42 Blank....................... 0
FO-1 FP-43................................. 1
FO-1 FP-44 Blank....................... 0
FO-1 FP-45................................. 1
FO-1 FP-46 Blank....................... 0
FO-1 FP-47................................. 1
FO-1 FP-48 Blank....................... 0
FO-1 FP-49................................. 1
FO-1 FP-50 Blank....................... 0
FO-1 FP-51................................. 1
FO-1 FP-52 Blank....................... 0
FO-1 FP-53................................. 1
FO-1 FP-54 Blank....................... 0
FO-1 FP-55................................. 1
FO-1 FP-56 Blank....................... 0
FO-1 FP-57................................. 1
FO-1 FP-58 Blank....................... 0
FO-1 FP-59................................. 1
FO-1 FP-60 Blank....................... 0
FO-1 FP-61................................. 2
FO-1 FP-62 Blank....................... 0
FO-1 FP-63................................. 0
FO-1 FP-64 Blank....................... 0
FO-1 FP-65................................. 1

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FO-2 FP-3 ................................. 0
FO-2 FP-4 Blank ....................... 0
FO-2 FP-5 ................................. 0
FO-2 FP-6 Blank ....................... 0
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i

TECHNICAL MANUAL
HEADQUARTERS
NO. 9-2320-365-20-1
DEPARTMENTS OF THE ARMY
AND THE AIR FORCE
TECHNICAL ORDER Washington, D.C., 17 June 1998
NO. 36A12-1B-1095-2-1
Unit Maintenance Manual
M1078 SERIES, 2 1/2-TON, 4 x 4,
LIGHT MEDIUM TACTICAL VEHICLES (LMTV)
VOLUME NO. 1 OF 5
MODEL
NSN
EIC
TRK, CAR., LMTV, M1078
W/WN
2320-01-360-1898
BHH
W/O WN
2320-01-354-3385
BHD
TRK, VAN, LMTV, M1079
W/WN
2320-01-360-1891
BHG
W/O WN
2320-01-354-3384
BHE
TRK, CHAS, LMTV, M1080
2320-01-353-9098
BHC
TRK, CAR., LMTV, AIR DROP, M1081
W/WN
2320-01-360-1899
BHJ
W/O WN
2320-01-355-3064
BHF

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this publication. If you find any mistakes or if you know of a way to improve the procedures,
please let us know. Submit your DA Form 2028 (Recommended Changes to Equipment Technical Publications),
through the Internet, on the Army Electronic Product Support (AEPS) website. The Internet address is
http://aeps.ria.army.mil. If you need a password, scroll down and click on "ACCESS REQUEST FORM". The DA
Form 2028 is located in the ONLINE FORMS PROCESSING section of the AEPS. Fill out the form and click on
SUBMIT. Using this form on the AEPS will enable us to respond quicker to your comments and better manage the
DA Form 2028 program. You may also mail, fax or Email a letter or DA Form 2028 direct to: AMSTA-LC-LPIT/TECH
PUBS, TACOM-RI, 1 Rock Island Arsenal, Rock Island, IL 61299-7630. The email address is TACOM-TECH-
PUBS@ria.army.mil. The fax number is DSN 793-0726 or Commercial (309) 782-0726.

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
TABLE OF CONTENTS
Page
...........................................................................................................................vi
CHAPTER 1
INTRODUCTION......................................................................................................... 1-1
...............................................................................................................................1-1
........................................................................................................ 1-5
Section III Principles of Operation........................................................................................................................1-6

Section I General Information

HOW TO USE THIS MANUAL

Section II Equipment Description and Data

TM 9-2320-365-20-1

ii Change 2

TABLE OF CONTENTS (CONT)
CHAPTER 2
VEHICLE MAINTENANCE............................................................................................................2-1
Section I Repair Parts, Special Tools and Test, Measurement and Diagnostic Equipment........................2-2
...................................................................................................................2-3
..................................................................2-6.1
.........................................................................................................................2-53
Section V Maintenance Procedures................................................................................................................2-2127
CHAPTER 3 ENGINE MAINTENANCE ..............................................................................................................3-1
Section I Introduction .................................................................................................................................................3-2
Section II Maintenance Procedures...........................................................................................................................3-2
CHAPTER 4 FUEL SYSTEM MAINTENANCE ................................................................................................4-1
Section I Introduction .................................................................................................................................................4-1
Section II Maintenance Procedures...........................................................................................................................4-2
CHAPTER 5 EXHAUST SYSTEM MAINTENANCE.......................................................................................5-1
Section I Introduction .................................................................................................................................................5-1
Section II Maintenance Procedures...........................................................................................................................5-2
CHAPTER 6 COOLING SYSTEM MAINTENANCE .......................................................................................6-1
Section I Introduction .................................................................................................................................................6-1
Section II Maintenance Procedures...........................................................................................................................6-2
CHAPTER 7 ELECTRICAL SYSTEM MAINTENANCE................................................................................7-1
Section I Introduction .................................................................................................................................................7-2
Section II Maintenance Procedures...........................................................................................................................7-3
CHAPTER 8 TRANSMISSION MAINTENANCE .............................................................................................8-1
Section I Introduction .................................................................................................................................................8-1
Section II Maintenance Procedures...........................................................................................................................8-2
CHAPTER 9 PROPELLER SHAFT MAINTENANCE ....................................................................................9-1
Section I Introduction .................................................................................................................................................9-1
Section II Maintenance Procedures...........................................................................................................................9-2
CHAPTER 10 FRONT AND REAR AXLE MAINTENANCE......................................................................10-1
Section I Introduction ...............................................................................................................................................10-1
Section II Maintenance Procedures.........................................................................................................................10-2

Section II Service Upon Receipt

Section III Preventative Maintenance and Services (PMCS)

Section IV Troubleshooting

TM 9-2320-365-20-1

CHAPTER 11 BRAKE SYSTEM MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-2

CHAPTER 12 WHEELS, TIRES, AND HUBS MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . .
12-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12-2

CHAPTER 13 STEERING SYSTEM MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-2

CHAPTER 14 FRAME, TOWING ATTACHMENTS, AND DRAWBARS
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14-2

CHAPTER 15 SUSPENSION SYSTEM MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15-2

CHAPTER 16 BODY AND CAB MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-2
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-3

CHAPTER 17 11K SELF-RECOVERY WINCH (SRW) MAINTENANCE . . . . . . . . . . . . . . . . .
17-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-2
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-3

CHAPTER 18 BODY, CHASSIS, AND ACCESSORY ITEMS MAINTENANCE . . . . . . . . . . .
18-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18-2

CHAPTER 19 HYDRAULIC SYSTEM MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-2

CHAPTER 20 SPECIAL PURPOSE KITS MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . . . . .
20-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20-2
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20-3

CHAPTER 21 ARMAMENT/SIGHTING AND FIRE CONTROL MATERIEL
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21-2
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21-2

CHAPTER 22 ELECTRICAL ILLUMINATING EQUIPMENT MAINTENANCE . . . . . . . . . . . .
22-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22-2

CHAPTER 23 AIR SYSTEM MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-2

iii

TM 9-2320-365-20-1

TABLE OF CONTENTS (CONT)

CHAPTER 24 GAGES (NON-ELECTRICAL) MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . .
24-1
Section I
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24-1
Section II
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24-2

APPENDIXES
A. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
B. MAINTENANCE ALLOCATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
C. TOOLS IDENTIFICATION LIST
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
D. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
E. ILLUSTRATED LIST OF MANUFACTURED ITEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1
F. TORQUE LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
G. MANDATORY REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1
H. LUBRICATION ORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-1
J. ADDITIONAL AUTHORIZATION LIST (AAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J-1
K. TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILTY CHART . . . . . . . . . . . . . . . . . . . . . . . K-1

SUBJECT INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary-1

LIST OF ILLUSTRATIONS

Figure No.
Figure Title
Page

1-1. M1078 Truck, Cargo: 2 1/2-Ton, 4x4, Dropside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-2. M1079 Truck, Van: 2 1/2 ton, 4x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-3. M1080 Truck, Chassis: 2 1/2-Ton, 4x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1-4. M1081 Truck, Cargo: 2 1/2-Ton, 4x4, Air Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1-5. Powertrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-6. Engine Air Intake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1-7. Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1-8. Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
1-9. Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1-10. Engine Starting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1-11. Service Lighting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1-12. Blackout Lighting System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1-13. Instrument System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1-14. Troubleshooting Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
1-15. Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1-16. Steering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
1-17. 11K Self-Recovery Winch (SRW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
1-18. Air Transportability Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1-19. Air System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

2-1. Circuit Breaker Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-151
7-1. Power Distribution Panel (PDP) Circuit Breakers, Diodes, and Relays . . . . . . . . . . . . . . . . . . . . . . . . . .
7-36
11-1. Front Brake Shoe Service Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-4
11-2. Rear Brake Shoe Service Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-11
11-3. Rear Brake Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-97
11-4. Rear Brake Control Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-99
11-5. Front Brake Air Hose Locations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-101
16-1. M1079 Van Body Interior Accessory Mounting Hardpoints
(Serial Numbers 001 through 190)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-260
16-2. M1079 Van Body Interior Accessory Mounting Hardpoints
(Serial Numbers 191 and Higher) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-261

iv
Change 1

TM 9-2320-365-20-1

LIST OF ILLUSTRATIONS (CONT)

Figure No.
Figure Title
Page

16-3. M1079 Van Body Interior Accessory Mounting Hardpoints
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-262
16-4. M1079 Van Body Interior Accessory Mounting Hardpoints
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-263

16-5. M1079 Van Body Interior Accessory Mounting Hardpoints
(Serial Numbers 001 through 190)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-265
16-6. M1079 Van Body Interior Accessory Mounting Hardpoints
(Serial Numbers 191 and Higher) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-266
17-1. 11K Self-Recovery Winch (SRW) Hydraulic Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-29
19-1. Hydraulic Manifold PN HFC32598 Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-11
19-1.1. Hydraulic Manifold PN 65234 Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-12
19-1.2. Air Transportability Hydraulic Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-54
23-1. Primary Air Supply Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-3
23-2. Central Tire Inflation System (CTIS) Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-5
23-3. Air Transportability Air Hose Locations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-9

E-1. Brake Adjusting Tool Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
E-2. Brake Plunger Seal Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
E-3. Cab Support Tool Strut and Cab Rest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-6
E-4. Cab Support Tool Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-7
E-5. Cab Support Tool Seat Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-8
E-6. Cab Support Tool Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
E-7. Headlight Adjustment Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-10
E-8. Lanyard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-17
E-9. CTIS Seal Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-19

E-10. Wheel Hub Grease Seal Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-20
E-11. Purge Valve Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-22

LIST OF TABLES

Table No.
Table Title
Page

1-1. Nomenclature Cross-Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2-1. Preventive Maintenance Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2-2. Vehicle Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
2-3. Engine System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
2-4. Fuel System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-101
2-5. Exhaust System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-119
2-6. Cooling System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-129
2-7. Electrical System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-147
2-8. Function to Circuit Breaker Cross Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-152

2-8.1. Circuit Breaker to Function Cross Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-152.3
2-8.2. Connector PX33 Ground Continuity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-249
2-8.3. Connector PX33 Continuity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-251
2-8.4. Speedometer Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-344.1
2-8.5. Speedometer Dip Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-345
2-9. Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-10. Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-11. Deleted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11.1. Cab Clearance and Marker Light Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-565
2-11.2. Cab Clearance and Marker Light Terminal Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-567

2-12. Side and Rear Marker Light Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-581

2-12.1. Side and Rear Marker Light Terminal Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-583

Change 1
v

TM 9-2320-365-20-1

LIST OF TABLES (CONT)

Table No.
Table Title
Page

2-13. Van Body Clearance/Marker Light Location and Connector Number
. . . . . . . . . . . . . . . . . . . . . . . . .
2-1107
2-14. M1079 Blackout Light Locations and Connector Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1225
2-15. M1079 Emergency Light Locations and Connector Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1233
2-16. Transmission System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1359
2-17. Transmission Sump Oil Temperature Sensor Resistance Readings . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1395
2-18. WTEC II Cab Transmission Harness Transmission Solenoid Test Points . . . . . . . . . . . . . . . . . . . . . .
2-1401
2-19. Connector P119 Transmission Solenoid Resistance Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1403
2-20. Transmission Solenoid Resistance Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1403
2-21. Main Code 43 Sub Code 21 and 26 High Side Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1405
2-22. Main Code 43 Sub Code 21 and 26 Low Side Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1407
2-23. Transmission Solenoid F and G Resistance Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1409
2-24. Sub Code Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1417
2-25. WTEC II Cab Transmission Harness Continuity Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1441
2-26. Off-Going Clutch Pressure Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1447
2-27. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1451
2-28. Off-Going Clutch Pressure Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1455
2-29. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1461
2-30. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1467
2-31. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1473
2-32. Transmission Sump Oil Temperature Sensor Resistance Readings . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1515
2-33. WTEC III Cab Transmission Harness Transmission Solenoid Test Points
. . . . . . . . . . . . . . . . . . . . .
2-1523
2-34. Connector P119 Transmission Solenoid Resistance Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1525
2-35. Transmission Solenoid Resistance Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1525
2-36. Sub Code Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1533
2-37. WTEC III Cab Transmission Harness Continuity Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1547
2-38. Off-Going Clutch Pressure Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1553
2-39. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1557
2-40. Off-Going Clutch Pressure Tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1561
2-41. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1567
2-42. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1573
2-43. Clutch Pressure Tap
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1579
2-44. Propeller Shaft Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1597
2-45. PTO Fault Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1603
2-46. Brake System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1607
2-47. Air System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1713
2-48. Wheel Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1753
2-49. Hydraulic System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1761
2-50. Central Tire Inflation System (CTIS) Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1767
2-51. Axle Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1895
2-52. Steering Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1903
2-53. Suspension System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1925
2-54. 11K Self-Recovery Winch (SRW) System Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1945
2-55. Steering Hydraulic System Fault Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1953
2-56. Air Transport Components Fault Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1959
2-57. Special Purpose Kit Fault Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1977
2-58. Cab Tilt and Spare Tire Retainer Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2115
2-59. Frame Fault Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2121
7-1. Power Distribution Panel (PDP) Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36.1
7-1.1. Power Distribution Panel (PDP) Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36.2
7-1.2. Electrical Gages Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-89

vi
Change 1

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LIST OF TABLES (CONT)

Table No.
Table Title
Page
7-2. Rocker Switch Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-90
7-3. M1081 Cab Clearance and Marker Light Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-230
7-4. Cab Clearance and Marker Light Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-245
8-1. WTEC II Diagnostic Code List and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-10
8-2. WTEC III Diagnostic Code List and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-15
11-1. Air Chamber Pressure Limits
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-60
11-2. Rear Brake Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-97
11-3. Rear Brake Control Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-99
11-4. Front Brake Air Hose Locations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11-101
16-1. M1079 Van Body Accessory Mounting Blind Rivet Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-259
16-2. M1079 Interior Field Telephone Binding Post Wire Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-315
16-3. M1079 24 VDC Binding Post Wire Numbers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-326
16-4. M1079 110 VAC Outlet Box Location and Wire Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-339
16-5. M1079 Blackout Switch Location and Wire Numbers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-368
16-6. M1079 Blackout/Emergency Light Locations and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-372
16-7. M1079 Clearance and Marker Lights Location and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-388
16-8. M1079 Circuit Breakers and Wire Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-418
16-9. M1079 Connector J173 Pin Letters and Wire Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16-474
17-1. 11K Self-Recovery Winch (SRW) Hydraulic Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17-29
19-1. Air Transportability Hydraulic Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19-54
23-1. Primary Air Supply Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-3
23-2. Central Tire Inflation System (CTIS) Air Hose Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-5
23-3. Air Transportability Air Hose Locations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23-9

E-1. Pneumatic Tube Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-13
E-2. Non-Metallic Electrical Cable Conduit Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-15
F-1. Dry Torque Limits for SAE and ANSI Screws and Free Spinning Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
F-2. Dry Torque Limits for SAE and ANSI Prevailing Torque Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
F-3. Dry Torque Limits for Metric Screws and Free Spinning Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5
F-4. Dry Torque Limits for Metric Prevailing Torque Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6
F-5. Wet Torque Limits for SAE and ANSI Screws and Free Spinning Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

HOW TO USE THIS MANUAL

OVERVIEW

This technical manual (TM) is provided to help you maintain the LMTV at the Unit Maintenance level. Because of its
size, it is divided into five volumes. Volumes 2, 3, 4, and 5 contain information which will assist you in the performance
of Unit Maintenance on the LMTV. Volume 1 contains the following major sections in order of appearance:

•
WARNING SUMMARY.
Provides a summary of the most important warnings that apply throughout the
manual.

•
TABLE OF CONTENTS. Lists, for all volumes, the chapters, sections, appendixes, and indexes with page
numbers in order of appearance.

•
CHAPTER 1, INTRODUCTION. Describes the LMTV and provides equipment data.

Change 1
vii

TM 9-2320-365-20-1

OVERVIEW (CONT)

•
CHAPTER 2, VEHICLE MAINTENANCE. This chapter contains information for finding tools; special tools;
test, measurement, and diagnostic equipment (TMDE); and repair parts.
It also contains the preventive
maintenance checks and services (PMCS) and troubleshooting tables.

•
APPENDIX A, REFERENCES. Lists publications used with the LMTV.

•
APPENDIX B, MAINTENANCE ALLOCATION CHART. The maintenance allocation chart denotes the level
of maintenance which performs specific maintenance tasks and the time required.
It also lists tools and
special tools required for each task.

•
APPENDIX C, TOOLS IDENTIFICATION LIST. Lists equipment used in the performance of maintenance
and references publications which contain information regarding the equipment.

•
APPENDIX D, EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. Lists expendable and durable
items used in the performance of maintenance.

•
APPENDIX E, ILLUSTRATED LIST OF MANUFACTURED ITEMS. Illustrates and describes items that must
be fabricated from bulk materials for repair of the LMTV.

•
APPENDIX F, TORQUE LIMITS. Lists the standard torque values for specific attaching hardware.

•
APPENDIX G, MANDATORY REPLACEMENT PARTS.

•
APPENDIX H, LUBRICATION ORDER.

•
APPENDIX J, ADDITIONAL AUTHORIZATION LIST (AAL).

•
APPENDIX K, TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART.

•
SUBJECT INDEX. Lists important subjects contained in volumes 1, 2, 3, 4, and 5 in alphabetical order and
gives the associated paragraph number.

Volume 2 contains the following major sections in order of appearance:

•
WARNING SUMMARY.
Provides a summary of the most important warnings that apply throughout the
manual.

•
CHAPTER 2, VEHICLE MAINTENANCE (CONT).

•
CHAPTER 3, ENGINE MAINTENANCE.

•
APPENDIX A, REFERENCES. Lists publications used with the LMTV.

•
APPENDIX B, MAINTENANCE ALLOCATION CHART. The maintenance allocation chart denotes the level
of maintenance which performs specific maintenance tasks and the time required.
It also lists tools and
special tools required for each task.

•
APPENDIX C, TOOLS IDENTIFICATION LIST. Lists equipment used in the performance of maintenance
and references publications which contain information regarding the equipment.

•
APPENDIX D, EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. Lists expendable and durable
items used in the performance of maintenance.

viii
Change 1

TM 9-2320-365-20-1

•
APPENDIX E, ILLUSTRATED LIST OF MANUFACTURED ITEMS. Illustrates and describes items that must
be fabricated from bulk materials for repair of the LMTV.

•
APPENDIX F, TORQUE LIMITS. Lists the standard torque values for specific attaching hardware.

•
APPENDIX G, MANDATORY REPLACEMENT PARTS.

•
APPENDIX H, LUBRICATION ORDER.

•
APPENDIX J, ADDITIONAL AUTHORIZATION LIST (AAL).

•
APPENDIX K, TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART.

•
SUBJECT INDEX.
Lists important subjects contained in volume 2 in alphabetical order and gives the
associated paragraph number.

Volume 3 contains the following major sections in order of appearance:

•
WARNING SUMMARY.
Provides a summary of the most important warnings that apply throughout the
manual.

•
CHAPTER 4, FUEL SYSTEM MAINTENANCE

•
CHAPTER 5, EXHAUST SYSTEM MAINTENANCE

•
CHAPTER 6, COOLING SYSTEM MAINTENANCE

•
CHAPTER 7, ELECTRICAL SYSTEM MAINTENANCE

•
CHAPTER 8, TRANSMISSION MAINTENANCE

•
CHAPTER 9, PROPELLER SHAFT MAINTENANCE

•
CHAPTER 10, FRONT AND REAR AXLE MAINTENANCE

•
CHAPTER 11, BRAKE SYSTEM MAINTENANCE

•
CHAPTER 12, WHEEL, TIRES, AND HUBS MAINTENANCE

•
CHAPTER 13, STEERING SYSTEM MAINTENANCE

•
CHAPTER 14, FRAME, TOWING ATTACHMENTS, AND DRAWBARS MAINTENANCE

•
CHAPTER 15, SUSPENSION SYSTEM MAINTENANCE

•
APPENDIX A, REFERENCES. Lists publications used with the LMTV.

•
APPENDIX B, MAINTENANCE ALLOCATION CHART. The maintenance allocation chart denotes the level
of maintenance which performs specific maintenance tasks and the time required.
It also lists tools and
special tools required for each task.

•
APPENDIX C, TOOLS IDENTIFICATION LIST. Lists equipment used in the performance of maintenance
and references publications which contain information regarding the equipment.

Change 1
ix

TM 9-2320-365-20-1

OVERVIEW (CONT)

•
APPENDIX D, EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. Lists expendable and durable
items used in the performance of maintenance.

•
APPENDIX E, ILLUSTRATED LIST OF MANUFACTURED ITEMS. Illustrates and describes items that must
be fabricated from bulk materials for repair of the LMTV.

•
APPENDIX F, TORQUE LIMITS. Lists the standard torque values for specific attaching hardware.

•
APPENDIX G, MANDATORY REPLACEMENT PARTS.

•
APPENDIX H, LUBRICATION ORDER.

•
APPENDIX J, ADDITIONAL AUTHORIZATION LIST (AAL).

•
APPENDIX K, TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART.

•
SUBJECT INDEX.
Lists important subjects contained in volume 3 in alphabetical order and gives the
associated paragraph number.

Volume 4 contains the following major sections in order of appearance:

•
WARNING SUMMARY.
Provides a summary of the most important warnings that apply throughout the
manual.

•
CHAPTER 16, BODY AND CAB MAINTENANCE

•
CHAPTER 17, 11K SELF-RECOVERY WINCH (SRW) MAINTENANCE

•
CHAPTER 18, BODY, CHASSIS, AND ACCESSORY ITEMS MAINTENANCE

•
CHAPTER 19, HYDRAULIC SYSTEM MAINTENANCE

•
APPENDIX A, REFERENCES. Lists publications used with the LMTV.

•
APPENDIX B, MAINTENANCE ALLOCATION CHART. The maintenance allocation chart denotes the level
of maintenance which performs specific maintenance tasks and the time required.
It also lists tools and
special tools required for each task.

•
APPENDIX C, TOOLS IDENTIFICATION LIST. Lists equipment used in the performance of maintenance
and references publications which contain information regarding the equipment.

•
APPENDIX D, EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. Lists expendable and durable
items used in the performance of maintenance.

•
APPENDIX E, ILLUSTRATED LIST OF MANUFACTURED ITEMS. Illustrates and describes items that must
be fabricated from bulk materials for repair of the LMTV.

•
APPENDIX F, TORQUE LIMITS. Lists the standard torque values for specific attaching hardware.

•
APPENDIX G, MANDATORY REPLACEMENT PARTS.

x
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TM 9-2320-365-20-1

•
APPENDIX H, LUBRICATION ORDER.

•
APPENDIX J, ADDITIONAL AUTHORIZATION LIST (AAL).

•
APPENDIX K, TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART.

•
SUBJECT INDEX.
Lists important subjects contained in volume 4 in alphabetical order and gives the
associated paragraph number.

Volume 5 contains the following major sections in order of appearance:

•
WARNING SUMMARY.
Provides a summary of the most important warnings that apply throughout the
manual.

•
CHAPTER 20, SPECIAL PURPOSE KITS MAINTENANCE

•
CHAPTER 21, ARMAMENT/SIGHTING AND FIRE CONTROL MATERIEL MAINTENANCE

•
CHAPTER 22, ELECTRICAL ILLUMINATING EQUIPMENT MAINTENANCE

•
CHAPTER 23, AIR SYSTEM MAINTENANCE

•
CHAPTER 24, GAGES (NON-ELECTRICAL) MAINTENANCE

•
APPENDIX A, REFERENCES. Lists publications used with the LMTV.

•
APPENDIX B, MAINTENANCE ALLOCATION CHART. The maintenance allocation chart denotes the level
of maintenance which performs specific maintenance tasks and the time required.
It also lists tools and
special tools required for each task.

•
APPENDIX C, TOOLS IDENTIFICATION LIST. Lists equipment used in the performance of maintenance
and references publications which contain information regarding the equipment.

•
APPENDIX D, EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST. Lists expendable and durable
items used in the performance of maintenance.

•
APPENDIX E, ILLUSTRATED LIST OF MANUFACTURED ITEMS. Illustrates and describes items that must
be fabricated from bulk materials for repair of the LMTV.

•
APPENDIX F, TORQUE LIMITS. Lists the standard torque values for specific attaching hardware.

•
APPENDIX G, MANDATORY REPLACEMENT PARTS.

•
APPENDIX H, LUBRICATION ORDER.

•
APPENDIX J, ADDITIONAL AUTHORIZATION LIST (AAL).

•
APPENDIX K, TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART.

•
SUBJECT INDEX.
Lists important subjects contained in volume 5 in alphabetical order and gives the
associated paragraph number.

Change 1
xi

TM 9-2320-365-20-1

FINDING INFORMATION

There are several ways to find the information you need in this manual. They are as follows:

•
FRONT COVER INDEX. The front cover index contains a list of the most important topics contained in each
volume. It features a black box at the right edge of the cover which corresponds with a black box on the
page containing the topic. The topics listed on the front cover are highlighted in the table of contents with
a box.

•
TABLE OF CONTENTS. Lists chapters, sections, appendixes, and indexes with page numbers in order of
appearance.

•
CHAPTER INDEXES. List paragraphs contained in the individual chapters with paragraph and page numbers
in order of appearance.

•
SYMPTOM INDEX. Lists malfunctions contained in the troubleshooting table with page numbers in order of
appearance.

TROUBLESHOOTING

Troubleshooting is contained in chapter 2.
When a malfunction occurs, look at the symptom index for the vehicle
troubleshooting table in chapter 2.
Find the malfunction in the index.
Turn to the page number listed for the
malfunction in the troubleshooting table. Perform the steps required to correct the malfunction. If you can’t find the
malfunction, or the malfunction is not corrected, notify your supervisor.

MAINTENANCE

•
SCHEDULED MAINTENANCE.
Your scheduled maintenance is located in Table 2-1. Preventive
Maintenance Checks and Services.
These checks and services are mandatory at the intervals listed.
Always follow the WARNINGS and CAUTIONS.

•
UNSCHEDULED MAINTENANCE. Unscheduled maintenance is located in chapters 3 through 24. The
PMCS and troubleshooting tables often reference you to these procedures. When you perform maintenance,
look over the entire procedure before starting. Make sure you have the necessary tools and materials at
hand. Always follow the WARNINGS and CAUTIONS.

FOLLOW THESE GUIDELINES WHEN USING THIS MANUAL:

•
Become familiar with the entire maintenance procedure before beginning a maintenance task.

•
Read all WARNINGS and CAUTIONS before performing any procedures.

xii
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CHAPTER 1
INTRODUCTION

Page
Section I. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2. MAINTENANCE FORMS, RECORDS, AND REPORTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-3. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-4. OFFICIAL NOMENCLATURE, NAMES AND DESIGNATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-5. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR) . . . . . . . . . . . . . . . . . . . . 1-6
1-6. WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Section II. EQUIPMENT DESCRIPTION AND DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-7. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-9. DIFFERENCES BETWEEN MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Section III. PRINCIPLES OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-10. POWERTRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-11. ENGINE AIR INTAKE SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1-12. FUEL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-10
1-13. COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-12
1-14. ELECTRICAL SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-14
1-15. BRAKE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-20
1-16. STEERING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-22
1-17. 11K SELF-RECOVERY WINCH (SRW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-23
1-18. AIR TRANSPORTABILITY HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-24
1-19. AIR SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-26

Section I. GENERAL INFORMATION

1-1. SCOPE

This chapter provides general information, equipment description, and principles of operation for the M1078 series Light
Medium Tactical Vehicle (LMTV). The LMTV will herein be referred to as the vehicle.

a. Type of Manual: Unit Support Maintenance Instructions, TM 9-2320-365-20-1.

b. Model Numbers and Equipment Names. The vehicle model numbers and names are listed below:

M1078
Truck, Cargo: 2 1/2-Ton, 4x4, Dropside (Figure 1-1).
M1079
Truck, Van: 2 1/2-Ton, 4x4 (Figure 1-2).
M1080
Truck, Chassis: 2 1/2-Ton, 4x4 (Figure 1-3).
M1081
Truck, Cargo: 2 1/2-Ton, 4x4, Dropside, AIR DROP (Figure 1-4).

c. Purpose of Equipment. The LMTV series is a family of 4x4 wheeled vehicles. The purpose of these vehicles
is as follows:

(1) M1078 - Cargo hauling vehicle; can be outfitted for troop transport when equipped with a troopseat kit.
(2) M1079 - Van; can be outfitted with communications equipment or shop equipment.
(3) M1080 - Vehicle chassis; this chassis will accept a cargo bed or may be modified for special missions.
(4) M1081 - Cargo hauling vehicle; can be airdropped and outfitted for troop transport when equipped with a troopseat
kit.

1-1

TM 9-2320-365-20-1

1-1. SCOPE (CONT)

LEFT FRONT VIEW

RIGHT REAR VIEW

Figure 1-1. M1078 Truck, Cargo: 2 1/2-Ton, 4x4, Dropside

1-2

TM 9-2320-365-20-1

LEFT FRONT VIEW

RIGHT REAR VIEW

Figure 1-2. M1079 Truck, Van: 2 1/2 Ton, 4x4

1-3

TM 9-2320-365-20-1

1-1. SCOPE (CONT)

LEFT FRONT VIEW

RIGHT REAR VIEW

Figure 1-3. M1080 Truck, Chassis: 2 1/2-Ton, 4x4

1-4

TM 9-2320-365-20-1

LEFT FRONT VIEW

RIGHT REAR VIEW

Figure 1-4. M1081 Truck, Cargo: 2 1/2-Ton, 4x4, AIR DROP

1-5

TM 9-2320-365-20-1

1-2. MAINTENANCE FORMS, RECORDS, AND REPORTS

Department of the Army forms and procedures used for equipment maintenance will be those prescribed by (as
applicable) DA Pam 738-750. The Army Maintenance Management Systems (TAMMS); DA Pam 738-751, Functional
Users Manual for the Army Maintenance Management Systems; or AR 700-138. Army Logistics Readiness and
Sustainability.

1-3. DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE

Command decision, according to the tactical situation, will determine when the destruction plan of the M1078 vehicles
will be accomplished. A destruction plan will be prepared by the using organization unless one has been prepared by
a higher authority.
For general destruction procedures for this equipment, refer to TM 750-224-6, Procedures for
Destruction of Tank-Automotive Equipment to Prevent Enemy Use (U.S. Army Tank-automotive and Armaments
Command).

1-4. OFFICIAL NOMENCLATURE, NAMES AND DESIGNATIONS

Table 1-1 lists the nomenclature cross-reference used in this manual.

Table 1-1. Nomenclature Cross-Reference

Common Name
Official Nomenclature

Cold Start System
Ether Quick-Start System
Engine Coolant
Antifreeze, Ethylene, Glycol, Inhibited
Gladhand
Quick-Disconnect Coupling
Vehicle
Light Medium Tactical Vehicle (LMTV)

1-5. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)

If your Light Medium Tactical Vehicle (LMTV) needs improvement, let us know. Send us an EIR. You, the user, are
the only one who can tell us what you don’t like about your equipment. Let us know why you don’t like the design. Put
it on an SF 368 (Quality Deficiency Report). Mail it to us at: Commander, U.S. Army Tank-automotive and Armaments
Command, ATTN: AMSTA-TR-E/FMTV/312, Warren, MI 48397-5000. We’ll send you a reply.

1-6. WARRANTY INFORMATION

Refer to M1078 Series Warranty Program Technical Bulletin, TB 9-2300-365-15, for complete warranty information
covering the vehicle.
Warranty starts on the date found in block 23, DA Form 2408-9, in the logbook.
Report all
defects in material or workmanship to your supervisor, who will take appropriate action.

Section II. EQUIPMENT DESCRIPTION AND DATA

1-7. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES

Refer to TM 9-2320-365-10 for equipment characteristics, capabilities, and features.

1-6

TM 9-2320-365-20-1

1-8. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS

Refer to TM 9-2320-365-10 for location and description of major components.

Section III. PRINCIPLES OF OPERATION

1-10. POWERTRAIN

Figure 1-5. Powertrain

Power for the vehicle is provided by a diesel engine (1, Figure 1-5) which is coupled directly to an automatic
transmission (2). Power from the automatic transmission is transferred to the transfer case (3) and on to the front
steering and rear drive axles (4 and 5) through a series of drive shafts and universal joints. The vehicle drive train is
enhanced by the use of an electronically controlled seven-speed transmission. The primary components of the Allison
MD3070PT transmission consist of a control module located directly beneath the transmission main housing; a Throttle
Position Sensor (TPS) which detects the percentage of throttle being used; and engine, turbine, and output speed
sensors which, in combination with each other, send information to the transmission ECU to provide the smoothest
possible shifting and allow the transmission ECU to monitor overall transmission performance.
Transmission shift
control is provided by one of two types of pushbutton shift selectors: The WTEC II Transmission ECU Pushbutton Shift
Selector (TEPSS) which contains an integral transmission ECU or the WTEC III Transmission Pushbutton Shift Selector
(TPSS) which is coupled to an external transmission ECU.

1-7

1-9. DIFFERENCES BETWEEN MODELS

Refer to TM 9-2320-365-10 for differences between models.

TM 9-2320-365-20-1

1-10. POWERTRAIN (CONT)

Figure 1-5. Powertrain (Cont)

a.
Engine. The vehicle is equipped with a Caterpillar diesel engine, model 3116 ATAAC (Air-to Air After Cooler) (1,
Figure 1-5), rated at 225 HP.

b.
Transmission. The vehicle is equipped with an Allison automatic transmission, model MD3070PT (2, Figure 1-5).
It is a fully automatic electronically controlled seven-speed close-ratio transmission.

(1) The TEPSS contains microprocessor based electronics, and is located in the instrument panel to the driver’s left.
The TPSS is located in the instrument panel to the driver’s left, while the transmission ECU is located behind the kick
panel.
The ECU receives information, in the form of electrical signals from the various sensors, processes that
information, then sends the appropriate signals to the solenoids which control transmission function.
The ECU
incorporates a diagnostic program which enables it to identify numerous actual and/or potential transmission
problems.
The TEPSS and TPSS are capable of displaying diagnostic codes in the Light Emitting Diode (LED)
display on the pushbutton shift selector.
These diagnostic codes are stored in the ECU for later retrieval.
The
pushbutton shift selector is used for selecting transmission range. The transmission defaults to Neutral (N) whenever
electrical power is removed from the vehicle. The Drive (D) gear selection is used for normal driving conditions. The
transmission will engage 2nd gear when D is selected and the vehicle is stopped. As the accelerator is depressed
and speed increases, the transmission will automatically upshift through 3rd, 4th, 5th, 6th, and 7th gears. Low gear
(1st gear), is available only by manual selection.
Selecting a specific gear; for example, 3rd; will prevent the
transmission upshifting past the selected gear. This is useful if road or load conditions require lower gear range
operation. When road conditions improve or load is reduced, the shift selector can be returned to the normal (D)
driving position. When electrical power is applied to the TEPSS and a fault is detected in the transmission controls,
the TEPSS will emit an eight second series of beeps. When electrical power is applied to the TPSS and a fault is
detected in the transmission controls, "--" will appear in the TPSS LED display. In either case, the transmission will
not engage a range (forward or reverse) when D or Reverse (R) range is selected on the pushbutton shift selector.
TM 9-2320-365-10 provides full operating instructions for the transmission.

(2) The transmission may include a Power Take-Off (PTO). The PTO powers a hydraulic pump which supplies
hydraulic pressure for an 11K self-recovery winch (SRW).

1-8

TM 9-2320-365-20-1

c.
Transfer Case. The transfer case (3, Figure 1-5) provides the transmission (2) with the seventh gear (low gear,
or 1st gear) and delivers power from the transmission to the front and rear driveshafts. In normal driving conditions,
the transfer case splits the output torque of the transmission, providing 70 percent of the torque to the rear output drive
yoke and 30 percent to the front output drive yoke. In low gear the output torque of the transmission is split evenly,
with 50 percent going to the front output yoke and 50 percent going to the rear.

d.
Suspension. The suspension system is designed to maintain tire/ground contact in all types of terrain. the vehicle
is equipped with 395/85R20 tires. The tires have a tread pattern designed to maximize traction on all types of terrain.

e.
Axles. Front and rear axles (4 and 5, Figure 1-5) feature wheel end planetary drives designed to allow the vehicle
to carry heavy loads. When the vehicle is operated in MODE, all axles become driving axles. When the vehicle is
operated in MODE, 7th gear is unavailable.

1-11. ENGINE AIR INTAKE SYSTEM

Figure 1-6. Engine Air Intake System

The engine air intake system consists of a dry-type air cleaner (1, Figure 1-6), turbocharger (2), and a charge air cooler
(3). The turbocharger increases engine horsepower by delivering a higher volume of air to the engine. Engine exhaust
gases flow through the turbocharger, causing a turbine wheel to spin. As the turbine wheel spins, a compressor wheel
on the opposite end of the turbine wheel shaft spins and draws fresh air through the air cleaner. The compressor wheel
compresses the air and delivers it to the charge air cooler. The air flows through the charge air cooler which cools the
air before it is delivered to the engine cylinders. The charge air cooler allows a denser charge of air to be delivered
to the engine, which also aids in increasing engine horsepower.

1-9

TM 9-2320-365-20-1

1-12. FUEL SYSTEM

Figure 1-7. Fuel System

The primary components of the fuel system are the fuel tank (1, Figure 1-7), fuel priming pump and fuel/water separator
(2), fuel shutoff solenoid (3), engine fuel governor (4), and secondary fuel filter (5). The mechanical fuel pump acts
as an engine priming feature. The fuel/water separator removes water and large solid particles from the fuel before
it is passed to the engine fuel governor. The fuel shutoff solenoid, when energized, frees the governor output shaft
to move to the FUEL ON position. When electrical power is removed from the fuel shutoff solenoid, the governor output
shaft is locked in the FUEL OFF position.
The engine fuel governor contains a mechanical link to the fuel control
linkage and fuel transfer pump. The engine fuel governor responds to input from the accelerator pedal and causes the
fuel control rack to rotate, resulting in an increase or decrease in engine speed. The governor adjusts the amount of
fuel delivered to the engine as engine speed changes. The secondary fuel filter removes finer particles from the fuel
before it reaches the cylinder head. A fuel pressure regulator redirects excess fuel, through a fuel return hose, back
to the fuel tank.

1-10

TM 9-2320-365-20-1

Figure 1-7. Fuel System (Cont)

Additionally, the vehicle is equipped with an ether quick start system designed for starting the engine when ambient
temperatures are below 32°F (0°C). The ether quick start system is composed of an ether cylinder (6), ether valve (7),
two ether nozzles (8), and an ether sensor switch (9). The ether sensor switch detects the temperature of the engine
coolant and disables the ether valve above 32°F (0°C). The ether valve delivers a controlled charge of ether to the
ether nozzles.

1-11

TM 9-2320-365-20-1

1-13. COOLING SYSTEM

Figure 1-8. Cooling System

a.
Cooling System.
The pressurized cooling system protects the engine, transmission, and air compressor by
providing a means of dissipating heat generated during operation of the vehicle. The radiator pressure cap (1, Figure
1-8), in combination with the ethylene glycol-based antifreeze, effectively raises the boiling point of the coolant to well
above 212°F (100°C). The thermostat (2), located in a housing on the right side of the engine, helps the engine to
warm up quickly by remaining closed until the coolant temperature reaches approximately 180°F (82°C). When the
coolant reaches 199°F (93°C), the thermostat is fully open and coolant is circulated through the water jackets in the
engine to maintain the correct operating temperature for the engine. Coolant is drawn from the radiator (3), through
the transmission oil cooler (4), and circulated throughout the cooling system by the water pump (5). The water pump,
located on the front of the engine toward the right side, is driven by two V-belts from the crankshaft pulley.

1-12

TM 9-2320-365-20-1

Figure 1-8. Cooling System (Cont)

An engine fan (6) with pneumatic clutch is activated by the water temperature switch (7). When this switch detects a
high temperature condition, air pressure is removed from the fan clutch and the engine fan is engaged. Excess heat
is drawn from the radiator by the flow of air created by the engine fan over the radiator cooling fins. A radiator overflow
tank (8) is provided to allow for expansion of the coolant. The radiator overflow tank also serves as the point where
new coolant is introduced into the cooling system.

1-13

TM 9-2320-365-20-1

1-14. ELECTRICAL SYSTEM

Figure 1-9. Electrical System

In the Electrical System, a heavy duty starting motor (1, Figure 1-9) is mounted on the engine flywheel housing and
provides the cranking power necessary for starting the engine. The voltage regulator (2) maintains both a 14- and 28-
volts level for proper battery charging.
The alternator (3) provides sufficient amperage to operate all electrical
components and charge the batteries during engine idling. Vehicle exterior lights are mounted in protective locations
or are protected to prevent damage. Protection is provided for lights during cross country travel. Polycarbonate lenses
are provided for all lights except the sealed beam headlights. The electrical system supplies all of the electrical power
needed to operate the vehicle and trailer. The complete Electrical System is made up of the following subsystems:

• Power Storage and Generating
• Accessory Lighting
• Engine Starting and Stopping
• Instruments
• Service Lighting
• Indicator Lights and Alarm
• Blackout Lighting
• Troubleshooting Aid

a. Power Storage and Generating. Power storage for the vehicle consists of four 12-volt batteries. The four batteries
are divided into two sets. Two batteries in each set are wired in parallel to produce higher amperage. The two sets
are then wired in series to produce 24 volts Direct Current (DC). While the batteries can power all of the systems for
a limited time, their primary purpose is to supply power to the engine starting system. Once the engine is running, the
generating system provides electrical power for all of the systems. The engine driven alternator generates Alternating
Current (AC) which is passed through a set of rectifiers that change it into DC current. This DC current is used to
charge the batteries and is distributed to the electrical sub-systems of the vehicle.
The voltage regulator adjusts
alternator output to fit the needs of the electrical system.

1-14

TM 9-2320-365-20-1

Figure 1-10. Engine Starting System.

b. Engine Starting and Stopping. The Engine Starting System uses the stored electrical energy of the batteries to
the turn the starting motor.
When the master power switch (1, Figure 1-10) is positioned to on and the starter
pushbutton switch (2) is depressed, electrical power passes through the starter pushbutton to the auxiliary starter
solenoid. The auxiliary starter solenoid draws electrical power directly from the batteries and sends it to the starting
motor solenoid. When the starting motor solenoid is energized, electrical power from the batteries is supplied to the
starting motor and the engine begins cranking. Positioning the master power switch to off stops the engine.

1-15

TM 9-2320-365-20-1

1-14. ELECTRICAL SYSTEM (CONT)

Figure 1-11. Service Lighting System

c. Service Lighting. The Service Lighting System includes the headlights (1, Figure 1-11), taillights (2), backup light
(3), and clearance and marker lights (4). They are energized by positioning the main light switch to the appropriate
position (TM 9-2320-365-10).

1-16

TM 9-2320-365-20-1

Figure 1-12. Blackout Lighting System

d.
Blackout Lighting.
The Blackout Lighting System includes the front blackout marker lights (1, Figure 1-12),
blackout drive light (2), rear blackout marker lights (3), and blackout stop lights (4). These lights are energized by
positioning the main light switch to the appropriate position (TM 9-2320-365-10).

e.
Accessory Lighting.
The accessory lighting on the vehicle is the warning light.
This circuit is energized by
positioning the appropriate switch (TM 9-2320-365-10) to on.

1-17

TM 9-2320-365-20-1

1-14. ELECTRICAL SYSTEM (CONT)

Figure 1-13. Instrument Panel

f. Instruments. The Instrument Panel includes all gages that provide the operator with information about vehicle
condition and operating status. The speedometer (1, Figure 1-13) receives electrical input from the WTEC II Vehicle
Interface Module (VIM) on vehicles equipped with WTEC II transmission controls. The speedometer receives electrical
input from the WTEC III transmission ECU on vehicles equipped with WTEC III transmission controls. The WTEC II
VIM and the WTEC III transmission ECU are both located behind the kick panel. Tachometer (2) input is provided by
the engine speed sensor located on the engine flywheel housing.
The fuel gage (3), oil pressure gage (4), water
temperature gage (5), front brake air pressure gage (6), rear brake air pressure gage (7), and volts gage (8) receive
electrical signals from sending units. The sending units respond to changes in fluid level, pressure, temperature, and
DC current and send this information to the gages.

1-18

TM 9-2320-365-20-1

g. Indicator Lights and Alarms. The lighted indicator display (9) and audible alarm (10), located on the instrument
panel assembly, are activated by switches located in various systems. These include, but are not limited to; master
stop, low engine oil pressure, low air pressure, high water temperature, engine fan off, and high transmission oil
temperature. When any of these switches are activated, they energize the proper indicator and/or alarm, alerting the
operator of a potential problem or condition which needs to be monitored.

Figure 1-14. Troubleshooting Aid

h. Troubleshooting Aid. A start inhibit switch (1, Figure 1-14), located on the Power Distribution Panel (PDP) (2),
is provided as a troubleshooting aid for the Unit and DS Maintenance levels and as a maintenance tool at the GS
Maintenance level to stop fuel flow at the fuel shutoff solenoid (3). By pressing the start inhibit switch first, the starter
pushbutton (4) can be pressed and the engine cranked without allowing the engine to be started. The start inhibit
switch is reset when the master power switch is positioned to off and then to on again.

1-19

TM 9-2320-365-20-1

1-15. BRAKE SYSTEM

Figure 1-15. Brake System

The vehicle is equipped with an air brake system which complies with the Federal Motor Vehicle Safety Standard
(FMVSS) 121.
The brake system is made up of a number of components including an air compressor, air dryer,
primary and secondary air tanks, and several valves which control the application and release of the brakes. The air
compressor (1, Figure 1-15) supplies approximately 120 psi (827 kPa) to the air dryer (2). The air dryer contains a
heating element and a desiccant cartridge to remove moisture from the air before it is delivered to the primary air tank
(3) and secondary air tank (4).

1-20

TM 9-2320-365-20-1

Figure 1-15. Brake System (Cont)

The foot control valve is operated by the brake pedal (5) and receives pressurized air from both the primary and
secondary air tanks. The foot control valve is a dual activation design, with one set of ports supplying air to the front
brakes from the secondary air tank and another set of ports supplying air to the rear brakes from the primary air tank.
The plumbing between the primary and secondary air tanks is designed to allow controlled braking in the event of a
failure in either the primary (rear brakes) or secondary (front brakes) brake circuit. Air from the foot control valve is
supplied to the load sensing valve (6) which, in turn, controls air delivery to the relay valve (7). The load sensing valve
is mounted on a crossmember and connected, by a spring and cable, to the rear axle. The arrangement of the load
sensing valve provides a mechanical anti-lock feature to the rear brakes by sending less air to the rear brakes when
the vehicle is not heavily loaded. The relay valve is used to provide the Operator with quicker brake response. An
inversion valve (8) redirects air from the secondary brake circuit to the primary brake circuit in case of loss of pressure
in the primary brake circuit. This feature allows control of the spring brakes and prevents early rear brake lock-up.

1-21

TM 9-2320-365-20-1

1-16. STEERING SYSTEM

Figure 1-16. Steering System

The vehicle is equipped with hydraulically-assisted power steering. The power steering pump (1, Figure 1-16) is driven
by a shaft at the rear of the air compressor. The steering gear box (2) is a recirculating ball design. The steering wheel
(3) is linked to the steering gear box by a shaft and two universal joints. The power steering pump supplies constant
hydraulic pressure to the steering gear box. The steering pitman arm (4) is attached to the left steering knuckle (5)
by the drag link (6). The left and right steering knuckles are connected to each other by the tie-rod (7). Turning the
steering wheel to the right causes the steering pitman arm to move toward the front of the vehicle and the front wheels
to turn right. Turning the steering wheel to the left causes the steering pitman arm to move toward the rear of the
vehicle and the front wheels to turn left. The tie-rod allows for front wheel toe-in adjustment.

1-22

TM 9-2320-365-20-1

1-17. 11K SELF-RECOVERY WINCH (SRW)

Figure 1-17. 11K Self-Recovery Winch (SRW)

When specified, the vehicle is equipped with an 11K Self-Recovery Winch (SRW) (1, Figure 1-17) mounted on the right
frame rail. The SRW is rated for 11,000 lbs (48,924 N) pull when the winch drum has one full layer of cable. One full
layer of cable is the minimum amount of cable that may be left on the drum when using the SRW. Pulling capacity is
reduced with each layer of cable that is added to the winch drum. Pulling capacity with seven full layers of cable on
the winch drum is 6,780 lbs (30,157 N). The SRW cable may be routed to the front or rear of the vehicle for recovery
operations. The SRW is equipped with a fail-safe brake which is spring applied and hydraulically released. The fail-
safe brake is automatically applied when hydraulic pressure falls below 270 psi (1,862 kPa). The fail-safe brake will
hold the load until hydraulic pressure is restored. The winch control valve functions as a throttling valve when cable
is being payed out. The winch control valve controls the flow of fluid to the winch motor. When cable is being pulled
in, the winch control valve acts as a free flow check valve. The winch control valve is preset at the factory and is not
to be adjusted under any circumstances.

1-23

TM 9-2320-365-20-1

1-18. AIR TRANSPORTABILITY HYDRAULIC SYSTEM

Figure 1-18. Air Transportability Hydraulic System

The entire series of M1078 vehicles is equipped with a hydraulic system which allows the vehicle to be prepared for
internal air transport in a short time by a minimum number of personnel. Air from the primary and secondary air tanks
(1 and 2, Figure 1-18) powers the air/hydraulic power unit (3). The air/hydraulic power unit supplies hydraulic power
to the rest of the system. The system is controlled by valves in the hydraulic manifold (4).

1-24

TM 9-2320-365-20-1

Figure 1-18. Air Transportability Hydraulic System (Cont)

Two suspension cylinders (4) mounted on the frame are used to compress the suspension so that the vehicle can be
loaded into an aircraft. Valves on the hydraulic manifold control pressure to the cab tilt cylinder (5); to raise and lower
the cab, and the spare tire retainer cylinder (6); to lower and raise the spare tire.

1-25

TM 9-2320-365-20-1

1-19. AIR SYSTEM

Figure 1-19. Air System

The air system provides clean, dry air for use in the air brake system and the Central Tire Inflation System (CTIS). The
air system is pressurized by an engine driven air compressor (1, Figure 1-19) with a nominal output pressure of 125
psi (862 kPa). The system pressure is controlled by an unloading type pressure governor (2) which maintains the
output pressure between 105 psi (724 kPa) and 125 psi (862 kPa). Air is supplied to the air brake portion of the air
system from the primary and secondary air tanks. Air for the CTIS comes from the wet tank (3) and is supplied to the
axles by the CTIS manifold valve (4). Air pressure in the tires is controlled by the CTIS Electronic Control Unit (ECU)
(5). The CTIS ECU provides for four tire pressure settings.

1-26

TM 9-2320-365-20-1

Figure 1-19. Air System (Cont)

Kneeling valves (6) on the front tires allow the front of the vehicle to be lowered for internal air transport. Quick release
valves (7) are provided for each axle to exhaust air from the CTIS when the Operator selects a mode which requires
a lower pressure setting. Air pressure is also used to keep the cab level through the use of air springs (8), mounted
below the rear cab support, and a cab leveling valve (9). The air system has enough reserve capacity to keep the
vehicle operational in the event of a partial system failure.

1-27/(1-28 Blank)

TM 9-2320-365-20-1

CHAPTER 2
VEHICLE MAINTENANCE

Section I. REPAIR PARTS, TOOLS, SPECIAL TOOLS, TEST, MEASUREMENT, AND DIAGNOSTIC
EQUIPMENT (TMDE), AND SUPPORT EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-1. COMMON TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-3. REPAIR PARTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Section II. SERVICE UPON RECEIPT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2-4. UNPACKING AND DEPROCESSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-5. HAND RECEIPT MANUAL AND INVENTORY OF EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-6. SERVICE BEFORE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
. . . . . . . . . . . . . . . . . . . . . 2-6.1

2-7. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION . . . . . . . . . . . 2-6.1
2-8. GENERAL MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6.2
2-9. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) TABLE . . . . . . . . . . . . . . . . . . . . 2-7

Section IV. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-53
2-10. INTRODUCTION TO LOGIC TREE TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-53
2-11. TROUBLESHOOTING INSTRUCTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-53
2-12. ENGINE SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-63
2-13. FUEL SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-101
2-14. EXHAUST SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-119
2-15. COOLING SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-129
2-16. ELECTRICAL SYSTEM TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-147

Volume 2

2-16. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1087
2-17. TRANSMISSION SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1359
2-18. PROPELLER SHAFT TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1597
2-19. POWER TAKE OFF (PTO) TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1603
2-20. BRAKE SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1607
2-21. AIR SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1713
2-22. WHEEL TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1753
2-23. HYDRAULIC SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1761
2-24. CENTRAL TIRE INFLATION SYSTEM (CTIS) TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . .
2-1767
2-25. AXLE TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1895
2-26. STEERING TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1903
2-27. SUSPENSION SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1925
2-28. 11K SELF-RECOVERY WINCH (SRW) SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . .
2-1945
2-29. STEERING HYDRAULIC SYSTEM TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1953
2-30. AIR TRANSPORT TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1959
2-31. SPECIAL PURPOSE KIT TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1977
2-32. CAB TILT AND SPARE TIRE RETAINER ASSEMBLY TROUBLESHOOTING . . . . . . . . . . . . . . .
2-2115
2-33. FRAME TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2121

Section V. MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2127
2-34. MAINTENANCE INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2127
2-35. GROUND HANDLING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2127
2-36. GENERAL REMOVAL INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2127
2-37. GENERAL DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2128
2-38. GENERAL CLEANING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2129

Change 1
2-1

TM 9-2320-365-20-1

CHAPTER 2

VEHICLE MAINTENANCE (CONT)

Section V. MAINTENANCE PROCEDURES (CONT)
2-39. GENERAL INSPECTION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2132
2-40. GENERAL REPAIR INSTRUCTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2132
2-41. GENERAL ASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2133
2-42. GENERAL INSTALLATION INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2134
2-43. PREPARATION FOR STORAGE OR SHIPMENT INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . .
2-2134
2-44. PREPARATION FOR STORAGE OR SHIPMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2135
2-45. STORAGE MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2135

Section I. REPAIR PARTS, TOOLS, SPECIAL TOOLS, TEST, MEASUREMENT,
AND DIAGNOSTIC EQUIPMENT (TMDE), AND SUPPORT EQUIPMENT

2-1. COMMON TOOLS AND EQUIPMENT

For authorized common tools and equipment, refer to the Modified Table of Organization and Equipment (MTOE), CTA
50-970, or CTA 8-100 as applicable to your unit.

2-2. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

For a listing of special tools, TMDE, and support equipment, refer to the Maintenance Allocation Chart (MAC), Appendix
B, of this manual and to the Repair Parts and Special Tools List (RPSTL), TM 9-2320-365-24P.

2-3. REPAIR PARTS

Mandatory replacement parts are listed in Appendix G. Repair parts are listed and illustrated in the RPSTL, TM 9-2320-
365-24P, covering Unit Maintenance repair parts and special tools for vehicle.

2-2
Change 1

TM 9-2320-365-20-1

Section II. SERVICE UPON RECEIPT

2-4. UNPACKING AND DEPROCESSING

WARNING

• Heavy objects/loads, such as tool boxes and heavy parts, must always be carried on the floor with
the weight distributed as equally as possible between left and right sides of M1079 van. Failure
to comply decreases the stability of the M1079 van and will increase the likelihood of a rollover.

• Heavy cabinets must always be mounted as low as possible with the weight distributed as equally
as possible between left and right sides of M1079 van. Remember to consider the weight of the
items that will be stored in the cabinets. Failure to comply decreases the stability of the M1079
van and will increase the likelihood of a rollover.

• Always keep in mind, when placing items inside the M1079 van, that heavier items must always
be positioned as low as possible and the weight distributed as equally as possible between left
and right sides of M1079 van. Failure to comply decreases the stability of the M1079 van and will
increase the likelihood of a rollover.

a. Unpacking. Upon receipt of a new vehicle, the receiving organization must see if it has been properly prepared
for service and is in good condition. Inspect all assemblies, subassemblies, and accessories to be sure they are in
proper working order (TM 9-2320-365-10). Secure, clean, and correctly adjust and/or lubricate as needed (Appendix
H). Check all tools and equipment to be sure every item is accounted for (TM 9-2320-365-10-HR) in good condition,
clean and properly mounted or stowed (TM 9-2320-365-10).

b.
Deprocessing. Read "Processing and Deprocessing Record of Shipping, Storage and Issue of Vehicles and
Spare Engines" tag, (DD Form 1397) and follow all precautions checked. This tag should be attached to the steering
wheel or manual throttle control lever.

2-5. HAND RECEIPT MANUAL AND INVENTORY OF EQUIPMENT

When a new vehicle is first received by the using organization, it is necessary to inventory the vehicle equipment. For
detailed procedures, refer to Hand Receipt Manual, TM 9-2320-365-10-HR.

2-6. SERVICE BEFORE OPERATION

a. General.

(1) Refer to TM 9-2320-365-10 for operating instructions for the vehicle.

(2) Upon receipt of a new, used, or reconditioned vehicle, the receiving organization must see if it has been properly
prepared for service and is in good condition (TM 9-2320-365-10).
Inspect all assemblies, subassemblies, and
accessories to be sure they are in proper working order. Secure, clean, correctly adjust, and/or lubricate (TM 9-2320-
365-10 and Appendix H) as needed. Check all tools and equipment to be sure every item is there (TM 9-2320-365-10-
HR), in good condition, clean and properly mounted or stowed (TM 9-2320-365-10).

(3) Follow general procedures for all services and inspections given in TM 9-2320-365-10.

Change 1
2-3

TM 9-2320-365-20-1

2-6. SERVICE BEFORE OPERATION (CONT)

b.
Inspection and Servicing Equipment.

NOTE

If vehicle has been driven to the using organization, most or all of the following work should have been
done.

(1) When vehicle is received, inspect all items for damage that may have occurred during shipping and unloading
operations. Pay close attention to any loose or missing nuts, bolts, screws, access plates, drain plugs, draincocks, oil
plugs, assemblies, subassemblies, or components that may be easily lost or broken in transit. Check Basic Issue Items
(BII) against checklist to make sure all items are accounted for and are in good condition (TM 9-2320-365-10-HR).
Carefully list all discrepancies.

WARNING

• Dry Cleaning Solvent P-D-680 is TOXIC and flammable. Wear protective goggles and gloves; use
only in well-ventilated area; avoid contact with skin, eyes, and clothes, and do not breathe vapors.
Keep away from open flame. Never smoke when using solvent; the flashpoint for Type I Dry
Cleaning Solvent is 100°F (38°C) and for Type II is 130°F (50°C). Failure to comply may result in
serious injury or death to personnel.

• If personnel become dizzy while using Dry Cleaning Solvent, immediately get fresh air and medical
help.
If solvent contacts skin or clothes, flush with cold water.
If solvent contacts eyes,
immediately flush eyes with water and get immediate medical attention. Failure to comply may
result in injury to personnel.

(2) Clean all exterior surfaces coated with rust-preventive compound with Dry Cleaning Solvent (Item 71, Appendix
D).

(3) Perform the Semiannual Preventive Maintenance Checks and Services (PMCS), Table 2-1.

(4) Lubricate all points shown in Appendix H regardless of interval. Schedule services in accordance with DA Pam
738-750.

(5) Initial Service Intervals:
a. Initial 500 miles (805 km) of operation:
(1) Perform Front and Rear Axle oil change.
(2) Perform Front Axle Wheel end Planetary Hub oil change.

b. Initial 1,000 miles (1,609 km) of operation:
Tighten self-locking nuts on leaf spring U-bolt to 390-510 lb-ft (529-692 N·m), in 50 lb-ft (68 N·m) increments, in a
crisscross pattern.

c. Initial 5,000 miles (8,045 km) of operation:
(1) Perform Engine oil and filter change.
(2) Perform Transmission oil and filter change.

(6) Activate battery if vehicle is delivered with dry-charged battery (TM 9-6140-200-14).

2-4
Change 1

TM 9-2320-365-20-1

WARNING

Do not remove radiator cap when the engine is hot; steam and hot coolant can escape and burn
personnel.

(7) Check radiator coolant. Check if solution is adequate for expected climatic conditions. Refer to TB 750-651 for
preparation of antifreeze solutions. Put tag near filler cap with type of antifreeze and degree of protection written
on tag.

c. Special Service Instructions.

(1) Vehicle Body and Sheet Metal Inspection (TM 9-2320-365-10).

(a) Inspect body and sheet metal for evidence of damage during shipment.

(b) Check doors, latches, and hinges on compartments for proper operation.

(c) Check mounting hardware and tighten as necessary.

(2) Vehicle Cab Inspection (TM 9-2320-365-10).

(a) Inspect cab for evidence of damage during shipment.

(b) Inspect windshields and window glass for cracks or other damage.

(c) Check door latches, hinges, and windows for proper operation.

(d) Check seats and seatbelts mounting hardware to ensure they are securely installed and tighten as
necessary.

(e) Check operator’s seat adjustments to ensure they are functioning properly.

(f) Unpin cab air springs, stow retaining pins, and inflate cab air springs (TM 9-2320-365-10, Preparation
for Internal Air Transport).

(3) Engine Inspection (TM 9-2320-365-10).

(a) Inspect engine and cooling hose connections for evidence of leakage.

(b) Remove any seals, plugs, or tape used to seal air inlets and ports on the engine during shipping.

(c) Check crankcase oil level with dipstick.

(d) Examine air cleaner element for dirty or restricted condition.

(e) Check for obstructions to cooling air flow to radiator.

(4) Transmission Inspection (TM 9-2320-365-10).

(a) Check fluid level with dipstick.

(b) Check external tubes and hoses for evidence of leakage.

Change 1
2-5

TM 9-2320-365-20-1

2-6. SERVICE BEFORE OPERATION (CONT)

(5) Transfer Case Inspection (TM 9-2320-365-10).

(a) Check level of lubricant at fill plug.

(b) Inspect lubrication pump and external hoses for evidence of leakage.

(c) Operate driveline control and observe drive power to front axle.

(d) Inspect bolts on driveline U-joints.

(6) Electrical System Inspection (TM 9-2320-365-10).

(a) Inspect battery cable connections and clean and tighten as necessary.

(b) Check all lights for burned out lamps, loose connections, and dirty or broken lenses.

(c) Check that alternator is charging batteries properly.

(d) Check that all electrical equipment functions properly.

(7) Air System Inspection (TM 9-2320-365-10).

(a) Drain any water from reservoirs.

(b) Inspect all accessible air hose and tubing connections for leakage.

(8) Steering System Inspection (TM 9-2320-365-10).

(a) Check steering hydraulic reservoir for proper fluid level.

(b) Examine steering linkage and steering gear for damage incurred during shipment.

(c) Examine steering hoses and connections for evidence of leakage.

(d) Check steering system for proper operation during road test.

(9) Chassis and Front and Rear Axle Inspection (TM 9-2320-365-10).

(a) Check all lubricant levels.

(b) Check axle housing pressure vents to ensure freedom from foreign matter.

(10) Tire Inspection.

(a) Check tire pressure (TM 9-2320-365-10).

(b) Inspect tires for serious cuts, bubbles, cracks, bruises, dry-rot, foreign objects, or exposure of internal cords.
Remove foreign objects lodged between treads (TM 9-2320-365-10).

(c) Check all wheel mounting nuts for proper torque (para 12-4).

2-6
Change 1

TM 9-2320-365-20-1

(11) Fuel System Inspection (TM 9-2320-365-10).

(a) Check fuel level and replenish, if necessary.

(b) Inspect fuel lines, connections, and filters for evidence of leakage.

Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

2-7. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION

This section contains Unit Maintenance PMCS requirements for the vehicle. The PMCS table contains checks and
services necessary to ensure the vehicle is ready for operation. Using the PMCS table, perform maintenance at the
specified intervals. Perform preventive maintenance checks and services in TM 9-2320-365-10 before doing the Unit
preventive maintenance.

2-8. GENERAL MAINTENANCE PROCEDURES

WARNING

•
Dry Cleaning Solvent P-D-680 is TOXIC and flammable. Wear protective goggles and gloves;
use only in well-ventilated area; avoid contact with skin, eyes, and clothes, and do not breathe
vapors. Keep away from open flame. Never smoke when using solvent; the flashpoint for Type
I Dry Cleaning Solvent is 100°F (38°C) and for Type II is 130°F (50°C). Failure to comply may
result in serious injury or death to personnel.

•
If personnel become dizzy while using Dry Cleaning Solvent, immediately get fresh air and
medical help.
If solvent contacts skin or clothes, flush with cold water.
If solvent contacts
eyes, immediately flush eyes with water and get immediate medical attention. Failure to comply
may result in injury to personnel.

a.
Cleanliness. Dirt, grease, oil, and debris only get in the way and may cover up a serious problem. Use Dry
Cleaning Solvent (Item 71, Appendix D) on metal surfaces and soapy water on rubber.

b.
Bolts, Nuts, and Screws.
Check bolts, nuts, and screws for obvious looseness, missing, bent, or broken
condition and replace as necessary. If they cannot be checked with a tool, look for chipped paint, bare metal, or rust
around bolt heads.

c.
Welds. Look for loose or chipped paint, rust, or gaps where parts are welded together. If a bad weld is found,
notify your supervisor.

d.
Electric Wires and Connectors.
Look for cracked or broken insulation, bare wires, and loose or broken
connectors. Tighten loose connectors and ensure wires are in good shape.

e.
Fluid Lines and Fittings. Look for wear, damage, and leaks and make sure clamps and fittings are tight. Wet
spots show leaks, but a stain around a fitting or connector can mean a leak. If connector or fitting is loose, tighten it.
If something is broken or worn out, repair or replace per applicable procedure.

Change 1
2-6.1/(2-6.2 Blank)

TM 9-2320-365-20-1

f. Fluid Leakage. It is necessary to know how fluid leakage affects the status of fuel, oil, coolant and the hydraulic
systems. The following are definitions of the type/classes of leakage necessary to know in order to determine the status
of the vehicle. Learn, then be familiar with them and REMEMBER - WHEN IN DOUBT, NOTIFY THE SUPERVISOR!

CAUTION

Equipment operation is allowable with minor leakage (Class I or II). Consideration must be given to the
fluid capacity in the item/system being checked/inspected. When in doubt, notify the supervisor. When
operating with Class I or II leaks, continue to check fluid levels as required in the PMCS. Class III leaks
should be repaired per applicable procedure.

(1) Class I. Seepage of fluid as indicated by wetness or discoloration not great enough to form drops.

(2) Class II.
Leakage of fluid great enough to form drops but not enough to cause drops to fall from item being
checked/inspected.

(3) Class III. Leakage of fluid great enough to form drops that fall from the item being checked/inspected.

g.
Air System Components. Look for worn, damaged, or leaking components. Make sure clamps and fittings are
tight. If a leak comes from a loose fitting or connector, tighten it. If something is broken or worn out, either repair or
replace it.

h.
Damage. Damage is defined as any condition that affects safety or would make the vehicle unserviceable for
mission requirements.

2-9. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) TABLE

a. Do the SEMIANNUAL PREVENTIVE MAINTENANCE (Table 2-1) once every six months.

b.
Refer to the specified technical manuals for preventive maintenance for special purpose kits.

c. Always to the PREVENTIVE MAINTENANCE in the same order until it gets to be a habit. Once practiced, it
will be easy to spot anything wrong in a hurry. Perform the checks and services listed in Table 2-1 in the order listed.

d.
If something does not work, troubleshoot with instructions in Section IV.

e. If anything looks wrong and is too hard to fix, notify the supervisor.

f. When doing preventive maintenance, take along the tools and supplies needed to make all the checks,
including a clean cloth or two.

Change 1
2-7

TM 9-2320-365-20-1

2-9. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) TABLE (CONT)

g.
The following is a breakdown of the PMCS table:

(1)
Item number column. Checks and services are numbered in a logical order for moving around the vehicle.
The item number column is used a source of item numbers for the TM Number Column on DA Form 2404, Equipment
Inspection and Maintenance Worksheet, for recording results of the PMCS.

(2)
Items to be inspected. This column identifies the item to be inspected.

(3)
Procedures column. This column contains all the information required to do the check/inspection. Art is
integrated into the column to aid the user in identifying items. Whenever replacement parts or repair is recommended,
reference is made to the applicable maintenance instructions.

2-8
Change 1

TM 9-2320-365-20-1

Change 2
2-9

Table 2-1. Preventive Maintenance Checks and Services

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

ROAD TEST

Maintenance personnel will be with vehicle
operator during the road test.

NOTE

Perform the following during road test.

For road test, vehicle will be driven at least
five miles over different ground to give enough
time to detect any malfunctions.

1
Semiannual
Preservice
Checks
a. Notice if starter engages smoothly and turns
engine at normal cranking speed.
a. Starter
inoperative or
makes excessive
grinding sound.

b. Listen for unusual engine noise at idle, at
operating speeds, and under acceleration. Be
alert for excessive vibration and the smell of oil,
fuel or exhaust.

b. Engine knocks,
rattles or smokes
excessively.

c. Check for transmission response to shifting and
for smoothness of operation in all speed ranges.
Be alert for unusual noises and difficulty in
shifting in any speed range.

c. Transmission
shifts improperly,
does not shift or
makes excessive
noises.

d. Test for accelerator response. Observe for
sticking pedal.
d. Pedal sticking
or binding.

e. With vehicle speed approximately 5 mph (8 kph)
turn steering wheel to left, then right, to detect
steering backlash, shimmy or freeplay of more
than 1-1/2 in. (38 mm) in either direction. Vehicle
should respond instantly. With vehicle moving on
straight, level terrain, lightly hold steering wheel
to check for pull and wandering.

e. Steering binds,
grabs, wanders or
freeplay is more
than 1-1/2 in. (38
mm) in either
direction.

TM 9-2320-365-20-1

2-10
Change 2

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

1 Semiannual
Preservice
Checks
(CONT)

NOTE

Do not turn tires when turning wheel to check for
steering wheel free play.

f. Place a strip of tape around steering wheel at
12 O'clock position. Turn steering wheel right
until resistance is felt. Place a ruler lightly
against outer rim of steering wheel with end of
ruler at one edge of tape. Turn steering wheel
left until resistance is felt. Measure distance
designated edge of tape has traveled. Maximum
free play measured at outside rim of steering
wheel is 2-1/2 in. (64 mm).

f. Steering wheel
exceeds 2-1/2 in.
(64 mm) free play.

g. Apply brake pedal with steady force. Vehicle
should slow down and stop without pulling to
one side or jerking. Release brake pedal. The
brakes should release immediately and without
difficulty.

g. Brakes chatter,
pull to one side,
will not release, or
do not work.

h. Observe vehicle response to road shocks, side
sway or continuous bouncing indicates a
malfunction.

h. Handling is
unstable.

Do not hold steering wheel at full left or right
position for longer than 10 seconds. Oil
overheating and pump damage can result.
Failure to comply may result in damage to
equipment.

i. With vehicle stopped, turn steering wheel to
extreme left, then to extreme right to check for
binding or jerking.

i. Hard steering is
evident.

j. Check engine operation at all speeds. Ensure
that engine does not go over engine governed
speed - (55 mph or 2600 rpm).

j. Engine exceeds
or fails to reach
governed speed.

CAUTION

TM 9-2320-365-20-1

Change 2
2-11

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

2
Semiannual
WHEELS,
HUBS,
AND CTIS
Completely deflate tires before removing
from axles only if there is obvious
damage to wheel components. Removing
damaged
tires
from
axles
without
deflating
tires
may
cause
wheel
components to separate. Failure to
comply may result in serious injury or
death to personnel.

a. Check wheels for obvious cracks around lug
holes. If cracks are found, repair wheel (para 12-
2).

a. Cracks are
found around lug
holes.

b. Replace any loose or damaged wheel studs (para
12-3). Tighten lugnuts (para 12-4).
b. More than one
lugnut or wheel
stud is damaged
or missing.

c. Check for oil leaks.
c. Class III leak is
evident.

d. Check wheels for CTIS air leaks.

e. Remove manifold valve (para 12-5) and inspect
manifold filter for damage. Clean any debris from
manifold filter.

WARNING

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

3
Semiannual
SERVICE
BRAKES
WARNING

•
Brake shoes may be covered with dust.
Breathing this dust may be harmful to
your health. Do not used compressed
air to clean brake shoes. Wear a filter
mask approved for use against brake
dust. Failure to comply may result in
injury to personnel.

•
Wear appropriate eye protection when
working under vehicle due to the
possibility of falling debris. Failure to
comply may result in injury to personnel.

a. Shut down engine (TM 9-2320-365-10) and
drain primary air tank. Rear service brakes
should not apply. If rear service brakes apply,
inversion valve is inoperative. Replace inversion
valve (para 11-12). If rear brakes are not
applied, depress brake pedal. Depressing brake
pedal should apply front brakes and control rear
spring brakes through inversion valve and
modulation of relay valve.

a. Rear portion of
brake system
fails.

2-12

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

3
Semiannual
SERVICE
BRAKES
(CONT)

b.
Inspect load sensing valve for signs of
corrosion.

c. Check security of mounting hardware.

d.
Check for air leaks around brake hose fittings.
d. Air leaks are
found.

e. Inspect control cable for corrosion and
abrasions.

e. Control cable
is damaged or
missing.

f.
Check security of control cable upper and
lower attaching hardware and adjust (para 11-
10).

g.
Inspect brake air chambers for obvious cracks
and corrosion.

g. Brake air
chamber leaks.

2-13

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

3
Semiannual
SERVICE
BRAKES
(CONT)

WARNING

Brake drums can become very hot during
vehicle operations. Place hand near drum
to check for excessive heat but do not
touch drum. Failure to comply may result
in injury to personnel.

CAUTION

Brake drum clearance must be checked
along centerline of brake shoe. Failure to
comply may result in damage to equipment.

NOTE

Over time a ridge will form on the outer edge
of the brake shoes. This is normal and does
not affect brake shoe serviceability.

h.
Examine and compare each brake drum for
evidence of overheating. Excessive heating of
brake drums may indicate a dragging brake
shoe. Cool brake drums could mean improper
adjustment, defective, or inoperative brakes, or
rust on braking surfaces.

h. Brake drums
are excessively
hot, cool, or
rusted.

2-14

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

3
Semiannual
SERVICE
BRAKES
(CONT)

i. Check brake lining to brake drum clearance
along centerline of shoe at scallop to ensure
automatic adjusters are functioning properly.
Clearance should be 0.020-0.040 (0.051-0.102
cm) maximum.

i. Brake shoe
adjustment is out
of tolerance.

WARNING

Do not allow grease or oil to contact
brake linings. Linings can absorb grease
and oil, causing early glazing and very
poor braking action. Failure to comply
may result in serious injury or death to
personnel.

j. Examine brake shoes for excessive brake lining
wear and cracking (para 11-2 and 11-3).

j. Brake linings
are cracked or
excessively worn.

k. Inspect brake shoe return springs and hold-
down clips for cracks.

k. Springs or
clips are cracked
or broken.

2-15

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

3
Semiannual
SERVICE
BRAKES
(CONT)

l.
Inspect actuator plunger seals for cuts, tears,
and leaks (para 11-4 and 11-5).

l. Plunger seals,
adjusting pawl
assembly,
adjusting plunger
or actuator are
damaged.

4
Semiannual
SHOCK
ABSORB-
ERS AND
SPRINGS

a.
Inspect shock absorbers for oil leaks and
damage.

a. Shock
absorber is bent
or leak greater
than class I is
evident.

b.
Check shock absorber mounting hardware for
security.

c.
Check rubber bushings for looseness which
may result in inner sleeve contacting eye ring
of shock absorber.

c. Rubber
bushings are
loose or inner
sleeve is
contacting eye
ring of shock
absorber.

2-16
Change 1

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked or
Serviced

Procedure
Not Fully
Mission
Capable If:

4
Semiannual
SHOCK
ABSORBERS
AND
SPRINGS
(CONT)

d.
Inspect spring leaves, spring clips, saddles,
saddle caps, and U-bolts for cracks or
breaks.

d. Cracks or
breaks are found.

5
Semiannual
AXLES
WARNING

Wear appropriate eye protection when
working under vehicle due to the possibility
of falling debris. Failure to comply may
result in injury to personnel.

Inspect axles for leaks around wheel end
assemblies, pinion seal, drive yoke, and drain
plug.

Class III leak is
evident.

Change 1
2-17

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked or
Serviced

Procedure
Not Fully
Mission
Capable If:

6
Semiannual
AXLE
BREATHER
VALVES

a. Inspect axle breather valves to ensure up and
down movement.

WARNING

Dry Cleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and
gloves; use only in well ventilated area; avoid contact with skin, eyes, and clothes, and do
not breathe vapors. Keep away from heat or flame. Never smoke when using solvent; the
flashpoint for Type I Dry Cleaning Solvent is 100°F (38°C) and for Type II is 130°F (50°C).
Failure to comply may result in serious injury or death to personnel.

If personnel become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If dry cleaning solvent contacts skin or clothes, flush with cold water. If dry
cleaning solvent contacts eyes, immediately flush eyes with water and get immediate
medical attention. Failure to comply may result in injury to personnel.

b.
Remove axle breather valve from fitting.
Wash breather in dry cleaning solvent (Item
71, Appendix D) and allow to air dry.

b. Axle breather
valve missing.

WARNING

Adhesives, solvents, and sealing compounds can burn easily, can give off harmful vapors, and
are harmful to skin and clothing. Keep away from open fire and use in well-ventilated area. If
adhesive, solvents, or sealing compound gets on skin or clothing, wash immediately with soap
and water. Failure to comply may result in injury to personnel.

c. Coat threads of axle breather valve with
antiseize compound (Item 14, Appendix D) and
install axle breather valve in fitting.

2-18

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked or
Serviced

Procedure
Not Fully
Mission
Capable If:

7
Semiannual
DRIVE
SHAFTS
WARNING

Wear appropriate eye protection when
working under vehicle due to the
possibility of falling debris. Failure to
comply may result in injury to personnel.

a. Inspect U-joints for play, broken and
missing lubrication fittings (Appendix H).

a. Lubrication
fittings, screws or
lock tabs are
broken or
missing, or play
is evident.

b.
Peform propeller shaft hinging inspection
(para 9-3).

b. Hinging
reading is greater
than 0.2 in. (.5
mm).

c. Inspect all drive shafts for damage or
obvious spline movement.

c. Damage or
obvious move-
ment evident.

Change 1
2-19

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked or
Serviced

Procedure
Not Fully
Mission
Capable If:

8
Semiannual
TRANS-
MISSION
WARNING

Wear appropriate eye protection when
working under vehicle due to the
possibility of falling debris. Failure to
comply may result in injury to personnel.

a. Check transmission for cracks, loose bolts,
leaks, and damage.

a. Cracks, loose
or missing bolts,
or Class III leaks.

b.
Check that transmission oil pan bolts and
drain plug are tight.

b. Oil pan bolts
or drain plug are
loose or missing.

c. Inspect transmission output shaft seal for
damage or leaks.

c. Damage or
Class III leaks
are evident.

2-20

TM 9-2320-365-20-1

Change 2
2-21

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

8
Semiannual
TRANS-
MISSION
(Cont)

d. Inspect transmission oil cooler tubes/hoses for
leaks.
d. Class III leak is
evident.

e. Inspect scavenge pump hose for leaks.
e. Class III leak is
evident.

9
Semiannual
ENGINE
MOUNTS

Check engine mounts for loose hardware or cracks.

Engine mounts
are loose or
damaged.

10
Semiannual
ENGINE
CRANK-
CASE

WARNING

Ensure engine is cool before performing
maintenance. Failure to comply may
result in injury to personnel.

Initial valve clearance adjustment on new
engines, rebuilt engines, or remanufactured
engines is required at initial 6,000 miles of
engine operation. The adjustment is
necessary due to the initial wear of the
valve train components and seating of the
valve train components. Notify DS
Maintenance if initial valve clearance
adjustment is required. Failure to comply
may result in damage to equipment.

CAUTION

TM 9-2320-365-20-1

2-22
Change 2

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

10
Semiannual
ENGINE
CRANK-
CASE
(Cont)

NOTE

a. Start engine (TM 9-2320-365-10) and run for five
minutes.

b. Check for oil leaks around top of engine oil filter.

c. Shut down engine (TM 9-2320-365-10).

d. Check oil level on engine oil dipstick.

e. Add engine oil, if required, to bring oil level to full
mark on engine oil dipstick.

COLD TEMPERATURE OPERATION

For operation of equipment in continuous
temperatures below 0 F (-18 C), remove
lubricants prescribed in the lubrication key
for temperatures above 0 F (-18 C).
Relubricate with lubricant specified in the
lubrication key for temperatures 0 F to
-50 F (-18 C to - 46 C).

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

10
Semiannual
ENGINE
CRANK-
CASE
(Cont)

f.
Check oil pan bolts and oil pan drain plug for
tightness.

h. Drain plug or
oil pan bolts are
loose or missing.

g.
Check valve cover for evidence of oil leaks.
i. Class III leak
is evident.

11
Semiannual
ENGINE
WIRING

Check all engine compartment wiring for frays,
splits, missing insulation or poor connections.

Insulation
missing. Frays,
splits, poor
connections
evident.

2-23

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

12
Semiannual
AIR
SYSTEM

a. Observe air dryer purge valve operation and
ensure proper functioning.

b.
Inspect purge valve seal for cracks and leaks.

c. Check wiring to heater portion of air dryer.
Ensure there are no loose connections or frayed
wires.

c. Loose
connection
cannot be
tightened or
frayed wires are
evident.

2-24

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

13
Semiannual
EXHAUST
SYSTEM
WARNING

The exhaust pipe and muffler can become
very hot during vehicle operation. Be
careful not to touch these parts with bare
hands, or allow body to come in contact
with pipe and muffler. Exhaust system
parts can become hot enough to cause
serious burns. Failure to comply may
result in injury to personnel.

a. Inspect exhaust manifold, exhaust pipes, muffler,
and tailpipe for corrosion, carbon deposits, loose
clamps, or leaking gaskets.

2-25

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

14
Semiannual
STABI-
LIZER BAR

a. Check rear stabilizer bar for secure mounting.

b.
Inspect stabilizer rubber bushings for cracks
and dry rot.

2-26

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

15
Semiannual
PINTLE
TOWING
HOOK

a. Check for free rotation and operation of pintle
towing hook.

b.
Inspect pintle towing hook and mounting plate
for cracks or loose hardware.

c. Inspect pintle cotter pin for presence.

2-27

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

16
Semiannual
VEHICLE
EXTERIOR

Inspect vehicle exterior for evidence of corrosion
damage such as surface color change, surface
separation, seam separation, blistered paint, rust
through, in accordance with TB 43-0213.

17
Semiannual
AIR
CLEANER

a. Remove air cleaner cover and examine air
cleaner cover gasket for dry rot and/or missing
sections.

a. Cover gasket
is not intact or
capable of
making a good
seal.

2-28

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

17
Semiannual
AIR
CLEANER
(CONT)

b.
Inspect air shutter by loosening one hose
clamp, removing cover, and ensuring air
shutter moves freely without binding or
resistance.

c. Inspect air shutter gasket for cracking and dry
rot.

b. Air shutter
binds or is stuck.

c. Gasket is
broken or dry
rotted.

d.
Check security of clamps on particle extraction
hose between air cleaner and tailpipe. Tighten
if loose (35-45 lb-in. (4-5 N·m)), replace if
broken. Examine particle extraction hose.
Replace if excessively worn.

d. Particle
extraction
pathway between
air cleaner and
tailpipe is not
intact.

2-29

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

18
Semiannual
BATTER-
IES AND
BATTERY
BOX

WARNING

• Remove or disconnect batteries prior to
performing maintenance in battery area or
when working on electrical system. Failure
to comply may result in severe electrical
shock to personnel or damage to
equipment.

• Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry contacts battery
terminal, a direct short may result in instant
heating of tools, damage to equipment, and
serious injury or death to personnel.
Failure to comply may result in serious
injury to personnel.

• Wear safety glasses or goggles when
checking batteries. Always check
electrolyte level with engine shut down. Do
not smoke or use exposed flame when
checking battery; explosive gases are
present and severe injury to personnel can
result. Failure to comply may result in
injury to personnel.

a. Inspect battery box for obvious signs of
corrosion and for loose mounting hardware.

2-30

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

18
Semiannual
BATTER-
IES AND
BATTERY
BOX
(CONT)

b.
Inspect external condition of batteries; check
for cracks and loose or corroded terminal
posts.

c. Check and record specific gravity of each cell in
all batteries.

b. Batteries
cracked.

d.
Inspect battery cables for corrosion, frays,
splits, chafing and secure attachment.

d. Battery cables
are worn, frayed
or corroded.

2-31

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

19
Semiannual
SPARE
TIRE
RETAINER

a. Inspect hydraulic hoses for cracks and
abrasions.

b.
Inspect hydraulic cylinder for leaks around
cylinder rod and fittings. Check cotter pins for
presence.

a. Class III leak
is evident.

b. Class III leak
is evident.

2-32

TM 9-2320-365-20-1

Change 2
2-33

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

20
Semiannual
CAB
HYDR-
AULIC
CYLINDER

a. Inspect cab hydraulic cylinder for leakage around
cylinder rod.

b. Check security of attaching hardware at cylinder
rod end and cotter pin for presence.

a. Class III leak is
evident.

b. Cab hydraulic
cylinder is
unsecured.

20a
Semiannual
CAB
RUBBER
BUMPER

Check cab rubber bumper for damage or excessive
wear.
If cab rubber
bumper is
damaged or worn.

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

21
Semiannual
CAB
HYDR-
AULIC
LATCH

Check security of attaching hardware for hydraulic
cab latch.

a. If cab will not
securely latch.

b. Missing or
loose hardware.

2-34

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

22
Semiannual
AIR/
HYDRAU-
LIC
POWER
UNIT

Check air/hydraulic power unit reservoir and refill in
accordance with Appendix H.

23
Semiannual
SUSPEN-
SION
CYLINDER

Check suspension cylinder for oil leaks and
damage.

Class III leak is
evident.

2-35

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

24
Semiannual
STEERING
SYSTEM

a. Inspect steering column universal joint
attachment hardware for security.

a. Universal joint
is loose, broken,
cracked, or hard-
ware is missing.

NOTE

Wheels must be centered before performing
step b.

b.
Inspect staking of pitman arm attachment nut.
b. Pitman arm
nut is loose.

c. Inspect power steering hoses for leaks, cracks,
and chafing.

c. Class III leak
is evident.
Chafing is severe
or hoses
cracked.

d.
Check steering gear mounting bolts for
tightness.

d. Bolts loose or
missing.

e. Check steering column U-joint, steering
knuckles, tie rod, drag link, pitman arm, and
steering gear for tightness, breaks, cracks, rust,
and serviceability.

e. Bolts are
loose. Breaks or
cracks are
evident.

2-36

TM 9-2320-365-20-1

Change 2
2-37

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

25
Semiannual
PULLEY
DAMPER
Inspect pulley damper for dents.
Pulley damper is
damaged.

26

27

28

Semiannual

Semiannual

Semiannual

ALTER-
NATOR
PULLEY

ALTER-
NATOR
BRACK-
ETS

ALTER-
NATOR
DRIVE
BELTS

Inspect alternator pulley for dents, nicks, and cuts in
flanges.

a. Check for loose or cracked mounting hardware on
alternator bracket and alternator pulley.

b. Check idler pulley for dents, nicks, and cuts in
flanges.

Check alternator drive belts for cracks, frays, and
shiny spots.

Pulley is damaged
to the point that it
affects belt wear.

a. Alternator
bracket or idler
pulley is cracked
or loose.

b. Pulley is
damaged to the
point that it affects
belt wear.

Any drive belt has
more than one
crack 1/8 in. (3
mm) in depth or 50
percent of belt
thickness, any
fray more than 2
in. (51 mm) long,
or has excessive
play.

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

29
Semiannual
THROT-
TLE
POSITION
SENSOR

Check TPS for secure mounting.
TPS is not firmly
mounted or
securely attached
to throttle lever.

30
Semiannual
ENGINE
a. Inspect engine speed governor for loose
mounting hardware.

b.
Check for fuel leaks around fittings and for
abrasion of fuel hoses.

a. Mounting
hardware is
loose or missing.

b. Fuel leaks are
evident.

2-38

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

30
Semiannual
ENGINE
(Cont)

c. Check for oil leaks around fittings and for
crimps in oil tubes.

d.
Check for secure attachment of throttle control
cable.

c. Class III leak
is evident.

d. Control cable
is not securely
attached.

31

32

Semiannual

Semiannual

TURBO-
CHARGER

CHARGE
AIR
COOLER
TUBES

Check turbocharger oil tubes for leaks or crimping
which would restrict oil flow.

a. Inspect charge air cooler tube assembly for
obvious signs of corrosion or cracking.

Class III leak is
evident.

a. Charge air
cooler tubing is
cracked.

2-39

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

32
Semiannual
CHARGE
AIR
COOLER
TUBES
(Cont)

b.
Check all hose clamps between turbocharger
and intake manifold and verify that they are
tight (90-100 lb-in. (10-11 N·m)).

c. Check turbocharger rubber charge air hoses for
cracking and chafing.

c. Rubber
hose(s) is
damaged.

33
Semiannual
CHARGE
AIR
COOLER

a. Inspect charge air cooler for bent or clogged
cooling fins.

b.
Check charge air cooler mounting for security
and tighten any loose hardware.

c. Inspect mounting brackets for cracks and
damage.

a. Charge air
cooler is
damaged.

2-40

TM 9-2320-365-20-1

Change 2
2-41

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

34
Semiannual
EXHAUST
AND
INTAKE
MANI-
FOLDS

a. Check exhaust manifold for damage, loose
mounting bolts and for exhaust leaks.

b. Check intake manifold for loose mounting bolts
and damage.

a. Exhaust
manifold is
damaged, exhaust
leaks, or mounting
hardware is loose.

b. Intake manifold
is damaged.
Mounting hardware
is loose.

35
Semiannual
ENGINE
CRANK-
CASE
BREATH-
ER

Inspect crankcase breather for oil leaks around base.
Check security of mounting hardware.
Class III leak or
loose or missing
hardware are
evident.

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

36

37

Semiannual

Semiannual

ENGINE
WIRING

AIR COM-
PRESSOR
AND
GOVER-
NOR

Check all engine wiring for signs of fraying,
chafing, cracking, and burnt insulation.

a. Inspect air compressor and air compressor
governor for leaks and loose hardware.

b.
Inspect air compressor oil tube for leaks and
kinks/bends which would cause a restriction.

c. Check air compressor coolant tubes for leaks
and kinks/bends.

Wiring is burned,
cracked, frayed,
or broken.

a. Class III leak
is evident or
hardware is
missing or loose.

b. Class III leak,
kinks or bends
are evident.

c. Class III leak,
kinks or bends
are evident.

2-42

TM 9-2320-365-20-1

Change 2
2-43

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

38
Semiannual
COOLING
SYSTEM

If
vehicle
has
been
operating,
use
extreme care to avoid being burned
when removing radiator cap. Use heavy
rags or gloves to protect hands. Turn
radiator cap only one-quarter turn to the
left and allow pressure to be relieved
before fully removing cap. Failure to
comply may result in injury to personnel.

a. Check coolant condition. Test coolant to see if
draining is necessary (TB 750-651).

b. Replace coolant if required (Appendix H Note 7).

WARNING

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

39
Semiannual
THERMO-
STAT
HOUSING

a. Check thermostat housing for loose mounting
bolts and leaks around base. Tighten loose
mounting bolts.

b.
Inspect upper coolant tube for cracks and
splits. Refer to para 6-9 if clamps are found
to be loose.

c. Check for leaks around water temperature
transducer and coolant temperature switch.

a. Class III leak
is evident.

c. Class III leak
is evident.

2-44

TM 9-2320-365-20-1

Change 2
2-45

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

40
Semiannual
WATER
PUMP
a. Check security of water pump attachment bolts
and hose clamps. Refer to para 6-12 if clamps
are found to be loose.

b. Inspect water pump for leaks around impeller
shaft.

c. Inspect water pump pulley and idler pulley for
damage.

a. Bolts are
stripped.

b. Class III leak is
evident.

c. Water pump
pulley or idler
pulley is damaged
to the point that it
affects belt wear.

d. Check drive belt for cracks, frays, and shiny
spots.
d. Drive belt has
more than one
crack 1/8 in. (3
mm) in depth or 50
percent of belt
thickness, any
fray more than 2
in. (51 mm) long,
or has excessive
play.

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

41
Semiannual
FAN
BLADE
AND
CLUTCH

a. Inspect fan for chipping, cracking, and missing
fan blades.

b.
Inspect fan clutch for loose bolts (para 6-14).

c. Check fan clutch air hose and fitting for leaks.

a. Fan blades
chipped, cracked,
or missing.

b. Loose or
missing bolts.

42
Semiannual
RADIA-
TOR

a. Check radiator for leaks and bent or clogged
cooling fins.

b.
Check fan shroud for cracks and missing
pieces.

a. Class III leak
is evident.

2-46

TM 9-2320-365-20-1

Change 2
2-47

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

43
Semiannual
FUEL/
WATER
SEPARA-
TOR

a. Inspect fuel/water separator assembly for dents and
cracks that could cause leaks.

b. Deleted.

a. Any leak is
evident.

TM 9-2320-365-20-1

2-48
Change 2

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked
or
Serviced

Procedure
Not Fully Mission
Capable If:

44
Semiannual
FRONT
WHEEL
ALIGN-
MENT

Check front wheel alignment (para 13-5).
Front wheels
cannot be aligned.

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

45
Semiannual
TRANS-
MISSION

Check to see if any diagnostic codes are logged in
WTEC II TEPSS (para 8-4) or WTEC III TPSS
(para 8-5).

a. Perform Transmission Troubleshooting (para
2-17) for all diagnostic codes logged in
WTEC II TEPSS or WTEC III TPSS.

b.
Clear all diagnostic codes from WTEC II
TEPSS (para 8-4) or WTEC III TPSS (para 8-
5).

2-49

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked
or
Serviced

Procedure
Not Fully
Mission
Capable If:

46
Semiannual
HYDRAU-
LIC
RESER-
VOIR (If
Equipped)

Inspect hydraulic reservoir for leaks, cracks, or
dents.

Class III is
evident.

2-50

TM 9-2320-365-20-1

Change 2
2-51

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.
Interval
Location
Item to be
Checked or
Serviced

Procedure
Not Fully Mission
Capable If:

47
Deleted

TM 9-2320-365-20-1

Table 2-1. Preventive Maintenance Checks and Services (Cont)

Item
No.

Interval

Location
Item to be
Checked or
Serviced

Procedure
Not Fully
Mission
Capable If:

48
Semiannual
11K SRW
Check security of 11K SRW mounting hardware.
Mounting
hardware broken
or missing.

49
Semiannual
CARGO
BODY

a. Check cargo body for corrosion and damage.

b.
Inspect ladder for damage and cracks.

2-52

TM 9-2320-365-20-1

Section IV. TROUBLESHOOTING

2-10. INTRODUCTION TO LOGIC TREE TROUBLESHOOTING

This section contains step-by-step procedures for identifying, locating, isolating, and repairing equipment malfunctions.

This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.

2-11. TROUBLESHOOTING INSTRUCTIONS

a. Page Layout. Troubleshooting procedures are divided into logic tree pages and test pages.

(1) A logic tree page is always a left-hand page, facing the test page on the right. The logic tree page provides
the sequence of steps required to isolate a fault to a failed component. All critical information for decision
making is on the left-hand page. Each logic tree page contains the following information:

(a)
INITIAL SETUP - This box is located only on the first logic tree page of a fault. INITIAL SETUP lists tools,
materials, references, personnel, and equipment needed to troubleshoot the fault.

(b)
KNOWN INFO - This box is located in the top left-hand column. KNOWN INFO lists conditions and information
that will eliminate specific components as the cause of the fault.

(c)
POSSIBLE PROBLEMS - This box is located directly below KNOWN INFO. All of the system components
that could cause a fault are listed in the POSSIBLE PROBLEMS box. The first component listed in the
POSSIBLE PROBLEMS box is the one that will be tested at that step in the logic sequence. When one of the
components is tested and found to operational, it is entered at the bottom of the KNOWN INFO box as OK.

(d)
QUESTION - Each question, located in the middle column, refers to the first possible problem listed in
POSSIBLE PROBLEMS. If the answer to the question is YES, proceed to the next step. If the answer is NO,
follow the NO arrow to obtain directions for correcting the problem. If the step contains a WARNING or
CAUTION message, a small shadow box is printed above the question. Text for WARNINGs or CAUTIONs
is on the following right-hand page.

(e)
TEST OPTIONS - This box is located in the top right-hand column. TEST OPTIONS lists tests available for
testing parts suspected of failing. When the TEST OPTION is a VOLTAGE TEST, the voltage values listed
are nominal values for a 12/24 VDC system. Some variation from these values should be expected. When
the TEST OPTION is a CONTINUITY TEST, the expected reading is one of low resistance. If high resistance
is noted, further testing should be performed to determine the cause.

(f)
REASON FOR QUESTION - This box is located directly below TEST OPTIONS. It explains the purpose for
the question in the middle column.

(2) A test page is always a right-hand page, facing the logic tree page on the left. The test provides detailed
instructions for testing the first component listed in the POSSIBLE PROBLEMS box. This test will also provide
an answer for the question in the middle column. Note the arrow connecting the test on the right-hand page
to the REASON FOR QUESTION. When possible, illustrations are included to provide visual details. Notes
contain additional information for testing.

Change 1
2-53

TM 9-2320-365-20-1

2-11. TROUBLESHOOTING INSTRUCTIONS (CONT)

b.
How to Begin Troubleshooting.

(1) Determine the symptom or condition that indicates a problem or failure. Troubleshooting is divided into
symptoms peculiar to a vehicle system or component, for example: pneumatic system or engine. Refer to the
Table 2-2. Vehicle Troubleshooting.

(2) Go to the referenced page to begin troubleshooting. Open the manual flat so both the left-hand and right-hand
pages are displayed before you. The information on both pages is important to resolve the problem or failure.
However, the experienced technician can follow the left-hand page instructions and refer to the right-hand page
when necessary.

(3) Follow the Diagnostic Procedure. Answer question No. 1 on the left-hand page and follow the YES or NO path
to either the remedy or the next question. If necessary, look on the right-hand page for test instructions and
illustrations.

(4) Observe warnings, cautions, and notes. The formatting and symbols used in this manual for warnings, cautions,
and notes are as follows:

WARNING

This is the symbol for a warning statement. If you see the word WARNING above a question on
the left-hand page, look on the right-hand page for the text of the message. WARNINGs describe
a situation which could cause serious injury or death to personnel.

CAUTION

This is the symbol for a caution statement. If you see the word CAUTION above a question on the left-
hand page, look on the right-hand page for the text of the message. CAUTIONs describe a situation
which could cause damage to equipment.

NOTE

This is a symbol for a note. Notes are located directly above the test to which they refer. NOTEs
provide additional information for performing a test.

c. Confidence Tests. Before performing any STE/ICE-R test, a confidence test must be run to ensure proper
operation of the STE/ICE-R. In addition, a confidence test must be performed after each use to ensure the
STE/ICE-R is performing properly. Refer to TM 9-4910-571-12&P.

d.
Verifying Repair. When troubleshooting, there is an additional step that must be performed after taking any
corrective action. This step will show that the malfunction has been corrected, or that additional troubleshooting
is required, example follows:

On malfunction q1. Wanders, pulls to one side, or shimmies; the question is asked "Are front shock absorbers secure
and free from damage?". If the question was answered NO, the damaged shock absorber(s) was replaced. After
replacing the damaged shock absorber(s), the vehicle must be checked to determine if the original malfunction is still
present. If corrected, troubleshooting is completed. If malfunction is still present, continue troubleshooting.

2-54

TM 9-2320-365-20-1

Table 2-2. Vehicle Troubleshooting

Troubleshooting
Procedure
Malfunction
(Page)

a. ENGINE SYSTEM TROUBLESHOOTING

a1.
Engine Does Not Crank
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-64

a2.
Engine Cranks But Does Not Start
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-68
a3.
Low Engine Oil Pressure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-72
a4.
Engine Stalls at Low RPM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-74
a5.
Engine Overspeeds on Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-80
a6.
Too Much Engine Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-82

a7.
Coolant in Engine Lubrication Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-84
a8.
Excessive Engine Oil Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-86
a9.
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-90
a10.
Excessive Black or Gray Exhaust Smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-92

a11.
White Exhaust Smoke
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-96
a12.
Low Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-100

b. FUEL SYSTEM TROUBLESHOOTING

b1.
Engine Cranks But Does Not Start or Engine Stalls After Starting . . . . . . . . . . . . . . . . . . . . . . .
2-102
b2.
Ether Starting Aid Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-108
b3.
Fuel Consumption Too High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-112
b4.
Accelerator Pedal Sticks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-114

c. EXHAUST SYSTEM TROUBLESHOOTING

c1.
Exhaust System Unusually Noisy or Vibrates Excessively During Engine Operation . . . . . . . . . .
2-120
c2.
Exhaust Fumes in Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-124

d. COOLING SYSTEM TROUBLESHOOTING

d1.
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-130
d2.
Oil in Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-142
d3.
Loss of Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-144

e. ELECTRICAL SYSTEM TROUBLESHOOTING

e1.
Circuit Breaker Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-150
e2.
Engine Does Not Crank
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-154

e3.
12 VDC and/or 24 VDC Circuits Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-254
e4.
24 VDC Circuits Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-258

e5.
Deleted
e6.
Engine Cranks But Does Not Start
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-300
e7.
FUEL Gage Does Not Operate or Is Inaccurate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-308

e8.
WATER TEMP Gage Does Not Operate or Is Inaccurate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-314
e9.
REAR BRAKE AIR Pressure Gage Does Not Operate or Is Inaccurate
. . . . . . . . . . . . . . . . . . .
2-318
e10.
FRONT BRAKE AIR Pressure Gage Does Not Operate or Is Inaccurate
. . . . . . . . . . . . . . . . . .
2-322

Change 1
2-55

TM 9-2320-365-20-1

2-56
Change 2

Table 2-2. Vehicle Troubleshooting (Cont)

Troubleshooting
Procedure
Malfunction
(Page)

e. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT)

e11.
Engine Oil Pressure Gage Does Not Operate or Is Inaccurate...............................................................2-326
e12.
Speedometer Does Not Operate or Is Inaccurate.................................................................................2-332
e13.
VOLTS Gage Does Not Operate or Is Inaccurate.................................................................................2-346
e14.
Tachometer Does Not Operate or Is Inaccurate ...................................................................................2-348
e15.
Audible Alarm Does Not Operate .......................................................................................................2-358
e16.
Troop Transport Audible Alarm Does Not Operate................................................................................2-362
e16A.
Master Power Switch Does Not Shut Down Engine...........................................................................2-370.4
e16B.
Lamp Test Switch Does Not Illuminate .......................................................................................... 2-370.10
e17.
Radiator Fan Off Switch Does Not Illuminate.......................................................................................2-372
e17A.
Ether Start Switch Does Not Illuminate...............................................................................................2-376
e17B.
Hazard Lights Switch Does Not Illuminate........................................................................................2-376.4
e17C.
Amber Warning Light Switch Does Not Illuminate.............................................................................2-376.8
e17D.
Master Power Switch Does Not Illuminate...................................................................................... 2-376.12
e18.
REAR BRAKE AIR Gage Does Not Illuminate.....................................................................................2-378
e18A.
FUEL Gage Does Not Illuminate .....................................................................................................2-380.2
e18B.
FRONT BRAKE AIR Gage Does Not Illuminate................................................................................2-380.6
e18C.
Speedometer Does Not Illuminate................................................................................................. 2-380.10
e18D.
VOLTS Gage Does Not Illuminate................................................................................................. 2-380.14
e18E.
WATER TEMP Gage Does Not Illuminate...................................................................................... 2-380.18
e19.
OIL PRESS Gage Does Not Illuminate ...............................................................................................2-382
e20.
Auxiliary Panel, Personnel Heater, and Instrument Panel Do Not Illuminate ...........................................2-386
e21.
Tachometer Does Not Illuminate........................................................................................................2-390
e22.
Auxiliary Panel Switch Does Not Illuminate.........................................................................................2-394
e23.
Auxiliary Panel Does Not Illuminate....................................................................................................2-398
e24.
High Engine Temperature Indicator Does Not Operate..........................................................................2-402
e24A.
High Engine Temperature Indicator Illuminates .................................................................................2-408.2
e25.
CTIS Overspeed Indicator Does Not Operate.......................................................................................2-410
e26.
Chemical Detector Indicator Does Not Operate....................................................................................2-424
e27.
Left Turn Signal Indicator Does Not Operate........................................................................................2-428
e28.
Right Turn Signal Indicator Does Not Operate......................................................................................2-432
e29.
Turn Signal Indicators and High Beams On Indicator Do Not Operate....................................................2-438
e30.
High Beams Indicator Does Not Operate.............................................................................................2-440
e31.
Parking Brake Indicator and/or Emergency Brake Indicator Does Not Illuminate .....................................2-444
e32.
PTO Indicator Does Not Operate........................................................................................................2-460
e33.
Fan Off Indicator Does Not Operate....................................................................................................2-472
e34.
WTEC II Transmission Temperature Indicator Does Not Operate...........................................................2-478
e35.
WTEC III Transmission Temperature Indicator Does Not Operate..........................................................2-486
e36.
Front Brake Air Indicator Does Not Illuminate When Air Pressure Is Below 65 PSI..................................2-492
e37.
Rear Brake Air Indicator Does Not Illuminate When Air Pressure Is Below 65 PSI ..................................2-498
e38.
Engine Oil Pressure Indicator Does Not Operate.................................................................................2-504
e39.
Master Stop Indicator Does Not Operate.............................................................................................2-510
e40.
One or Both Headlights (High and Low Beams) Do Not Illuminate.........................................................2-512
e41.
One or Both Headlight Low Beams Do Not Illuminate...........................................................................2-520
e42.
One or Both Headlight High Beams Do Not Illuminate..........................................................................2-526
e43.
Parking Lights Do Not Illuminate........................................................................................................2-534
e44.
LH Door and/or LH Front Marker Lights Do Not Illuminate.....................................................................2-542
e45.
RH Door and/or RH Front Marker Lights Do Not Illuminate....................................................................2-552
e46.
One or More Cab Top Marker Lights Do Not Illuminate.........................................................................2-562

TM 9-2320-365-20-1

Troubleshooting
Procedure
Malfunction
(Page)

e47.
Side and/or Rear Marker Lights Do Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-576
e47A.
All Marker Lights Do Not Illuminate In Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-584.52

e48.
One or Both Composite Taillights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-586
e49.
One or Both Front Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-596
e50.
Blackout Drive Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-606
e51.
One or Both Rear Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-616
e52.
Warning Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-626
e53.
Backup Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-638
e54.
Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-676
e54A.
Front Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-678

e55.
Rear Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-680
e56.
Front and Rear Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-682
e57.
Front and Rear Turn Signals Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-690
e58.
Left or Right Front Turn Signals Do Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-702
e59.
One or Both Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-710

e60.
One or Both Blackout Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-728
e61.
Stoplights and Blackout Stoplights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-740
e62.
Trailer Marker/Taillights Do Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-750

e63.
Trailer Right Stop/Turn Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-760
e64.
Trailer Left Stop/Turn Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-770
e65.
Trailer Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-780
e66.
Trailer Blackout Stoplights Do Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-790
e67.
Intervehicle Clearance Lights Do Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-800
e68.
Intervehicle Left Turn Signal Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-804

e69.
Intervehicle Right Turn Signal Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-810
e70.
Intervehicle Stoplights Do Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-816
e71.
Intervehicle Taillights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-822
e72.
Personnel Heater Control Illumination Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-826
e73.
Personnel Heater Fan Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-832
e74.
Windshield Washer Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-838
e75.
Windshield Wiper Does Not Operate On Low Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-850

e76.
All Windshield Wiper Speeds Do Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-858
e77.
Windshield Wiper Does Not Operate On Intermittent Speed
. . . . . . . . . . . . . . . . . . . . . . . . . . .
2-864

e78.
Windshield Wiper Does Not Operate On High Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-874
e79.
Horn Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-880
e80.
Chemical Alarm Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-892
e81.
Chemical Detector Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-900
e82.
Central Tire Inflation System (CTIS) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-906

e83.
CTIS Does Not Inflate Tires
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-920
e84.
CTIS Does Not Deflate Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-930
e85.
11K Self-Recovery Winch (SRW) Does Not Reel In or Pay Out . . . . . . . . . . . . . . . . . . . . . . . . .
2-940
e86.
11K Self-Recovery Winch (SRW) Does Not Reel In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-946
e87.
11K Self-Recovery Winch (SRW) Does Not Pay Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-958
e88.
PTO Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-970
e89.
Electrical System Does Not Maintain a Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1010
e90.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Illumination Does Not Dim
. . .
2-1018
e91.
Engine Fan Runs Constantly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1028
e92.
Engine Fan Does Not Turn Off Using Radiator Fan Off Switch
. . . . . . . . . . . . . . . . . . . . . . . .
2-1036

e93.
Ether Start Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1044
e94.
Excessive Condensation In Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1060

e95.
Radio Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1064
e96.
Start Inhibit Pushbutton Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1070

Change 1
2-57

TM 9-2320-365-20-1

2-58
Change 2

Table 2-2. Vehicle Troubleshooting (Cont)

Troubleshooting
Procedure
Malfunction
(Page)

e. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT)

e97.
Air Dryer Does Not Operate.............................................................................................................2-1076
e98.
Battery Tester Does Not Operate.....................................................................................................2-1082

Volume 2

e99.
M1079 Fan Does Not Operate.........................................................................................................2-1088
e100.
All M1079 Van Body Marker Lights Do Not Operate...........................................................................2-1100
e101.
M1079 Van Body Clearance Marker Light Does Not Illuminate............................................................2-1104
e102.
All M1079 Fluorescent Lights Do Not Operate...................................................................................2-1108
e103.
M1079 Lighting Fixture(s) DS80 and/or DS81 Do Not Operate............................................................2-1118
e104.
M1079 Lighting Fixture(s) DS82 and/or DS83 Do Not Operate............................................................2-1134
e105.
M1079 110 VAC Outlet J233 Does Not Operate................................................................................2-1152
e106.
M1079 110 VAC Outlet J234 Does Not Operate................................................................................2-1160
e107.
M1079 110 VAC Outlet J235 Does Not Operate ................................................................................2-1168
e108.
M1079 110 VAC Outlet J232 Does Not Operate in Normal Mode.........................................................2-1176
e109.
M1079 110 VAC Outlet J232 and J233 Do Not Operate in Blackout Override Mode...............................2-1190
e110.
M1079 110 VAC Outlet J231 Does Not Operate................................................................................2-1194
e111.
M1079 110 VAC Outlet J230 Does Not Operate................................................................................2-1208
e112.
M1079 Blackout Light(s) Does Not Operate ......................................................................................2-1222
e113.
M1079 Emergency Light(s) Does Not Illuminate ................................................................................2-1230
e114.
M1079 Field Phone 1 and/or 2 Binding Post Does Not Operate...........................................................2-1244
e115.
M1079 Air Conditioner Does Not Operate..........................................................................................2-1264
e116.
M1079 Heater Does Not Operate.....................................................................................................2-1276
e117.
M1079 24 VDC Binding Post(s) Does Not Operate ............................................................................2-1296
e118.
M1079 Van Door Open Light Does Not Illuminate and Audible Alarm Does Not Operate........................2-1324
e119.
M1079 110 VAC Power Does Not Operate........................................................................................2-1338
e120.
M1079 Fluorescent Lights Do Not Operate In Blackout Override Mode.................................................2-1352

f. TRANSMISSION SYSTEM TROUBLESHOOTING

f1.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Emits Eight
Seconds of Beeps and/or Transmission Does Not Shift Gears ............................................................2-1362
f2.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 22 Sub Code 14.............................................................................................................2-1364
f3.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 22 Sub Code 15.............................................................................................................2-1372
f4.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 22 Sub Code 16.............................................................................................................2-1378
f5.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 24 and/or 33 and Any Sub Code......................................................................................2-1384
f6.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 32 and Any Sub Code ....................................................................................................2-1396
f7.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 41, 42, 44, 45, 66, and/or 69 and Any Sub Code...............................................................2-1400
f8.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 43 and Any Sub Code ....................................................................................................2-1404

TM 9-2320-365-20-1

Change 2 2-59

Troubleshooting
Procedure
Malfunction
(Page)

f9.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 52 and Any Sub Code ....................................................................................................2-1410
f10.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 57 and Any Sub Code ....................................................................................................2-1416
f11.
Transmission Unusually Noisy When Operating ................................................................................2-1420
f12.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 21 and Any Sub Code ....................................................................................................2-1430
f13.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 51 Sub Code 10, 12, 21, 43, 45, or 65..............................................................................2-1444
f14.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 25 and Any Sub Code ....................................................................................................2-1448
f15.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 53 and Any Sub Code ....................................................................................................2-1452
f16.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 54 Sub Code 01, 07, 10, 12, 17, 21, 23, 27, 32, 34, 43, 45, 54, 56,
65, 70, 71, 72, 80, 81, 82, 83, 85, 86, 92, 93, 95, 96, or 97 ................................................................2-1456
f17.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 55 and Any Sub Code ....................................................................................................2-1462
f18.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 56 and Any Sub Code ....................................................................................................2-1468
f19.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 13 and Any Sub Code ....................................................................................................2-1474
f19A.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Displays
Main Code 23 and Any Sub Code ................................................................................................. 2-1482.2
f19B.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Does Not Illuminate....................... 2-1482.16
f20.
Metal Particles Found During Transmission Oil Change .....................................................................2-1484
f21.
Transmission Does Not Shift or is Slow To Shift When Cold...............................................................2-1486
f22.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 22 Sub Code 14.............................................................................................................2-1488
f23.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 22 Sub Code 15.............................................................................................................2-1494
f24.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 22 Sub Code 16.............................................................................................................2-1498
f25.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 24 and/or 33 and Any Sub Code......................................................................................2-1504
f26.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 32 and Any Sub Code ....................................................................................................2-1516
f27.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 42, 44, 45, 46, 66, and/or 69 and Any Sub Code ..............................................................2-1522
f28.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 52 and Any Sub Code ....................................................................................................2-1526
f29.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 57 and Any Sub Code ....................................................................................................2-1532
f30.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 21 and Any Sub Code ....................................................................................................2-1536
f31.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 51 and Any Sub Code ....................................................................................................2-1550
f32.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 25 and Any Sub Code ....................................................................................................2-1554
f33.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 53 and Any Sub Code ....................................................................................................2-1558

TM 9-2320-365-20-1

Table 2-2. Vehicle Troubleshooting (Cont)

Troubleshooting
Procedure
Malfunction
(Page)

f. TRANSMISSION SYSTEM TROUBLESHOOTING (CONT)

f34.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 54 and Any Sub Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1562
f35.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 55 and Any Sub Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1568
f36.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 56 and Any Sub Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1574
f37.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 13 and Any Sub Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1580
f38.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Indicator
Displays "--" and/or Transmission Does Not Shift Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1594
f39.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Displays
Main Code 23 and Any Sub Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1596
f40.
WTEC III Transmission Pushbutton Shift Selector (TPSS) Does Not Illuminate . . . . . . . . . . . 2-1596.12

g. PROPELLER SHAFT TROUBLESHOOTING

g1.
Drive Shaft or Universal Joint Unusually Noisy When Operating
. . . . . . . . . . . . . . . . . . . . . . .
2-1598

h. POWER TAKE OFF (PTO) TROUBLESHOOTING

h1.
PTO Does Not Engage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1604

i. BRAKE SYSTEM TROUBLESHOOTING

i1.
Excessive Braking Distance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1608
i2.
Rear Brakes Do Not Apply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1620
i3.
Parking Brake Does Not Release
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1644
i4.
Front Brakes Overheat and/or Do Not Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1670
i5.
Vehicle Brakes Unevenly, Brakes Pull to One Side or Grab . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1676
i6.
Front Brakes Do Not Apply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1690
i7.
Rear Brakes Overheat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1700
i8.
Parking Brake Does Not Apply
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1708
i9.
Brake System Loses Air When Brakes Are Applied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1712

j. AIR SYSTEM TROUBLESHOOTING

j1.
Air System Loses Pressure During Operation/Slow, No, or Incorrect Air Pressure Buildup . . . . .
2-1714
j2.
Large Quantity of Moisture Expelled From Air Reservoirs . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1730
j3.
Air Dryer Purges Constantly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1734
j4.
No Air Pressure Present at Rear Gladhands
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1738
j5.
Air System Pressure Builds Up More Than 120 PSI (827 kPa) (Compressor Fails to Unload) . .
2-1744
j6.
Noisy Air Compressor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1748

k. WHEEL TROUBLESHOOTING

k1.
Tires Wear Unevenly or Excessively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1754
k2.
Wheel Wobbles or Shimmies
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1758

2-60
Change 1

TM 9-2320-365-20-1

Change 2 2-61

Troubleshooting
Procedure
Malfunction
(Page)

l. HYDRAULIC SYSTEM TROUBLESHOOTING

l1.
Loss of Hydraulic Pressure (Single Stage Pump)...............................................................................2-1762

m. CENTRAL TIRE INFLATION SYSTEM (CTIS) TROUBLESHOOTING

m1.
Two Steady Mode Lights Illuminate on Central Tire Inflation System (CTIS) ECU..................................2-1768
m2.
Four CTIS ECU Indicator Lights Flashing ..........................................................................................2-1798
m3.
Five Central Tire Inflation System (CTIS) ECU Indicator Lights Flashing...............................................2-1822
m4.
CTIS Repeatedly Resumes Cycling 30 Seconds After Indicator Lights Stop Flashing............................2-1856
m5.
Central Tire Inflation System (CTIS) ECU Indicates No Fault Code But Fails
to Inflate or Deflate..........................................................................................................................2-1862
m6.
No Overspeed Warning Light and/or Overspeed Pressure Change.......................................................2-1874

n. AXLE TROUBLESHOOTING

n1.
Axle Differential(s) Noisy.................................................................................................................2-1896

p. STEERING TROUBLESHOOTING

p1.
Hard to Steer .................................................................................................................................2-1904
p2.
Wanders, Pulls to One Side, or Shimmies ........................................................................................2-1910
p3.
Excessive Play When Turning Steering Wheel..................................................................................2-1916
p4.
No Response When Turning Steering Wheel.....................................................................................2-1920

q. SUSPENSION SYSTEM TROUBLESHOOTING

q1.
Wanders, Pulls to One Side, or Shimmies ........................................................................................2-1926
q2.
Leans to One Side or Rear of Vehicle Sags ......................................................................................2-1940

r. 11K SELF-RECOVERY WINCH (SRW) SYSTEM TROUBLESHOOTING

r1.
11K Self-Recovery Winch (SRW) Does Not Work..............................................................................2-1946

s. STEERING HYDRAULIC SYSTEM TROUBLESHOOTING

s1.
Steering Hard or Does Not Work......................................................................................................2-1954

t. AIR TRANSPORT TROUBLESHOOTING

t1.
Cab Tilt, Spare Tire Retainer, and Suspension Compression Do Not Operate.......................................2-1960
t2.
Suspension Does Not Compress and/or Return to Normal..................................................................2-1970
t3.
Cab Leveling Air Springs Do Not Operate..........................................................................................2-1972

u. SPECIAL PURPOSE KIT TROUBLESHOOTING

u1.
No Power To Digitization Rack.........................................................................................................2-1978
u2.
No Power To Mobile Tracking System (MTS) Sense..........................................................................2-1988
u3.
No Power To Enhanced Position Location Reporting System (EPLRS)................................................2-1994

TM 9-2320-365-20-1

2-62
Change 2

Table 2-2. Vehicle Troubleshooting (Cont)

Troubleshooting
Procedure
Malfunction
(Page)

u. SPECIAL PURPOSE KIT TROUBLESHOOTING (CONT)

u4.
No Power To Precision Lightweight Global Positioning System Receiver (PLGR)..................................2-1998
u5.
No Power To Drivers Visual Enhancement (DVE)...............................................................................2-2002
u6.
No Power To SINCGAR/FORCE XXI Battle Command Brigade and Below (FBCB)................................2-2006
u7.
No Power TO Mobile Tracking System (MTS)....................................................................................2-2010
u8.
Deleted
u9.
Deleted
u10.
Deleted
u11.
Deleted
u12.
Deleted
u13.
Deleted
u14.
Deleted
u15.
Deleted
u16.
Deleted
u17.
Deleted
u18.
Troop Transport Alarm Does Not Operate..........................................................................................2-2078
u19.
Light Material Handling Crane (LMHC) Does Not Operate...................................................................2-2088
u20.
Light Material Handling Crane (LMHC) Hoist IN Does Not Operate.......................................................2-2106
u21.
Light Material Handling Crane (LMHC) Hoist OUT Does Not Operate...................................................2-2110

v. CAB TILT AND SPARE TIRE RETAINER TROUBLESHOOTING

v1.
Cab Does Not Raise.......................................................................................................................2-2116
v2.
Cab Does Not Lower.................................................................................................................... 2-2116.8
v3.
Spare Tire Retainer Does Not Raise.................................................................................................2-2118
v4.
Spare Tire Retainer Does Not Lower.............................................................................................. 2-2118.6

w. FRAME TROUBLESHOOTING

w1.
Tires Continue to Wear After Front End Alignment and/or Vehicle Drives Sideways
Down Road....................................................................................................................................2-2122

TM 9-2320-365-20-1

2-12. ENGINE SYSTEM TROUBLESHOOTING

This paragraph covers Engine System Troubleshooting. The Engine System Fault Index, Table 2-3, lists faults for the
engine system of the vehicle.

Table 2-3. Engine System Fault Index

Fault No.
Description
Page

a1.
Engine Does Not Crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64

a2.
Engine Cranks But Does Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68

a3.
Low Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72

a4.
Engine Stalls at Low RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-74

a5.
Engine Overspeeds on Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-80

a6.
Too Much Engine Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82

a7.
Coolant in Engine Lubrication Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84

a8.
Excessive Engine Oil Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-86

a9.
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-90

a10.
Excessive Black or Gray Exhaust Smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92

a11.
White Exhaust Smoke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-96

a12.
Low Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-100

Change 1
2-63

1.

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Are batteries fully charged?

Batteries electrolyte level OK.

POSSIBLE PROBLEMS

Engine will not crank if batteries
are discharged.

Battery Specific Gravity Test

NO

YES

Faulty battery(ies).
Faulty electrical system.
Faulty air compressor.
Faulty engine assembly.

Charge battery(ies)
(TM 9-6140-200-14) or
replace battery(ies)
(para 7-46).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Apron, Rubber (Item 3, Appendix C)
Gloves, Rubber (Item 13, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Tester, Antifreeze and Battery (Item 41, Appendix C)

TM 9-2320-365-20-1

2-64 Change 1

a1. ENGINE DOES NOT CRANK

INITIAL SETUP

Equipment Conditions
Engine shutdown (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-6140-200-14
TM 9-4910-571-12&P

START

Battery Specific Gravity Test

Remove rings, bracelets, watches,
necklaces, and any other jewelry before
working around vehicle. Jewelry can catch on
equipment and cause injury or short across
electrical circuit and cause severe burns or
electrical shock. Batteries can explode from a
spark. Battery acid is harmful to skin and eyes.
Always wear eye protection and rubber gloves
when working with batteries.

(1) Remove battery box cover from battery box
(TM 9-2320-365-10).
(2) Remove four batteries from battery box
(para 7-46).
(3) Test batteries for serviceability (TM 9-6140-
200-14).
(4) Charge battery(ies) if discharged (TM 9-
6140-200-14).
(5) Replace battery(ies) if unserviceable (TM 9-
6140-200-14).
(6) Install four batteries in battery box (para 7-
46).
(7) Install battery box cover on battery box
(TM 9-2320-365-10).

Change 1 2-65

TM 9-2320-365-20-1

WARNING

a1. ENGINE DOES NOT CRANK (CONT)

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

NO

YES

2.

Batteries electrolyte level OK.
Battery(ies) OK.

POSSIBLE PROBLEMS

Faulty electrical system.
Faulty air compressor.
Faulty engine assembly.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Operational Test

Perform Electrical System Troubleshooting,
e2. Engine Does Not Crank.

Can engine be turned
manually?

TM 9-2320-365-20-1

2-66 Change 1

Notify DS Maintenance to perform
Engine System Troubleshooting
a14. Engine Does Not Crank.

OPERATIONAL TEST

(1) Raise cab (TM 9-2320-365-10).
(2) Attempt to rotate engine by turning
alternator pulley.
(3) If engine can not be turned manually, notify
DS Maintenance to perform Engine System
Troubleshooting task a14. Engine Does Not
Crank.
(4) If engine can be turned manually, perform
Electrical System Troubleshooting, e2.
Engine Does Not Crank.
(5) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-67

Perform Electrical System Troubleshooting
task e6. Engine Cranks But Does Not Start.

a2. ENGINE CRANKS BUT DOES NOT START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Pan, Drain (Item 24, Appendix C)

References
TM 9-4910-571-12&P

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

Restricted or damaged air
cleaner hose or tube may
cause engine not to intake
enough air to ignite fuel.

KNOWN INFO
TEST OPTIONS

Fuel Return Hose Test

REASON FOR QUESTION

Perform Fuel System Troubleshooting task
b1. Engine Cranks But Does Not Start or
Engine Stalls After Starting.

NO

YES

Fuel quantity OK.
Fuel/water separator is primed.

POSSIBLE PROBLEMS

Air cleaner hose or tube
restricted or damaged.
Faulty fuel system.
Faulty electrical system.

Fuel quantity OK.
Fuel/water separator is primed.
Air cleaner hose or tube OK.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

2-68 Change 1

If fuel does not flow from fuel
return hose, fuel system is
faulty. If fuel does flow from
fuel return hose, electrical
system is faulty.

START

1.

Are air cleaner tube and
hose free from restrictions
and/or damage?

Faulty fuel system.
Faulty electrical system.

2.

Does fuel flow from fuel
return hose?

WARNING
Read WARNING
on following page.

YES
Remove restrictions and damaged
air cleaner hose or tube (para 4-2).

NO

FUEL RETURN HOSE TEST

Fuel is very flammable and can explode easily.
To avoid serious injury or death, keep flame
away from fuel and keep fire extinguisher within
easy reach. When working with fuel, post signs
that read NO SMOKING WITHIN 50 FEET OF
VEHICLE.

WARNING

(1) Raise cab (TM 9-2320-365-10).
(2) Remove air cleaner hose and tube and inspect
for restrictions and damage which would
cause a loss of intake air (para 4-2).
(3) Lower cab (TM 9-2320-365-10).

NOTE

(1) Position drain pan under fuel tank.
(2) Remove fuel return hose from fuel tank.
(3) Place fuel hose in drain pan.

Fuel should flow freely from fuel hose
with no restriction.

(4) Attempt to start engine
(TM 9-2320-365-10) and observe fuel
flow from fuel return hose.
(5) If fuel does not flow from fuel return hose,
perform Fuel System Troubleshooting task
b1. Engine Cranks But Does Not Start or
Engine Stalls After Starting.
(6) If fuel does flow from fuel return hose,
perform Electrical System Troubleshooting
task e6. Engine Cranks But Does Not Start.
(7) Install fuel return hose on fuel tank.

Change 1 2-69/(2-70 Blank)

TM 9-2320-365-20-1

All data on pages 2-70 and 2-71 deleted.

a3. LOW ENGINE OIL PRESSURE

START

1.

Is engine oil filter free from
leaks or damage?

KNOWN INFO

Engine oil level and condition
OK.

POSSIBLE PROBLEMS

Damaged engine oil filter.
Faulty reading from oil pressure
gage.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

Leaking engine oil filter or oil
tubes will cause low oil level
and result in low engine oil
pressure.

NO

Replace damaged oil tubes and
fittings. Replace damaged engine
oil filter (para 3-4).

YES

2.

Is oil pressure gage reading
correctly?

KNOWN INFO

Engine oil level and condition
OK.
Engine oil filter and oil tubes
OK.

POSSIBLE PROBLEMS

Faulty reading from oil pressure
gage.

TEST OPTIONS

Pressure Gage Check or
STE/ICE-R Test #50

REASON FOR QUESTION

Defective wiring, sending unit,
or gage will indicate low oil
pressure even though engine
oil pressure is good. If gage
shows HIGH pressure, sending
unit is faulty. If gage shows
no pressure, gage is faulty.

NO

YES

Notify DS Maintenance.

Perform Electrical System Troubleshooting
task e11. Engine Oil Pressure Gage Does
Not Operate Or Is Inaccurate.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)

TM 9-2320-365-20-1

(2-71 Blank)/2-72 Change 1

PRESSURE GAGE CHECK

(1) Lower cab (TM 9-2320-365-10).
(2) Start engine (TM 9-2320-365-10).
(3) Perform STE/ICE-R test #50.
(4) Oil pressure gage should read 15 PSI
(100 kPa) at 750 RPM and maximum at full
load condition of 88 PSI (600 kPa).
(5) If oil pressure gage does not read correctly,
perform Electrical System Troubleshooting
task e11. Engine Oil Pressure Gagae Does
Not Operate Or Is Inaccurate.
(6) If oil pressure gage reads correctly, notify
DS Maintenance.
(7) Shut down engine (TM 9-2320-365-10).

(1) Raise cab (TM 9-2320-365-10).
(2) Check engine oil filter for leaks and damage.
(3) If engine oil filter is not free from leaks and
damage, replace engine oil filter (para 3-4).

Change 1 2-73

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-74
2-74
2-74
2-74
2-74

1.

START

YES

2.

NO

NO

YES

a4. ENGINE STALLS AT LOW RPM

TEST OPTIONS

REASON FOR QUESTION

REASON FOR QUESTION

TEST OPTIONS

Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.

Air in fuel system.
Dirty fuel filters.
Faulty transfer pump.
Faulty fuel pressure
regulating valve.

Air in the fuel system
will cause engine to
stall at low rpm.

Leaks or bad bends in
fuel hoses will cause
engine to stall at low
rpm.

Are fuel hoses
between fuel tank
and fuel transfer
pump free of kinks,
breaks and leakage?

Replace fuel
hose(s) (para 4-9).

Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.
Fuel hoses OK.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty fuel hoses between
fuel tank and fuel transfer
pump.
Air in fuel system.
Dirty fuel filters.
Faulty transfer pump.
Faulty fuel pressure
regulating valve.

KNOWN INFO

POSSIBLE PROBLEMS

Visual inspection

Visual inspection

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

References
TM 9-4910-571-12&P

Is the fuel system free
from air at fuel/water
separator?

Replace fuel/water
separator (para 4-13).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-75
2-75
2-75
2-75
2-75

(1) Raise cab (TM 9-2320-365-10).
(2) Check fuel tank and fuel transfer pump
hoses for kinks, looseness, and leakage.
(3) If fuel hoses are not free from kinks or
leaks, replace fuel hose(s) (para 4-9).

(1) Push in fuel primer pump on fuel/water separator.
(2) Pump fuel primer pump until resistance
is felt to purge air from fuel system.
(3) If no resistance is felt, replace fuel/water
separator (para 4-13).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-76
2-76
2-76
2-76
2-76

3.

Dirty or clogged fuel
filters will cause
engine to stall at low
rpm.

NO

YES

Are primary and
secondary fuel filters
clean and clear
of debris?

YES

4.

NO
Faulty transfer pump.
Faulty fuel pressure
regulating valve.

Dirty fuel filters.
Faulty transfer pump.
Faulty fuel pressure
regulating valve.

Is outlet pressure
of fuel transfer
pump 10 - 65 psi.

TEST OPTIONS

REASON FOR QUESTION

TEST OPTIONS

Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.

Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.
Fuel filters OK.

KNOWN INFO

POSSIBLE PROBLEMS

KNOWN INFO

POSSIBLE PROBLEMS

REASON FOR QUESTION

Fuel Pump Test
or STE/ICE-R Test #50

Remove and inspect

Low fuel pressure from
fuel transfer pump will
cause engine to stall at
low rpm.

Replace fuel
filter (para 4-14).

Notify DS Maintenance.

a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-77
2-77
2-77
2-77
2-77

FUEL PUMP TEST

(1) Remove inlet fuel tube from secondary fuel
filter base.
(2) Position drain pan under inlet fuel tube.
(3) Attempt to start engine (TM 9-2320-365-10).
(4) Check for fuel flow from inlet fuel tube while
attempting to start engine.
(5) If fuel does not flow from inlet fuel tube, notify
DS Maintenance.
(6) Install inlet fuel tube on secondary fuel filter
base.

(1) Check primary and secondary fuel filters for
dirt and contamination.
(2) Position drain pan under filter.
(3) Remove filter element from base.
(4) Inspect for clogs and debris.
(5) If fuel filter is clogged, replace fuel filter
(para 4-14).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-78
2-78
2-78
2-78
2-78

NO

YES

5.

Faulty fuel pressure
regulating valve.

Is fuel pressure
regulating valve
free from leaks
or damage?

A defective or leaking
fuel pressure regulating
valve will cause
engine to stall at low
rpm.

TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

KNOWN INFO

POSSIBLE PROBLEMS

Visual inspection

Replace fuel pressure
regulating valve (para 4-3).

Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.
Fuel filters OK.
Fuel transfer pump OK.

a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)
a4. ENGINE STALLS AT LOW RPM (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-79
2-79
2-79
2-79
2-79

(1) Check fuel pressure regulating valve for
leaks or damage.
(2) If fuel pressure regulating valve is
damaged, replace fuel pressure regulating
valve (para 4-3).
(3) If fuel pressure regulating valve is free
from leaks and damage, notify DS
Maintenance.
(4) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-80
2-80
2-80
2-80
2-80

a5. ENGINE OVERSPEEDS ON START

1.

START

Nothing

Faulty fuel control
linkage.

NO

Is fuel control
linkage secure
and free from
damage?

YES

Visual inspection
TEST OPTIONS
KNOWN INFO

POSSIBLE PROBLEMS
REASON FOR QUESTION

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Missing hardware or
damage to fuel control
linkage will cause engine
to overspeed.

Notify DS Maintenance.

Replace missing
hardware or damaged
linkage (para 4-12, 4-18,
4-19, and/or 4-20).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-81
2-81
2-81
2-81
2-81

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Check fuel control linkage for improper
assembly, missing hardware, and damaged
parts.
(3) Install instrument panel assembly (para 7-15).
(4) Raise cab (TM 9-2320-365-10).
(5) Check fuel control linkage for improper
assembly, missing hardware, and damaged
parts.
(6) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-82
2-82
2-82
2-82
2-82

1.

START

YES

NO

Loose mounting
bolts or damaged
engine mounts
will cause vibration.

Are engine mounts
secure and free
from damage?

Vibration damper OK.
Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.

2.

Faulty engine mounts.
Toe-in out of adjustment.

Toe-in out of adjustment.

Vibration damper OK.
Air cleaner OK.
Engine oil level and
condition OK.
Air system OK.
Engine mounts OK.
NO

YES

Improper toe-in
will cause vibration.

TEST OPTIONS

REASON FOR QUESTION

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

KNOWN INFO

POSSIBLE PROBLEMS

Are front wheels aligned
properly?

a6. TOO MUCH ENGINE VIBRATION

Visual inspection

Visual inspection

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Align front wheels
(para 13-5).

Notify DS Maintenance.

Notify DS Maintenance.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-83
2-83
2-83
2-83
2-83

(1) Check tires for uneven tire wear.
(2) If uneven tire wear is found, align front
wheels (para 13-5).
(3) If front tires do not have uneven wear,
notify DS Maintenance.

(1) Check engine mounts for loose mounting
hardware and damage.
(2) If engine mounts are damaged or mounting
hardware is loose, notify DS Maintenance.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-84
2-84
2-84
2-84
2-84

1.
Nothing

Faulty head gasket or
cylinder head.

Visual inspection
and
Head Gasket Test

YES

NO

Is cylinder head
free from leaks
and radiator overflow
tank free from
bubbles?

START

TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

Notify DS Maintenance.

KNOWN INFO

POSSIBLE PROBLEMS

a7. COOLANT IN ENGINE LUBRICATION OIL

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Air bubbles in radiator
overflow tank or water
seepage from cylinder
head will cause leakage of
coolant into lubrication oil.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-85
2-85
2-85
2-85
2-85

HEAD GASKET TEST

(1) Remove radiator cap.
(2) Start engine (TM 9-2320-365-10).

NOTE

Air bubbles in the
coolant are a sign
of probable leakage
at the head gasket.

(3) Look for air bubbles in coolant.
(4) Install radiator cap.
(5) Shut down engine (TM 9-2320-365-10).

(1) Raise cab (TM 9-2320-365-10).
(2) Check sides of engine block at cylinder head
for obvious signs of water leakage.
(3) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-86
2-86
2-86
2-86
2-86

1.

START

Engine oil level OK.

YES

2.

Leaking engine valve
cover and/or gasket
will cause excessive
oil consumption.

Damaged valve cover
or gasket.
Damaged oil pan, air
compressor, cylinder
head, or sending unit.

YES

NO

NO

Replace damaged
valve cover and
gasket (para 3-3).
Tighten loose valve
cover bolts (para 3-3).

a8. EXCESSIVE ENGINE OIL CONSUMPTION

TEST OPTIONS

REASON FOR QUESTION

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

KNOWN INFO

Engine oil level OK.
Engine oil filter and oil
tubes OK.

POSSIBLE PROBLEMS

Visual inspection

Visual inspection

Damaged engine oil
filter or oil tubes.
Damaged valve cover
or gasket.
Damaged oil pan, air
compressor, cylinder
head, or sending unit.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Are engine oil
filter and oil tubes
secure and free
from leaks or
damage?

Is engine valve cover
and gasket free from
leaks or damage?

Leaking engine oil filter or
oil tubes will cause
excessive oil consumption.

Replace damaged oil
tubes and fittings.
Replace damaged
engine oil filter (para 3-4).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-87
2-87
2-87
2-87
2-87

Oil consumption is considered
normal up to 12,000 mi (19,308
km) at a rate of one qt (one L)
of oil per 45 gal (170 L) of fuel.
After 12,000 mi (19,308
km), oil consumption is
considered normal at a rate of
one qt (one L) of oil per 60 gal
(227 L) of fuel.

NOTE

(1) Check engine valve cover and gasket for
leaks and damage.
(2) If engine valve cover or gasket leaks,
tighten loose valve cover bolts (para 3-3).
(3) If engine valve cover or gasket is
damaged, replace valve cover and gasket
(para 3-3).

(1) Raise cab (TM 9-2320-365-10).
(2) Check engine oil filter and oil tubes
for leakage or damage.
(3) If engine oil filter is damaged, replace
engine oil filter (para 3-4).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-88
2-88
2-88
2-88
2-88

NO

YES

3.

Are oil pan, air
compressor, cylinder
head, or sending unit
free from leaks or
damage?
Damaged oil pan, air
compressor, cylinder
head, or sending unit.

Leaking oil pan, air
compressor, cylinder
head, or sending unit
will cause excessive
oil consumption.

TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

Notify DS Maintenance.

KNOWN INFO

POSSIBLE PROBLEMS

Engine oil level OK.
Engine oil filter and oil
tubes OK.
Engine valve cover
and gasket OK.

Visual inspection

a8. EXCESSIVE ENGINE OIL CONSUMPTION (CONT)
a8. EXCESSIVE ENGINE OIL CONSUMPTION (CONT)
a8. EXCESSIVE ENGINE OIL CONSUMPTION (CONT)
a8. EXCESSIVE ENGINE OIL CONSUMPTION (CONT)
a8. EXCESSIVE ENGINE OIL CONSUMPTION (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-89
2-89
2-89
2-89
2-89

(1) Check oil pan, air compressor,
cylinder head, and sending unit
for leakage or damage.
(2) If oil pan, air compressor, cylinder
head, or sending unit is leaking or
damaged, notify DS Maintenance.
(3) If oil pan, air compressor, cylinder
head and sending unit are free
from leaks and damage, notify DS
Maintenance.
(4) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-90
2-90
2-90
2-90
2-90

START

STE/ICE-R Test #38

Is engine operating
at normal temperature?

NO

YES

1.
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

a9. ENGINE OVERHEATS

If STE/ICE-R confirms
WATER TEMP gage
reading, cooling system
is faulty. If STE/ICE-R
indicates normal
operating temperature,
coolant temperature gage
sensor or WATER TEMP
gage is faulty.

Perform Cooling System
Troubleshooting (d1.
Engine Overheats).

Radiator/engine coolant
level OK.
Engine oil level OK.
Engine oil filter and
oil tubes OK.

POSSIBLE PROBLEMS

Faulty coolant temperature
gage sensor or WATER
TEMP gage.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Perform Electrical System
Troubleshooting (e8. Water
Temperature Gage Does Not
Operate or is Inaccurate).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-91
2-91
2-91
2-91
2-91

STE/ICE-R TEST #38

(1) Hook up STE/ICE-R to DCA.
(2) Press and hold the TEST button on the
STE/ICE-R until -45 to +45 appears in the
display. This will ensure that the test
results are accurate.
(3) Start engine (TM 9-2320-365-10) and raise
engine idle until engine is at normal
operating temperature, 180-205°F
(82-96°C).
(4) Coolant temperature should read between
160-210°F (71-99°C).
(5) Record test results.
(6) If coolant temperature is not 160-210°F
(71-99°C), perform Cooling System
Troubleshooting (d1. Engine Overheats).
(7) If coolant temperature is 160-210°F
(71-99°C), perform Electrical System
Troubleshooting (e8. Water Temperature Gage
Does Not Operate or is Inaccurate).
(8) Shut down engine (TM 9-2320-365-10).
(9) Remove STE/ICE-R from DCA.

NOTE
STE/ICE-R Test #38
measures engine
coolant temperature.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-92
2-92
2-92
2-92
2-92

a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE

START

1.

Exhaust smoke may
be black or gray if
air flow to engine is
restricted.

AIR FILTER RESTRICTION
GAUGE Check

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Does AIR FILTER
RESTRICTION
GAUGE read below
yellow area?

Air cleaner element
serviced by emergency
cleaning.
Air inlet system OK.

Faulty air cleaner.
Clogged air filter.
Damaged manifold hose
and/or flex hose.
Damaged particle
extraction hose.

POSSIBLE PROBLEMS

YES

NO

Service air cleaner or
replace restricted air
hoses (para 4-2).

2.

Is air filter
clean?

NO

YES

Air filter check

Exhaust smoke may be
black or gray if air filter
is clogged.

Air cleaner element
serviced by emergency
cleaning.
Air inlet system OK.
AIR FILTER RESTRICTION
GAUGE OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Clogged air filter.
Damaged manifold
hose or flex hose.
Damaged particle
extraction flex hoses.
Replace air filter
(para 4-2). Go to
step 4 of this fault.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-93
2-93
2-93
2-93
2-93

AIR FILTER RESTRICTION GAUGE CHECK
(1) Check reading on AIR FILTER
RESTRICTION GAUGE.
(2) Press RESET button on AIR FILTER
RESTRICTION GAUGE if reading is
between 15 and 20 (in yellow area) or
above 20 (in red area).
(3) Start engine (TM 9-2320-365-10) and
check AIR FILTER RESTRICTION
GAUGE again.
(4) Shut down engine (TM 9-2320-365-10).

AIR FILTER CHECK

(1) Release three spring latches on intake air
cleaner cover.
(2) Remove intake air cleaner cover.
(3) Remove air filter. Replace air filter
if clogged (para 4-2).
(4) Install air filter.
(5) Install intake air cleaner cover.
(6) Install three spring latches into intake air
cleaner cover.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-94
2-94
2-94
2-94
2-94

3.

YES

NO

Air cleaner element
serviced by emergency
cleaning.
Air inlet system OK.
AIR FILTER RESTRICTION
GAUGE OK.
Air filter OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

4.

YES

NO

KNOWN INFO
TEST OPTIONS
Visual inspection

REASON FOR QUESTION

Notify DS Maintenance.

Damaged turbocharger
tube or turbocharger intake
hose.
Damaged particle
extraction hose.

Is turbocharger tube
or air cleaner flex
hose serviceable?

Exhaust smoke may be
black or gray if
turbocharger tube or
turbocharger intake
hose is kinked or damaged.

Replace turbocharger
tube or turbocharger
intake hose (para 4-2).

Notify DS Maintenance.

Air cleaner element
serviced by emergency
cleaning.
Air inlet system OK.
Air indicator OK.
AIR FILTER RESTRICTION
GAUGE OK.
Turbocharger tube and
turbocharger intake
hose OK.

POSSIBLE PROBLEMS

Damaged particle
extraction hose.

Is particle extraction
hose serviceable?

Exhaust smoke maybe
black or gray if particle
extraction hose is kinked
or damaged.

Replace particle
extraction hose
(para 4-2).

a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT)
a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT)
a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT)
a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT)
a10. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-95
2-95
2-95
2-95
2-95

(1) Raise cab (TM 9-2320-365-10).
(2) Check turbocharger tube and turbocharger intake
hose for kinks and damage.
(3) If turbocharger tube or turbocharger intake hose
is damaged, replace turbocharger tube or
turbocharger intake hose (para 4-2).
(4) If turbocharger tube and turbocharger intake hose
are free from kinks and damage, notify DS
Maintenance.
(5) Lower cab (TM 9-2320-365-10).

(1) Check particle extraction hose for kinks and
damage.
(2) If particle extraction hose is damaged, replace
particle extraction hose (para 4-2).
(3) If particle extraction hose is OK, notify DS
Maintenance.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

START

1.

NO

YES

2.

NO

YES

Is engine oil clean
(contains no
presence of
coolant)?

Engine oil contaminated
with coolant indicates
faulty head gasket
and/or oil cooler.

Contaminated coolant
indicates faulty head
gasket and/or oil
cooler.

Contaminated engine oil.
Contaminated coolant.
Head gasket leaking.

Engine Oil Check

Coolant Check

Contaminated coolant.
Head gasket leaking.

WARNING
Read WARNING
on following page.

Is coolant clean
(contains no oil
and does not
appear milky)?

a11. WHITE EXHAUST SMOKE

TEST OPTIONS

REASON FOR QUESTION

TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

Notify DS Maintenance.

KNOWN INFO

POSSIBLE PROBLEMS

KNOWN INFO

POSSIBLE PROBLEMS

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Air cleaner OK.

Air cleaner OK.
Engine oil OK.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Container (Capacity 40 qt (38L))
Goggles, Industrial (Item 15, Appendix C)

2-96
2-96
2-96
2-96
2-96

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

ENGINE OIL CHECK

(1) Position container under engine oil pan.
(2) Remove drain plug from engine oil pan and
drain engine oil.
(3) Observe condition of engine oil.
(4) If engine oil is not clean, notify DS
Maintenance.
(5) Install drain plug in engine oil pan.
(6) Refill engine with oil (Appendix H).

COOLANT CHECK

WARNING

Do not remove radiator
cap when engine is warm.
Coolant may be very hot
and under pressure.
Failure to comply may
result in injury to
personnel.
(1) Remove radiator cap from radiator overflow
tank.
(2) Observe condition of coolant inside radiator
overflow tank.
(3) If coolant is not clean, notify DS Maintenance.
(4) Install radiator cap on radiator overflow tank.

2-97
2-97
2-97
2-97
2-97

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

NO

YES

3.

Is head gasket
free from leaks?

A faulty head gasket
will cause white exhaust
smoke.

Head Gasket Check

TEST OPTIONS

REASON FOR QUESTION

Head gasket leaking.

Air cleaner OK.
Engine oil OK.
Coolant OK.

Notify DS Maintenance.

Notify DS Maintenance.

KNOWN INFO

POSSIBLE PROBLEMS

a11. WHITE EXHAUST SMOKE (CONT)
a11. WHITE EXHAUST SMOKE (CONT)
a11. WHITE EXHAUST SMOKE (CONT)
a11. WHITE EXHAUST SMOKE (CONT)
a11. WHITE EXHAUST SMOKE (CONT)

2-98
2-98
2-98
2-98
2-98

TM 9-2320-365-20-1

Change 1 2-99

HEAD GASKET CHECK

(1) Start engine (TM 9-2320-365-10).
(2) Raise cab (TM 9-2320-365-10).
(3) Check head gasket for leaks.
(4) If head gasket is leaking, notify DS
Maintenance.
(5) If head gasket is not leaking and white
exhaust smoke still exists, notify DS
Maintenance.
(6) Lower cab (TM 9-2320-365-10).
(7) Shut down engine (TM 9-2320-365-10).

2-100 Change 1

a12. LOW ENGINE POWER

1.
TEST OPTIONS

Visual inspection

REASON FOR QUESTION

NO

TEST OPTIONS

Visual inspection

REASON FOR QUESTION

YES

KNOWN INFO
2.

NO

YES

KNOWN INFO

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.

POSSIBLE PROBLEMS

POSSIBLE PROBLEMS

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.
Fuel hoses OK.

START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)

Materials/Parts
Packing, Preformed (2) (Item 180, Appendix G)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

Is fuel system free from
air leaks at fuel/water
separator?

Air in the fuel system will
cause low engine power.

Leaks or bad bends in fuel
hoses will cause low engine
power.

Faulty fuel hoses between fuel
tank and fuel transfer pump.
Air in fuel system.
Dirty fuel filters.
Faulty fuel pressure
regulating valve.
Restricted or damaged fuel
filter.
Faulty fuel governor.

Air in fuel system.
Dirty fuel filters.
Faulty fuel pressure
regulating valve.
Restricted or damaged fuel
filter.
Faulty fuel governor.
Replace fuel/water
separator (para 4-13).

Replace fuel
hose(s) (para 4-9).

Are fuel hoses between
fuel tank and fuel transfer
pump free of kinks, breaks
and leakage?

(1) Push in fuel primer pump on fuel/water separator.
(2) Pump fuel primer pump until resistance
is felt to purge air from fuel system.
(3) If no resistance is felt, replace fuel/water
separator (para 4-13).

TM 9-2320-365-20-1

Change 1 2-100.1

(1) Raise cab (TM 9-2320-365-10).
(2) Check fuel tank and fuel transfer pump
hoses for kinks, looseness, and leakage.
(3) If fuel hoses are not free from kinks or
leaks, replace fuel hose(s) (para 4-9).

KNOWN INFO
TEST OPTIONS

Remove and inspect

REASON FOR QUESTION

KNOWN INFO

REASON FOR QUESTION

Visual inspection

TEST OPTIONS

NO

YES

YES

NO

POSSIBLE PROBLEMS

4.

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.
Fuel filters clean.

POSSIBLE PROBLEMS

3.

a12. LOW ENGINE POWER (CONT)

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.

Dirty fuel filters.
Faulty fuel pressure
regulating valve.
Restricted or damaged fuel
filter.
Faulty fuel governor.

Are fuel/water separator
filter and fuel filter clean
and clear of debris?

Replace fuel/water separator
filter (para 4-13) and/or fuel
filter (para 4-14).

Dirty or clogged fuel/water
separator filter and/or fuel
filter will cause low engine
power.

A defective or leaking fuel
pressure regulating valve
will cause low engine power.

Is fuel pressure regulating
valve free from leaks or
damage?

Replace fuel pressure
regulating valve (para 4-3).

TM 9-2320-365-20-1

2-100.2 Change 1

Faulty fuel pressure
regulating valve.
Restricted or damaged fuel filter.
Faulty fuel governor.

(1) Check fuel pressure regulating valve for
leaks or damage.
(2) If fuel pressure regulating valve is
damaged, replace fuel pressure regulating
valve (para 4-3).

(1) Check fuel/water separator filter and
fuel filter for dirt and contamination.
(2) Position drain pan under filter.
(3) Remove filter element from base.
(4) Inspect for clogs and debris.
(5) If fuel water separator filter and/or
fuel filter is clogged, replace fuel/water
separator filter (para 4-13) and/or fuel
filter (para 4-14).

Change 1 2-100.3

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

YES
Notify DS Maintenance.

5.

NO

TEST OPTIONS

WARNING
Read WARNING
on following page.

Faulty fuel governor.
Restricted or damaged fuel
filter.

Is outlet pressure of fuel
transfer pump 39-58 psi?

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.
Fuel filters clean.
Fuel pressure regulating valve
OK.

2-100.4 Change 1

TM 9-2320-365-20-1

Low fuel pressure from fuel
transfer pump will cause low
engine power.

REASON FOR QUESTION

Pressure Test or
STE/ICE-R Test #50

a12. LOW ENGINE POWER (CONT)

WARNING

(1) Remove plug from adapter fitting on inlet side
of fuel filter base.
(2) Prepare STE/ICE-R Test #50 (TM 9-4910-571-
12&P) to adapter fitting.
(3) Start engine (TM 9-2320-365-10).
(4) Perform STE/ICE-R Test #50 (TM 9-4910-571-
12&P).
(5) Raise idle speed to 2000 rpm for 10 seconds.
(6) Pressure should read between 39 psi and
58 psi.
(7) Record test results.
(8) Shut down engine (TM 9-2320-365-10).
(9) If pressure is below 39 psi, notify DS
Maintenance.

Diesel fuel is flammable. If fuel is spilled,
clean it up immediately. Failure to comply
may result in serious injury or death to
personnel.

TM 9-2320-365-20-1

Change 1 2-100.5

PRESSURE TEST

KNOWN INFO
TEST OPTIONS
6.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

Fuel OK.
Oil level OK.
Air cleaner OK.
Air system OK.
Fuel hoses OK.
No air in fuel system.
Fuel filters OK.
Fuel pressure regulating valve
OK.
Fuel governor OK.

Restricted or damaged fuel
filter.

Is fuel filter free from
damage or restrictions?

YES
Replace fuel filter
(para 4-14).

NO

Notify DS Maintenance.

TM 9-2320-365-20-1

2-100.6 Change 1

Low fuel pressure from fuel
filter will cause low engine
power.

REASON FOR QUESTION

Pressure Test or
STE/ICE-R Test #50

a12. LOW ENGINE POWER (CONT)

(13) Disconnect STE/ICE-R from adapter fitting.
(14) Remove adapter fitting and preformed
packing from tee fitting. Discard
preformed packing.
(15) Remove plug and preformed packing
from tee fitting on inlet side of fuel filter
base. Discard preformed packing.
(16) Install preformed packing, adapter fitting,
and plug in tee fitting on inlet side of
fuel filter base.
(17) Install preformed packing and plug in tee
fitting on outlet side of fuel filter base.
(18) Lower cab (TM 9-2320-365-10).

(1) Remove plug from tee fitting on outlet
side of fuel filter base.
(2) Remove adapter fitting from tee fitting on
inlet side of fuel filter base.
(3) Install plug in tee fitting on inlet side of
fuel filter base.
(4) Install adapter fitting in tee fitting on
outlet side of fuel filter base.
(5) Prepare STE/ICE-R Test #50
(TM 9-4910-571-12&P) to adapter fitting.
(6) Start engine (TM 9-2320-365-10).
(7) Perform STE/ICE-R Test #50
(TM 9-4910-571-12&P).
(8) Raise idle speed to 2000 rpm for 10
seconds.
(9) Pressure should read between 39 psi
and 58 psi.
(10) Record test results.
(11) Shut down engine (TM 9-2320-365-10).
(12) If test results indicate more than 10 psi
pressure difference from results of step 5
of this fault, replace fuel filter (para 4-14).

WARNING

Diesel fuel is flammable. If fuel is spilled,
clean it up immediately. Failure to comply
may result in serious injury or death to
personnel.

Change 1 2-100.7/(2-100.8 Blank)

TM 9-2320-365-20-1

PRESSURE TEST

TM 9-2320-365-20-1

2-13. FUEL SYSTEM TROUBLESHOOTING

This paragraph covers Fuel System Troubleshooting. The Fuel System Fault Index, Table 2-4, lists faults for the fuel
system of the vehicle.

Table 2-4. Fuel System Fault Index

Fault No.
Description
Page

b1.
Engine Cranks But Does Not Start or Engine Stalls After Starting . . . . . . . . . . . . . . . . . . . . . . . 2-102

b2.
Ether Starting Aid Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-108

b3.
Fuel Consumption Too High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112

b4.
Accelerator Pedal Sticks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-114

Change 1
2-101

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING

NOTE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Cab Raised (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Pan, Drain (Item 24, Appendix C)

Materials/Parts
Ties, Cable, Plastic (Item 76, Appendix D)
Packing, Preformed (Item 157, Appendix G)
Packing, Preformed (2) (Item 180, Appendix G)

KNOWN INFO
TEST OPTIONS

Visual inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

WARNING
Read WARNING
on following page.
1.

START

YES
Go to step 4
of this fault.

NO

If engine cranks but does not start
perform Engine Troubleshooting
(a2. Engine Cranks But Does Not
Start) prior to beginning this task.

Fuel contaminated.
Faulty fuel return hose.
Faulty fuel transfer hose.
Faulty fuel transfer pump.
Faulty fuel tubes.
Faulty fuel filter.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty fuel supply hose.
Faulty fuel tank.
Faulty fuel/water separator.
Faulty cylinder head.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Does fuel flow from fuel
pressure regulating valve?

TM 9-2320-365-20-1

2-102 Change 1

Post signs that read "NO SMOKING
WITHIN 50 FEET" when working with
open fuel, fuel lines, or open fuel
tanks. Failure to comply may result
in injury to personnel or damage to
equipment.

WARNING

Diesel fuel is flammable. If fuel is
spilled, clean up immediately. Failure
to comply may result in serious injury
or death to personnel.

NOTE

Remove plastic cable ties as required.

(1) Perform Fuel System Bleeding (para 4-11).
(2) If fuel flow is not present from fuel pressure
regulating valve, go to step 4 of this fault.
(3) If fuel flow is present, collect fuel sample.

Change 1 2-103

TM 9-2320-365-20-1

Is fuel free from water,
debris, and contamination?

2.
TEST OPTIONS

REASON FOR QUESTION

Visual inspection

YES
Replace fuel return
hose (para 4-9).

Notify DS Maintenance.

KNOWN INFO

YES
flush fuel system.

NO

WARNING
Read WARNING
on following page.
3.

Is fuel return hose free
from kinks, blockage,
or damage?

KNOWN INFO
TEST OPTIONS

Visual inspection

REASON FOR QUESTION

NO

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

Contaminated fuel may cause
engine to stall after starting.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel transfer hose OK.
Fuel tubes OK.
Fuel filter OK.
Fuel pressure regulating
valve OK.
Orifice tube assembly OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Cylinder head OK.
Fuel contaminant free.

Faulty return hose.
Faulty fuel transfer pump.

If fuel return hose is OK,
fuel transfer pump is faulty.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel transfer hose OK.
Fuel tubes OK.
Fuel filter OK.
Fuel pressure regulating
valve OK.
Orifice tube assembly OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Cylinder head OK.

Fuel contaminated.
Faulty return hose.
Faulty fuel transfer pump.

2-104 Change 1

TM 9-2320-365-20-1

(1) Check fuel sample from step 1 for water,
debris, and contamination.
(2) If fuel is not free from contamination, flush
fuel tank, fuel hoses, and replace fuel filters.

WARNING

Compressed air used for cleaning purposes
will not exceed 30 psi (207 Kpa). Use only
with effective chip guarding and personal
protective equipment (goggles/shield, gloves,
etc). Failure to comply may result in injury to
personnel.

Diesel fuel is flammable. If fuel is spilled,
clean it up immediately. Failure to comply
may result in serious injury or death to
personnel.

(1) Disconnect fuel return hose from fuel
pressure regulating valve.
(2) Disconnect fuel return hose from fuel tank.
(3) Apply compressed air to one end of fuel
return hose.
(4) If compressed air does not flow freely
through fuel return hose, replace fuel
return hose (para 4-9).
(5) If compressed air flows freely through
fuel return hose, notify DS Maintenance.
(6) Connect fuel return hose to fuel pressure
regulating valve.
(7) Connect fuel return hose to fuel tank.

Change 1 2-105

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

4.
Visual inspection

KNOWN INFO

This question eliminates
possible problems and
determines where
troubleshooting continues.

Does fuel flow from
fuel/water separator?

TEST OPTIONS

REASON FOR QUESTION

Visual inspection
5.

Does fuel flow from
fuel transfer hose?

KNOWN INFO

POSSIBLE PROBLEMS

NO

YES

NO

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

YES
Replace fuel transfer
hose (para 4-9).

TM 9-2320-365-20-1

2-106 Change 1

Faulty fuel transfer hose.
Faulty fuel transfer pump.
Faulty fuel tubes.
Faulty fuel filter.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty fuel supply hose.
Faulty fuel tank.
Faulty fuel/water separator.
Faulty cylinder head.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.

Faulty fuel transfer hose.
Faulty fuel transfer pump.
Faulty fuel tubes.
Faulty fuel filter.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.

If fuel does not flow from fuel
transfer hose, fuel transfer
hose is faulty.

Go to step 12 of this fault.

TM 9-2320-365-20-1

Change 1 2-106.1

(1) Disconnect fuel transfer hose from fuel/
water separator.
(2) Depress button on fuel/water separator as
many times as necessary to get a steady
stream of clear fuel.
(3) If fuel does not flow from fuel/water
separator, go to step 12 of this fault.
(4) Connect fuel transfer hose to fuel/water
separator.

(1) Disconnect fuel transfer hose from fuel
transfer pump.
(2) Depress button on fuel/water separator
as many times as necessary to get a
steady stream of clear fuel.
(3) If fuel does not flow from fuel transfer hose,
replace fuel transfer hose (para 4-9).
(4) Connect fuel transfer hose to fuel transfer
pump.

TEST OPTIONS

REASON FOR QUESTION

Visual inspection
6.
KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO
7.

YES
Notify DS Maintenance.

NO

YES

Replace fuel tube from
fuel filter base to fuel
transfer pump (para 4-10).

NO

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

TM 9-2320-365-20-1

2-106.2 Change 1

Does fuel flow from fuel
transfer pump?

Faulty fuel transfer pump.
Faulty fuel tubes.
Faulty fuel filter.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer hose OK.

If fuel does not flow from fuel
transfer pump, fuel transfer
pump is faulty.

If fuel does not flow from fuel
tube, fuel tube is faulty.

Does fuel flow from fuel
tube?

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer hose OK.
Fuel transfer pump OK.

POSSIBLE PROBLEMS

Faulty fuel tubes.
Faulty fuel filter.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

TM 9-2320-365-20-1

Change 1 2-106.3

(1) Remove plug from adapter fitting on inlet
side of fuel filter base.
(2) Depress button on fuel/water separator
as many times as necessary to get a
steady stream of clear fuel.
(3) If fuel does not flow from fuel tube, replace
fuel tube from fuel filter base to fuel
transfer pump (para 4-10).
(4) Install plug in adapter fitting on inlet side
of fuel filter base.

(1) Disconnect fuel tube from fuel transfer
pump. discard preformed packing.
(2) Depress button on fuel/water separator as
many times as necessary to get a steady
stream of clear fuel.
(3) If fuel does not flow from fuel transfer
pump, notify DS Maintenance.
(4) Install preformed packing and fuel tube on
fuel transfer pump.

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO

POSSIBLE PROBLEMS
NO

8.

YES
Replace fuel filter
(para 4-14).

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO

POSSIBLE PROBLEMS

NO

9.

YES

Replace fuel tube from
fuel filter base to engine
head (para 4-10).

TM 9-2320-365-20-1

Faulty fuel filter.
Faulty fuel tube.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

If fuel does not flow from
fuel filter, fuel filter is faulty.

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer pump OK.
Fuel transfer hose OK.

Does fuel flow from fuel
filter?

Does fuel flow from fuel
tube?

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer hose OK.
Fuel transfer pump OK.
Fuel filter OK.

Faulty fuel tube.
Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

If fuel does not flow from fuel
tube, fuel tube is faulty.

2-106.4 Change 1

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

TM 9-2320-365-20-1

Change 1 2-106.5

(1) Disconnect fuel tube from cylinder head.
Discard preformed packing.
(2) Depress button on fuel/water separator
as many times as necessary to get a
steady stream of clear fuel.
(3) If fuel does not flow from fuel tube, replace
fuel tube from fuel filter base to cylinder
head (para 4-10).
(4) Install preformed packing and fuel tube
on cylinder head.

(1) Remove plug and preformed packing
from tee fitting on outlet side of fuel
filter base. discard preformed packing.
(2) Depress button on fuel/water separator
as many times as necessary to get a
steady stream of clear fuel.
(3) If fuel does not flow from fuel filter,
replace fuel filter (para 4-14).
(4) Install preformed packing and plug in
tee fitting on outlet side of fuel filter base.

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO
10.

NO

YES

Replace fuel pressure
regulating valve (para 4-3).

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

TM 9-2320-365-20-1

2-106.6 Change 1

Faulty fuel pressure
regulating valve.
Faulty orifice tube assembly.
Faulty cylinder head.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer pump OK.
Fuel transfer hose OK.
Fuel filter OK.
Fuel tube OK.

Does fuel flow from orifice
tube?
If fuel flows from orifice tube,
fuel pressure regulating valve
is faulty.

Go to step 11 of this fault.

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO
11.

Faulty orifice tube assembly.
Faulty cylinder head.

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel supply hose OK.
Fuel tank OK.
Fuel/water separator OK.
Fuel transfer pump OK.
Fuel transfer hose OK.
Fuel filter OK.
Fuel tube OK.
Fuel pressure regulating
valve OK.

If fuel flow is not present,
cylinder head is faulty.
If fuel flow is present, orifice
tube assembly is faulty.

Replace orifice tube
assembly (para 4-7).

YES
Notify DS Maintenance.

NO

Does fuel flow from cylinder
head?

TM 9-2320-365-20-1

Change 1 2-106.7

(1) Remove orifice tube assembly (para 4-7).
(2) Depress button on fuel/water separator as
many times as necessary to get a steady
stream of clear fuel.
(3) If fuel does not flow from cylinder head,
notify DS Maintenance.
(4) If fuel flow is present, replace orifice tube
assembly (para 4-7).
(5) Install orifice tube assembly (para 4-7).
(6) Install fuel pressure regulating valve (para
4-3).

(1) Remove fuel pressure regulating valve (para
4-3).
(2) Depress button on fuel/water separator as
many times as necessary to get a steady
stream of clear fuel.
(3) If fuel does not flow from orifice tube, go to
step 11 of this fault.
(4) If fuel flow is present, replace fuel pressure
regulating valve (para 4-3).

b1. ENGINE CRANKS BUT DOES NOT START OR ENGINE STALLS AFTER STARTING (CONT)

TM 9-2320-365-20-1

2-106.8 Change 1

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

KNOWN INFO

WARNING
Read WARNING
on following page.
12.

KNOWN INFO
13.
Visual inspection

REASON FOR QUESTION

TEST OPTIONS

WARNING
Read WARNING
on following page.

If compressed air does not
flow freely through fuel pick-up
tube, fuel tank is faulty. If
compressed air flows freely
through fuel pick-up tube,
fuel/water separator is faulty.

Replace fuel/water
separator (para 4-13).

YES
Replace fuel tank
(para 4-8).

NO

POSSIBLE PROBLEMS

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel transfer pump OK.
Fuel transfer hose OK.
Fuel filter OK.
Fuel tube OK.
Fuel pressure regulating
valve OK.
Orifice tube assembly OK.
Cylinder head OK.
Fuel supply hose OK.

Faulty fuel tank.
Faulty fuel/water separator.

Is fuel pick-up tube free
from blockage or damage?

POSSIBLE PROBLEMS

Faulty fuel supply hose.
Faulty fuel tank.
Faulty fuel/water separator.

Is fuel supply hose free from
kinks, blockage, or damage?
If compressed air does not flow
freely through fuel supply
hose, fuel supply hose is
faulty.

YES
Replace fuel supply hose
(para 4-9).

NO

Malfunction in fuel system.
Engine cranking speed OK.
Fuel return hose OK.
Fuel transfer pump OK.
Fuel transfer hose OK.
Fuel filter OK.
Fuel tube OK.
Fuel pressure regulating
valve OK.
Orifice tube assembly OK.
Cylinder head OK.

TM 9-2320-365-20-1

Change 1 2-107

WARNING

Compressed air used for cleaning purposes
will not exceed 30 psi (207 Kpa). Use only
with effective chip guarding and personal
protective equipment (goggles/shield, gloves,
etc). Failure to comply may result in injury to
personnel.

(1) Disconnect fuel supply hose from fuel/water
separator.
(2) Disconnect fuel supply hose from
fuel tank.
(3) Apply compressed air to one end of
fuel supply hose.
(4) If compressed air does not flow freely
through fuel supply hose, replace fuel
supply hose (para 4-9).
(5) Connect fuel supply hose to
fuel/water separator.

(1) Remove fuel cap from fuel tank.
(2) Apply compressed air to 90° degree
fitting on fuel tank and listen for air
bubbles in fuel tank.
(3) If air flow is not present, replace
fuel tank (para 4-8).
(4) If air flow is present, replace fuel/water
separator (para 4-13).
(5) Connect fuel supply hose to fuel tank.
(6) Install fuel cap on fuel tank.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-108
2-108
2-108
2-108
2-108

1.

START

Nothing

NO

YES

2.

NO

YES

b2. ETHER STARTING AID DOES NOT OPERATE

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Is there an adequate
supply of ether and is
ether cylinder secure
and free from damage?

No ether will be available
to start engine if ether
cylinder is empty.

Ether cylinder OK.

WARNING
Read WARNING
on following page.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Spare tire lowered (TM 9-2320-365-10).

Empty, leaking, or
damaged ether cylinder.
Faulty ether valve.
Ether hose loose.

Ether Cylinder Inspection

Ether Valve Test

Ether valve and/or
electrical system is faulty
if click is not heard when
ether start switch is
pressed.

Does ether valve
operate properly?

Faulty ether valve.
Ether hose loose.

Replace ether
cylinder (para 4-15).

Perform Electrical System
Troubleshooting (e92. Ether
Start Does Not Operate).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-109
2-109
2-109
2-109
2-109

WARNING

Starting fluid is toxic and highly
flammable. Container is pressurized.
NEVER heat container and NEVER
discharge starting fluid in confined
areas or near open flame. Failure to
comply may result in serious injury
or death to personnel.

NOTE
Temperature at engine block
must be below 100° F
(38° C) before ether starting
aid will work.

ETHER CYLINDER INSPECTION

ETHER VALVE TEST

(1) Position master power switch to on (TM
9-2320-365-10).
(2) Press ether start switch (TM 9-2320-365-10)
and listen for ether valve to click.
(3) Position master power switch to off (TM
9-2320-365-10).

(1) Remove ether cylinder (para 4-15).
(2) Shake ether cylinder to determine
if ether is present.
(3) Check ether cylinder for damage.
(4) Install ether cylinder (para 4-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-110
2-110
2-110
2-110
2-110

YES

NO

3.
KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Ether hose loose.

Visual inspection

Ether will not go into
engine if it is leaking
from ether hose. Replace
ether hose if kinked,
cracked, leaking, or
damaged.

Is ether hose between
ether cylinder and
engine in good
condition, free from
kinks, cracks,
leakage, or damage?

Replace ether hose.

Notify DS Maintenance.

Ether cylinder OK.
Ether valve OK.

b2. ETHER STARTING AID DOES NOT OPERATE (CONT)
b2. ETHER STARTING AID DOES NOT OPERATE (CONT)
b2. ETHER STARTING AID DOES NOT OPERATE (CONT)
b2. ETHER STARTING AID DOES NOT OPERATE (CONT)
b2. ETHER STARTING AID DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-111
2-111
2-111
2-111
2-111

(1) Raise cab (TM 9-2320-365-10).
(2) Check ether hose between ether cylinder and
engine for leaks and damage.
(3) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

START

1.

Damaged fuel tank.

NO

YES

A leaking fuel tank
will cause high fuel
consumption.

Is fuel tank free from
leaks?

b3. FUEL CONSUMPTION TOO HIGH

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Visual inspection
Secondary fuel filter,
fuel hoses, fittings, and
draincocks OK.

Notify DS Maintenance.

Replace fuel tank
(para 4-8).

WARNING
Read WARNING
on following page.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

2-112
2-112
2-112
2-112
2-112

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

WARNING

(1) Check fuel tank for damage, and for loose
or missing mounting hardware.
(2) If fuel tank is damaged, replace fuel tank
(para 4-8).

Diesel fuel is flammable.
If fuel is spilled, clean it
up immediately. Failure to
comply may result in serious
injury or death to personnel.

2-113
2-113
2-113
2-113
2-113

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-114
2-114
2-114
2-114
2-114

1.

START

Nothing

NO

YES

TEST OPTIONS
KNOWN INFO

POSSIBLE PROBLEMS

b4. ACCELERATOR PEDAL STICKS

Faulty accelerator pedal.
Faulty fuel control
linkage.

Does fuel control
linkage return to normal
position after snap test?

Fuel Control Linkage
Return Test

REASON FOR QUESTION

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

If fuel control linkage
returns to normal
position after snap test,
accelerator pedal is
faulty.

Go to step 2 of this fault.

Replace accelerator pedal
(para 4-21).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

FUEL CONTROL LINKAGE RETURN TEST

(1) Disconnect accelerator pedal from throttle control
threaded rod (para 4-21).
(2) Pull down throttle control threaded rod and
release.
(3) If throttle control threaded rod snapped back to
normal position, replace accelerator pedal
(para 4-21).
(4) If throttle control threaded rod did not snap back
to normal position, go to step 2 of this fault.
(5) Connect accelerator pedal to throttle control
threaded rod (para 4-21).

2-115
2-115
2-115
2-115
2-115

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-116
2-116
2-116
2-116
2-116

Faulty fuel control
linkage.

Missing hardware
or damage to the
fuel control linkage
will cause the
engine to overspeed.

NO

Is fuel control
linkage secure
and free from
damage?

YES

Visual inspection
TEST OPTIONS
KNOWN INFO

POSSIBLE PROBLEMS
REASON FOR QUESTION

Accelerator pedal OK.
2.

Fault corrected.

Replace missing
hardware or damaged
linkage (para 4-12, 4-17,
4-18, 4-19, and/or 4-20).

b4. ACCELERATOR PEDAL STICKS (CONT)
b4. ACCELERATOR PEDAL STICKS (CONT)
b4. ACCELERATOR PEDAL STICKS (CONT)
b4. ACCELERATOR PEDAL STICKS (CONT)
b4. ACCELERATOR PEDAL STICKS (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

(1) Remove instrument panel assembly (para 7-15).
(2) Check fuel control linkage for improper
assembly, missing hardware, damaged parts,
and proper lubrication (para 4-17, 4-19, and
4-20).
(3) Install instrument panel assembly (para 7-15).
(4) Raise cab (TM 9-2320-365-10).
(5) Check fuel control linkage for improper
assembly, missing hardware, and damaged
parts (para 4-16, 4-12, and 4-18).
(6) Lower cab (TM 9-2320-365-10).

2-117/(2-118 Blank)
2-117/(2-118 Blank)
2-117/(2-118 Blank)
2-117/(2-118 Blank)
2-117/(2-118 Blank)

TM 9-2320-365-20-1

2-14. EXHAUST SYSTEM TROUBLESHOOTING

This paragraph covers Exhaust System Troubleshooting. The Exhaust System Fault Index, Table 2-5, lists faults for
the exhaust system of the vehicle.

Table 2-5. Exhaust System Fault Index

Fault No.
Description
Page

c1.
Exhaust System Unusually Noisy or Vibrates Excessively During Engine Operation . . . . . . . . . . 2-120

c2.
Exhaust Fumes in Cab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-124

Change 1
2-119

TM 9-2320-365-20-1

c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE
OPERATION

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Cab raised (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Goggles, Industrial (Item 15, Appendix C)

KNOWN INFO

Nothing

Loose or leaking tailpipe,
muffler, exhaust junction to
muffler pipe, exhaust pipe
bracket assembly(s), engine to
junction exhaust pipe, or loop
clamp halves.
Loose or leaking exhaust
manifold.

POSSIBLE PROBLEMS

1.

Are the tailpipe, muffler,
exhaust junction to muffler
pipe, exhaust pipe bracket
assembly(s), engine to
junction exhaust pipe, and
loop clamp halves secure
and free from damage?

WARNING
Read WARNING
on following page.

START

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

Engine may operate with
excessive noise or vibration if
tailpipe, muffler, exhaust
junction to muffler pipe,
exhaust pipe bracket
assembly(s), engine to junction
exhaust pipe, or loop clamp
halves are loose or damaged.

Tighten connection(s) or replace leaking or
damaged component(s) (para 5-2 thru 5-4).
YES

NO

2-120

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-121
2-121
2-121
2-121
2-121

Ensure exhaust system
is cool before performing
maintenance. Failure to
comply may result in
injury to personnel.

WARNING

NOTE

Exhaust system component
hardware has to be torqued.
Refer to para 5-2 thru 5-4.

Check tailpipe, muffler, and
exhaust pipes for loose connections
and damage.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-122
2-122
2-122
2-122
2-122

2.

Engine may operate with
excessive noise or
vibration when exhaust
manifold is loose or
leaking.

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

Visual inspection

Notify DS Maintenance.

POSSIBLE PROBLEMS

Loose or leaking exhaust
manifold.

Tailpipe, muffler,
exhaust junction to
muffler pipe, exhaust
pipe bracket assembly(s),
engine to junction
exhaust pipe, and clamp
halves OK.

Is exhaust
manifold free from
leaks or damage?

c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE OPERATION
c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE OPERATION
c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE OPERATION
c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE OPERATION
c1. EXHAUST SYSTEM UNUSUALLY NOISY OR VIBRATES EXCESSIVELY DURING ENGINE OPERATION
(WITHOUT EXHAUST RESTRICTOR) (CONT)
(WITHOUT EXHAUST RESTRICTOR) (CONT)
(WITHOUT EXHAUST RESTRICTOR) (CONT)
(WITHOUT EXHAUST RESTRICTOR) (CONT)
(WITHOUT EXHAUST RESTRICTOR) (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-123
2-123
2-123
2-123
2-123

(1) Start engine (TM 9-2320-365-10).
(2) Check exhaust manifold for looseness
or evidence of exhaust leakage.
(3) Shut down engine (TM 9-2320-365-10).
(4) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

c2. EXHAUST FUMES IN CAB

1.

START

Nothing

2.

NO

YES

NO

YES

Tighten connection(s) or
replace leaking
component(s) (para
5-2 thru 5-4).

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Visual inspection

Are engine to
junction exhaust pipe,
muffler, and tailpipe
secure and free from
damage?

Exhaust fumes may enter
cab if engine to junction
exhaust pipe, muffler,
or tailpipe are loose or
damaged.

Engine to junction
exhaust pipe,
muffler, and tailpipe OK.

POSSIBLE PROBLEMS

Visual inspection

WARNING
Read WARNING
on following page.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Loose or leaking engine to
junction exhaust pipe,
muffler, or tailpipe.
Loose or leaking junction
to muffler exhaust pipe.
Loose or leaking exhaust
manifold.

Loose or leaking junction
to muffler exhaust pipe.
Loose or leaking exhaust
manifold.

Is junction to muffler
exhaust pipe free
from damage or leaks?

Exhaust fumes may enter
cab if junction to muffler
exhaust pipe is loose or
leaking.

Replace junction to
muffler exhaust pipe
(para 5-3).

2-124
2-124
2-124
2-124
2-124

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

WARNING

Ensure exhaust system
is cool before performing
maintenance. Failure to
comply may result in
injury to personnel.

NOTE

Exhaust system component
hardware has to be torqued.
Refer to para 5-2 thru 5-4.

Check junction to muffler exhaust pipe,
muffler, and tailpipe for loose connections
and leaks.

Check engine to junction exhaust pipe for
loose connections or leaks.

2-125
2-125
2-125
2-125
2-125

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

NO

YES

3.

Exhaust fumes may enter
cab if exhaust manifold
is loose or leaking.

Is the exhaust
manifold free from
damage or leaks?

Loose or leaking exhaust
manifold.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Notify DS Maintenance.

Notify DS Maintenance.

Visual inspection
Engine to junction
exhaust pipe, muffler,
and tailpipe OK.
Junction to muffler
exhaust pipe OK.

c2. EXHAUST FUMES IN CAB (WITHOUT EXHAUST RESTRICTOR) (CONT)
c2. EXHAUST FUMES IN CAB (WITHOUT EXHAUST RESTRICTOR) (CONT)
c2. EXHAUST FUMES IN CAB (WITHOUT EXHAUST RESTRICTOR) (CONT)
c2. EXHAUST FUMES IN CAB (WITHOUT EXHAUST RESTRICTOR) (CONT)
c2. EXHAUST FUMES IN CAB (WITHOUT EXHAUST RESTRICTOR) (CONT)

2-126
2-126
2-126
2-126
2-126

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

(1) Raise cab (TM 9-2320-365-10).
(2) Start engine (TM 9-2320-365-10).
(3) Check exhaust manifold for looseness
or leaks.
(4) Shut down engine (TM 9-2320-365-10).
(5) Lower cab (TM 9-2320-365-10).

2-127/(2-128 Blank)
2-127/(2-128 Blank)
2-127/(2-128 Blank)
2-127/(2-128 Blank)
2-127/(2-128 Blank)

TM 9-2320-365-20-1

2-15. COOLING SYSTEM TROUBLESHOOTING

This paragraph covers Cooling System Troubleshooting. The Cooling System Fault Index, Table 2-6, lists faults for
the cooling system of the vehicle.

Table 2-6. Cooling System Fault Index

Fault No.
Description
Page

d1.
Engine Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-130
d2.
Oil in Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-142
d3.
Loss of coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-144

Change 1
2-129

TM 9-2320-365-20-1

2-130 Change 2

d1. ENGINE OVERHEATS

1.
KNOWN INFO
TEST OPTIONS

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Replace radiator (para 6-2).

Visual Inspection

REASON FOR QUESTION

If leaks or damage are present,
radiator is faulty.

Is radiator secure and free
from damage?

POSSIBLE PROBLEMS

Personnel Required
(2)

START

NOTE

Faulty radiator.
Faulty upper and lower coolant
hoses.
Faulty radiator cap.
Faulty radiator overflow tank
and hoses.
Loss of pressure in cooling
system.
Faulty radiator fan shroud.
Faulty water pump.
Faulty thermostat.
Faulty fan clutch.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Test Kit, Radiator (Item 40.1, Appendix C)
Pressure Tester, Radiator (Item 26, Appendix C)
Pan, Drain (Item 24, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Perform Engine System Troubleshooting a9. Engine
Overheats prior to beginning this task.

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.

Do not pressurize over 16 psi (110 kPa).
Failure to comply may result in damage
to cooling system.

CAUTION

(6) Pressurize radiator overflow tank, using
tester, to 15 psi (103 kPa).
(7) Observe radiator for coolant leaks.

Change 1 2-131

(1) Raise cab (TM 9-2320-365-10).
(2) Check radiator for leaks and damage.
(3) Remove radiator cap from radiator overflow
tank.
(4) Install test kit on radiator overflow tank.
(5) Install radiator tester on test kit.

NOTE

Pressure loss without external leaks
indicates engine internal coolant leaks.

(8) Observe radiator tester for loss of pressure.
(9) If leaks or damage are present, replace
radiator (para 6-2).

WARNING

Coolant may be very hot and under pressure
from engine operation. Ensure engine is cool
before performing troubleshooting. Failure to
comply may result in injury to personnel.

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

NO

YES

2.

POSSIBLE PROBLEMS

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Does cooling system
maintain pressure?

d1. ENGINE OVERHEATS (CONT)

TM 9-2320-365-20-1

Faulty upper and lower coolant
hoses.
Faulty radiator cap.
Faulty radiator overflow tank
and hoses.
Loss of pressure in cooling
system.
Faulty radiator fan shroud.
Faulty water pump.
Faulty thermostat.
Faulty fan clutch.

Go to step 7 of this fault.

2-132 Change 2

WARNING

CAUTION

(1) Pressurize radiator overflow tank, using
tester, to 15 psi (103 kPa).
(2) Observe radiator overflow tank for coolant
leaks.

NOTE

Do not pressurize over 16 psi (110 kPa).
Failure to comply may result in damage
to cooling system.

Coolant may be very hot and under pressure
from engine operation. Ensure engine is cool
before performing troubleshooting. Failure to
comply may result in injury to personnel.

Pressure loss without external leaks
indicates engine internal coolant leaks.

Change 2 2-133

(3) Observe radiator tester for loss of
pressure.
(4) If cooling system does not maintain
pressure, go to step 7 of this fault.
(5) Remove tester and test kit from radiator
overflow tank.
(6) Install radiator cap on radiator overflow
tank.

TM 9-2320-365-20-1

d1. ENGINE OVERHEATS (CONT)

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

POSSIBLE PROBLEMS

3.

NO

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.

Is radiator fan shroud secure
and free from damage?
If damage is present, radiator
fan shroud is faulty.

YES

Tighten radiator fan shroud
hardware or replace radiator
fan shroud (para 6-4).

Faulty radiator fan shroud.
Faulty water pump.
Faulty thermostat.
Faulty fan clutch.

2-134 Change 2

(1) Check radiator fan shroud for loose
hardware and damage.
(2) If radiator fan shroud hardware is loose,
tighten hardware.
(3) If radiator fan shroud is damaged, replace
radiator fan shroud (para 6-4).

TM 9-2320-365-20-1

Change 2 2-135

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

Visual Inspection

YES

NO

NO

YES

WARNING
Read WARNING
on following page.

d1. ENGINE OVERHEATS (CONT)

Tighten water pump
hardware or replace water
pump (para 6-12).

Is water pump secure and
free from damage?
If damage is present, water
pump is faulty.

Does thermostat operate
properly?

REASON FOR QUESTION

If thermostat does not operate
properly, thermostat is faulty.

TM 9-2320-365-20-1

Replace thermostat
(para 6-5).

4.

5.

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.

POSSIBLE PROBLEMS

Faulty water pump.
Faulty thermostat.
Faulty fan clutch.

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.
Water pump OK.

POSSIBLE PROBLEMS

Faulty thermostat.
Faulty fan clutch.

2-136 Change 2

WARNING

Coolant may be very hot and under pressure
from engine operation. Ensure engine is cool
before performing troubleshooting. Failure to
comply may result in injury to personnel.

(1) Remove coolant hose from overflow tank to
radiator (para 6-3).
(2) Place coolant hose in drain pan.
(3) Start engine (TM 9-2320-365-10).

WARNING

NOTE

Coolant flowing constantly through return
hose indicates closed thermostat.

(4) Observe flow of coolant from coolant hose.
(5) If thermostat does not operate properly,
replace thermostat (para 6-5).
(6) Shut down engine (TM 9-2320-365-10).
(7) Install coolant hose on overflow tank and
radiator (para 6-3).
(8) Refill overflow tank to proper level (TM 9-
2320-365-10).
(9) Lower cab (TM 9-2320-365-10).

Change 1 2-137

TM 9-2320-365-20-1

Use care when opening door with cab raised.
Failure to comply may result in injury to
personnel or damage to equipment.

(1) Check water pump for loose hardware and
damage.
(2) If water pump hardware is loose, tighten
hardware.
(3) If water pump is damaged, replace water
pump (para 6-12).

d1. ENGINE OVERHEATS (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

Visual Inspection

REASON FOR QUESTION
Does fan clutch spin freely
without air applied?

TM 9-2320-365-20-1

6.

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.
Water pump OK.
Thermostat OK.

POSSIBLE PROBLEMS

Faulty fan clutch.

Notify DS Maintenance.

Replace fan clutch
(para 6-14).

If fan clutch spins freely
without air pressure applied,
fan clutch is faulty.

2-138 Change 2

TM 9-2320-365-20-1

(1) Remove two screws and washers from
front grille.
(2) Remove screw and washer from front
grille.
(3) Remove front grille from cab.
(4) Disconnect air hose from fan clutch.
(5) Check to see if fan clutch turns freely.
(6) If fan clutch turns freely without air
applied, replace fan clutch (para 6-14).
(7) Connect air hose to fan clutch.
(8) Position front grille on cab with washer
and screw.
(9) Position two washers and screws in front
grille.
(10) Tighten screw to 48-60 lb-in. (5-7 N∙m).
(11) Tighten two screws to 24 lb-in. (3 N∙m).

Change 2 2-139

KNOWN INFO
TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
Visual Inspection

REASON FOR QUESTION
Does cooling system leak
externally?
If external leaks are present,
upper coolant hose, lower
coolant hose, radiator overflow
tank hose(s), or radiator
overflow tank is faulty.

Perform Cooling System Troubleshooting
(d2. Oil in Cooling System).

Replace upper coolant hose (para 6-9),
lower coolant hose (para 6-10), radiator
overflow tank hose(s), or radiator overflow
tank (para 6-3).

NO

TM 9-2320-365-20-1

7.

Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Loss of pressure in cooling
system.
Radiator fan shroud OK.
Water pump OK.
Thermostat OK.
Fan clutch OK.

POSSIBLE PROBLEMS

Faulty upper and lower coolant
hoses.
Faulty radiator cap.
Faulty radiator overflow tank
and hoses.

2-140 Change 2

d1. ENGINE OVERHEATS (CONT)

WARNING

Coolant may be very hot and under pressure
from engine operation. Ensure engine is cool
before performing troubleshooting. Failure to
comply may result in injury to personnel.

CAUTION

Do not pressurize over 16 psi (110 kPa).
Failure to comply may result in damage
to cooling system.

(1) Pressurize radiator overflow tank, using
tester, to 15 psi (103 kPa).
(2) Observe hoses for coolant leaks.

NOTE

Pressure loss without external leaks
indicates engine internal coolant leaks.

(3) Observe radiator tester for loss of pressure.
(4) If no external leaks are present, perform
Cooling System Troubleshooting (d2. Oil
in Cooling System).
(5) If external leaks are present, replace upper
coolant hose (para 6-10), radiator overflow
tank hose(s), or radiator overflow tank
(para 6-3).
(6) Remove tester and test kit from radiator
overflow tank.
(7) Install radiator cap on radiator overflow
tank.

Change 1 2-141

TM 9-2320-365-20-1

d2. OIL IN COOLING SYSTEM

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10)
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)

1.

START

KNOWN INFO

Nothing.

POSSIBLE PROBLEMS

Faulty transmission oil cooler.
Faulty engine head gasket.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

Leaking or damaged
transmission oil cooler will
allow oil to enter cooling
system.

NO

YES

NO

YES
Replace transmission oil
cooler (para 8-10).

2.
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Transmission oil cooler OK.

Faulty engine head gasket.
Leaking or damaged engine
head gasket will allow oil to
enter cooling system.

WARNING
Read WARNING
on following page.

Is transmission oil dipstick
free of any signs of being
milky and over HOT FULL
line?

Is engine oil dipstick free
of any signs of being milky
and over FULL line?

TM 9-2320-365-20-1

2-142 Change 1

Notify DS Maintenance.

Notify DS Maintenance.

(1) Start engine (TM 9-2320-365-10).
(2) Check transmission oil dipstick for signs of
oil being milky and over HOT FULL line.
(3) If transmission oil dipstick shows oil level
over HOT FULL line and milky, replace
transmission oil cooler (para 8-10).
(4) Shut down engine (TM 9-2320-365-10).

NOTE

Perform transmission oil check when
engine is at normal operating temperature
(160°F-230°F (71°C-110°C)).

(1) Raise cab (TM 9-2320-365-10).
(2) Check engine oil dipstick for signs of being
milky and over FULL line.
(3) If engine oil dipstick shows engine oil to be
milky and over FULL line, notify DS
Maintenance.
(4) If engine oil dipstick shows engine oil
appears normal and not over FULL line,
notify DS Maintenance.
(5) Lower cab (TM 9-2320-365-10).

Engine oil dipstick is located close to
starter solenoid connections which are
24 VDC and high amperage. Use caution
removing/installing engine oil dipstick to
prevent shorting across starter solenoid
connections. Failure to comply may result
in serious injury or death to personnel
or damage to equipment.

WARNING

Change 1 2-143

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

1.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

START

TEST OPTIONS

YES

NO

d3. LOSS OF COOLANT

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Test Kit, Radiator (P/N 4910-00-728-8227)
Pressure Tester, Radiator (Item 26, Appendix C)
Goggles, Industrial (Item 15, Appendix C)

Nothing.
Visual Inspection and
Cooling System Pressure Test
REASON FOR QUESTION

Leaking or damaged radiator,
radiator overflow tank, or
coolant hoses and tubes
will cause a loss of coolant.

Are radiator, radiator
overflow tank, and coolant
hoses and tubes free
from leaks or external
damage?

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Faulty radiator.
Faulty radiator overflow tank.
Faulty coolant hose or tube.
External leaks or damage to
engine oil cooler.
External leaks or damage to
transmission oil cooler.
Faulty water pump.
Faulty transmission oil cooler.

Replace radiator (para 6-2),
radiator overflow tank (para 6-3),
upper coolant tube(s) or hose(s)
(para 6-9), or lower coolant
hose (para 6-10).

TM 9-2320-365-20-1

2-144 Change 1

COOLING SYSTEM PRESSURE TEST

CAUTION

NOTE

Coolant may be very hot
and under pressure from
engine operation. Ensure
engine is cool before
performing maintenance.
Failure to comply may
result in injury to personnel.

WARNING

(4) Pressurize radiator overflow tank, using
tester, to 15 psi (103 kPa).
(5) Observe radiator and radiator overflow
tank for coolant leaks.

Do not pressurize over
16 psi (110 kPa). Failure
to comply may result in
damage to cooling system.

Pressure loss without
external leaks indicates
internal coolant leaks.

(1) Raise cab (TM 9-2320-365-10).
(2) Check radiator, radiator overflow tank,
and coolant hoses and tubes for leaks
and damage.

(1) Remove radiator cap from radiator overflow
tank.
(2) Install test kit on radiator overflow tank.
(3) Install pressure tester on test kit.

(6) Observe radiator tester for loss of pressure.
(7) Remove pressure tester and test kit from
radiator overflow tank.
(8) Install radiator cap on radiator overflow
tank.

Change 1 2-144.1

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

2.

Is engine oil cooler
free from external
leaks or damage?

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

3.

Is transmission oil
cooler free from external
leaks or damage?

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

Notify DS Maintenance.

YES

Replace transmission
oil cooler (para 8-10).

d3. LOSS OF COOLANT (CONT)

NO

NO

Radiator OK.
Radiator overflow tank OK.
Air coolant hoses and tubes
OK.

Leaking or damaged engine
oil cooler will cause a loss
of coolant.

Leaking or damaged
transmission oil cooler
will cause a loss of coolant.

Visual Inspection

Visual Inspection
Radiator OK.
Radiator overflow tank OK.
All coolant hoses and tubes OK.
Engine oil cooler free from
external leaks or damage.

External leaks or damage to
engine oil cooler.
External leaks or damage to
transmission oil cooler.
Faulty water pump.
Faulty transmission oil cooler.

TM 9-2320-365-20-1

2-144.2 Change 1

External leaks or damage to
transmission oil cooler.
Faulty water pump.
Faulty transmission oil cooler.

WARNING

TM 9-2320-365-20-1

Change 1 2-144.3

Wear appropriate eye protection when working
under vehicle due to the possibility of falling
debris. Failure to comply may result in injury
to personnel.

(1) Check transmission oil cooler for obvious
signs of damage and leakage.
(2) If leaks or damage are noted, replace
transmission oil cooler (para 8-10).
(3) Lower cab (TM 9-2320-365-10).

(1) Check engine oil cooler for leaks and obvious
signs of damage.
(2) If leaks or damage are noted, notify DS
Maintenance.

KNOWN INFO

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

YES

POSSIBLE PROBLEMS

Is water pump free
from leaks or damage?

Replace water pump
(para 6-12).

4.

5.

POSSIBLE PROBLEMS

Replace transmission
oil cooler (para 8-10).

d3. LOSS OF COOLANT (CONT)

NO

NO

Radiator OK.
Radiator overflow tank OK.
All coolant hoses and tubes
OK.
Engine oil cooler free from
external leaks or damage.
Transmission oil cooler free
from external leaks or damage.

TEST OPTIONS

Visual Inspection

Leaking or damaged water
pump will cause a loss of
coolant.

Visual Inspection

Leaking or damaged
transmission oil cooler
will cause a loss of coolant.

Notify DS Maintenance.

Faulty water pump.
Faulty transmission oil cooler.

Radiator OK.
Radiator overflow tank OK.
All coolant hoses and tubes OK.
Engine oil cooler free from
external leaks or damage.
Transmission oil cooler free
from external leaks or damage.
Water pump OK.

Is transmission oil dipstick
free of any signs of being
over HOT FULL line,
discolored, or milky?

TM 9-2320-365-20-1

2-144.4 Change 1

Faulty transmission oil cooler.

TM 9-2320-365-20-1

Change 1 2-145/(2-146 Blank)

(1) Start engine (TM 9-2320-365-10).
(2) Check water pump for obvious signs of
damage and leakage.
(3) If leaks or damage are found, replace
water pump (para 6-12).
(4) Shut down engine (TM 9-2320-365-10).

NOTE

Perform transmission oil check when engine
is at normal operating temperature (160°F-
230°F (71°C-110°C)).

(1) Start engine (TM 9-2320-365-10).
(2) Check transmission oil dipstick for signs of
being over HOT FULL line, discolored, or
milky.
(3) If signs of being over HOT FULL line,
discolored, or milky are found, replace
transmission oil cooler (para 8-10).
(4) If no signs of being over HOT FULL line,
discolored, or milky are found, notify
DS Maintenance.
(5) Shut down engine (TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 2 2-147

2-16. ELECTRICAL SYSTEM TROUBLESHOOTING

This paragraph covers Electrical System Troubleshooting. The Electrical System Fault Index, Table 2-7, lists faults for
the electrical system of the vehicle.

Table 2-7. Electrical System Fault Index

Fault No.
Description
Page

e1.
Circuit Breaker Does Not Operate......................................................................................................2-150

e2.
Engine Does Not Crank.....................................................................................................................2-154

e3.
12 VDC and/or 24 VDC Circuits Do Not Operate..................................................................................2-254

e4.
24 VDC Circuits Do Not Operate........................................................................................................2-258
e5.
Deleted............................................................................................................................................2-276

e6.
Engine Cranks But Does Not Start .....................................................................................................2-300

e7.
FUEL Gage Does Not Operate or Is Inaccurate...................................................................................2-308

e8.
WATER TEMP Gage Does Not Operate or Is Inaccurate......................................................................2-314

e9.
REAR BRAKE AIR Pressure Gage Does Not Operate or Is Inaccurate..................................................2-318

e10.
FRONT BRAKE AIR Pressure Gage Does Not Operate or Is Inaccurate................................................2-322

e11.
Engine Oil Pressure Gage Does Not Operate or Is Inaccurate...............................................................2-326

e12.
Speedometer Does Not Operate or Is Inaccurate.................................................................................2-332

e13.
VOLTS Gage Does Not Operate or Is Inaccurate.................................................................................2-346

e14.
Tachometer Does Not Operate or Is Inaccurate...................................................................................2-348

e15.
Audible Alarm Does Not Operate .......................................................................................................2-358

e16.
Troop Transport Audible Alarm Does Not Operate................................................................................2-362

e16A.
Master Power Switch Does Not Shut Down Engine...........................................................................2-370.4

e16B.
Lamp Test Switch Does Not Illuminate .......................................................................................... 2-370.10

e17.
Radiator Fan Off Switch Does Not Illuminate.......................................................................................2-372

e17A.
Ether Start Switch Does Not Illuminate...............................................................................................2-376

e17B.
Hazard Lights Switch Does Not Illuminate........................................................................................2-376.4

e17C.
Amber Warning Light Switch Does Not Illuminate.............................................................................2-376.8

e17D.
Master Power Switch Does Not Illuminate...................................................................................... 2-376.12

e18.
REAR BRAKE AIR Gage Does Not Illuminate.....................................................................................2-378

e18A.
FUEL Gage Does Not Illuminate .....................................................................................................2-380.2

e18B.
FRONT BRAKE AIR Gage Does Not Illuminate................................................................................2-380.6

e18C.
Speedometer Does Not Illuminate................................................................................................. 2-380.10

e18D.
VOLTS Gage Does Not Illuminate................................................................................................. 2-380.14

e18E.
WATER TEMP Gage Does Not Illuminate...................................................................................... 2-380.18

e19.
OIL PRESS Gage Does Not Illuminate ...............................................................................................2-382

e20.
Auxiliary Panel, Personnel Heater, and Instrument Panel Do Not Illuminate ...........................................2-386

e21.
Tachometer Does Not Illuminate ........................................................................................................2-390

e22.
Auxiliary Panel Switch Does Not Illuminate.........................................................................................2-394

e23.
Auxiliary Panel Does Not Illuminate....................................................................................................2-398

e24.
High Engine Temperature Indicator Does Not Operate..........................................................................2-402

e24A.
High Engine Temperature Indicator Illuminates .................................................................................2-408.2

e25.
CTIS Overspeed Indicator Does Not Operate.......................................................................................2-410

e26.
Chemical Detector Indicator Does Not Operate....................................................................................2-424

e27.
Left Turn Signal Indicator Does Not Operate........................................................................................2-428

e28.
Right Turn Signal Indicator Does Not Operate......................................................................................2-432

e29.
Turn Signal Indicators and High Beams On Indicator Do Not Operate....................................................2-438

e30.
High Beams On Indicator Does Not Operate.......................................................................................2-440

e31.
Parking Brake Indicator and/or Emergency Brake Indicator Does Not Illuminate.....................................2-444

e32.
PTO Indicator Does Not Operate........................................................................................................2-460

e33.
Fan Off Indicator Does Not Operate....................................................................................................2-472

TM 9-2320-365-20-1

2-16. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT)

Table 2-7. Electrical System Fault Index (Cont)

Fault No.
Description
Page

e34.
WTEC II Transmission Temperature Indicator Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . 2-478

e35.
WTEC III Transmission Temperature Indicator Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . 2-486

e36.
Front Brake Air Indicator Does Not Illuminate When Air Pressure is Below 65 PSI . . . . . . . . . . . 2-492

e37.
Rear Brake Air Indicator Does Not Illuminate When Air Pressure is Below 65 PSI . . . . . . . . . . . 2-498

e38.
Engine Oil Pressure Indicator Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-504

e39.
Master Stop Indicator Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-510

e40.
One or Both Headlights (High and Low Beams) Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . 2-512

e41.
One or Both Headlight Low Beams Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-520

e42.
One or Both Headlight High Beams Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-526

e43.
Parking Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-534

e44.
LH Door and/or LH Front Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-542

e45.
RH Door and/or RH Front Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-552

e46.
One or More Cab Top Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-562

e47.
Side and/or Rear Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-576

e47A.
All Marker Lights Do Not Illuminate in Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-584.52

e48.
One or Both Composite Taillights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-586

e49.
One or Both Front Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-596

e50.
Blackout Drive Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-606

e51.
One or Both Rear Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-616

e52.
Warning Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-626

e53.
Backup Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-638

e54.
Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-676

e54A.
Front Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-678

e55.
Rear Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-680

e56.
Front and Rear Hazard Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-682

e57.
Front and Rear Turn Signals Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-690

e58.
Left or Right Front Turn Signals Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-702

e59.
One or Both Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-710

e60.
One or Both Blackout Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-728

e61.
Stoplights and Blackout Stoplights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-740

e62.
Trailer Marker/Taillights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-750

e63.
Trailer Right Stop/Turn Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-760

e64.
Trailer Left Stop/Turn Light Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-770

e65.
Trailer Blackout Marker Lights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-780

e66.
Trailer Blackout Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-790

e67.
Intervehicle Clearance Lights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-800

e68.
Intervehicle Left Turn Signal Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-804

e69.
Intervehicle Right Turn Signal Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-810

e70.
Intervehicle Stoplights Do Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-816

e71.
Intervehicle Taillights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-822

e72.
Personnel Heater Control Illumination Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-826

e73.
Personnel Heater Fan Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-832

e74.
Windshield Washer Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-838

e75.
Windshield Wiper Does Not Operate On Low Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-850

e76.
All Windshield Wiper Speeds Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-858

e77.
Windshield Wiper Does Not Operate On Intermittent Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-864

e78.
Windshield Wiper Does Not Operate On High Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-874

2-148
Change 1

TM 9-2320-365-20-1

Table 2-7. Electrical System Fault Index (Cont)

Fault No.
Description
Page

e79.
Horn Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-880

e80.
Chemical Alarm Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-892

e81.
Chemical Detector Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-900

e82.
Central Tire Inflation System (CTIS) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-906

e83.
CTIS Does Not Inflate Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-920

e84.
CTIS Does Not Deflate Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-930

e85.
11K Self-Recovery Winch (SRW) Does Not Reel In or Pay Out . . . . . . . . . . . . . . . . . . . . . . . . . 2-940

e86.
11K Self-Recovery Winch (SRW) Does Not Reel In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-946

e87.
11K Self-Recovery Winch (SRW) Does Not Pay Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-958

e88.
PTO Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-970

e89.
Electrical System Does Not Maintain a Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1010

e90.
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) Illumination Does Not Dim . . . 2-1018

e91.
Engine Fan Runs Constantly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1028

e92.
Engine Fan Does Not Turn Off Using Radiator Fan Off Switch . . . . . . . . . . . . . . . . . . . . . . . . 2-1036

e93.
Ether Start Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1044

e94.
Excessive Condensation in Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1060

e95.
Radio Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1064

e96.
Start Inhibit Pushbutton Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1070

e97.
Air Dryer Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1076

e98.
Battery Tester Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1082

Volume 2

e99.
M1079 Fan Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1088
e100.
All M1079 Van Body Marker Lights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1100
e101.
M1079 Van Body Clearance Marker Light Does Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . .
2-1104
e102.
All M1079 Fluorescent Lights Do Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1108
e103.
M1079 Lighting Fixture(s) DS80 and/or DS81 Do Not Operate
. . . . . . . . . . . . . . . . . . . . . . . .
2-1118
e104.
M1079 Lighting Fixture(s) DS82 and/or DS83 Do Not Operate
. . . . . . . . . . . . . . . . . . . . . . . .
2-1134
e105.
M1079 110 VAC Outlet J233 Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1152
e106.
M1079 110 VAC Outlet J234 Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1160
e107.
M1079 110 VAC Outlet J235 Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1168
e108.
M1079 110 VAC Outlet J232 Does Not Operate in Normal Mode
. . . . . . . . . . . . . . . . . . . . . .
2-1176
e109.
M1079 110 VAC Outlet J232 and J233 Do Not Operate in Blackout Override Mode . . . . . . . . .
2-1190
e110.
M1079 110 VAC Outlet J231 Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1194
e111.
M1079 110 VAC Outlet J230 Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1208
e112.
M1079 Blackout Light(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1222
e113.
M1079 Emergency Light(s) Does Not Illuminate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1230
e114.
M1079 Field Phone 1 and/or 2 Binding Post Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . .
2-1244
e115.
M1079 Air Conditioner Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1264
e116.
M1079 Heater Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1276
e117.
M1079 24 VDC Binding Post(s) Does Not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1296
e118.
M1079 Van Door Open Light Does Not Illuminate and Audible Alarm Does Not Operate . . . . . .
2-1324
e119.
M1079 110 VAC Power Does Not Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1338
e120.
M1079 Fluorescent Lights Do Not Operate in Blackout Override Mode . . . . . . . . . . . . . . . . . . .
2-1352

Change 1
2-149

e1. CIRCUIT BREAKER DOES NOT OPERATE

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Nothing.

POSSIBLE PROBLEMS

Faulty circuit breaker.

Continuity Test or
STE/ICE-R Test #91

1.

WARNING
Read WARNING
on following page.

START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Replace circuit breaker (para 7-9).
YES

NO

If continuity is not present,
circuit breaker is faulty.

Circuit breaker is OK. Return to
troubleshooting for affected circuit.

TM 9-2320-365-20-1

2-150 Change 1

Is continuity present
through circuit breaker
(refer to Table 2-8.
Function To Circuit Breaker
Cross Reference or Table
2-8.1. Circuit Breaker to
Function Cross Reference)?

TM 9-2320-365-20-1

Change 1 2-151

Figure 2-1. Circuit Breaker Locations

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CONTINUITY TEST

(1) Remove Power Distribution Panel (PDP)
cover (para 16-2).
(2) Locate circuit breaker to be tested on PDP
(refer to Figure 2-1. Circuit Breaker
Locations and Table 2-8. Function to
Circuit Breaker Cross Reference or Table
2-8.1. Circuit Breaker to Function Cross
Reference).
(3) Check reset button on circuit breaker. If
button is up (circuit breaker tripped), press
button to reset.
(4) Remove circuit breaker to be tested from
PDP.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to one circuit breaker terminal.
(7) Connect negative (-) probe of multimeter to
other circuit breaker terminal and note
reading on multimeter.
(8) If continuity is not present, replace circuit
breaker (para 7-9).
circuit.
(10) Install tested circuit breaker in PDP.
(11) Install PDP cover (para 16-2).

WARNING

OK. Return to troubleshooting for affected
(9) If continuity is present, circuit breaker is

Circuit Breaker / AMP
Function
Circuit Breaker / AMP
Function

10 AMP Fuse WTEC II
Transmission ECU Pushbutton
Shift Selector (TEPSS)

CB79 / 15

12 VDC Intervehicular Left Turn
Signal

12 VDC Intervehicular Marker
Lights

12 VDC Intervehicular Right Turn
Signal

12 VDC Intervehicular Stoplight

12 VDC Intervehicular Taillights

24 VDC Intervehicular Blackout
Clearance

24 VDC Intervehicular Blackout
Stoplight

24 VDC Intervehicular Clearance
and Rear Light
CB41 / 15

CB39 / 10

CB42 / 10

24 VDC Intervehicular Auxiliary
CB76 / 15

CB80 / 25

CB76 / 15

CB76 / 15

CB67 / 25

CB76 / 15

e1. CIRCUIT BREAKER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1

2-152 Change 1

24 VDC Intervehicular Left and
Right Turn Signals and Stoplights
(WTEC III)

CB44 / 15

24 VDC Intervehicular Left
Blackout Marker

24 VDC Intervehicular Right
Blackout Marker

Air Dryer
CB21 / 15

CB42 / 10

CB44 / 15

CB43 / 15

CB42 / 10

24 VDC Intervehicular Left Turn
Signal and Stoplight (WTEC II)

24 VDC Intervehicular Right Turn
Signal and Stoplight (WTEC II)

Backup Light
CB73 / 8

Blackout Drive Light
CB54 / 8

CB72 / 15
Blackout Override Switch

Blackout Override Switch Light

Cab Radio
CB20 / 25

CB70 / 20

Central Tire Inflation System
(CTIS)
CB40 / 10

CB40 / 10

CB40 / 10
Central Tire Inflation System
(CTIS) Overspeed Indicator Light

Central Tire Inflation System
(CTIS) Air Pressure Switch

CB30 / 10
Chemical Alarm

CB30 / 10

CB30 / 10

Chemical Detector

Chemical Detector Indicator Light

CB70 / 20

CB70 / 20

CB70 / 20

CB70 / 20

Circuit Breaker CB54

Circuit Breaker CB65

Circuit Breaker CB66

Circuit Breaker CB74

Circuit Breaker CB76

CB70 / 20

CB77 / 10
Emergency Brake Indicator Light

CB77 / 10
Engine Fan Off Indicator Light

CB70 / 20

All Marker Lights

Audible Alarm
CB77 / 10

CB67 / 25

Table 2-8. Function to Circuit Breaker Cross Reference
Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)

Dimmer Module

Function
Circuit Breaker / AMP
Function
Circuit Breaker / AMP

Change 1 2-152.1

TM 9-2320-365-20-1

Engine Fan Off Switch (Fan)
CB22 / 10

Engine Fan Off Switch (Indicator
Light)
CB77 / 10

CB70 / 20

CB77 / 10

Engine Fan Solenoid
CB22 / 10

CB77 / 10
Engine Oil Pressure Indicator Light

CB77 / 10
Engine Oil Pressure Sensor

Engine Oil Pressure Switch

Engine Oil Pressure Gage

CB70 / 20
Engine Oil Pressure Gage Light

Ether Start Solenoid

Ether Start Switch

CB22 / 10

CB22 / 10

CB70 / 20
Ether Start Switch Light

CB21 / 15
Frequency Divider

CB77 / 10
Front Brake Air Indicator Light

Front Brake Air Indicator Light
Switch
CB77 / 10

Ether Sensor

CB77 / 10

CB22 / 10

Engine Fan Off Switch Light

Front Brake Air Pressure
Transmitter
CB77 / 10

Front Left Blackout Marker
CB66 / 8

Front Brake Air Pressure Gage
Light
CB70 / 20

CB77 / 10
Front Brake Air Pressure Gage

Front Left Turn Signal
CB76 / 15

Front Left Parking Light
CB65 / 8

Front Right Blackout Marker
CB66 / 8

Front Right Parking Light
CB65 / 8

Front Right Turn Signal
CB76 / 15

Fuel Gage
CB77 / 10

Fuel Gage Light
CB70 / 20

CB77 / 10
Fuel Level Sensor

Fuel Solenoid
CB79 / 15

Fuel Water Solenoid
CB49 / 15

Hazard Warning Switch
CB71 / 15

Hazard Warning Switch
CB76 / 15

Hazard Warning Switch Light
CB70 / 20

CB70 / 20
Headlight Dimmer Switch

Headlight HI Beam Indicator Light
CB78 / 15

Horn
CB36 / 20

Lamp Test Switch Light

Left Blackout Stoplight
CB76 / 15

CB78 / 15
Left Headlight

CB70 / 20

Left Rear Composite Lamp
Taillight
CB80 / 25

Left Turn Signal Indicator Light
CB76 / 15

CB77 / 10

Main Light Switch
CB70 / 20

CB70 / 20
Master Power Switch

Master Power Switch Light
CB70 / 20

Magnetic Pickup

Master Stop Indicator Light
CB77 / 10

Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)
Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)

Circuit Breaker / AMP
Function
Circuit Breaker / AMP
Function

e1. CIRCUIT BREAKER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1

2-152.2 Change 1

CB77 / 10
Parking Brake Switch

Personnel Heater
CB23 / 15

Personnel Heater Lights
CB70 / 20

Parking Brake Indicator Light
CB77 / 10

Power Take-Off (PTO) Indicator
Light
CB77 / 10

CB77 / 10

CB49 / 15

Power Take-Off (PTO) Pressure
Switch

Power Take-Off (PTO) Solenoid

CB49 / 15
Power Take-Off (PTO) Switch

Power Take-Off (PTO) Switch
Light
CB70 / 20

Rear Brake Air Indicator Light

Rear Brake Air Indicator Light
Switch

Rear Brake Air Pressure Gage

CB77 / 10

CB77 / 10

CB77 / 10

Rear Brake Air Pressure
Transmitter
CB77 / 10

Rear Left Composite Lamp Turn
Signal
CB76 / 15

Rear LH Blackout Marker
CB66 / 8

CB66 / 8
Rear RH Blackout Marker

Rear Right Composite Lamp Turn
Signal
CB76 / 15

Right Blackout Stoplight
CB76 / 15

CB70 / 20
Rear Brake Air Pressure Gage Light

Rotating Warning Light Switch

Rotating Warning Light Switch
Light
CB70 / 20

CB70 / 20

Speedometer
CB77 / 10

CB70 / 20
Speedometer Light

Start Inhibit Pushbutton Switch
CB79 / 15

Starter Pushbutton Switch
CB21 / 15

Stoplight Switches
CB76 / 15

Tachometer
CB77 / 10

Tachometer Light
CB70 / 20

Transmission Temperature
Indicator Light
CB77 / 10

Troop Transport Alarm Switch
CB77 / 10

CB71 / 15
Turn Signal Flasher ECU

Turn Signal Flasher ECU
CB74 / 10

Van Door Indicator Light
CB77 / 10

Van Door Switch

Voltmeter
CB77 / 10

CB70 / 20
Voltmeter Light

CB50 / 15

Right Rear Composite Lamp
Taillight
CB80 / 25

Right Turn Signal Indicator Light
CB76 / 15

Rotating Warning Light

Right Headlight
CB78 / 15

CB38 / 20

Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)
Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)

Change 1 2-152.3

TM 9-2320-365-20-1

Circuit Breaker / AMP
Function

CB77 / 10

CB70 / 20
Water Temperature Gage Light

Water Temperature Gage

Water Temperature Indicator Light
CB77 / 10

Water Temperature Sensor
CB77 / 10

CB77 / 10
Water Temperature Switch

Water Temperature Switch (Fan)
CB22 / 10

CB49 / 15

CB49 / 15

Winch In Solenoid

Winch In/Out Switch

Winch In/Out Switch Light
CB70 / 20

CB49 / 15

CB49 / 15

Winch Out Solenoid

Winch Switch

Winch Switch Light
CB70 / 20

CB37 / 20
Windshield Wiper ECU

CB37 / 20
Wiper Motor

WTEC II Transmission ECU
Pushbutton Shift Selector (TEPSS)

WTEC II Vehicle Interface Module
(VIM)

WTEC II / WTEC III Transmission
Pushbutton Shift Selector (TPSS)
Dimmer Module

WTEC III Transmission ECU

CB35 / 15

CB35 / 15

CB66 / 8

WTEC III Transmission ECU
CB79 / 15

CB43 / 15

Table 2-8. Function to Circuit Breaker Cross Reference
(Cont)

e1. CIRCUIT BREAKER DOES NOT OPERATE (CONT)

Function

Ether Start Solenoid

Ether Start Switch

Ether Sensor

CB22 / 10

CB22 / 10

CB22 / 10

Water Temperature Switch (Fan)
CB22 / 10

Personnel Heater
CB23 / 15

Chemical Alarm

Chemical Detector

Chemical Detector Indicator Light

CB30 / 10

CB30 / 10

CB30 / 10

WTEC II Transmission ECU
Pushbutton Shift Selector (TEPSS)

WTEC II Vehicle Interface Module
(VIM)

CB35 / 15

CB35 / 15

Horn
CB36 / 20

Windshield Wiper ECU
CB37 / 20

Wiper Motor
CB37 / 20

Cab Radio
CB20 / 25

CB21 / 15

Function
Circuit Breaker / AMP

Frequency Divider
CB21 / 15

Air Dryer

Starter Pushbutton Switch
CB21 / 15

Engine Fan Off Switch (Fan)
CB22 / 10

Engine Fan Solenoid
CB22 / 10

TM 9-2320-365-20-1

2-152.4 Change 1

Central Tire Inflation System
(CTIS) Overspeed Indicator Light

24 VDC Intervehicular Clearance
and Rear Light
CB41 / 15

24 VDC Intervehicular Blackout
Clearance

24 VDC Intervehicular Left
Blackout Marker
CB42 / 10

CB42 / 10

CB40 / 10

CB40 / 10

24 VDC Intervehicular Right
Blackout Marker
CB42 / 10

CB43 / 15

CB43 / 15
WTEC III Transmission ECU

24 VDC Intervehicular Left Turn
Signal and Stoplight (WTEC II)

24 VDC Intervehicular Left and
Right Turn Signals and Stoplights
(WTEC III)

CB44 / 15

CB44 / 15

Fuel Water Solenoid
CB49 / 15

Power Take-Off (PTO) Solenoid

Power Take-Off (PTO) Switch

CB49 / 15

CB49 / 15

Winch In Solenoid

Winch In/Out Switch

CB49 / 15

CB49 / 15

Winch Out Solenoid
CB49 / 15

24 VDC Intervehicular Right Turn
Signal and Stoplight (WTEC II)

Circuit Breaker / AMP

Central Tire Inflation System
(CTIS) Air Pressure Switch

Central Tire Inflation System
(CTIS)
CB40 / 10

Rotating Warning Light
CB38 / 20

24 VDC Intervehicular Blackout
Stoplight
CB39 / 10

Table 2-8.1. Circuit Breaker to Function Cross Reference
Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)

Function
Circuit Breaker / AMP

TM 9-2320-365-20-1

Change 1 2-152.5

Function
Circuit Breaker / AMP

Front Brake Air Pressure Gage
Light
CB70 / 20

CB54 / 8

CB66 / 8

Rear LH Blackout Marker
CB66 / 8

CB66 / 8

WTEC II / WTEC III Transmission
Pushbutton Shift Selector (TPSS)
Dimmer Module

CB66 / 8

CB67 / 25
All Marker Lights

12 VDC Intervehicular Marker
Lights
CB67 / 25

Rear RH Blackout Marker

Circuit Breaker CB54

Circuit Breaker CB65

Circuit Breaker CB66

Circuit Breaker CB74

Circuit Breaker CB76

CB70 / 20

CB70 / 20

CB70 / 20

CB70 / 20

CB70 / 20

CB70 / 20

Blackout Override Switch Light
CB70 / 20

CB70 / 20
Engine Fan Off Switch Light

Engine Oil Pressure Gage Light
CB70 / 20

Ether Start Switch Light
CB70 / 20

Front Right Parking Light
CB65 / 8

Front Left Blackout Marker
CB66 / 8

CB65 / 8
Front Left Parking Light

Blackout Drive Light

Van Door Switch
CB50 / 15

Front Right Blackout Marker

CB49 / 15
Winch Switch

Fuel Gage Light
CB70 / 20

Voltmeter Light
CB70 / 20

Water Temperature Gage Light
CB70 / 20

Winch Switch Light
CB70 / 20

Winch In/Out Switch Light
CB70 / 20

Rotating Warning Light Switch

Rotating Warning Light Switch
Light
CB70 / 20

CB70 / 20

Speedometer Light
CB70 / 20

Tachometer Light
CB70 / 20

Backup Light
CB73 / 8

Blackout Override Switch
CB72 / 15

Hazard Warning Switch
CB71 / 15

Turn Signal Flasher ECU
CB71 / 15

Hazard Warning Switch Light

Headlight Dimmer Switch

CB70 / 20

CB70 / 20

Lamp Test Switch Light
CB70 / 20

Main Light Switch
CB70 / 20

Master Power Switch

Master Power Switch Light

CB70 / 20

CB70 / 20

Personnel Heater Lights
CB70 / 20

Power Take-Off (PTO) Switch
Light
CB70 / 20

CB70 / 20
Rear Brake Air Pressure Gage Light

Turn Signal Flasher ECU
CB74 / 10

Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)
Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)

Dimmer Module

e1. CIRCUIT BREAKER DOES NOT OPERATE (CONT)

Circuit Breaker / AMP
Function
Function
Circuit Breaker / AMP

TM 9-2320-365-20-1

12 VDC Intervehicular Right Turn
Signal

12 VDC Intervehicular Stoplight
CB76 / 15

CB76 / 15

12 VDC Intervehicular Left Turn
Signal
CB76 / 15

24 VDC Intervehicular Auxiliary
CB76 / 15

Front Right Turn Signal
CB76 / 15

Front Left Turn Signal
CB76 / 15

Left Blackout Stoplight
CB76 / 15

Hazard Warning Switch
CB76 / 15

Left Turn Signal Indicator Light
CB76 / 15

Right Turn Signal Indicator Light
CB76 / 15

Rear Right Composite Lamp Turn
Signal

Right Blackout Stoplight

CB76 / 15

CB76 / 15

Rear Left Composite Lamp Turn
Signal
CB76 / 15

Emergency Brake Indicator Light

Engine Fan Off Indicator Light

CB77 / 10

CB77 / 10

Engine Fan Off Switch (Indicator
Light)
CB77 / 10

Engine Oil Pressure Gage
CB77 / 10

Engine Oil Pressure Indicator Light
CB77 / 10

CB77 / 10
Audible Alarm

Stoplight Switches
CB76 / 15

Power Take-Off (PTO) Indicator
Light
CB77 / 10

Parking Brake Switch
CB77 / 10

Rear Brake Air Indicator Light

Rear Brake Air Indicator Light
Switch

Rear Brake Air Pressure Gage

CB77 / 10

CB77 / 10

CB77 / 10

Power Take-Off (PTO) Pressure
Switch
CB77 / 10

Rear Brake Air Pressure
Transmitter
CB77 / 10

Speedometer
CB77 / 10

Tachometer
CB77 / 10

Front Brake Air Pressure Gage
CB77 / 10

Front Brake Air Pressure
Transmitter

Fuel Gage
CB77 / 10

Fuel Level Sensor
CB77 / 10

Parking Brake Indicator Light
CB77 / 10

Master Stop Indicator Light
CB77 / 10

CB77 / 10
Magnetic Pickup

Engine Oil Pressure Sensor

Engine Oil Pressure Switch

CB77 / 10

Front Brake Air Indicator Light

Front Brake Air Indicator Light
Switch
CB77 / 10

CB77 / 10

CB77 / 10

CB77 / 10

2-152.6 Change 1

Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)
Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)

TM 9-2320-365-20-1

Change 1 2-153

Function
Circuit Breaker / AMP

Transmission Temperature
Indicator Light

Troop Transport Alarm Switch

CB77 / 10

CB77 / 10

Voltmeter
CB77 / 10

CB77 / 10
Van Door Indicator Switch

Water Temperature Gage
CB77 / 10

Water Temperature Indicator Light

Water Temperature Sensor

Water Temperature Switch

CB77 / 10

CB77 / 10

CB77 / 10

Left Headlight
CB78 / 15

Headlight HI Beam Indicator Light
CB78 / 15

Right Headlight
CB78 / 15

CB79 / 15

10 AMP Fuse WTEC II
Transmission ECU Pushbutton
Shift Selector (TEPSS)

CB79 / 15
Fuel Solenoid

Start Inhibit Pushbutton Switch
CB79 / 15

WTEC III Transmission ECU
CB79 / 15

Right Rear Composite Lamp
Taillight
CB80 / 25

Left Rear Composite Lamp
Taillight
CB80 / 25

12 VDC Intervehicular Taillights
CB80 / 25

Table 2-8.1. Circuit Breaker to Function Cross Reference
(Cont)

KNOWN INFO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Visual Inspection

If vehicle is equipped with
connector P81, perform
Thermal Switch Bypass
procedure. If vehicle is not
equipped with connector P81,
continue with step 2 of this
fault.

e2. ENGINE DOES NOT CRANK

NOTE

Faulty starting motor.
Faulty auxiliary starter
solenoid.
Faulty battery to starter cable
assembly.
Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II Vehicle
Interface Module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Perform Thermal Switch Bypass Procedure.

Perform Engine System Troubleshooting a1.
Engine Does Not Crank and Electrical System
Troubleshooting e1. Circuit Breaker Does Not
Operate on circuit breakers CB21 and CB77
prior to beginning this task.

Remove and install plastic cable ties as
required.

START

NO

YES
Go to step 2 of this fault.

Is vehicle equipped with
connector P81?

1.

WARNING
Read WARNING
on following page.

INTIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Cab raised (TM 9-2320-365-10).
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wire, Elect, 50 ft (Item 77, Appendix D)
Wire, Relay Test (Item 9, Appendix E)

Materials/Parts
Ties, Cable, Plastic (Item 76, Appendix D)
Adhesive (Item 8, Appendix D)
Dispenser, Pressure Sensitive Adhesive Tape
(Item 21, Appendix D)
Seal Ring, Metal (Item 251, Appendix G)

Personnel Required
(2)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-154 Change 1

WARNING

Wear appropriate eye protection when working
under vehicle due to the possibility of falling
debris. Failure to comply may result in injury to
personnel.

THERMAL SWITCH BYPASS PROCEDURE

NOTE

(1) If vehicle is not equipped with connector P81
continue with step 2 of this fault.
(2) If vehicle is equipped with connector P81
perform Thermal Switch Bypass Procedure,
see below.
(3) After performing Thermal Switch Bypass
Procedure, attempt to start engine
(TM 9-2320-365-10).
(4) If engine still does not crank, continue with
step 2 of this fault.

NOTE

(10) Cut insulation sleeving 1.5 in. (3.8 cm).
(11) Position insulation sleeving on 4 in.
(10.2 cm) wire.
(12) Install conductor splice on two wires.
(13) Install insulation sleeving on conductor
splice.

Install electrical tape as required.

(14) Install conductor splice in convoluted
tubing.
(15) Lower cab (TM 9-2320-365-10).
(16) Connect batteries (para 7-48).

Change 1 2-155

TM 9-2320-365-20-1

THERMAL SWITCH BYPASS PROCEDURE
(Cont)

The tools and materials are required
to perform the thermal switch bypass:
Heater, Gun type, Electrical (Appendix
B, Item 20)
Tape, Insulation, Electrical (Appendix D,
Item 75)
Splice, Conductor (Item 261, Appendix G)
Insulation, Sleeving, Electrical (1.5 in. or
3.8 cm) (Item 30.1, Appendix D)
(1) Disconnect batteries (para 7-48).
(2) Disconnect connector P81 from thermal
switch connector.
(3) Cut connector P81 from branch of start and
charging cable assembly.
(4) Remove band marker from branch of start
and charging cable assembly.

Remove electrical tape as required.
NOTE

(5) Remove insulation sleeving from convoluted
tubing to body of start and charging cable
assembly.
(6) Remove insulation sleeving from two wires to
body of start and charging cable assembly.

Measure wires from body of start and
charging cable assembly.

(7) Cut one wire 3 in. (7.6 cm).
(8) Cut other wire 4 in. (10.2 cm).
(9) Remove 0.38 in. (1 cm) of insulation from two
wires.

NOTE

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
2.
TEST OPTIONS

Is continuity present from
solenoid left terminal stud
to starting motor ground
terminal stud?

YES

REASON FOR QUESTION
If continuity is not present,
ground wire is faulty.

NO

Continuity Test or
STE/ICE-R Test #91
Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.

Faulty starting motor.
Faulty auxiliary starter
solenoid.
Faulty battery to starter cable
assembly.
Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

POSSIBLE PROBLEMS

Repair or replace ground wire
from solenoid left terminal stud to
starting motor ground terminal stud
(para 2-40).

TM 9-2320-365-20-1

2-156 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
solenoid left terminal stud.
(4) Connect negative (-) probe of multimeter to
starting motor ground terminal stud and note
reading on multimeter.
(5) If continuity is not present repair or replace
ground wire from solenoid left terminal stud
to starting motor ground terminal stud
(para 2-40).

TM 9-2320-365-20-1

Change 1 2-157

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

POSSIBLE PROBLEMS

3.

Is 24 VDC present at
terminal lug TL26?

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.

Faulty starting motor.
Faulty auxiliary starter
solenoid.
Faulty battery to starter cable
assembly.
Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

If 24 VDC is not present, go
to step 4 of this fault. If 24
VDC is present, starting
motor is faulty.

YES
Go to step 4 of this fault.

Voltage Test or
STE/ICE-R Test #89

Replace starting motor (para 7-7).

TM 9-2320-365-20-1

2-158 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove adhesive from solenoid right
terminal stud.
(2) Connect batteries (para 7-48).
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to terminal lug TL26.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Lower cab (TM 9-2320-365-10).
(7) Position master power switch to on
(TM 9-2320-365-10).
(8) Press starter pushbutton
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 24 VDC is not present go to 4 of this
fault.
(10) If 24 VDC is present, replace starting motor
(para 7-7).
(11) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-159

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

POSSIBLE PROBLEMS

Is 24 VDC present at
terminal lug TL9?

TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
4.

Faulty auxiliary starter
solenoid.
Faulty battery to starter cable
assembly.
Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector

Go to step 8 of this fault.
YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Voltage Test or
STE/ICE-R Test #89

TM 9-2320-365-20-1

2-160 Change 1

(TPSS).

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect batteries (para 7-48).
(3) Remove adhesive from auxiliary starter
solenoid.
(4) Connect batteries (para 7-48).
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter to
terminal lug TL9.
(7) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(8) If 24 VDC is not present, go to step 8 of this
fault.

Change 1 2-161

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Is 24 VDC present at
terminal lug TL33?

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

NO

5.

YES
Go to step 9 of this fault.

POSSIBLE PROBLEMS

Faulty auxiliary starter
solenoid.
Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

TM 9-2320-365-20-1

2-162 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
terminal lug TL33.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Lower cab (TM 9-2320-365-10).
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Press starter pushbutton
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, go to step 9 of
this fault.
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Raise cab (TM 9-2320-365-10).

Change 1 2-163

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Is continuity present from
terminal lug TL23 to
ground?

TEST OPTIONS
6.

POSSIBLE PROBLEMS

Faulty auxiliary starter
solenoid.
Faulty start and charging cable
assembly.

REASON FOR QUESTION
If continuity is not present,
wire 93 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Relay K24 OK.
Relay K1 OK.
Engine control cable
assembly OK.
Starter pushbutton switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
Dashboard cable assembly OK.

Continuity Test or
STE/ICE-R Test #91

NO

YES

Repair wire 93 from terminal lug TL23 to
terminal lug TL25 (para 2-40) or replace start
and charging cable assembly (para 7-82).

TM 9-2320-365-20-1

2-164 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove nut, lockwasher, and terminal lug
TL23 from auxiliary starter solenoid.
Discard lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
terminal lug TL23.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If continuity is not present, repair wire 93
from terminal lug TL23 to terminal lug TL25
(para 2-40) or replace start and charging
cable assembly (para 7-82).
(7) Install terminal lug TL23 on auxiliary starter
solenoid with lockwasher and nut.

Change 1 2-165

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

TEST OPTIONS

Faulty auxiliary starter
solenoid.
Faulty start and charging cable
assembly.

POSSIBLE PROBLEMS

KNOWN INFO

REASON FOR QUESTION
If continuity is not present,
wire 14A is faulty. If
continuity is present, auxiliary
starter solenoid is faulty.

7.

Is continuity present from
terminal lug TL24 to
terminal lug TL26?

Replace auxiliary starter
solenoid (para 7-6).

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Relay K24 OK.
Relay K1 OK.
Engine control cable
assembly OK.
Starter pushbutton switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
Dashboard cable assembly OK.

Continuity Test or
STE/ICE-R Test #91

NO

YES

TM 9-2320-365-20-1

2-166 Change 1

Repair wire 14A from terminal lug TL24
to terminal lug TL26 (para 2-40) or replace
start and charging cable assembly
(para 7-82).

CONTINUITY TEST

(1) Remove nut, lockwasher, and terminal lug
TL24 from auxiliary starter solenoid.
Discard lockwasher.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to terminal lug TL24.
(4) Connect negative (-) probe of multimeter to
terminal lug TL26 and note reading on
multimeter.
(5) If continuity is not present, repair wire 14A
from terminal lug TL24 to terminal lug TL26
(para 2-40) or replace start and charging
cable assembly (para 7-82).
(6) If continuity is present, replace auxiliary
starter solenoid (para 7-6).
(7) Install terminal lug TL24 on auxiliary
starter solenoid with lockwasher and nut.
(8) Apply adhesive to auxiliary starter solenoid.
(9) Apply adhesive to solenoid right terminal
stud.
(10) Lower cab (TM 9-2320-365-10).
(11) Connect batteries (para 7-48).

Change 1 2-167

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.

POSSIBLE PROBLEMS

8.

Is 24 VDC present at
terminal lug TL12?

If 24 VDC is not present, wire
1602 is faulty. If 24 VDC is
present, wire 14 faulty.

Faulty battery to starter cable
assembly.
Faulty start and charging
cable assembly.

Voltage Test or
STE/ICE-R Test #89

NO

Replace battery to
starter cable assembly
(para 7-70).

Repair wire 14 from terminal lug
TL55 to terminal lug TL9 (para 2-40)
or replace start and charging cable
assembly (para 7-82).

TM 9-2320-365-20-1

2-168 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to terminal lug TL12.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If 24 VDC is not present, replace battery to
starter cable assembly (para 7-70).
(5) If 24 VDC is present, repair wire 14 from
terminal lug TL55 to terminal lug TL9 (para
2-40) or replace start and charging cable
assembly (para 7-82).
(6) Disconnect batteries (para 7-48).
(7) Apply adhesive to auxiliary starter solenoid.
(8) Apply adhesive to solenoid right terminal
stud.
(9) Connect batteries (para 7-48).
(10) Lower cab (TM 9-2320-365-10).

Change 1 2-169

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.

POSSIBLE PROBLEMS

CAUTION
Read CAUTION
on following page.

Is continuity present
from oil pressure switch
connector socket 1 to pin
2?

9.

Faulty oil pressure switch.
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

TEST OPTIONS

REASON FOR QUESTION
If continuity is not present, oil
pressure switch is faulty.

Continuity Test or
STE/ICE-R Test #91

NO

YES
Replace oil pressure switch (para 7-40).

TM 9-2320-365-20-1

2-170 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Apply adhesive to auxiliary starter solenoid.
(3) Apply adhesive to solenoid right terminal
stud.
(4) Disconnect connector clamp from oil
pressure switch connector.
(5) Disconnect connector P34 from oil pressure
switch connector.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to oil pressure switch connector socket 1.
(8) Connect negative (-) probe of multimeter to
oil pressure switch connector pin 2 and
note reading on multimeter.
(9) If continuity is not present, replace oil
pressure switch (para 7-40).

Change 1 2-171

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Is continuity present from
connector P34 pin 1 to
ground?

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

YES

NO

10.

REASON FOR QUESTION

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS
Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Go to step 20 of this fault.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-172 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P34 pin 1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 20 of
this fault.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Change 1 2-173

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

YES

11.

REASON FOR QUESTION

NO

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Got step 21 of this fault.

Faulty relay K24.
Faulty start and charging
cable assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K24 socket 30 on PDP?

TM 9-2320-365-20-1

2-174 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Connect connector P34 to oil pressure
switch connector.
(2) Connect connector clamp to oil pressure
switch connector.
(3) Lower cab (TM 9-2320-365-10).
(4) Connect batteries (para 7-48).
(5) Remove power distribution panel (PDP)
cover (para 16-2).

NOTE
Tag relays and connection points prior to
removal.

(6) Remove relay K24 from PDP.
(7) Set multimeter to volts DC.
(8) Connect positive (+) probe of multimeter
to relay K24 socket 30 on PDP.
(9) Connect negative (-) probe of multimeter to
ground.
(10) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If 24 VDC is not present, go to step 21 of
this fault.
(12) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-175

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

12.

POSSIBLE PROBLEMS
Faulty relay K24.
Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Go to step 23 of this fault.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K24 socket 86 on PDP?

TM 9-2320-365-20-1

2-176 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K24 socket 86 on PDP.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 VDC is not present, go to step 23 of
this fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-177

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

NO

13.

POSSIBLE PROBLEMS
Faulty relay K24.
Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty engine control cable
assembly.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Go to step 25 of this fault.
YES

Is continuity present from
relay K24 socket 85 on
PDP to ground?

TM 9-2320-365-20-1

2-178 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
relay K24 socket 85 on PDP.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, go to step 25
of this fault.

Change 1 2-179

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Replace relay K24 (para 7-9).
YES

NO

14.

POSSIBLE PROBLEMS

Faulty relay K24.
Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

REASON FOR QUESTION

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.

Is 306-399 ohms resistance
present from relay K24
terminal 86 to terminal 85?
If 306-399 ohms resistance is
not present, relay K24 is
faulty.

Resistance Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-180 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K24 terminal 86.
(3) Connect negative (-) probe of multimeter to
relay K24 terminal 85 and note reading on
multimeter.
(4) If 306-399 ohms resistance is not present,
replace relay K24 (para 7-9).
(5) Connect batteries (para 7-48).

RESISTANCE TEST

Change 1 2-181

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.

REASON FOR QUESTION

Replace relay K24 (para 7-9).
YES

NO

15.

POSSIBLE PROBLEMS

Faulty relay K24.
Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

If 24 VDC is not present, relay
K24 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.

Voltage Test or
STE/ICE-R Test #89

TEST OPTIONS

Is 24 VDC present at PDP
relay K24 socket 87?

TM 9-2320-365-20-1

2-182 Change 1

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Install relay test wire in relay K24 socket
87 on PDP.
(2) Install relay K24 in PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to relay test wire.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, replace relay K24
(para 7-9).
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Remove relay K24 from PDP.
(10) Remove relay test wire from relay K24
socket 87 on PDP.
(11) Install relay K24 in PDP.

Change 1 2-183

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

16.

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

If 24 VDC is not present, wire
1602 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.
Relay K24 OK.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K1 socket 30 on PDP?

NO

Repair wire 1602 from relay K1 socket 30
on PDP to unmarked terminal lug (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-184 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Disconnect batteries (para 7-48).
(2) Remove relay K1 from PDP.
(3) Connect batteries (para 7-48).
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
PDP relay K1 socket 30.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If 24 VDC is not present, repair wire 1602
from relay K1 socket 30 on PDP to
unmarked terminal lug (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-185

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Replace relay K1 (para 7-9).
YES

NO

TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
17.

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty relay K1.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

If 24 VDC is not present, relay
K1 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.
Relay K24 OK.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K1 socket 87 on PDP?

TM 9-2320-365-20-1

2-186 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Disconnect batteries (para 7-48).
(2) Install relay test wire in relay K1 socket
87 on PDP.
(3) Install relay K1 in PDP.
(4) Connect batteries (para 7-48).
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to relay test wire.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Press starter pushbutton
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 24 VDC is not present, replace relay K1
(para 7-9).
(11) Position master power switch to off
(TM 9-2320-365-10).
(12) Disconnect batteries (para 7-48).
(13) Remove relay K1 from PDP.
(14) Remove relay test wire from relay K1
socket 87 on PDP.
(15) Install relay K1 in PDP.

Change 1 2-187

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

NO

18.

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

TEST OPTIONS

REASON FOR QUESTION

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.
Relay K24 OK.
Relay K1 OK.

Continuity Test or
STE/ICE-R Test #91

YES
Go to step 27 of this fault.

Is continuity present from
PDP relay K24 socket 87 to
ground?

TM 9-2320-365-20-1

2-188 Change 1

CONTINUITY TEST

(1) Remove relay K24 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
relay K24 socket 87 on PDP.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Press starter pushbutton
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If continuity is not present, go to step 27
of this fault.

Change 1 2-189

TM 9-2320-365-20-1

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty dashboard cable
assembly.

19.

e2. ENGINE DOES NOT CRANK (CONT)

REASON FOR QUESTION
If continuity is not present,
wire 74 is faulty. If continuity
is present, wire 74 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.
Relay K24 OK.
Relay K1 OK.
Starter pushbutton switch OK.

Continuity Test or
STE/ICE-R Test #91

NO

YES

Is continuity present from
relay K1 socket 87 on PDP
to connector J43 socket 8?

Repair wire 74 from relay K1 socket 87 on
PDP to connector J43 socket 8 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 74 from connector P43 pin 8
to terminal TL33 (para 2-40) or replace start and
charging cable assembly (para 7-82).

TM 9-2320-365-20-1

2-190 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Install relay K24 in PDP.
(2) Remove relay K1 from PDP.
(3) Remove instrument panel for access
(para 7-15).
(4) Disconnect connector J43 from connector
P43.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to connector J43 socket 8.
(7) Connect negative (-) probe of multimeter to
relay K1 socket 87 on PDP and note
reading on multimeter.
(8) If continuity is not present, repair wire 74
from relay K1 socket 87 on PDP and
connector J43 socket 8 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) If continuity is present, repair wire 74 from
connector P43 pin 8 to terminal TL33 (para
2-40) or replace start and charging cable
assembly (para 7-82).
(10) Connect connector J43 to connector P43.
(11) Install instrument panel (para 7-15).
(12) Install relay K1 in PDP.
(13) Install power distribution panel (PDP) cover
(para 16-2).
(14) Connect batteries (para 7-48).

Change 1 2-191

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Is continuity present from
connector P34 pin 1 to
connector P31socket 7?

TEST OPTIONS

CAUTION
Read CAUTION
on following page.
Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
POSSIBLE PROBLEMS

20.

Faulty engine control cable
assembly.
Faulty dashboard cable
assembly.

REASON FOR QUESTION
If continuity is not present,
wire 3006 is faulty. If
continuity is present, wire
3006 is faulty.

Continuity Test or
STE/ICE-R Test #91

NO

YES

Repair wire 3006 from connector J31 pin 7
to terminal lug at terminal board TB2 position
11 (para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3006 from connector P34
pin1 to connector P31 socket 7 (para 2-40)
or replace engine control cable
assembly (para 7-72).

TM 9-2320-365-20-1

2-192 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector P34 pin 1.
(3) Lower cab (TM 9-2320-365-10).
(4) Remove instrument panel for access
(para 7-15).
(5) Disconnect connector J31 from connector
P31.
(6) Connect negative (-) probe of multimeter to
connector P31 socket 7 and note reading on
multimeter.
(7) If continuity is not present, repair wire 3006
from connector P34 pin 1 to connector P31
socket 7 (para 2-40) or replace engine control
cable assembly (para 7-72).
(8) If continuity is present, repair wire 3006 from
connector J31 pin 7 to terminal lug at terminal
board TB2 position 11 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly (para
7-11).

Change 1 2-193

TM 9-2320-365-20-1

(9) Connect connector P31 to connector J31.
(10) Install instrument panel (para 7-15).
(11) Raise cab (TM 9-2320-365-10).
(12) Connect connector P34 to oil pressure
switch connector.
(13) Connect connector clamp on oil pressure

(14) Connect batteries (para 7-48).
(15) Lower cab (TM 9-2320-365-10).

switch connector.

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
POSSIBLE PROBLEMS

Faulty relay K1.
Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

21.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Go to step 29 of this fault.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K1 socket 86 on PDP?

TM 9-2320-365-20-1

2-194 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Install relay K24 in PDP.
(2) Disconnect batteries (para 7-48).
(3) Remove relay K1 from PDP.
(4) Connect batteries (para 7-48).
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to relay K1 socket 86 on PDP.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 24 VDC is not present, go to step 29 of
this fault.
(10) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-195

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Replace relay K1 (para 7-9).
YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
POSSIBLE PROBLEMS
Faulty relay K1.
Faulty dashboard cable
assembly.

22.

REASON FOR QUESTION
Is 306-399 ohms resistance
present from relay K1
terminal 86 to terminal 85?
If 306-399 ohms resistance is
not present, relay K1 is faulty.
If 306-399 ohms resistance is
present, wire 74 is faulty.

TEST OPTIONS

Resistance Test or
STE/ICE-R Test #91

Repair wire 74 from relay K1 socket 30
on PDP to relay K24 socket 30 on PDP
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-196 Change 1

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K1 terminal 86.
(3) Connect negative (-) probe of multimeter to
relay K1 terminal 85 and note reading on
multimeter.
(4) If 306-399 ohms resistance is not present,
replace relay K1 (para 7-9).
(5) If 306-399 ohms resistance is present, repair
wire 74 from relay K1 socket 30 on PDP to
relay K24 socket 30 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Disconnect batteries (para 7-48).
(7) Install relay K1 in PDP.
(8) Install PDP cover (para 16-2).
(9) Connect batteries (para 7-48).

Change 1 2-197

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

POSSIBLE PROBLEMS

REASON FOR QUESTION
If continuity is not present,
wire 1658 is faulty.

Faulty dashboard cable
assembly.

23.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Continuity Test or
STE/ICE-R Test #91

NO

YES

Is continuity present from
relay K24 socket 86 on PDP
to relay K11 socket 30 on
PDP?

Repair wire 1658 from relay K24 socket 86
on PDP to relay K11 socket 30 on PDP (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-198 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove relay K11 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
relay K24 socket 86 on PDP.
(5) Connect negative (-) probe of multimeter to
relay K11 socket 30 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1658
from relay K24 socket 86 on PDP to relay
K30 socket 30 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(7) Install relay K24 in PDP.

Change 1 2-199

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

POSSIBLE PROBLEMS

YES

Faulty dashboard cable
assembly.

REASON FOR QUESTION
If continuity is not present,
wire 1658 is faulty. If
continuity is present, wire
1929 is faulty.

24.

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Is continuity present from
relay K11 socket 30 on PDP
to terminal board TB1
position 64 on PDP?

Continuity Test or
STE/ICE-R Test #91

Repair wire 1658 from relay K11 socket 30
on PDP to terminal board TB1 position 64 (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

Repair wire 1929 from terminal board TB1
position 64 to circuit breaker CB77 socket 5
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-200 Change 1

CONTINUITY TEST

(8) If continuity is present, repair wire 1929
from circuit breaker CB77 socket 5 on PDP to
terminal board TB1 position 64 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(9) Install PDP on dashboard with three screws.
(10) Install three washers and screws in PDP.
(11) Install relay K11 in PDP.
(12) Install PDP cover (para 16-2).

Change 1 2-201

TM 9-2320-365-20-1

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to relay K11 socket 30 on PDP.
(6) Connect negative (-) probe of multimeter to
terminal board TB1 position 64 on PDP and
note reading on multimeter.
(7) If continuity is not present, repair wire
1658 from relay K11 socket 30 on PDP to
terminal board TB1 position 64 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

(13) Connect batteries (para 7-48).

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty dashboard cable
assembly.

25.

REASON FOR QUESTION
If continuity is not present,
wire 34 is faulty.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Is continuity present from
relay K24 socket 85 on PDP
to relay K11 socket 85 on
PDP?

Continuity Test or
STE/ICE-R Test #91

YES

NO

Repair wire 34 from relay K24 socket 85 on
PDP to relay K11 socket 85 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-202 Change 1

CONTINUITY TEST

(1) Remove relay K11 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
relay K24 socket 85 on PDP.
(4) Connect negative (-) probe of multimeter to
relay K11 socket 85 on PDP and note
reading on multimeter.
(5) If continuity is not present, repair wire 34
from relay K24 socket 85 on PDP to relay
K11 socket 85 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Install relay K24 in PDP.

Change 1 2-203

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

YES

NO

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty dashboard cable
assembly.

REASON FOR QUESTION
If continuity is not present,
wire 34 is faulty. If continuity
is present wire 34 is faulty.

26.
Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
relay K11 socket 85 on PDP
to connector J31 pin 21?

Repair wire 34 from connector P31 socket 21 to
connector P34 socket 2 (para 2-40) or replace
engine control cable assembly (para 7-72).

Repair wire 34 from relay K11 socket 85 on
PDP to connector J31 pin 21 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-204 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(10) Install relay K11 in PDP.
(11) Install power distribution panel (PDP) cover
(para 16-2).
(12) Connect batteries (para 7-48).

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector J31 from connector
P31.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J31 pin 21.
(5) Connect negative (-) probe of multimeter to
relay K11 socket 85 on PDP and note
reading on multimeter.
(6) If continuity is not present, repair wire 34
from relay K11 socket 85 on PDP to
connector J31 pin 21 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(7) If continuity is present, repair wire 34 from
connector P31 socket 21 to connector P34
socket 2 (para 2-40) or replace engine
control cable assembly (para 7-72).
(8) Connect connector J31 to connector P31.
(9) Install instrument panel (para 7-15).

Change 1 2-205

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

POSSIBLE PROBLEMS

Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

REASON FOR QUESTION
If continuity is not present,
wire 1405 is faulty.

27.
TEST OPTIONS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Relay K26 OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
Engine control cable assembly
OK.
Relay K24 OK.
Relay K1 OK.

NO

YES

Is continuity present from
relay K24 socket 87 on PDP
to terminal lug TL162?

Continuity Test or
STE/ICE-R Test #91

Repair wire 1405 from relay K24 socket 87
on PDP to terminal lug TL162 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-206 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect terminal lug TL162 from starter
pushbutton switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
terminal lug TL162.
(5) Connect negative (-) probe of multimeter to
relay K24 socket 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, repair wire 1405
from relay K24 socket 87 on PDP to
terminal lug TL162 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(7) Install relay K24 in PDP.
(8) Connect terminal lug TL162 to starter
pushbutton switch.

Change 1 2-207

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

Is continuity present from
terminal lug TL163 to
ground?

TEST OPTIONS

NO

YES

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Neutral start relay OK.
WTEC II vehicle interface
module (VIM) OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Faulty relay K26.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).
Engine control cable assembly
OK.
Relay K24 OK.
Relay K1 OK.

POSSIBLE PROBLEMS

Faulty starter pushbutton
switch.
Faulty dashboard cable
assembly.

Replace starter pushbutton
switch (para 7-20).

28.

REASON FOR QUESTION

If continuity is not present,
wire 3007 is faulty. If
continuity is present, starter
pushbutton switch is faulty.

Continuity Test or
STE/ICE-R Test #91

Repair wire 3007 from terminal lug TL163
to terminal board TB2 positon 11 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-208 Change 1

CONTINUITY TEST

(1) Disconnect terminal lug TL163 from starter
pushbutton switch.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to terminal lug TL163.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire
3007 from terminal TL163 to terminal
board TB2 position 11 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) If continuity is present, replace starter
pushbutton switch (para 7-20).
(7) Connect terminal lug TL163 to starter
pushbutton.
(8) Install instrument panel (para 7-15).
(9) Install power distribution panel (PDP)
cover (para 16-2).
(10) Connect batteries (para 7-48).

Change 1 2-209

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where to continue
troubleshooting.

29.

Is the vehicle equipped with
WTEC II transmission ECU
pushbutton shift selector
(TEPSS)?

NO

Go to step 36 of this fault.
YES

TM 9-2320-365-20-1

2-210 Change 1

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

(1) Check if vehicle is equipped with WTEC II
transmission ECU pushbutton shift selector
(TEPSS).
(2) If TEPSS is not equipped with a filter cover, go
to step 36 of this fault.

Change 1 2-211

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

This question eliminates
possible problems and
determines where to continue
troubleshooting.

30.

NO

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

Is 24 VDC present at neutral
start relay socket 87 on
VIM?

YES
Go to step 41 of this fault.

TM 9-2320-365-20-1

2-212 Change 1

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty dashboard cable
assembly.

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Install relay K1 in PDP.
(2) Remove kick panel (para 16-3).
(3) Remove circuit breaker CB35 from PDP.
(4) Remove eight screws, washers, cover, and
metal seal ring from VIM. Discard metal
seal ring.
(5) Remove neutral start relay from VIM.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to neutral start relay socket 87 on VIM.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Install circuit breaker CB35 in PDP and note
reading on multimeter.
(10) If 24 VDC is not present, go to step 41 of
this fault.
(11) Remove circuit breaker CB35 from PDP.

Change 1 2-213

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

31.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).
Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Is 12 VDC present at neutral
start relay socket 85 on
VIM?

Voltage Test or
STE/ICE-R Test #89

NO

Go to step 43 of this fault.
YES

TM 9-2320-365-20-1

2-214 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
neutral start relay socket 85 on VIM.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Install circuit breaker CB35 in PDP and note
reading on multimeter.
(5) If 12 VDC is not present, go to step 43 of
this fault.
(6) Remove circuit breaker CB35 from PDP.

Change 1 2-215

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
POSSIBLE PROBLEMS

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

32.

REASON FOR QUESTION

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Is continuity present from
neutral start relay socket
86 on VIM to ground?

Continuity Test or
STE/ICE-R Test #91

NO

YES
Go to step 45 of this fault.

TM 9-2320-365-20-1

2-216 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
neutral start relay socket 86 on VIM.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 45 of
this fault.

Change 1 2-217

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.

POSSIBLE PROBLEMS

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

REASON FOR QUESTION

33.

Is 76-99 ohms resistance
present from neutral start
relay terminal 86 to terminal
85?

If 76-99 ohms resistance is
not present, neutral start relay
is faulty.

Resistance Test or
STE/ICE-R Test #91

NO

YES
Replace neutral start relay (para 8-6).

TM 9-2320-365-20-1

2-218 Change 1

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
neutral start relay terminal 85.
(3) Connect negative (-) probe of multimeter to
neutral start relay terminal 86 and note
reading on multimeter.
(4) If 76-99 ohms resistance is not present,
replace neutral start relay (para 8-6).

Change 1 2-219

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
POSSIBLE PROBLEMS

Faulty neutral start relay.
Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

If 24 VDC is not present,
neutral start relay is faulty.

34.
Voltage Test or
STE/ICE-R Test #89

Is 24 VDC present at VIM
neutral start relay socket
30?

NO

YES
Replace neutral start relay (para 8-6).

TM 9-2320-365-20-1

2-220 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Install relay test wire in neutral start relay
socket 30 on VIM.
(2) Install neutral start relay in VIM.
(3) Install circuit breaker CB35 in PDP.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to relay test wire.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, replace neutral
start relay (para 8-6).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Remove circuit breaker CB35 from PDP.
(11) Remove neutral start relay from VIM.
(12) Remove relay test wire from neutral start
relay socket 30 on VIM.

Change 1 2-221

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Replace WTEC II vehicle
interface module (VIM) (para 8-6).

YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
Neutral start relay OK.

POSSIBLE PROBLEMS

Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

35.

REASON FOR QUESTION

If continuity is not present,
WTEC II vehicle interface
module (VIM) is faulty. If
continuity is present, wire
1691 is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
VIM neutral start relay
socket 30 to VIM connector
pin G1?

Repair wire 1691 from connector PX33 socket
G1 to relay K1 socket 86 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10).

TM 9-2320-365-20-1

2-222 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Loosen screw in connector PX33.
(3) Disconnect connector PX33 from VIM
connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to neutral start relay socket 30 on VIM.
(6) Connect negative (-) probe of multimeter to
VIM connector pin G1 and note reading on
multimeter.
(7) If continuity is not present, replace WTEC
II vehicle interface module (VIM) (para 8-6).
(8) If continuity is present, repair wire 1691
from connector PX33 socket G1 to relay
K1 socket 86 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10).
(9) Connect connector PX33 to VIM connector.
(10) Tighten screw in connector PX33.
(11) Install neutral start relay in VIM.
(12) Install cover on VIM with metal seal ring,
eight washers, and screws.
(13) Install circuit breaker CB35 in PDP.
(14) Install kick panel (para 16-3).
(15) Connect batteries (para 7-48).

Change 1 2-223

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

36.

Go to step 46 of this fault.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K26 socket 30 on PDP?

TM 9-2320-365-20-1

2-224 Change 1

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Install relay K1 in PDP.
(2) Remove relay K26 from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
relay K26 socket 30 on PDP.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, go to step 46 of
this fault.
(8) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-225

TM 9-2320-365-20-1

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
37.

Go to step 47 of this fault.

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS

Faulty relay K26.
Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K26 socket 86 on PDP?

TM 9-2320-365-20-1

2-226 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K26 socket 86 on PDP.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 VDC is not present, go to step 47 of
this fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-227

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
POSSIBLE PROBLEMS
Faulty relay K26.
Faulty dashboard cable
assembly.

38.

REASON FOR QUESTION
If continuity is not present,
wire 3102 is faulty.

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Is continuity present from
relay K26 socket 85 on
PDP to ground?

NO

YES

Repair wire 3102 from relay K26 socket 85
on PDP to terminal board TB2 position 17
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-228 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K26 socket 85 on PDP.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3102
from relay K26 socket 85 on PDP to
terminal board TB2 position 17 (para 2-40)
or replace WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-229

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Replace relay K26 (para 7-9).

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
POSSIBLE PROBLEMS
Faulty relay K26.
Faulty dashboard cable
assembly.

39.

REASON FOR QUESTION
Is 306-399 ohms resistance
present from relay K26
terminal 85 to terminal 86?
If 306-399 ohms resistance is
not present, relay K26 is faulty.

Resistance Test or
STE/ICE-R Test #91

NO

YES

TM 9-2320-365-20-1

2-230 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K26 terminal 85.
(3) Connect negative (-) probe of multimeter to
relay K26 terminal 86 and note reading on
multimeter.
(4) If 306-399 ohms resistance is not present,
replace relay K26 (para 7-9).

RESISTANCE TEST

Change 1 2-231

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

Replace relay K26 (para 7-9).
YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC III transmission
pushbutton shift selector
(TPSS) OK.
POSSIBLE PROBLEMS
Faulty relay K26.
Faulty dashboard cable
assembly.

40.

If 24 VDC is not present, relay
K26 is faulty.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at relay
K26 socket 87 on PDP?

Repair wire 1691 from relay K26 socket
87 on PDP to relay K1 socket 86 on PDP
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-232 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits,
or cause severe burns or electrical shock.

WARNING

(1) Install relay test wire in relay K26
socket 87 on PDP.
(2) Install relay K26 in PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to relay test wire.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, replace relay K26
(para 7-9).
(8) If 24 VDC is present, repair wire 1691 from
relay 26 socket 87 on PDP to relay K1
socket 86 on PDP (para 2-40) or replace
WTEC III dashboard cable assembly
(para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Remove relay K26 from PDP.
(11) Remove relay test wire from relay K26
socket 87 on PDP.
(12) Install relay K26 in PDP.
(13) Install power distribution panel (PDP) cover
(para 16-2).

Change 1 2-233

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS
41.

REASON FOR QUESTION
If continuity is not present,
WTEC II vehicle interface
module is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
VIM connector pin F1 to
neutral start relay socket 87
on VIM?

NO

YES
Replace WTEC II vehicle interface
module (VIM) (para 8-6).

TM 9-2320-365-20-1

2-234 Change 1

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS

Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Loosen screw in connector PX33.
(3) Disconnect connector PX33 from VIM
connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to neutral start relay socket 87 on VIM.
(6) Connect negative (-) probe of multimeter to
VIM connector PX33 pin F1 and note
reading on multimeter.
(7) If continuity is not present, replace WTEC II
vehicle interface module (VIM) (para 8-6).
(8) Install neutral start relay in VIM.
(9) Install cover on VIM with metal seal ring,
eight washers, and screws.
(10) Install circuit breaker CB35 in PDP.

Change 1 2-235

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

YES

NO

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II vehicle interface
module (VIM) OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.

42.

REASON FOR QUESTION

If continuity is not present,
WTEC II vehicle interface
module is faulty. If continuity
is present, wire 1692 is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector PX33 socket F1
to terminal board TB1
position 34?

Repair wire 1692 from connector PX33 socket F1
to terminal board TB1 position 34 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10).

Repair wire 1692 from terminal board TB1 position
36 to circuit breaker CB21 socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10).

TM 9-2320-365-20-1

2-236 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to terminal board TB1 position 34.
(6) Connect negative (-) probe of multimeter
connector PX33 socket F1 and note
reading on multimeter.
(7) If continuity is not present, repair wire
1692 from connector PX33 socket F1 to
terminal board TB1 position 34 (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10).
(8) If continuity is present, repair wire 1692
from terminal board TB1 position 36 and
circuit breaker CB21 socket 2 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10).
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Connect connector PX33 to VIM connector.
(12) Tighten screw in connector PX33.
(13) Install kick panel (para 16-3).
(14) Connect batteries (para 7-48).

Change 1 2-237

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
POSSIBLE PROBLEMS

Faulty WTEC II vehicle
interface module (VIM).
Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).

43.

REASON FOR QUESTION
If continuity is not present,
WTEC II vehicle interface
module (VIM) is faulty.

NO

YES
Replace WTEC II vehicle interface
module (VIM) (para 8-6).

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
neutral start relay socket 85
on VIM to VIM connector
pin P1?

TM 9-2320-365-20-1

2-238 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Loosen screw on connector J116.
(3) Disconnect connector J116 from VIM
connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to neutral start relay socket 85 on VIM.
(6) Connect negative (-) probe of multimeter to
VIM connector pin P1 and note reading on
multimeter.
(7) If continuity is not present, replace WTEC
II vehicle interface module (VIM) (para 8-6).
(8) Install neutral start relay in VIM.
(9) Install cover on VIM with metal seal ring,
eight washers, and screws.
(10) Install circuit breaker CB35 in PDP.

Change 1 2-239

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector J116 socket D1
to connector J114 socket
23?

Replace WTEC II transmission ECU
pushbutton shift selector (TEPSS)
(para 8-2).

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II vehicle interface
module (VIM) OK.
POSSIBLE PROBLEMS

Faulty WTEC II cab
transmission wiring harness.
Faulty WTEC II transmission
ECU pushbutton shift selector
(TEPSS).

TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
WTEC II cab transmission
wiring harness is faulty. If
continuity is present, WTEC II
transmission ECU pushbutton
shift selector (TEPSS) is faulty.

44.
Continuity Test or
STE/ICE-R Test #91

NO

YES
Replace WTEC II cab transmission
wiring harness (para 7-86).

TM 9-2320-365-20-1

2-240 Change 1

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector J114 from WTEC
II transmission ECU pushbutton shift
selector (TEPSS).
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J114 socket 23.
(5) Connect negative (-) probe of multimeter to
connector J116 socket D1 and note
reading on multimeter.
(6) If continuity is not present, replace WTEC II
cab transmission wiring harness
(para 7-86).
(7) If continuity is present, replace WTEC II
transmission ECU pushbutton shift selector
(TEPSS) (para 8-2).
(8) Connect connector J114 to WTEC II
transmission ECU pushbutton shift selector
(TEPSS).
(9) Install instrument panel (para 7-15).
(10) Connect connector J116 to VIM connector.
(11) Tighten screw on connector J116.
(12) Install kick panel (para 16-3).
(13) Connect batteries (para 7-48).

Change 1 2-241

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
WTEC II cab transmission
wiring harness OK.
WTEC II transmission ECU
pushbutton shift selector
(TEPSS) OK.
POSSIBLE PROBLEMS

Faulty WTEC II vehicle
interface module (VIM).
Faulty dashboard cable
assembly.

REASON FOR QUESTION

If continuity is not present,
WTEC II VIM is faulty. If
continuity is present, wire
3101 is faulty.

45.

CAUTION
Read CAUTION
on following page.

NO

YES
Replace WTEC II vehicle interface module
(VIM) (para 8-6).

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
neutral start relay socket 86
on VIM to VIM connector
pin K1?

Repair wire 3101 from connector PX33 socket K1
to terminal board TB2 position 16 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly (para 7-10).

TM 9-2320-365-20-1

2-242 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to neutral start relay socket 86 on VIM.
(3) Connect negative (-) probe of multimeter to
VIM connector pin K1 and note reading on
multimeter.
(4) If continuity is not present, replace WTEC II
vehicle interface module (VIM) (para 8-6).
(5) If continuity is present, repair wire 3101
from connector PX33 socket K1 to terminal
board TB2 position 16 on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10).
(6) Install neutral start relay in VIM.
(7) Install cover on VIM with metal seal ring,
eight washers, and screws.
(8) Connect connector PX33 to VIM connector.
(9) Tighten screw in connector PX33.
(10) Install circuit breaker CB35 in PDP.
(11) Install kick panel (para 16-3).

Change 1 2-243

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO

Is 24 VDC is not present, wire
1692 is faulty.

46.

Is 24 VDC present at
terminal board TB1 position
36?

Voltage Test or
STE/ICE-R Test #89

Repair wire 1692 from terminal board TB1
position 36 and circuit breaker CB21 socket 1
(para 2-40) or replace WTEC III dashboard cable
assembly (para 7-11).

Repair wire 1692 from terminal board TB1
position 34 and relay K26 socket 30 on PDP
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-244 Change 1

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).

(1) Install relay K26 in PDP.
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter to
terminal board TB1 position 36.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 24 VDC is not present, repair wire 1692
from terminal board TB1 position 36 to circuit
breaker CB21 socket 1 (para 2-40) or replace
WTEC III dashboard cable assembly (para 7-11).
(10) If 24 VDC is present, repair wire 1692 from
terminal board TB1 position 34 to relay K26
socket 30 on PDP (para 2-40) or replace
WTEC III dashboard cable assembly (para
7-11).
(11) Position master power switch to off
(TM 9-2320-365-10).
(12) Install PDP on dashboard with three screws.

Change 1 2-245

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
If continuity is not present,
wire 123 is faulty.

NO

CAUTION
Read CAUTION
on following page.
47.

Is continuity present from
relay K26 socket 86 on PDP
to connector P115 socket
8?

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-246 Change 1

Repair wire 123 from relay K26
socket 86 on PDP to connector
P115 socket 8 (para 2-40) or replace
WTEC III dashboard cable assembly
(para 7-11).

YES

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove kick panel (para 16-3).
(3) Disconnect connector clamp from
connector P115.
(4) Disconnect connector P115 from WTEC III
transmission ECU connector.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K26 socket 86.
(7) Connect negative (-) probe of multimeter to
connector P115 socket 8 and note
reading on multimeter.
(8) If continuity is not present, repair wire 123
from relay K26 socket 86 to connector
P115 socket 8 (para 2-40) or replace
WTEC III dashboard cable assembly
(para 7-11).
(9) Connect connector P115 to WTEC III
transmission ECU connector.
(10) Connect connector clamp to connector
P115.
(11) Install relay K26 in PDP.

Change 1 2-247

TM 9-2320-365-20-1

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS
48.

NO

YES

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

TM 9-2320-365-20-1

2-248 Change 1

If continuity is not present,
wire (refer to Table 2-8.2.
Connector PX33 Ground
Continuity Test) is faulty.

Is continuity present from
connector PX33 socket
(refer to Table 2-8.2.
Connector PX33 Ground
Continuity Test) to terminal
board TB2 position (refer to
Table 2-8.2. Connector
PX33 Ground Continuity
Test)?

Repair wire (refer to Table 2-8.2. Connector
PX33 Ground Continuity Test (para 2-40) or
replace WTEC III dashboard cable assembly
(para 7-11).

POSSIBLE PROBLEMS

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CONTINUITY TEST

Terminal Board
TB2 Position
Wire
Connector
PX33 Socket

Change 1 2-249

TM 9-2320-365-20-1

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector PX33 from WTEC III
TPSS connector.
(3) Remove three screws and washers from
PDP.
(4) Remove three screws from PDP.
(5) Lift PDP outward to gain access.
(6) Set multimeter to ohms.
(7) For each line of Table 2-8.2. Connector
PX33 Ground Continuity Test perform the
following:
(a) Connect positive (+) probe of
multimeter to connector PX33 socket.
(b) Connect negative (-) probe of
multimeter to terminal board TB2
position and not reading on
multimeter.
(8) If continuity is not present on either wire in
Table 2-8.2. Connector PX33 Ground
Continuity Test repair wire (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.

Table 2-8.2. Connector PX33 Ground Continuity Test

T
V

15
13
188
186

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

REASON FOR QUESTION

49.
Continuity Test or
STE/ICE-R Test #91

NO

YES

TM 9-2320-365-20-1

2-250 Change 1

If continuity is not present,
wire (refer to Table 2-8.3.
Connector PX33 Continuity
Test) is faulty.

Is continuity present from
connector PX33 socket
(refer to Table 2-8.3.
Connector PX33 Continuity
Test) to connector P116
socket (refer to Table 2-8.3.
Connector PX33 Continuity
Test)?

Repair wire (refer to Table 2-8.3. Connector
PX33 Continuity Test (para 2-40) or replace
WTEC III dashboard cable assembly (para 7-11).

Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CONTINUITY TEST

Change 1 2-251

TM 9-2320-365-20-1

(1) Disconnect connector clamp from
connector P116.
(2) Disconnect connector P116 from WTEC III
transmission ECU connector.
(3) Set multimeter to ohms.
(4) For each line of Table 2-8.3. Connector
PX33 Ground Continuity Test perform the
following:
(a) Connect positive (+) probe of
multimeter to connector PX33 socket.
(b) Connect negative (-) probe of
multimeter to connector P116
position and not reading on
multimeter.
(5) If continuity is not present on either wire in
Table 2-8.3. Connector PX33 Continuity
Test repair wire (para 2-40) or replace
WTEC III dashboard cable assembly
(para 7-11).
(6) Install PDP on dashboard with three
screws.
(7) Connect connector P116 to WTEC III
transmission ECU connector.
(8) Connect connector clamp to connector
P116.

Connector PX33
Socket

Connector P116
Socket
Wire

Table 2-8.3. Connector PX33 Continuity Test

P
L
A
B
C
D
E
S
M
N
R

32
15
5
6
7
8
9
14
10
3
16

143
176
170
171
172
173
174
180
175
124
136

e2. ENGINE DOES NOT CRANK (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

50.
Transmission pushbutton
shift selector in neutral (N).
Batteries OK.
Service drive lights OK.
Circuit breakers OK.
Starting motor OK.
Battery to starter cable
assembly OK.
Oil pressure switch OK.
Dashboard cable assembly OK.
POSSIBLE PROBLEMS

Faulty WTEC III transmission
ECU.
Faulty WTEC III transmission
pushbutton shift selector
(TPSS).

Does engine crank with a
known good WTEC III
transmission pushbutton
shift selector (TPSS)?

NO

If engine cranks, WTEC III
transmission pushbutton shift
selector is faulty. If engine
does not crank, WTEC III
transmission ECU is faulty.

WTEC III Transmission
Pushbutton Shift Selector Test

Replace WTEC III transmission ECU
(para 8-7).

Replace WTEC III transmission pushbutton
shift selector (TPSS) (para 8-3).

YES

TM 9-2320-365-20-1

2-252 Change 1

WTEC III TRANSMISSION PUSHBUTTON SHIFT
SELECTOR TEST (TPSS)

(1) Replace WTEC III TPSS (para 8-3).
(2) Connect batteries (para 7-48).
(3) Attempt to start engine
(TM 9-2320-365-10).
(4) If engine does not crank, replace WTEC III
transmission ECU (para 8-7).
(5) If engine does crank, replace WTEC III
TPSS (para 8-3).
(6) Install instrument panel (para 7-15).
(7) Install kick panel (para 16-3).

Change 1 2-253

TM 9-2320-365-20-1

POSSIBLE PROBLEMS

1.

Are batteries serviceable?

KNOWN INFO

Circuit breaker CB70 OK.

TEST OPTIONS

NO

YES

Faulty battery(ies).
Faulty cab to chassis ground
strap.
Faulty PDP to cab ground cable.
Faulty dashboard cable assembly.
Faulty shunt.
Faulty starter to shunt 24 VDC
cable.
Faulty battery to shunt cable
assembly.
Faulty starter to chassis ground
cable.
Faulty 100 AMP reverse polarity
relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse polarity
relay to PDP 12 VDC cable.
Faulty 200 AMP reverse polarity
relay.
Faulty 200 AMP terminal block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12 VDC
load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12 VDC
battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

Battery Specific Gravity Test

REASON FOR QUESTION

If battery(ies) is unserviceable,
12 vdc circuits will not operate.

START

WARNING
Read WARNING
on following page.

Charge battery(ies)
(TM 9-6140-200-14) or
replace battery(ies) (para 7-46).

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE

TM 9-2320-365-20-1

2-254 Change 1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB70 prior to beginning this
task.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Materials/Parts
Dispenser, Pressure Sensitive Adhesive Tape
(Item 21, Appendix D)
Lockwasher (Item 66.1, Appendix G)
Lockwasher (Item 73, Appendix G)
Lockwasher (Item 76, Appendix G)
Lockwasher (Item 78, Appendix G)
Lockwasher (4) (Item 92, Appendix G)
Lockwasher (2) (Item 65, Appendix G)
Self-locking Nut (Item 148, Appendix G)
Ties, Cable, Plastic (Item 76 Appendix D)
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Apron, Rubber (Item 3, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Gloves, Rubber (Item 13, Appendix C)
Socket Set, Socket Wrench (Item 35, Appendix C)
Tester, Antifreeze and Battery (Item 41, Appendix C)
Wire, Relay Test (Item 9, Appendix E)
Wrench, Torque, 0-175 lb-ft. (Item 57, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

References
TM 9-6140-200-14
TM 9-4910-571-12&P

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.
Batteries can explode from a spark. Battery
acid is harmful to skin and eyes. Always wear
eye protection and rubber gloves when working
with batteries.

Battery Specific Gravity Test

(1) Remove four batteries from battery box
(para 7-46).
(2) Test batteries for serviceability (TM 9-6140-
200-14).
(3) Replace battery(ies) if unserviceable (TM 9-
6140-200-14).
(4) Install four batteries in battery box (para 7-
46).

Change 1 2-255

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO

POSSIBLE PROBLEMS

2.
TEST OPTIONS

REASON FOR QUESTION

Faulty cab to chassis ground
strap.
Faulty PDP to cab ground
cable.
Faulty dashboard cable
assembly.
Faulty shunt.
Faulty starter to shunt 24 VDC
cable.
Faulty battery to shunt cable
assembly.
Faulty starter to chassis
ground cable.
Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse
polarity relay to PDP 12 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

Circuit breakers CB70 OK.
Battery(ies) OK.

Continuity Test or
STE/ICE-R Test #91

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is continuity present from
terminal X3 on power
distribution panel (PDP) to
terminal lug TL64?

NO

YES
Go to step 6 of this fault.

TM 9-2320-365-20-1

2-256 Change 1

CONTINUITY TEST

NOTE

(1) Disconnect batteries (para 7-48).

Remove plastic cable ties as required.

(2) Remove two screws and washers from front
grille.
(3) Remove screw, washer, and front grille from
cab.
(4) Remove power distribution panel (PDP) cover
(para 16-2).
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
terminal X3 on power distribution panel
(PDP).
(7) Connect negative (-) probe of multimeter to
terminal lug TL64 and note reading on
multimeter.
(8) If continuity is not present, go to step 6 of
this fault.

Change 1 2-256.1

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO

YES

TEST OPTIONS

Is continuity present from
terminal lug TL48 to
terminal lug TL62?

3.

Go to step 8 of this fault.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty shunt.
Faulty starter to shunt 24 VDC
cable.
Faulty battery to shunt cable
assembly.
Faulty starter to chassis
ground cable.
Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse
polarity relay to PDP 12 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

REASON FOR QUESTION

NO

Continuity Test or
STE/ICE-R Test #91

This question eliminates
possible problems and
determines where
troubleshooting continues.

TM 9-2320-365-20-1

2-256.2 Change 1

Install plastic cable ties as required.

(1) Position front grille on cab with washer and
screw.
(2) Position two washers and screws in front
grille.
(3) Tighten screw to 48-60 lb-in. (5-7 N.m).
(4) Tighten two screws to 24 lb-in. (3 N.m).
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
terminal lug TL48.
(7) Connect negative (-) probe of multimeter to
terminal lug TL62 and note reading on
multimeter.
(8) If continuity is not present, go to step 8 of
this fault.

NOTE

CONTINUITY TEST

Change 1 2-256.3

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO

YES

TEST OPTIONS

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse
polarity relay to PDP 12 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

4.

Is 12 VDC present at
terminal X2 on PDP?
REASON FOR QUESTION

Go to step 11 of this fault.

NO

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

TM 9-2320-365-20-1

2-256.4 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

(1) Connect batteries (para 7-48).
(2) Set multimeter to volts DC.

When testing to terminal X2 on PDP, ensure
that multimeter probes come in contact with
the outside metal ring. Failure to comply
may result in false troubleshooting test
results.

(3) Connect positive (+) probe of multimeter to
terminal X2 on PDP
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 12 VDC is not present, go to step 11 of
this fault.

Change 1 2-256.5

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO

YES

TEST OPTIONS

WARNING
Read WARNING
on following page.

REASON FOR QUESTION

5.
Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS
Is 12 VDC present at circuit
breaker socket 1, left of
circuit breaker CB70 on
PDP?

NO

Voltage Test or
STE/ICE-R Test #89

Repair wire 1601 from bus bar X7 on PDP
to terminal X2 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11)

TM 9-2320-365-20-1

2-256.6 Change 1

If 12 VDC is not present, wire
1601 is faulty. If 12 VDC is
present, bus bar X7 is faulty.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
100 AMP reverse polarity
relay OK.
Battery to 100 AMP reverse
polarity relay 12 VDC cable
OK.
100 AMP reverse polarity relay
to PDP 12 VDC cable OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
200 AMP terminal block to
PDP 12 VDC cable OK.
200 AMP terminal block to
reverse polarity relay 12 VDC
load cable OK.
200 AMP terminal block to
reverse polarity relay 12 VDC
battery cable OK.
Battery to 200 AMP terminal
block 12 VDC cable assembly
OK.

Replace bus bar X7 on PDP or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly(para 7-11)

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Position master power switch to on (TM 9-
2320-365-10).
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
circuit breaker socket 1, left of circuit
breaker CB70 on PDP.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 12 VDC is not present, repair wire 1601
from bus bar X7 on PDP to terminal X2 on
PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(6) If 12 VDC is present, replace bus bar X7 on
PDP or WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(7) Position master power switch to off (TM 9-
2320-365-10).
(8) Install PDP cover (para 16-2).

Change 1 2-256.7

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

TEST OPTIONS

NO

YES

KNOWN INFO
6.

Is continuity present from
terminal lug TL65 to
terminal lug TL64?

Circuit breakers CB70 OK.
Battery(ies) OK.

POSSIBLE PROBLEMS

Faulty cab to chassis ground
strap.
Faulty PDP to cab ground
cable.
Faulty dashboard cable
assembly.

REASON FOR QUESTION
If continuity is not present,
cab to chassis ground strap is
faulty.

Continuity Test or
STE/ICE-R Test #91

Replace cab to chassis ground
strap (para 7-71).

TM 9-2320-365-20-1

2-256.8 Change 1

CONTINUITY TEST

NOTE

(1) Remove self-locking nut, washer, terminal
lug TL65, and lockwasher from stud.
Discard self-locking nut and lockwasher.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to terminal lug TL65.
(4) Connect negative (-) probe of multimeter
to terminal lug TL64 and note reading on
multimeter.
(5) If continuity is not present, replace cab to
chassis ground strap (para 7-71).
(6) Install lockwasher and terminal lug TL65
on stud with washer and self-locking nut.

Install plastic cable ties as required.

(7) Position front grille on cab with washer
and screw.
(8) Position two washers and screws in front
grille.
(9) Tighten screw to 48-60 lb-in. (5-7 N.m).
(10) Tighten two screws to 24 lb-in. (3 N.m).

Change 1 2-256.9

TM 9-2320-365-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

TEST OPTIONS
KNOWN INFO
7.

NO

Is continuity present from
terminal lug TL56 to
terminal lug TL57?

Circuit breakers CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.

POSSIBLE PROBLEMS

Faulty PDP to cab ground
cable.
Faulty dashboard cable
assembly.

YES

REASON FOR QUESTION

If continuity is not present,
PDP to cab ground cable is
faulty. If continuity is present,
wire 1603 is faulty.

Continuity Test or
STE/ICE-R Test #91

Repair wire 1603 from terminal X3 on PDP
to terminal board TB2 position 1 on PDP
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace PDP to cab
ground cable (para 7-76).

TM 9-2320-365-20-1

2-256.10 Change 1

CONTINUITY TEST

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift outward to gain access.
(4) Remove nut, lockwasher, terminal lug
TL190, and terminal lug TL57 from
grounding stud. Discard lockwasher.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to terminal lug TL57.
(7) Connect negative (-) probe of multimeter to
terminal lug TL56 and note reading on
multimeter.
(8) If continuity is not present, replace PDP to
cab ground cable (para 7-76).
(9) If continuity is present, repair wire 1603
from terminal X3 on PDP to terminal board
TB2 position 1 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(10) Install terminal lug TL190 and terminal lug
TL57 on grounding stud with lockwasher
and nut.

screws.
(12) Install three washers and screws in PDP.
(13) Install PDP cover (para 16-2).
(14) Connect batteries (para 7-48).

Change 1 2-256.11

TM 9-2320-365-20-1

(11) Install PDP on dashboard with three

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Is continuity present from
one end of shunt to other
end of shunt?

TEST OPTIONS

NO

YES

KNOWN INFO

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.

POSSIBLE PROBLEMS

Faulty shunt.
Faulty starter to shunt 24 VDC
cable.
Faulty battery to shunt cable
assembly.
Faulty starter to chassis
ground cable.

8.

REASON FOR QUESTION
If continuity is not present,
shunt is faulty.

Continuity Test or
STE/ICE-R Test #91

Replace shunt (para 7-26).

TM 9-2320-365-20-1

2-256.12 Change 1

CONTINUITY TEST

NOTE

(1) Raise cab (TM 9-2320-365-10).
(2) Lower spare tire (TM 9-2320-365-10).
(3) Install PDP cover (para 16-2).
(4) Loosen clamp on air hose.
(5) Remove air hose from intake air cleaner
boot.

Tag wires and connection points prior to
disconnecting.

(6) Remove screw, lockwasher, and terminal
lug TL52 from shunt. Discard lockwasher.
(7) Remove screw, lockwasher, and terminal
lug TL45 from shunt. Discard lockwasher.
(8) Set multimeter to ohms.
(9) Connect positive (+) probe of multimeter
to one end of shunt.
(10) Connect negative (-) probe of multimeter to
other end of shunt and note reading
of multimeter.
(11) If continuity is not present, replace shunt
(para 7-26).

TM 9-2320-365-20-1

Change 1 2-256.13

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

Is continuity present from
starting motor ground
terminal stud to terminal lug
TL45?

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.

POSSIBLE PROBLEMS

Faulty starter to shunt 24 VDC
cable.
Faulty battery to shunt cable
assembly.
Faulty starter to chassis
ground cable.

9.

REASON FOR QUESTION
If continuity is not present,
starter to shunt 24 VDC cable
is faulty.

Continuity Test or
STE/ICE-R Test #91

Replace starter to shunt 24 VDC
cable (para 7-84).

TM 9-2320-365-20-1

2-256.14 Change 1

CONTINUITY TEST

Change 1 2-256.15

TM 9-2320-365-20-1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
starting motor ground terminal stud.
(3) Connect negative (-) probe of multimeter to
terminal lug TL45 and note reading on
multimeter.
(4) If continuity is not present, replace starter to
shunt 24 VDC cable (para 7-84).
(5) Lower cab (TM 9-2320-365-10).
(6) Install terminal lug TL45 on shunt with
lockwasher and screw.

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

TEST OPTIONS
KNOWN INFO

Is continuity present from
terminal lug TL52 to
terminal lug TL48?

10.

REASON FOR QUESTION

If continuity is not present,
battery to shunt cable
assembly is faulty. If
continuity is present starter
to chassis ground cable is
faulty.

NO

YES

Continuity Test or
STE/ICE-R Test #91

Replace starter to chassis
ground cable (para 7-83).

Replace battery to shunt
cable assembly (para 7-69).

TM 9-2320-365-20-1

2-256.16 Change 1

Faulty battery to shunt cable
assembly.
Faulty starter to chassis
ground cable.

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC
cable OK.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug TL52.
(3) Connect negative (-) probe of multimeter to
terminal lug TL48 and note reading on
multimeter.
(4) If continuity is not present, replace
battery to shunt cable assembly (para
7-69) .
(5) If continuity is present, replace starter to
chassis ground cable (para 7-83).
(6) Install terminal lug TL52 on shunt with
lockwasher and screw.
(7) Position air hose on intake air cleaner
boot with clamp.
(8) Tighten clamp to 36-48 lb-in. (4-5 N.m).
(9) Raise spare tire (TM 9-2320-365-10).
(10) Connect batteries (para 7-48).

Change 1 2-256.17

TM 9-2320-365-20-1

KNOWN INFO

Is vehicle equipped with a
100 AMP reverse polarity
relay?

TEST OPTIONS
11.
Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.

POSSIBLE PROBLEMS

Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse
polarity relay to PDP 12 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

REASON FOR QUESTION

Visual Inspection

YES
Go to step 14 of this fault.

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

TM 9-2320-365-20-1

2-256.18 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

(1) Lower spare tire (TM 9-2320-365-10).
(2) Check if vehicle is equipped with 100 AMP reverse
polarity relay.
(3) If vehicle is not equipped with 100 AMP reverse
polarity relay, go to step 14 of this fault.

Change 1 2-256.19

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS
12.

REASON FOR QUESTION

NO

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
terminal lug TL80 to
terminal X2 on PDP?

CAUTION
Read CAUTION
on following page.

YES

If continuity is not present,
100 AMP reverse polarity relay
to PDP 12VDC cable is faulty.

Replace 100 AMP reverse polarity
relay to PDP 12 VDC cable
(para 7-80).

TM 9-2320-365-20-1

2-256.20 Change 1

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.

POSSIBLE PROBLEMS

Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.
Faulty 100 AMP reverse
polarity relay to PDP 12 VDC
cable.

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

CAUTION

NOTE

(1) Disconnect batteries (para 7-48).
(2) Loosen clamp on air hose.
(3) Remove air hose from intake air cleaner
boot.
(4) Lift dust boot on 12V LOAD terminal stud
on 100 AMP reverse polarity relay.

Tag all terminal lugs and connection points
prior to disconnecting.

(5) Remove nut, lockwasher, and terminal lug
TL80 from 12V LOAD terminal stud on
100 AMP reverse polarity relay.
(6) Set multimeter to ohms.

When testing to terminal X2 on PDP, ensure
that multimeter probes come in contact with
the outside metal ring. Failure to comply
may result in false troubleshooting test
results.

(7) Connect positive probe (+) of multimeter
to terminal X2 on PDP.

Change 1 2-256.21

TM 9-2320-365-20-1

(8) Connect negative probe (-) of multimeter to
terminal lug TL80 and note reading on
multimeter.
(9) If continuity is not present, replace 100 AMP
reverse polarity relay to PDP 12 VDC cable
(para 7-80).
(10) Position terminal lug TL80 on 12V LOAD
terminal stud on 100 AMP reverse polarity
relay with lockwasher and nut.
(11) Tighten nut to 120-144 lb-in. (14-16 N.m).
(12) Position dust boot on 12V LOAD terminal stud
on 100 AMP reverse polarity relay.
(13) Install PDP cover (para 16-2).

KNOWN INFO
TEST OPTIONS
13.

Is continuity present from
terminal lug TL99 to
terminal lug TL47?

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91
Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
100 AMP reverse polarity relay
to PDP 12 VDC cable OK.

POSSIBLE PROBLEMS

Faulty 100 AMP reverse
polarity relay.
Faulty battery to 100 AMP
reverse polarity relay 12 VDC
cable.

If continuity is not present,
battery to 100 AMP reverse
polarity relay 12 VDC cable
is faulty. If continuity is
present, 100 AMP reverse
polarity relay is faulty.

Replace 100 AMP reverse polarity relay
(para 7-27).

Replace battery to 100 AMP reverse
polarity relay 12 VDC cable (para 7-67).

TM 9-2320-365-20-1

2-256.22 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Lift terminal cover on 12V BAT terminal
stud on 100 AMP reverse polarity relay.
(2) Remove nut, lockwasher, terminal lug
TL61, and terminal lug TL47 from 12V BAT
terminal stud on 100 AMP reverse polarity
relay. Discard lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive probe (+) of multimeter
to terminal lug TL99.
(5) Connect negative probe (-) of multimeter to
terminal lug TL47 and note reading on
multimeter.
(6) If continuity is not present, replace battery
to 100 AMP reverse polarity relay 12 VDC
cable (para 7-67).
(7) If continuity is present, replace 100 AMP
reverse polarity relay (para 7-27).
(8) Lift terminal cover on 12V BAT terminal
stud on 100 AMP reverse polarity relay.
(9) Position terminal lugs TL47 and TL61 on
12V BAT terminal stud on 100 AMP
reverse polarity relay with lockwasher and
nut.

Change 1 2-256.23

TM 9-2320-365-20-1

(10) Tighten nut to 120-144 lb-in.
(14-16 N.m).
(11) Position air hose on intake air cleaner boot
with clamp.
(12) Tighten clamp to 36-48 lb-in. (4-5 N.m).
(13) Connect batteries (para 7-48).
(14) Raise spare tire (TM 9-2320-365-10).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
200 AMP terminal block is
faulty.

Is continuity present from
200 AMP terminal block
12V BAT left terminal stud
to right terminal stud?

Continuity Test or
STE/ICE-R Test #91

NO

YES

14.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

Replace 200 AMP terminal
block (para 20-69).

TM 9-2320-365-20-1

2-256.24 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove nut, lockwasher, washer, and
terminal lug TL47 from left 12V BAT
terminal stud on 200 AMP terminal
block. Discard lockwasher.
(3) Remove nut, lockwasher, washer, and
terminal lugs TL171 and TL61 from right
12V BAT terminal stud on 200 AMP
terminal block. Discard lockwasher.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to left 12V BAT terminal stud on 200 AMP
terminal block.
(6) Connect negative (-) probe of multimeter to
right 12V BAT terminal stud on 200 AMP
terminal block and note reading on
multimeter.
(7) If continuity is not present, replace 200
AMP terminal block (para 20-69).
(8) Position terminal lug TL47 on left 12V BAT
terminal stud on 200 AMP terminal block
with washer, lockwasher, and nut.
(9) Tighten nut to 15-19 lb-ft (21-25 N.m).

Change 1 2-256.25

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
200 AMP terminal block is
faulty.

Is continuity present from
200 AMP terminal block
12V LOAD left terminal stud
to right terminal stud?

Continuity Test or
STE/ICE-R Test #91

NO

YES

15.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

POSSIBLE PROBLEMS

Replace 200 AMP terminal
block (para 20-69).

TM 9-2320-365-20-1

2-256.26 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Lift dust boot on left 12V LOAD terminal
stud on 200 AMP terminal block.
(2) Remove nut, lockwasher, washer, and
terminal lug TL80 from left 12V LOAD
terminal stud on 200 AMP terminal block.
Discard lockwasher.
(3) Remove nut, lockwasher, washer, and
terminal lug TL172 from right 12V LOAD
terminal stud on 200 AMP terminal block.
Discard lockwasher.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
left 12V LOAD terminal stud on 200 AMP
terminal block.
(6) Connect negative (-) probe of multimeter to
right 12V LOAD terminal stud on 200 AMP
terminal block and note reading on
multimeter.
(7) If continuity is not present, replace 200 AMP
terminal block (para 20-69).

Change 1 2-256.27

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL80 to
terminal X2 on PDP?
If continuity is not present,
200 AMP terminal block to
PDP is 12 VDC cable is faulty.

YES

NO

Continuity Test or
STE/ICE-R Test #91

16.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
200 AMP terminal
block OK.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to PDP 12 VDC cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

CAUTION
Read CAUTION
on following page.

Replace 200 AMP terminal
block to PDP 12 VDC cable
(para 20-65).

TM 9-2320-365-20-1

2-256.28 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

CAUTION

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug TL80.

When testing to terminal X2 on PDP,
ensure that multimeter probes come in
contact with the outside metal ring. Failure
to comply may result in false
troubleshooting test results.

(3) Connect negative (-) probe of multimeter to
terminal block X2 on PDP and note reading
on multimeter.
(4) If continuity is not present, replace 200
AMP terminal block to PDP 12 VDC cable
(para 20-65).
(5) Position terminal lug TL80 on left 12V
LOAD terminal stud on 200 AMP terminal
block with washer, lockwasher, and nut.
(6) Tighten nut to 15-19 lb-ft (21-25 N.m).
(7) Position dust boot on left 12V LOAD
terminal stud on 200 AMP terminal block.

Change 1 2-256.29

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL172 to
terminal lug TL174?
If continuity is not present,
200 AMP terminal block to
reverse polarity relay 12 VDC
load cable is faulty.

Continuity Test or
STE/ICE-R Test #91

YES

NO

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
200 AMP terminal
block OK.
200 AMP terminal block to
PDP 12 VDC cable OK.

POSSIBLE PROBLEMS

17.

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC load cable.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

Replace 200 AMP terminal
block to reverse polarity relay
12 VDC load cable (para 20-60).

TM 9-2320-365-20-1

2-256.30 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Lift dust boot on 12V LOAD terminal stud
on 200 AMP reverse polarity relay.
(2) Remove nut, lockwasher, and terminal
lug TL174 from 12V LOAD terminal stud on
200 AMP reverse polarity relay. Discard
lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to terminal lug TL172.
(5) Connect negative (-) probe of multimeter to
terminal lug TL174 and note reading on
multimeter.
(6) If continuity is not present, replace 200
AMP terminal block to reverse polarity relay
12 VDC load cable (para 20-60).
(7) Position terminal lug TL172 on right 12V
LOAD terminal stud on 200 AMP terminal
block with washer, lockwasher, and nut.
(8) Tighten nut to 15-19 lb-ft (21-25 N.m).
(9) Position terminal lug TL174 on 12V LOAD
terminal stud on 200 AMP reverse polarity
relay with lockwasher and nut.

Change 1 2-256.31

TM 9-2320-365-20-1

(10) Tighten nut to 108-132 lb-in. (12-15 N.m).
(11) Position dust boot on 12V LOAD terminal
stud on 200 AMP reverse polarity relay.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL173 to
terminal lug TL171?

YES

Continuity Test or
STE/ICE-R Test #91

NO

18.

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
200 AMP terminal
block OK.
200 AMP terminal block to
PDP 12 VDC cable OK.
200 AMP terminal block to
reverse polarity relay 12 VDC
load cable OK.

POSSIBLE PROBLEMS

If continuity is not present,
200 AMP terminal block to
reverse polarity relay 12 VDC
battery cable is faulty.

Replace 200 AMP terminal
block to reverse polarity relay
12 VDC battery cable (para 20-66).

TM 9-2320-365-20-1

2-256.32 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Lift dust boot on 12V BAT terminal stud on
200 AMP reverse polarity relay.
(2) Remove nut, lockwasher, and terminal lug
TL173 from 12V BAT terminal stud on 200
AMP reverse polarity relay. Discard
lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to terminal lug TL173.
(5) Connect negative (-) probe of multimeter to
terminal lug TL171 and note reading on
multimeter.
(6) If continuity is not present, replace 200
AMP terminal block to reverse polarity relay
12 VDC battery cable (para 20-66).
(7) Position terminal lugs TL171 and TL61 on
right 12V BAT terminal stud on 200 AMP
terminal block with washer, lockwasher,
and nut.
(8) Tighten nuts to 15-19 lb-ft (21-25 N.m).
(9) Position terminal lug TL173 on 12V BAT
terminal stud on 200 AMP reverse polarity
relay with lockwasher and nut.

Change 1 2-256.33

TM 9-2320-365-20-1

(10) Tighten nut to 108-132 lb-in. (12-15 N.m).
(11) Position dust boot on 12V BAT terminal stud
on 200 AMP reverse polarity relay.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Continuity Test or
STE/ICE-R Test #91
Circuit breaker CB70 OK.
Battery(ies) OK.
Cab to chassis ground strap
OK.
PDP to cab ground cable OK.
Shunt OK.
Starter to shunt 24 VDC cable
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
200 AMP terminal
block OK.
200 AMP terminal block to
PDP 12 VDC cable OK.
200 AMP terminal block to
reverse polarity relay 12 VDC
load cable OK.
200 AMP terminal block to
reverse polarity relay 12
VDC battery cable OK.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse
polarity relay.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.

19.

Is continuity present from
terminal lug TL47 to
terminal lug TL99?
If continuity is not present,
battery to 200 AMP terminal
block 12 VDC cable assembly,
is faulty. If continuity is
present, 200 AMP reverse
polarity relay is faulty.

Replace battery to 200 AMP terminal
block 12 VDC cable assembly
(para 20-63).

Replace 200 AMP reverse
polarity relay (para 20-58).

TM 9-2320-365-20-1

2-256.34 Change 1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug TL47.
(3) Connect negative (-) probe of multimeter to
terminal lug TL99 and note reading on
multimeter.
(4) If continuity is not present, replace battery
to 200 AMP terminal block 12 VDC cable
assembly (para 20-63).
(5) If continuity is present, replace 200 AMP
reverse polarity relay (para 20-58).
(6) Install PDP cover (para 16-2).
(7) Connect batteries (para 7-48).
(8) Raise spare tire (TM 9-2320-365-10).

Change 1 2-257

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

If battery(ies) is unserviceable,
12 vdc circuits will not operate.

KNOWN INFO

POSSIBLE PROBLEMS

Service drive lights OK.
Circuit breaker CB70 OK.

e4. 24 VDC CIRCUITS DO NOT OPERATE

START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Tester, Antifreeze and Battery (Item 41, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Gloves, Rubber (Item 13, Appendix C)
Apron, Rubber (Item 3, Appendix C)
Socket Set, Socket Wrench (Item 34, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)
Wrench, Torque, 0-175 lb-ft (Item 57, Appendix C)
Wire, Relay Test (Item 9, Appendix E)

Materials/Parts
Ties, Cable, Plastic (Item 76, Appendix D)
Dispenser, Pressure Sensitive Tape
(Item 21, Appendix D)
Wire, Elect, 50 ft (Item 77, Appendix D)
Lockwasher (2) (Item 91, Appendix G) (100 AMP)
Lockwasher (2) (Item 66, Appendix G) (200 AMP)
Lockwasher (4) (Item 92, Appendix G) (200 AMP)

Personnel Required
(2)

References
TM 9-6140-200-14
TM 9-4910-571-12&P

WARNING
Read WARNING
on following page.

Are batteries serviceable?

1.

NOTE

Battery Specific Gravity Test

NO

Charge battery(ies) (TM 9-6140-200-14)
or replace battery(ies) (para 7-46).
YES

TM 9-2320-365-20-1

2-258 Change 1

Perform electrical troubleshooting e1. Circuit
Breaker Does Not Operate on circuit breaker
CB70 prior to beginning this task.

Remove and install plastic cable ties as
required.

Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.
Faulty 100 AMP reverse
polarity relay.
Faulty 100 AMP reverse
polarity relay to power
distribution panel (PDP)
24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

(1) Remove four batteries from battery box
(para 7-46).
(2) Test batteries for serviceability (TM 9-6140-
200-14).
(3) Charge battery(ies) if discharged but
serviceable (TM 9-6140-200-14).
(4) Replace battery(ies) if unserviceable (para
7-46).
(5) Install four batteries in battery box (para 7-
46).

BATTERY SPECIFIC GRAVITY TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.
Batteries can explode from a spark. Battery
acid is harmful to skin and eyes. Always wear
eye protection and rubber gloves when working
with batteries.

WARNING

Change 1 2-259

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
Is 24 VDC present at
terminal X1 on power
distribution panel (PDP)?

2.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

Go to step 10 of this fault.
YES

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

TM 9-2320-365-20-1

2-260 Change 1

Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.
Faulty 100 AMP reverse
polarity relay.
Faulty 100 AMP reverse
polarity relay to power
distribution panel (PDP)
24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Remove power distribution panel (PDP)
cover (para 16-2).
(2) Set multimeter to volts DC.

When testing to terminal X1 on PDP, ensure
that multimeter probes come in contact with
the outside metal ring. Failure to comply
may result in false troubleshooting test
results.

(3) Connect positive (+) probe of multimeter to
terminal X1 on power distribution panel
(PDP).
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 24 VDC is not present, go to step 10 of
this fault.

CAUTION

Change 1 2-261

TM 9-2320-365-20-1

KNOWN INFO

WARNING
Read WARNING
on following page.

REASON FOR QUESTION
Is 24 VDC present at circuit
breaker CB39 socket 3 on
PDP?

3.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

Go to step 13 of this fault.
YES

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.

TM 9-2320-365-20-1

2-262 Change 1

VOLTAGE TEST

(1) Remove circuit breaker CB39 from PDP.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
circuit breaker CB39 socket 3 on PDP.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 24 VDC is not present, go to step 13 of
this fault.
(6) Install circuit breaker CB39 in PDP.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 1 2-263

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

4.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

If continuity is not present,
wire 1602 is faulty.

Continuity Test or
STE/ICE-R Test #91
Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity relay
OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.

2-264 Change 1

TM 9-2320-365-20-1

Repair wire 1602 from terminal X1on
PDP to relay K2 socket 30 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

CAUTION
Read CAUTION
on following page.

Is continuity present from
relay K2 socket 30 on PDP
to terminal X1 on PDP?

Change 1 2-265

TM 9-2320-365-20-1

(1) Disconnect batteries (para 7-48)
(2) Remove relay K2 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
relay K2 socket 30 on PDP.

When testing to terminal X1 on PDP, ensure
that multimeter probes come in contact with
the outside metal ring. Failure to comply
may result in false troubleshooting test
results.

(5) Connect negative (-) probe of multimeter to
terminal X1 on PDP and note reading on
multimeter.
(6) If continuity is not present, repair wire
1602 from terminal X1 on PDP to relay
K2 socket 30 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

CONTINUITY TEST

CAUTION

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

5.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

Go to step 14 of this fault.
YES

Continuity Test or
STE/ICE-R Test #91

This question eliminates
possible problems and
determines where
troubleshooting continues.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.

Is continuity present from
relay K2 socket 86 on PDP
to circuit breaker CB70
socket 3 on PDP?

TM 9-2320-365-20-1

2-266 Change 1

CONTINUITY TEST

(1) Remove circuit breaker CB70 from PDP.
(2) Position master power switch to on
(TM 9-2320-365-10).
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
relay K2 socket 86 on PDP.
(5) Connect negative (-) probe of multimeter to
circuit breaker CB70 socket 4 on PDP and
note reading on multimeter.
(6) If continuity is not present, go to step 14
of this fault.
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Install circuit breaker CB70 in PDP.

Change 1 2-267

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
wire 3041 is faulty.

6.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty dashboard cable
assembly.

Continuity Test or
STE/ICE-R Test #91

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity relay
OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.
Master power switch OK.

Repair wire 3041 from terminal board
TB2 position 43 on PDP to relay K2 socket
85 on PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC
III dashboard cable assembly (para 7-11).

Is continuity present from
relay K2 socket 85 on PDP
to ground?

TM 9-2320-365-20-1

2-268 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K2 socket 85 on PDP.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3041
from terminal board TB2 position 43 on PDP
to relay K2 socket 85 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-269

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
relay K2 is faulty.

7.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

Replace relay K2 (para 7-9).
YES

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty dashboard cable
assembly.

Is 76-99 ohms resistance
present from relay K2
terminal 85 to terminal 86?

TM 9-2320-365-20-1

2-270 Change 1

Resistance Test or
STE/ICE-R Test #91

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity
relay OK.
100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable
OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.
Master power switch OK.

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K2 terminal 85.
(3) Connect negative (-) probe of multimeter to
relay K2 terminal 86 and note reading on
multimeter.
(4) If 76-99 ohms resistance is not present,
replace relay K2 (para 7-9).

Change 1 2-271

TM 9-2320-365-20-1

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

If 24 VDC is not present,
relay K2 is faulty.

8.

POSSIBLE PROBLEMS

Faulty relay K2.
Faulty dashboard cable
assembly.

NO

Replace relay K2 (para 7-9).
YES

Voltage Test or
STE/ICE-R Test #89

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity relay
OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable OK.
200 AMP terminal block to
power distribution panel (PDP)
24 VDC cable OK.
Master power switch OK.

Is 24 VDC present at relay
K2 socket 87 on PDP?

TM 9-2320-365-20-1

2-272 Change 1

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

TM 9-2320-365-20-1

Change 1 2-273

(1) Install relay test wire in relay K2 socket
87 on PDP.
(2) Install relay K2 in PDP.
(3) Connect batteries (para 7-48).
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter to
relay test wire.
(7) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(8) If 24 VDC is not present, replace relay
K2 (para 7-9).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Disconnect batteries (para 7-48).
(11) Remove relay K2 from PDP.
(12) Remove relay test wire from PDP relay
K2 socket 87.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

9.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

Continuity Test or
STE/ICE-R Test #91

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity relay
OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable OK.
200 AMP terminal block to
power distribution panel (PDP)
24 VDC cable OK.
Master power switch OK.
Relay K2 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

Replace bus bar X6 on PDP or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11).

If continuity is not present, wire
1604 is faulty. If continuity is
present, bus bar X6 is faulty.

Repair wire 1604 from relay K2 socket 87 on
PDP to bus bar X6 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Is continuity present from
relay K2 socket 87 on PDP
to circuit breaker CB36
socket 6 on PDP?

TM 9-2320-365-20-1

2-274 Change 1

CONTINUITY TEST

(1) Remove circuit breaker CB36 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to relay K2 socket 87 on PDP.
(4) Connect negative (-) probe of multimeter to
circuit breaker CB36 socket 6 on PDP and
note reading on multimeter.
(5) If continuity is not present, repair wire
1604 from relay K2 socket 87 on PDP to
bus bar X6 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) If continuity is present, replace bus bar X6
on PDP or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Install circuit breaker CB36 in PDP.
(8) Install relay K2 in PDP.
(9) Install power distribution panel (PDP) cover
(para 16-2).
(10) Connect batteries (para 7-48).

Change 1 2-274.1

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

Is vehicle equipped with a
100 AMP reverse polarity
relay?

TEST OPTIONS
10.
Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where to continue
troubleshooting.

Go to step 16 of this fault.
YES

NO

Faulty 100 AMP reverse polarity
relay.
Faulty 100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

TM 9-2320-365-20-1

2-274.2 Change 1

(1) Lower spare tire (TM 9-2320-365-10).
(2) Check if vehicle is equipped with 100 AMP reverse
polarity relay.
(3) If vehicle is not equipped with 100 AMP reverse
polarity relay, go to step 16 of this fault.

Change 1 2-274.3

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

11.
Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.

POSSIBLE PROBLEMS

Faulty 100 AMP reverse polarity
relay.
Faulty 100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
cable.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
terminal lug TL39 to
terminal lug TL37?

NO

YES

Replace battery to 100 AMP
reverse polarity relay 24 VDC
cable (para 7-68).

If continuity is not present,
battery to 100 AMP reverse
polarity relay 24 VDC cable is
faulty.

TM 9-2320-365-20-1

2-274.4 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48)
(2) Remove nut, terminal lug TL10, and
terminal lug TL39 from battery 24 VDC
cable.
(3) Loosen clamp on air hose.
(4) Remove air hose from intake air cleaner
boot.

Tag all terminal lug and connection points
prior to disconnecting.

(5) Lift terminal cover on 24V BAT terminal
stud on 100 AMP reverse polarity relay.
(6) Remove nut, lockwasher, and terminal lugs
TL1, TL37, and TL36 from 24V BAT
terminal stud on 100 AMP reverse polarity
relay. Discard lockwasher.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to terminal lug TL37.
(9) Connect negative (-) probe of multimeter to
terminal lug TL39 and note reading on
multimeter.
(10) If continuity is not present, replace battery to
100 AMP reverse polarity relay 24 VDC cable
(para 7-68).
(11) Lift terminal cover on 24V BAT terminal stud
on 100 AMP reverse polarity relay.
(12) Position terminal lugs TL36, TL37, and TL1 on
24V BAT terminal stud on 100 AMP reverse
polarity relay with lockwasher and nut.
(13) Tighten nut to 120-144 lb-in. (14-16 N.m).
(14) Install terminal lug TL39 and terminal lug TL10
on battery 24 VDC cable with nut.

NOTE

TM 9-2320-365-20-1

Change 1 2-274.5

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL44 to
terminal X1 on PDP?

12.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Continuity Test or
STE/ICE-R Test #91

YES

NO

Replace 100 AMP reverse polarity
relay to PDP 24 VDC cable (para 7-81).

Replace 100 AMP reverse
polarity relay (para 7-27).

If continuity is not present,
100 AMP reverse polarity relay
to PDP 24 VDC cable is faulty.
If continuity is present, 100
AMP reverse polarity relay is
faulty.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.

POSSIBLE PROBLEMS

Faulty 100 AMP reverse
polarity relay.
Faulty 100 AMP reverse
polarity relay to power
distribution panel (PDP) 24
VDC cable.

CAUTION
Read CAUTION
on following page.

TM 9-2320-365-20-1

2-274.6 Change 1

CONTINUITY TEST

(1) Lift dust boot on 24V LOAD terminal stud
on 100 AMP reverse polarity relay.
(2) Remove nut, lockwasher, and terminal lug
TL44 from 24V LOAD terminal stud on 100
AMP reverse polarity relay. Discard
lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to terminal lug TL44.

When testing to terminal X1 on PDP, ensure
that multimeter probes come in contact with
the outside metal ring. Failure to comply
may result in false troubleshooting test
results.

(5) Connect negative (-) probe of multimeter to
terminal X1 on PDP and note reading on
multimeter.
(6) If continuity is not present, replace 100
AMP reverse polarity relay to PDP 24 VDC
cable (para 7-81).
(7) If continuity is present, replace 100 AMP
reverse polarity relay (para 7-27).

CAUTION

(8) Install PDP cover (para 16-2).
(9) Position terminal lug TL44 on 24V LOAD
terminal stud on 100 AMP reverse polarity
relay with lockwasher and nut.
(10) Tighten nut to 120-144 lb-in. (14-16 N.m).
(11) Position dust boot on 24V LOAD terminal
stud on 100 AMP reverse polarity relay.
(12) Position air hose on intake air cleaner boot
with clamp.
(13) Tighten clamp to 36-48 lb-in. (4-5 N.m).
(14) Connect batteries (para 7-48)
(15) Raise spare tire (TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-274.7

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Is 24 VDC present at circuit
breaker CB30 socket 1 on
PDP?

13.

YES

Voltage Test or
STE/ICE-R Test #89

Repair wire 1602 from terminal X1
on PDP to bus bar X4 on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-274.8 Change 1

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity relay
OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable OK.
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable OK.
200 AMP terminal block to
power distribution panel (PDP)
24 VDC cable OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

Replace bus bar X4 on PDP or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

If 24 VDC is not present, wire
1602 is faulty. If 24 VDC is
present bus bar X4 is faulty.

NO

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Remove circuit breaker CB30 from PDP.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
circuit breaker CB30 socket 1 on PDP.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 24 VDC is not present, Repair wire 1602
from terminal X1on PDP to bus bar X4 on
PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).
(6) If 24 VDC is present, replace bus bar X4
on PDP or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) Install circuit breaker CB30 in PDP.
(8) Install PDP cover (para 16-2).

TM 9-2320-365-20-1

Change 1 2-274.9

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
master power switch is
faulty.

Is continuity present from
master power switch
connector pin 1 to pin 5?

14.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

Replace master power
switch (para 7-18).
YES

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable.

POSSIBLE PROBLEMS

Faulty master power switch.
Faulty dashboard cable
assembly.

TM 9-2320-365-20-1

2-274.10 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector PX17 from master
power switch connector.
(3) Position master power switch to on.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
master power switch connector pin 1.
(6) Connect negative (-) probe of multimeter to
master power switch connector pin 5 and
note reading on multimeter.
(7) If continuity is not present, replace master
power switch (para 7-18).
(8) Position master power switch to off.

TM 9-2320-365-20-1

Change 1 2-274.11

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
wire 1548 is faulty. If
continuity is present wire 1586
is faulty.

15.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

YES

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

Repair wire 1586 from connector PX17 socket 5
to circuit breaker CB70 socket 4 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly (para 7-11).

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.
Master power switch OK.

Is continuity present from
relay K2 socket 86 on PDP
to connector PX17 socket
1?

Repair wire 1548 from connector PX17 socket 1
to relay K2 socket 86 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-274.12 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(9) Install PDP cover (para 16-2).
(10) Connect batteries (para 7-48).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX17 socket 1.
(3) Connect negative (-) probe of multimeter
to relay K2 socket 86 on PDP and note
reading on multimeter.
(4) If continuity is not present, repair wire
1548 from connector PX17 socket 1
to relay K2 socket 86 on PDP (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, repair wire 1586
from connector PX17 socket 5 to circuit
breaker CB70 socket 4 on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Connect connector PX17 to master power
switch connector.
(7) Install instrument panel (para 7-15).
(8) Install relay K2 in PDP.

Change 1 2-274.13

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
200 AMP terminal block
24V BATT left terminal stud
to right terminal stud?

If continuity is not present,
200 AMP terminal block is
faulty.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Continuity Test or
STE/ICE-R Test #91

NO

YES
Replace 200 AMP terminal block
(para 20-69).

16.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

2-274.14 Change 1

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

CONTINUITY TEST

Tag terminal lugs and connection points
prior to disconnecting.
(1) Disconnect batteries (para 7-48).
(2) Remove nut, lockwasher, washer, and
terminal lugs TL37 and TL36 from left 24V
BAT terminal stud on 200 AMP terminal
block. Discard lockwasher.
(3) Remove nut, lockwasher, washer, and
terminal lugs TL1 and TL166 from right 24V
BAT terminal stud on 200 AMP terminal
block. Discard lockwasher.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to left 24V BAT terminal stud on 200 AMP
terminal block.
(6) Connect negative (-) probe of multimeter to
right 24V BAT terminal stud on 200 AMP
terminal block and note reading on
multimeter.
(7) If continuity is not present, replace 200
AMP terminal block (para 20-69).

NOTE

Change 1 2-274.15

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
200 AMP terminal block
24V LOAD left terminal stud
to right terminal stud?

If continuity is not present,
200 AMP terminal block is
faulty.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

Continuity Test or
STE/ICE-R Test #91

Replace 200 AMP terminal block
(para 20-69).

17.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

2-274.16 Change 1

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

CONTINUITY TEST

(1) Lift dust boot from left 24V LOAD terminal
stud on 200 AMP terminal block.
(2) Remove nut, lockwasher, washer, and
terminal lug TL44 from left 24V LOAD
terminal stud on 200 AMP terminal
block. Discard lockwasher.
(3) Remove nut, lockwasher, washer, and
terminal lug TL167 from right 24V LOAD
terminal stud on 200 AMP terminal block.
Discard lockwasher.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to left 24V LOAD terminal stud on 200
AMP terminal block.
(6) Connect negative (-) probe of multimeter to
right 24V LOAD terminal stud on 200 AMP
terminal block and note reading on
multimeter.
(7) If continuity is not present, replace 200
AMP terminal block (para 20-69).

Change 1 2-274.17

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
battery to 200 AMP terminal
block 24 VDC cable assembly
is faulty.

Is continuity present from
terminal lug TL39 to
terminal lug TL37?

WARNING
Read WARNING
on following page.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

Continuity Test or
STE/ICE-R Test #91

Replace battery to 200 AMP terminal
block 24 VDC cable assembly
(para 20-64).

18.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
200 AMP terminal block OK.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

2-274.18 Change 1

Faulty 200 AMP reverse
polarity relay OK.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

CONTINUITY TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Remove nut and terminal lugs TL39 and
TL10 from battery 24 VDC cable.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL39.
(4) Connect negative (-) probe of multimeter to
terminal lug TL37 and note reading on
multimeter.
(5) If continuity is not present, replace battery
to 200 AMP terminal block 24 VDC cable
assembly (para 20-64).
(6) Position terminal lugs TL36 and TL37 on
left 24V BAT terminal stud on 200 AMP
terminal block with washer, lockwasher,
and nut.
(7) Tighten nut to 15-19 lb-ft (21-25 N.m).
(8) Install terminal lugs TL10 and TL39 on
battery 24 VDC cable with nut.

Change 1 2-274.19

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL166 to
terminal lug TL168?
If continuity is not present,
200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable is faulty.

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

Continuity Test or
STE/ICE-R Test #91

Replace 200 AMP terminal block to
reverse polarity relay 24 VDC
battery cable (para 20-67).

19.

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

2-274.20 Change 1

CONTINUITY TEST

(1) Lift dust boot on 24V BAT terminal stud on
200 AMP reverse polarity relay.
(2) Remove nut, lockwasher, terminal lug
TL168 from 24V BAT terminal stud on 200
AMP reverse polarity relay. Discard
lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to terminal lug TL166.
(5) Connect negative (-) probe of multimeter to
terminal lug TL168 and note reading on
multimeter.
(6) If continuity is not present, replace 200
AMP terminal block to reverse polarity
relay 24 VDC battery cable (para 20-67).
(7) Position terminal lug TL168 on 24V BAT
terminal stud on 200 AMP reverse polarity
relay with lockwasher and nut.
(8) Tighten nut to 27-33 lb-ft (37-45 N.m).
(9) Position dust boot on 24 V BAT terminal
stud on 200 AMP reverse polarity relay.
(10) Position terminal lugs TL166 and TL1 on
right 24 VDC BAT terminal stud on 200
AMP terminal block with washer,
lockwasher, and nut.
(11) Tighten nut to 15-19 lb-ft (21-25 N.m).

Change 1 2-274.21

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
terminal lug TL169 to
terminal lug TL167?

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

NO

YES

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
200 AMP terminal block to
reverse polarity relay 24 VDC
load cable is faulty. If
continuity is present, 200 AMP
terminal block to PDP 24 VDC
cable is faulty.

Replace 200 AMP terminal block to
reverse polarity relay 24 VDC
load cable (para 20-62).

20.

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block
to reverse polarity relay 24
VDC battery cable OK.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

TM 9-2320-365-20-1

2-274.22 Change 1

CONTINUITY TEST

(10) Position terminal lug TL169 on 24V LOAD
terminal stud on 200 AMP reverse polarity
relay with lockwasher and nut.
(11) Tighten nut to 27-33 lb-ft (37-45 N.m).
(12) Position dust boot on 24V LOAD terminal
stud on 200 AMP reverse polarity relay.

(1) Lift dust boot on 24V LOAD terminal stud
on 200 AMP reverse polarity relay.
(2) Remove nut, lockwasher, and terminal lug
TL169 from 24V LOAD terminal stud on
200 AMP reverse polarity relay. Discard
lockwasher.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to terminal lug TL169.
(5) Connect negative (-) probe of multimeter to
terminal lug TL167 and note reading on
multimeter.
(6) If continuity is not present, replace 200
AMP terminal block to reverse polarity
relay 24 VDC load cable (para 20-62).
(7) If continuity is present, replace 200 AMP
terminal block to PDP 24 VDC cable (para
20-62).
(8) Position terminal lug TL167 on right 24V
LOAD terminal stud on 200 AMP terminal
block with washer, lockwasher, and nut.
(9) Tighten nut to 15-19 lb-ft (21-25 N.m).

Change 1 2-274.23

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)

Continuity Test or
STE/ICE-R Test #91

21.
KNOWN INFO

Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable assembly
OK.
200 AMP terminal block
to reverse polarity relay 24
VDC battery cable OK.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.

Is continuity present from
terminal X1 on PDP to
terminal lug TL44?

NO

YES

Replace 200 AMP reverse
polarity relay (para 20-58).

Replace 200 AMP terminal block to
PDP 24 VDC cable (para 20-68).

If continuity is not present,
200 MAP terminal block to
PDP 24 VDC cable is faulty. If
continuity is present, 200 AMP
reverse polarity relay is faulty.

TM 9-2320-365-20-1

2-274.24 Change 1

CONTINUITY TEST

CAUTION

(10) Connect batteries (para 7-48).
(11) Raise spare tire (TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-275/(2-276 Blank)
All data on pages 2-276 thru 2-299,
including pages 2-277 thru 2-298, deleted.

(1) Set multimeter to ohms.

When testing to terminal X1 on PDP,
ensure that multimeter probes come in
contact with the outside metal ring.
Failure to comply may result in false
troubleshooting test results.

(2) Connect positive (+) probe of multimeter
to terminal X1 on PDP.
(3) Connect negative (-) probe of multimeter to
terminal lug TL44 and note reading on
multimeter.
(4) If continuity is not present, replace 200
AMP terminal block to PDP 24 VDC cable
(para 20-68).
(5) If continuity is present, replace 200 AMP
reverse polarity relay (para 20-58).
(6) Position terminal lug TL44 on left 24V
LOAD terminal stud on 200 AMP terminal
block with washer, lockwasher, and nut.
(7) Tighten nut to 15-19 lb-ft (21-25 N.m)
(8) Position dust boot on left 24V LOAD
terminal stud on 200 AMP terminal block.
(9) Install PDP cover (para 16-2).

e6. ENGINE CRANKS BUT DOES NOT START

NOTE

YES
Go to step 3 of this fault.

START

WARNING
Read WARNING
on following page.

Is 24 vdc present on
terminal lug TL28?

1.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

REASON FOR QUESTION

NO

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Cab raised (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.

POSSIBLE PROBLEMS

Faulty start inhibit pushbutton
switch.
Faulty relay K19.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty fuel shutoff solenoid.

Perform Engine System Troubleshooting a2.
Engine Cranks But Does Not Start prior
to beginning this task.

TM 9-2320-365-20-1

(2-299 Blank)/2-300 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
terminal lug TL28 on fuel solenoid.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, go to step 3 of
this fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-301

TM 9-2320-365-20-1

e6. ENGINE CRANKS BUT DOES NOT START (CONT)

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 4 of this fault.

Notify DS Maintenance to perform Fuel System
Troubleshooting task a.1.1 Engine Cranks But
Does Not Start.

KNOWN INFO
3.

WARNING
Read WARNING
on following page.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 24 VDC is not present, go to
step 5 of this fault. If 24 VDC
is present, start inhibit
pushbutton switch is faulty.

YES

NO

Go to step 5 of this fault.

Replace start inhibit pushbutton
switch (para 7-19).

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Relay K19 OK.
Start inhibit pushbutton
switch OK.

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty fuel shutoff solenoid.

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.

Faulty start inhibit pushbutton
switch.
Faulty relay K19.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

POSSIBLE PROBLEMS

Is 24 VDC present at relay
K19 socket 86 on power
distribution panel (PDP)?

Is continuity present from
terminal lug TL29 to
ground?

TM 9-2320-365-20-1

2-302 Change 1

CONTINUITY TEST

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
terminal lug TL29 on fuel solenoid.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 4 of
this fault.
(5) If continuity is present, fuel solenoid is
faulty, notify DS Maintenance.
(6) Lower cab (TM 9-2320-365-10).

Change 1 2-303

TM 9-2320-365-20-1

(1) Lower cab (TM 9-2320-365-10).
(2) Remove power distribution panel (PDP)
cover (para 16-2).
(3) Remove relay K19 from power distribution
panel (PDP).
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to relay K19 socket 86 on power
distribution panel (PDP).
(6) Connect negative (-) probe of multimeter to
ground
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 5 of
this fault.
(9) If 24 VDC is present, replace start inhibit
pushbutton switch (para 7-19).
(10) Position master power switch to off
(TM 9- 2320-365-10).

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

TEST OPTIONS

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

If continuity is not present,
wire 3015 from connector J31
pin 5 to terminal board TB2
position 18 on power
distribution panel (PDP) is
faulty. If continuity is present,
wire 3015 from connector P31
socket 5 to terminal lug TL29
is faulty.

e6. ENGINE CRANKS BUT DOES NOT START (CONT)

Is continuity present from
connector J31pin 5 to
ground?

4.

CAUTION
Read CAUTION
on following page.

Repair wire 3015 from connector P31
socket 5 to terminal lug TL29 (para 2-40)
or replace engine control cable
assembly (para 7-72).

NO

YES

Repair wire 3015 from connector J31 pin 5
to terminal board TB2 position 18 on power
distribution panel (PDP) (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-304 Change 1

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Start inhibit pushbutton switch
OK.
Relay K19 OK.

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-305

TM 9-2320-365-20-1

(11) Connect batteries (para 7-48).

(1) Disconnect batteries (para 7-48).
(2) Remove instrument panel assembly for
access (para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector J31pin 5.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire
3015 from connector J31 pin 5 to terminal
board TB2 position 18 on power
distribution PDP (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If continuity is present, repair wire 3015
from connector P31 socket 5 to terminal
lug TL29 (para 2-40) or replace engine
control cable assembly (para 7-72).
(9) Connect connector J31 to connector P31.
(10) Install instrument panel assembly (para
7-15).

KNOWN INFO

Is continuity present from
relay K19 terminals 30 to
87A?

TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
relay K19 is faulty.

YES

5.

e6. ENGINE CRANKS BUT DOES NOT START (CONT)

POSSIBLE PROBLEMS

Faulty relay K19.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

NO

Continuity Test or
STE/ICE-R Test #91

Replace relay K19 (para 7-9).

TEST OPTIONS

REASON FOR QUESTION

YES

6.

WARNING
Read WARNING
on following page.
KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 8 of this fault.

NO

Is 24 VDC present from
relay K19 socket 30 on
PDP?

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Start inhibit pushbutton switch
OK.

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Start inhibit pushbutton switch
OK.
Relay K19 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TM 9-2320-365-20-1

2-306 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K19 terminal 87a.
(3) Connect negative (-) probe of multimeter to
relay K19 terminal 30 and note reading on
multimeter.
(4) If continuity is not present, replace relay
K19 (para 7-9).

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) of multimeter to
relay K19 socket 30 on PDP.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 VDC is not present, go to step 8 of this
fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-306.1

KNOWN INFO
7.
TEST OPTIONS

REASON FOR QUESTION

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

Repair wire 54 from connector P31
socket 14 to terminal lug TL28 (para 2-40)
or replace engine control cable assembly
(para 7-72).

Is continuity present from
relay K19 socket 87A to
connector J31 pin 14?

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Start inhibit pushbutton switch
OK.
Relay K19 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

If continuity is not present,
wire 54 from relay K19 socket
87A on PDP to connector J31
pin 14 is faulty. If continuity
is present, wire 54 from
connector P31 socket 14 to
terminal lug TL28 is faulty.

YES

NO

Repair wire 54 from relay K19 socket
87A on PDP to connector J31 pin 14
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-306.2 Change 1

e6. ENGINE CRANKS BUT DOES NOT START (CONT)

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(11) Install relay K19 in PDP.
(12) Install PDP cover (para 16-2).
(13) Connect batteries (para 7-48).

(1) Disconnect batteries (para 7-48).
(2) Remove instrument panel for access
(para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to relay K19 socket 87A on PDP.
(6) Connect negative (-) probe of multimeter to
connector J31 pin 14 and note reading on
multimeter.
(7) If continuity is not present, repair wire 54
from connector J31 pin 14 to relay K19
socket 87A on PDP (para 2-40) or replace
WTEC II dashboard cable assembly (7-10)
or WTEC III dashboard cable assembly
(para 7-11).
(8) If continuity is present, repair wire 54 from
connector P31 socket 14 to terminal lug TL
28 (para 2-40) or replace engine control
cable assembly (para 7-72).
(9) Connect connector J31 to connector P31.
(10) Install instrument panel (para 7-15).

Change 1 2-306.3

TM 9-2320-365-20-1

e6. ENGINE CRANKS BUT DOES NOT START (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

8.

Is 24 VDC present at
terminal board TB1 position
59?

WARNING
Read WARNING
on following page.

If 24 VDC is not present, wire
1690 is faulty. If 24 VDC is
present, wire 1462 is faulty.

Voltage Test or
STE/ICE-R Test #89

NO

Repair wire 1462 from terminal board TB1
position 59 on PDP to relay K19 socket
87A on PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).

Fuel quantity OK.
Fuel/water separator primed.
Air cleaner hose or tube OK.
Start inhibit pushbutton switch
OK.
Relay K19 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TM 9-2320-365-20-1

2-306.4 Change 1

Repair wire 1690 from terminal board
TB1 position 61 on PDP to circuit breaker
CB79 socket 5 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-307

TM 9-2320-365-20-1

(1) Install relay K19 in PDP.
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to terminal board TB1 position 59 on PDP.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, repair wire 1690
from terminal board TB1 position 61 on
PDP to circuit breaker CB79 socket 5 on
PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

VOLTAGE TEST

WARNING

(9) If 24 VDC is present, repair wire 1462 from
terminal board TB1 position 59 on PDP to
relay K19 socket 87A on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(10) Install PDP on dashboard with three
washers and screws.
(11) Install three screws in PDP.
(12) Install PDP cover (para 16-2).

e7. FUEL GAGE DOES NOT OPERATE OR IS INACCURATE

KNOWN INFO

POSSIBLE PROBLEMS

WARNING

CAUTION

1.
TEST OPTIONS

REASON FOR QUESTION
If 24 vdc is not present,
wire 1546 is faulty.

YES

NO

START

Read WARNING and
CAUTION on
following page.

Is 24 vdc present on
connector PX9 pin 3?

Voltage Test or
STE/ICE-R Test #89

Lighted indicator display OK.
FUEL gage illuminates.

Faulty dashboard
cable assembly.
Faulty FUEL gage.
Faulty start and charging
cable assembly.
Faulty fuel level sensor.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Repair wire 1546 form connector
PX9 to terminal block TB1 position 61
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-308 Change 1

VOLTAGE TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector clamp from fuel gage
connector.
(3) Disconnect connector PX9 from fuel gage
connector.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter
to connector PX9-3.
(6) Connect negative (-) probe of multimeter
to a known good ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1546
from connector PX9 pin 3 to terminal board
TB1 position 61 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

TM 9-2320-365-20-1

Change 1 2-309

KNOWN INFO

POSSIBLE PROBLEMS

YES

2.

NO

TEST OPTIONS

Resistance Test or
STE/ICE-R Test #91

REASON FOR QUESTION

CAUTION
Read CAUTION
on following page.

KNOWN INFO

POSSIBLE PROBLEMS

3.

YES
Go to step 5 of this fault.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

NO

CAUTION
Read CAUTION
on following page.

Lighted indicator display OK.
FUEL gage illuminates.

Faulty FUEL gage.
Faulty dashboard
cable assembly.
Faulty start and charging
cable assembly.
Faulty fuel level sensor.

Replace FUEL gage
(para 7-14).

If greater than 30 ohms is
present, FUEL gage is faulty.

Is less than 30 ohms
present from connector
PX9 pin 4 to a known
good ground?

e7. FUEL GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

TM 9-2320-365-20-1

2-310 Change 1

Lighted indicator display OK.
FUEL gage illuminates.
FUEL gage OK.

Faulty dashboard
cable assembly.
Faulty start and charging
cable assembly.
Faulty fuel level sensor.

Is continuity present
from connector PX9
pin 4 to connector
P82 pin 1?

If continuity is not present,
wire 28 is faulty.

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

TM 9-2320-365-20-1

Change 1 2-311

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX9 pin 4.
(3) Connect negative (-) probe of multimeter
to a known good ground and note reading
on multimeter.
(4) If greater than 30 ohms is present, replace
FUEL gage (para 7-14).

RESISTANCE TEST

(1) Disconnect connector clamp from fuel level
sensor.
(2) Disconnect connector P82 from fuel level
sensor.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector PX9 pin 4.
(5) Connect negative (-) probe of multimeter
to connector P82 pin 1 and note reading
on multimeter.
(6) If continuity is not present, go to step 5 of
this fault.

KNOWN INFO
4.

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

CAUTION
Read CAUTION
on following page.

YES

NO

Is continuity present
from connector P82
pin 2 to a known good
ground?

e7. FUEL GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

TM 9-2320-365-20-1

2-312 Change 1

POSSIBLE PROBLEMS

Lighted indicator display OK.
FUEL gage illuminates.
FUEL gage OK.
Dashboard cable
assembly OK.

Faulty start and charging
cable assembly.
Faulty fuel level sensor.

If continuity is not present,
wire 3001 is faulty. If
continuity is present, fuel
level sensor is faulty.

Repair wire 3001 from connector
P82 pin 2 to terminal lug TL83
(para 2-40) or replace start and
charging cable assembly
(para 7-82).

Replace fuel level sensor
(para 4-8).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-312.1

TM 9-2320-365-20-1

(1) Connect connector PX9 to fuel gage
connector.
(2) Connect connector clamp on fuel gage
connector.
(3) Install instrument panel assembly
(para 7-15).
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector P82 socket 2.
(6) Connect negative (-) probe of multimeter
to a known good ground and note
reading on multimeter.
(7) If continuity is not present, repair wire
3001 from connector P82 socket 2 to
terminal lug TL83 (para 2-40) or replace
start and charging cable assembly
(para 7-82).
(8) If continuity is present, replace fuel level
sensor (para 4-8).
(9) Connect connector P82 to fuel level
sensor.
(10) Connect connector clamp on fuel level
sensor.

CONTINUITY TEST

KNOWN INFO

YES

5.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

NO

CAUTION
Read CAUTION
on following page.

e7. FUEL GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

TM 9-2320-365-20-1

2-312.2 Change 1

POSSIBLE PROBLEMS

Lighted indicator display OK.
FUEL gage illuminates.
FUEL gage OK.
Fuel level sensor OK.

Faulty dashboard
cable assembly.
Faulty start and charging
cable assembly.

Is continuity present
from connector J43
socket 3 to connector
PX9 pin 4?

If continuity is not present,
wire 28 in dashboard cable
assembly is faulty. If
continuity is present, wire
28 in start and charging
cable assembly is
faulty.

Repair wire 28 from connector
J43 socket 3 to connector PX9
pin 4 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 28 from connector
P43 pin 3 to connector P82 pin
1 (para 2-40) or replace start
and charging cable assembly
(para 7-82).

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

TM 9-2320-365-20-1

Change 1 2-313

(1) Connect connector P82 to fuel level
sensor.
(2) Connect connector clamp on fuel level
sensor.
(3) Disconnect connector J43 from
connector P43.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector J43 socket 3.
(6) Connect negative (-) probe of multimeter
to PX9 pin 4 and note reading
on multimeter.
(7) If continuity is not present, repair wire 28
from connector PX9 pin 4 to connector
J43 socket 3 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If continuity is present, repair wire 28
from connector P43 pin 3 to connector
P82 pin 1(para 2-40) or replace start and
charging cable assembly (para 7-82).
(9) Connect connector J43 to connector P43.
(10) Connect connector PX9 to fuel gage
connector.
(11) Connect connector clamp on fuel gage
connector.
(12) Install instrument panel assembly
(para 7-15).

KNOWN INFO
1.

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

TEST OPTIONS

CAUTION

WARNING

Read WARNING and
CAUTION on
following page.

START

NO

Lighted indicator display OK.
WATER TEMP gage illuminates.
POSSIBLE PROBLEMS
Is 24 vdc present on
connector PX11 pin 3?

Faulty dashboard cable
assembly.
Faulty WATER TEMP gage.
Faulty engine control cable
assembly.
Faulty WATER TEMP gage
sensor.

If 24 vdc is not present, wire
1546 is faulty.

YES

e8. WATER TEMP GAGE DOES NOT OPERATE OR IS INACCURATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Repair wire 1546 from connector PX11 pin 3
to terminal board TB1 position 61 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-314 Change 1

VOLTAGE TEST
(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector clamp from WATER
TEMP gage connector.
(3) Disconnect connector PX11 from WATER
TEMP gage connector.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter
to connector PX11 pin 3.
(6) Connect negative (-) probe of multimeter
to ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1546
from connector PX11 pin 3 to terminal board
TB1 position 61 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 1 2-315

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

Faulty WATER TEMP gage.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty WATER TEMP gage
sensor.

2.
TEST OPTIONS

Resistance Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If less than 750 ohms
resistance is present,
WATER TEMP gage
is faulty.

CAUTION
Read CAUTION
on following page.

YES

NO

Replace WATER TEMP
gage (para 7-14)

e8. WATER TEMP GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Lighted indicator display OK.
WATER TEMP gage illuminates.

TM 9-2320-365-20-1

2-316 Change 1

Is less than 750 ohms
present from connector
PX11 pin 4 to a known
good ground?

RESISTANCE TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

TM 9-2320-365-20-1

Change 1 2-316.1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX11 pin 4.
(3) Connect negative (-) probe of multimeter
to a known good ground
and note reading on multimeter.
(4) If less than 750 ohms is present, go to
step 3 of this fault.
(5) If greater than 750 ohms is present,
replace WATER TEMP gage (para 7-14).

KNOWN INFO
Lighted indicator display OK.
WATER TEMP gage illuminates.
WATER TEMP gage OK.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty WATER TEMP gage
sensor.

3.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is present, WATER
TEMP gage sensor is faulty.

CAUTION
Read CAUTION
on following page.

Replace WATER TEMP gage
sensor (para 7-42).

Go to step 4 of this fault.
YES

NO

TM 9-2320-365-20-1

2-316.2 Change 1

Is continuity present
from connector PX11
pin 4 to connector P41?

e8. WATER TEMP GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

CONTINUITY TEST

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector clamp from WATER
TEMP gage sensor connector, if equipped.
(3) Disconnect connector P41 from WATER
TEMP gage sensor connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector PX11 pin 4.
(6) Connect negative (-) probe of multimeter
to connector P41 and note reading
on multimeter.
(7) If continuity is not present, go to step 4
of this fault.
(8) If continuity is present, replace WATER
TEMP gage sensor (para 7-42).
(9) Connect connector P41 to WATER TEMP
gage sensor connector.
(10) Connect connector clamp to WATER
TEMP gage sensor connector, if equipped.
(11) Lower cab (TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-316.3

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

Lighted indicator display OK.
WATER TEMP gage illuminates.
WATER TEMP gage OK.
WATER TEMP gage sensor OK.

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

4.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 33 in dashboard cable
assembly is faulty. If
continuity is present, wire
33 in engine control cable
assembly is faulty.

NO

CAUTION
Read CAUTION
on following page.

Is continuity present
from connector PX11 pin
4 to connector J31 pin 20?

Repair wire 33 from connector P31
socket 20 to connector P41 (para 2-40)
or replace engine control cable
assembly (para 7-72).

YES

Repair wire 33 from connector PX11 pin
4 to connector J31 pin 20 (para 2-40).
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para7-11).

e8. WATER TEMP GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

TM 9-2320-365-20-1

2-316.4 Change 1

(10) Install instrument panel assembly (para 7-15).

CONTINUITY TEST
(1) Disconnect connector J31 from connector
P31.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector PX11 pin 4.
(4) Connect negative (-) probe of multimeter
to connector J31 pin 20 and note reading on
multimeter.
(5) If continuity is not present, repair wire
33 from connector PX11 pin 4 to connector
J31 pin 20 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(6) If continuity is present, repair wire 33 from
connector P31 socket 20 to connector P41
(para 2-40) or replace engine control
cable assembly (para 7-72).
(7) Connect connector J31 to connector P31.
(8) Connect connector PX11 to WATER
TEMP gage connector.
(9) Connect connector clamp on WATER
TEMP gage connector.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

TM 9-2320-365-20-1

Change 1 2-317

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.

POSSIBLE PROBLEMS

Faulty rear brake air pressure
transmitter.
Faulty REAR BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

Operational Test

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

YES

START

Go to step 4 of this fault.

1.

Does REAR BRAKE AIR
pressure gage operate?

TM 9-2320-365-20-1

2-318 Change 1

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-300 lb-in. (Item 58.1, Appendix C)

References
TM 9-4910-571-12&P

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Air tanks drained (TM9-2320-365-10)

Personnel Required
(2)

Materials/Parts
Nut, Self-Locking (Item 148, Appendix G)
Antiseize Compound (Item 14, Appendix D)
Ties, Cable, Plastic (Item 76, Appendix D)

OPERATIONAL TEST

TM 9-2320-365-20-1

Change 1 2-319

(1) Start engine (TM 9-2320-365-10).
(2) Allow vehicle to build air pressure.
(3) Note reading on REAR BRAKE AIR pressure
gage.
(4) If REAR BRAKE AIR pressure gage reads 0
PSI, go to step 4 of this fault.
(5) Shut down engine (TM 9-2320-365-10).

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.

POSSIBLE PROBLEMS

Faulty rear brake air pressure
transmitter.
Faulty REAR BRAKE AIR
pressure gage.

Visual Inspection

NO

YES

Is mounting surface
between air pressure
transmitters mounting
bracket and dashboard free
from corrosion and are all
fittings and hardware tight?

If mounting surfaces are not
free of corrosion or fittings and
hardware are not tight the
pressure transmitter will give
a faulty reading.

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Clean mounting surfaces of dashboard and
air pressure transmitters mounting bracket,
if needed. Tighten rear air brake pressure
transmitter, all fittings, and hardware to
ensure a good ground.

TM 9-2320-365-20-1

2-320 Change 1

OPERATIONAL TEST

NOTE

(1) Remove instrument panel assembly for
access (para 7-15).

Note orientation of brackets on dashboard
prior to removing.

(2) Remove self-locking nut, air pressure
transmitters mounting bracket, screw and
bracket from dashboard. Discard self-locking
nut.
(3) Inspect dashboard and air pressure
transmitters mounting bracket mounting
surfaces for corrosion.
(4) If mounting surfaces between air pressure
transmitters mounting bracket and
dashboard are not free of corrosion or all
fittings and hardware are not tight, clean
mounting surfaces if needed. Tighten rear
brake air pressure transmitter, all fittings,
and hardware to ensure a good ground.
(5) Position bracket, screw, air pressure
transmitters mounting bracket, and
self-locking nut on dashboard.
(6) Tighten self-locking nut to 168-192 lb-in.
(19-21 N.m).
(7) Install instrument panel assembly
(para 7-15).

Change 1 2-320.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty REAR BRAKE AIR
pressure gage.
Faulty rear brake air pressure
transmitter.

NO

YES

Operational Test

3.

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Does REAR BRAKE AIR
pressure gage operate
normally with a known good
rear brake air pressure
transmitter?

If REAR BRAKE AIR pressure
gage does not operates, REAR
BRAKE AIR pressure gage is
faulty. If REAR BRAKE AIR
pressure gage does operate,
rear brake air pressure
transmitter is faulty.

Replace REAR BRAKE AIR
pressure gage (para 7-14).

Replace rear brake air pressure
transmitter (para 7-36).

TM 9-2320-365-20-1

2-320.2 Change 1

CONTINUITY TEST

(1) Replace rear brake air pressure transmitter
(para 7-36).
(2) Start engine (TM 9-2320-365-10).
(3) Observe REAR BRAKE AIR pressure gage
and allow vehicle to build air pressure.
(4) If REAR BRAKE AIR pressure gage does not
operate normally, replace REAR BRAKE
AIR pressure gage (para 7-14).
(5) If REAR BRAKE AIR pressure gage does
operate normally, replace rear brake air
pressure transmitter (para 7-36).
(6) Shut down engine (TM 9-2320-365-10).

Change 1 2-320.3

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.

POSSIBLE PROBLEMS

Voltage Test or
STE/ICE-R Test #89

Is 24 VDC present at
connector PX5 pin 3?

NO

YES

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

4.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

If 24 VDC is not present, wire
1546 is faulty.

Faulty rear brake air pressure
transmitter.
Faulty REAR BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

Repair wire 1546 from connector PX5
pin 3 to connector PX4 pin 3 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-320.4 Change 1

VOLTAGE TEST

CAUTION

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

NOTE

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector clamp from REAR
BRAKE AIR pressure gage connector.
(3) Disconnect connector PX5 from REAR
BRAKE AIR pressure gage connector.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector PX5 pin 3.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on (TM 9-
2320-365-10).
(8) If 24 VDC is not present, repair wire 1546
from connector PX5 pin 3 to connector
PX4 pin 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(9) Position master power switch to off (TM 9-
2320-365-10).

Change 1 2-320.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

If continuity is not present,
ground is faulty.

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.

POSSIBLE PROBLEMS

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

NO

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1792 is faulty.

5.

FRONT BRAKE AIR pressure
gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty REAR BRAKE AIR
pressure gage.
Faulty rear brake air pressure
transmitter.

Faulty rear brake air pressure
transmitter.
Faulty REAR BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

6.

Is continuity present from
connector PX5 pin 4 to
terminal lug TL151?

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Is continuity present from
rear brake air pressure
transmitter housing to
ground?

Tighten rear brake air pressure transmitter
and fittings to ensure a good ground.

Replace wire 1792 from connector PX5 pin
4 to terminal lug TL151 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-320.6 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

CAUTION

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

NOTE

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to rear air brake pressure transmitter
housing.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, tighten rear
brake air pressure transmitter and fittings
to ensure a good ground.
(5) Connect connector PX5 to REAR BRAKE
AIR pressure gage connector.
(6) Connect connector clamp to REAR BRAKE
AIR pressure gage connector.

Install plastic cable ties as required.

(7) Install instrument panel assembly
(para 7-15).

NOTE

Remove plastic cable ties as required.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX5 pin 4.
(3) Connect negative (-) probe of multimeter to
terminal lug TL151 and note reading on
multimeter.
(4) If continuity is not present, replace wire
1792 from connector PX5 pin 4 to
terminal lug TL151 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-320.7

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

FRONT BRAKE AIR pressure
gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty REAR BRAKE AIR
pressure gage.
Faulty rear brake air pressure
transmitter.

7.

NO

YES

Operational Test

e9. REAR BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Replace REAR BRAKE AIR
pressure gage (para 7-14).

If REAR BRAKE AIR pressure
gage does not operates, REAR
BRAKE AIR pressure gage is
faulty. If REAR BRAKE AIR
pressure gage does operate,
rear brake air pressure
transmitter is faulty.

Does REAR BRAKE AIR
pressure gage operate with
a known good rear air brake
pressure transmitter?

Replace rear brake air pressure
transmitter (para 7-36).

TM 9-2320-365-20-1

2-320.8 Change 1

CONTINUITY TEST

(1) Replace rear brake air pressure transmitter
(para 7-36).
(2) Start engine (TM 9-2320-365-10).
(3) Allow vehicle to build air pressure.
(4) Note reading on REAR BRAKE AIR pressure
gage.
(5) If REAR BRAKE AIR pressure gage does not
operate, replace REAR BRAKE AIR pressure
gage (para 7-14).
(6) If REAR BRAKE AIR pressure gage does
operate, replace rear brake air pressure
transmitter (para 7-36).
(7) Shut down engine (TM 9-2320-365-10).

Change 1 2-321

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
POSSIBLE PROBLEMS

Operational Test

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

YES

START

Go to step 4 of this fault.

1.

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE

FUEL gage OK.

Faulty front brake air pressure
transmitter.
Faulty FRONT BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

Does FRONT BRAKE AIR
pressure gage operate?

TM 9-2320-365-20-1

2-322 Change 1

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Air tanks drained (TM9-2320-365-10)

Personnel Required
(2)

Materials/Parts
Nut, Self-Locking (Item 148, Appendix G)
Antiseize Compound (Item 14, Appendix D)
Ties, Cable, Plastic (Item 76, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-300 lb-in. (Item 58.1, Appendix C)

References
TM 9-4910-571-12&P

OPERATIONAL TEST

Change 1 2-323

TM 9-2320-365-20-1

(1) Start engine (TM 9-2320-365-10).
(2) Allow vehicle to build air pressure.
(3) Note reading on FRONT BRAKE AIR
pressure gage.
(4) If FRONT BRAKE AIR pressure gage reads
0 PSI, go to step 4 of this fault.
(5) Shut down engine (TM 9-2320-365-10).

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION
POSSIBLE PROBLEMS

Visual Inspection

NO

YES

Is mounting surface
between air pressure
transmitters mounting
bracket and dashboard free
from corrosion and are all
fittings and hardware tight?

If mounting surfaces are not
free of corrosion or fittings and
hardware are not tight the
pressure transmitter will give
a faulty reading.

FUEL gage OK.

Faulty front brake air pressure
transmitter.
Faulty FRONT BRAKE AIR
pressure gage.

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Clean mounting surfaces of dashboard and
air pressure transmitters mounting bracket,
if needed. Tighten front brake air pressure
transmitter, all fittings, and hardware to
ensure a good ground.

TM 9-2320-365-20-1

2-324 Change 1

OPERATIONAL TEST

NOTE

(1) Remove instrument panel assembly for
access (para 7-15).

Note orientation of brackets on dashboard
prior to removing.

(2) Remove self-locking nut, air pressure
transmitters mounting bracket, screw and
bracket from dashboard. Discard self-locking
nut.
(3) Inspect dashboard and air pressure
transmitters mounting bracket mounting
surfaces for corrosion.
(4) If mounting surfaces between air pressure
transmitters mounting bracket and
dashboard are not free of corrosion or all
fittings and hardware are not tight, clean
mounting surfaces if needed. Tighten front
brake air pressure transmitter, all fittings,
and hardware to ensure a good ground.
(5) Position bracket, screw, air pressure
transmitters mounting bracket, and
self-locking nut on dashboard.
(6) Tighten self-locking nut to 168-192 lb-in.
(19-21 N.m).
(7) Install instrument panel assembly
(para 7-15).

Change 1 2-324.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Operational Test

3.

FUEL gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty FRONT BRAKE AIR
pressure gage.
Faulty front brake air pressure
transmitter.

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Does FRONT BRAKE AIR
pressure gage operate
normally with a known good
rear air pressure
transmitter?

Replace FRONT BRAKE AIR
pressure gage (para 7-14).

If FRONT BRAKE AIR pressure
gage does not operates,
FRONT BRAKE AIR pressure
gage is faulty. If FRONT
BRAKE AIR pressure gage
does operate, front brake air
pressure transmitter is faulty.

Replace front brake air pressure
transmitter (para 7-36).

TM 9-2320-365-20-1

2-324.2 Change 1

CONTINUITY TEST

(1) Replace front brake air pressure transmitter
(para 7-36).
(2) Start engine (TM 9-2320-365-10).
(3) Observe FRONT BRAKE AIR pressure gage
and allow vehicle to build air pressure.
(4) If FRONT BRAKE AIR pressure gage does
not operate normally, replace FRONT
BRAKE AIR pressure gage (para 7-14).
(5) If FRONT BRAKE AIR pressure gage does
operate normally, replace front brake air
pressure transmitter (para 7-36).
(6) Shut down engine (TM 9-2320-365-10).

Change 1 2-324.3

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
POSSIBLE PROBLEMS

Voltage Test or
STE/ICE-R Test #89

NO

YES

4.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

If 24 VDC is not present, wire
1546 is faulty.

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

FUEL gage OK.

Faulty front brake air pressure
transmitter.
Faulty FRONT BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

Is 24 VDC present at
connector PX4 pin 3?

Repair wire 1546 from connector PX4
pin 3 to connector PX9 pin 3 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-324.4 Change 1

VOLTAGE TEST

CAUTION

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector clamp from FRONT
BRAKE AIR pressure gage connector.
(3) Disconnect connector PX4 from FRONT
BRAKE AIR pressure gage connector.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector PX4 pin 3.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on (TM 9-
2320-365-10).
(8) If 24 VDC is not present, repair wire 1546
from connector PX4 pin 3 to connector
PX9 pin 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(9) Position master power switch to off (TM 9-
2320-365-10).

NOTE

Change 1 2-324.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

If continuity is not present,
ground is faulty.

REASON FOR QUESTION
POSSIBLE PROBLEMS

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

NO

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1792 is faulty.

5.

6.

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Is continuity present from
connector PX4 pin 4 to
terminal lug TL150?

FUEL gage OK.

Faulty front brake air pressure
transmitter.
Faulty FRONT BRAKE AIR
pressure gage.
Faulty dashboard cable
assembly.

FUEL gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty FRONT BRAKE AIR
pressure gage.
Faulty front brake air pressure
transmitter.

Is continuity present from
front brake air pressure
transmitter housing to
ground?

Clean mounting surfaces of dashboard and
air pressure transmitters mounting bracket,
if needed. Tighten front brake air pressure
transmitter, all fittings, and hardware to
ensure a good ground.

Replace wire 1792 from connector PX4 pin
4 to terminal lug TL150 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-324.6 Change 1

CONTINUITY TEST

NOTE

CONTINUITY TEST

(10) Connect connector PX4 to FRONT BRAKE
AIR pressure gage connector.
(11) Connect connector clamp to FRONT BRAKE
AIR pressure gage.

Install plastic cable ties as required

(12) Install instrument panel assembly
(para 7-15).

NOTE

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to front brake air pressure transmitter
housing.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, perform steps
(5) through (12).
(5) Remove self-locking nut, air pressure
transmitters mounting bracket, screw, and
bracket from dashboard. Discard
self-locking nut.
(6) Inspect dashboard and air pressure
transmitters mounting bracket for
corrosion.
(7) If mounting surface is corroded or fittings
and hardware are not tight, clean mounting
surface if needed. Tighten front brake air
pressure transmitter, all fittings, and
hardware to ensure a good ground.
(8) Position bracket, screw, air pressure
transmitters mounting bracket, and
self-locking nut on dashboard.
(9) Tighten self-locking nut to 168-192 lb-in.
(19-21 N.m).

Remove plastic cable ties as required.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX4 pin 4.
(3) Connect negative (-) probe of multimeter to
terminal lug TL150 and note reading on
multimeter.
(4) If continuity is not present, replace wire
1792 from connector PX4 pin 4 to
terminal lug TL150 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-324.7

TM 9-2320-365-20-1

CONTINUITY TEST (Cont)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

7.

NO

YES

Operational Test
FUEL gage OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty FRONT BRAKE AIR
pressure gage.
Faulty rear brake air pressure
transmitter.

Does FRONT BRAKE AIR
pressure gage operate with
a known good front brake
air pressure transmitter?

If FRONT BRAKE AIR pressure
gage does not operate, FRONT
BRAKE AIR pressure gage is
faulty. If REAR BRAKE AIR
pressure gage does operate,
front brake air pressure
transmitter is faulty.

Replace FRONT BRAKE AIR
pressure gage (para 7-14).

e10. FRONT BRAKE AIR PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

Replace front brake air pressure
transmitter (para 7-36).

TM 9-2320-365-20-1

2-324.8 Change 1

CONTINUITY TEST

(1) Connect connector PX4 to FRONT BRAKE
AIR pressure gage connector.
(2) Connect connector clamp to FRONT BRAKE
AIR pressure gage.
(3) Install instrument panel assembly
(para 7-15).
(4) Replace front brake air pressure transmitter
(para 7-36).
(5) Start engine (TM 9-2320-365-10).
(6) Allow vehicle to build air pressure.
(7) Note reading on FRONT BRAKE AIR
pressure gage.
(8) If FRONT BRAKE AIR pressure gage does
not operate, replace FRONT BRAKE AIR
pressure gage (para 7-14).
(9) If FRONT BRAKE AIR pressure gage does
operate, replace front brake air pressure
transmitter (para 7-36).
(10) Shut down engine (TM 9-2320-365-10).

Change 1 2-325

TM 9-2320-365-20-1

e11. ENGINE OIL PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE

KNOWN INFO

VOLTS gage OK.
Engine oil level OK.
ENGINE OIL PRESSURE indicator
goes out after engine starts.

POSSIBLE PROBLEMS

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

1.

NO

YES

Is 24 VDC present at
connector PX6 pin 3?

Faulty engine oil pressure
transmitter.
Faulty engine OIL PRESS gage.
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard cable
assembly.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

START

If 24 VDC is not present, wire
1546 from connector PX6 pin 3
to connector PX10 pin 3 is
faulty.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Repair wire 1546 from connector PX6 pin 3 to
connector PX10 pin 3 (para 2-40) or replace WTEC
II dashboard cable assembly (para 7-10) or WTEC
III dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-326 Change 2

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector clamp from engine OIL
PRESS gage connector.
(3) Disconnect connector PX6 from engine OIL
PRESS gage connector.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector PX6 pin 3.
(6) Connect negative (-) probe of multimeter to
known good ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, repair wire 1546
from connector PX6 pin 3 to connector PX10
pin 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC
III dashboard cable assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 2 2-327

KNOWN INFO

POSSIBLE PROBLEMS

2.
TEST OPTIONS

Resistance Test or
STE/ICE-R #91

REASON FOR QUESTION

NO

YES

Go to step 4 of this fault.

This question eliminates
possible problems and
determines where
troubleshooting continues.

3.
KNOWN INFO
TEST OPTIONS

Resistance Test or
STE/ICE-R #91

REASON FOR QUESTION

NO

YES

Replace OIL PRESS gage (para 7-14).

Faulty engine oil pressure
transmitter.
Faulty engine OIL PRESS gage.
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard cable
assembly.

VOLTS gage OK.
Engine oil level OK.
Engine oil pressure indicator
goes out after engine starts.

VOLTS gage OK.
Engine oil level OK.
Engine oil pressure indicator
goes out after engine starts.
Engine control cable assembly
OK.
WTEC II dashboard cable
assembly OK.
WTEC III dashboard cable
assembly OK.
POSSIBLE PROBLEMS
Faulty engine oil pressure
transmitter.
Faulty engine OIL PRESS gage.

Is 202-243 ohms resistance
present from connector PX6
pin 4 to a known good
ground?

Is 90-130 ohms resistance
present from connector PX6
pin 4 to a known good
ground?

e11. ENGINE OIL PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

If 90-130 ohms resistance
is not present, engine oil
pressure transmitter is faulty.
If 90-130 ohms of resistance is
present, engine OIL PRESS gage
is faulty.

Replace oil pressure transmitter
(para 7-41).

2-328 Change 2

TM 9-2320-365-20-1

RESISTANCE TEST

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX6 pin 4.
(3) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(4) If 202-243 ohms resistance is not
present, go to step 4 of this fault.

(1) Start engine (TM 9-2320-365-10).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX6 pin 4.
(4) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(5) If 90-130 ohms resistance is not present,
replace engine oil pressure transmitter
(para 7-41).
(6) If 90-130 ohms resistance is present,
replace engine OIL PRESS gage (para 7-14).
(7) Shut down engine (TM 9-2320-365-10).
(8) Connect connector PX6 to engine OIL PRESS
gage connector.
(9) Connect connector clamp to engine OIL PRESS
gage connector.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1

Change 2 2-328.1

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Resistance Test or
STE/ICE-R #91

REASON FOR QUESTION

NO

YES

VOLTS gage OK.
Engine oil level OK.
Engine oil pressure indicator
goes out after engine starts.

Faulty engine oil pressure
transmitter.
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard cable
assembly.

4.

Is 202-243 ohms resistance
present from engine oil
pressure transmitter
connector pin 2 to a known
good ground?

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

5.

Is continuity present from
connector J31 pin 11 to
connector PX6 pin 4?

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard cable
assembly.

VOLTS gage OK.
Engine oil level OK.
Engine oil pressure indicator
goes out after engine starts.
Engine oil pressure transmitter
OK.

Continuity Test or
STE/ICE-R Test #91

e11. ENGINE OIL PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

If continuity is not present, wire
36 from connector J31 pin 11 to
connector PX6 pin 4 is faulty.

If 202-243 ohms resistance is
not present, engine oil pressure
transmitter is faulty.

Repair wire 36 from connector J31 pin 11 to
connector PX6 pin 4 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace engine oil pressure
transmitter (para 7-41).

YES

TM 9-2320-365-20-1

2-328.2 Change 2

RESISTANCE TEST

NOTE

(1) Raise cab (TM 9-2320-365-10)
(2) Set multimeter to ohms.
(3) Disconnect connector P32 from engine oil
pressure transmitter connector.
(4) Connect positive (+) probe of multimeter to
engine oil pressure transmitter pin 2.
(5) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(6) If 202-243 ohms resistance is not present,
replace engine oil pressure transmitter
(para 7-41).

Perform steps (7) through (9) if 202-243
ohms resistance is not present.
(7) Connect connector PX6 to engine OIL PRESS
gage connector.
(8) Connect connector clamp to engine OIL
PRESS gage connector.
(9) Install instrument panel assembly (para 7-15).

(1) Connect connector P32 to engine oil pressure
transmitter connector.
(2) Lower cab (TM 9-2320-365-10).
(3) Disconnect connector J31 from connector P31.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX6 pin 4.
(6) Connect negative (-) probe of multimeter to
connector J31 pin 11 and note reading on
multimeter.
(7) If continuity is not present, repair wire 36 from
connector PX6 pin 4 to connector J31 pin 11
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

CONTINUITY TEST

TM 9-2320-365-20-1

Change 2 2-329

e11. ENGINE OIL PRESSURE GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard cable
assembly.

VOLTS gage OK.
Engine oil level OK.
Engine oil pressure indicator
goes out after engine starts.
Engine oil pressure transmitter
OK.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector PX6 pin 4 to a
known good ground?

6.

If continuity is not present, wire
36 from connector P31 socket
11 to connector P32 socket 2 is
faulty. If continuity is present,
wire 36 from connector J31 pin
11 to connector PX6 pin 4 is
faulty.

YES

NO

Repair wire 36 from connector J31 pin 11 to
connector PX6 pin 4 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 36 from connector P31 socket
11 to connector P32 socket 2 (para 2-40) or
engine control cable assembly (para 7-72).

TM 9-2320-365-20-1

2-330 Change 2

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX6 pin 4.
(3) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(4) If continuity is not present, repair wire 36 from
connector P31 socket 11 to connector P32
socket 2 (para 2-40) or engine control cable
assembly (para 7-72).
(5) If continuity is present, repair wire 36 from
connector J31 pin 11 to connector PX6 pin 4
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(6) Connect connector J31 to connector P31.
(7) Connect connector PX6 to engine OIL PRESS
gage connector.
(8) Connect connector clamp to engine OIL PRESS
gage connector.
(9) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1

Change 2 2-331

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE

START

1.
TEST OPTIONS
Transmission Diagnostic Code
Check

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS
Is main code 13, 22 or 25
active in pushbutton shift
selector?

YES
Go to step 2 of this fault.

NO

Perform transmission troubleshooting f19 or
f37 for main code 13, transmission troubleshooting
f2, f3, f4, f22, f23, or f24 for main code 22, or
transmission troubleshooting f14 or f32 for
main code 25.

Water temperature gage
operates correctly.

Main code 13, 22, or 25 active
in pushbutton shift selector.
Faulty dashboard cable
assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty Central Tire Inflation
System (CTIS) cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

Materials/Parts
Nut, Self-Locking (2) (Item 125, Appendix G)

Personnel Required
(2)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-332 Change 1

(1) Check for active transmission diagnostic codes
(para 8-4 or 8-5).
(2) If main code 13 is active in pushbutton shift
selector, perform transmission troubleshooting
f19 or f37.
(3) If main code 22 is active in pushbutton shift
selector, perform transmission troubleshooting
f2, f3, f4, f22, f23, or f24.
(4) If main code 25 is active in pushbutton shift
selector, perform transmission troubleshooting
f14 or f32.

Change 1 2-333

TM 9-2320-365-20-1

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

KNOWN INFO
2.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
Is 24 VDC present at
connector PX8 pin 3?
If 24 VDC is not present, wire
1546 is faulty.

Water Temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Repair wire 1546 from connector PX11 pin 3
to connector PX8 pin 3 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-334 Change 1

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from
speedometer connector.
(3) Disconnect connector PX8 from
speedometer connector.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector PX8 pin 3.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on (TM 9-
2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, repair wire 1546
from connector PX11 pin 3 to connector
PX8 pin 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(9) Position master power switch to off (TM 9-
2320-365-10).

Change 1 2-335

TM 9-2320-365-20-1

TEST OPTIONS

Visual Check

REASON FOR QUESTION

3.

YES

NO

KNOWN INFO

Does VOLTS gage operate
correctly?
If VOLTS gage does not
operate, wire 3020 from
connector PX8 pin 1 to
connector PX10 pin 1 is faulty.

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

4.

Is vehicle equipped with
WTEC II transmission
controls?

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

NO

Go to step 12 of this fault.
YES

Repair wire 3020 from connector PX8 pin 1
to connector PX10 pin 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-336 Change 1

(1) Check if vehicle is equipped with WTEC II
Transmission ECU Pushbutton Shift Selector
(TEPSS).
(2) If pushbutton shift selector is not mounted
with four screws and is not equipped with a
filter cover, go to step 12 of this fault.

(1) Position master power switch to on (TM 9-
2320-365-10).
(2) Observe if VOLTS gage indicator needle
moves (TM 9-2320-365-10).
(3) If VOLTS gage indicator needle does not
move, repair wire 3020 from connector PX8
pin 1 to connector PX10 pin 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(4) Position master power switch to off (TM 9-
2320-365-10).

Change 1 2-337

TM 9-2320-365-20-1

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.

POSSIBLE PROBLEMS

6.

Is continuity absent from
connector PX33 socket H2
to ground?

YES

NO

YES

NO
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

If continuity is not present
from connector PX33 socket
H2 to connector PX8 pin 4,
wire 1793 is faulty.

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS
5.

Is continuity present from
connector PX33 socket H2
to connector PX8 pin 4?

CAUTION
Read CAUTION
on following page.

Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

POSSIBLE PROBLEMS

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.

KNOWN INFO

If continuity is present, wire
1793 from connector PX33
socket H2 to connector PX8
pin 4 or wire 1793 from
connector J111 socket B to
connector PX8 pin 4 is faulty.

CAUTION
Read CAUTION
on following page.

Repair wire 1793 from connector
PX33 socket H2 to connector PX8
pin 4 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10).

Repair wire 1793 from connector PX33
socket H2 to connector PX8 pin 4 or
wire 1793 from connector J111 socket B
to connector PX8 pin 4 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10).

TM 9-2320-365-20-1

2-338 Change 1

CONTINUITY TEST

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

(1) Remove kick panel (para 16-3).
(2) Loosen screw in connector PX33.
(3) Disconnect connector PX33 from WTEC II
VIM.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX33 socket H2.
(6) Connect negative (-) probe of multimeter to
connector PX8 pin 4 and note reading
on multimeter.
(7) If continuity is not present, repair wire 1793
from connector PX33 socket H2 to
connector PX8 pin 4 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10).

(1) Remove PDP cover (TM 9-2320-365-10).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector P111 from
connector J111.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to connector PX33 socket H2.
(8) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(9) If continuity is present, remove plastic
cable ties as required and perform visual
inspection of wire 1793 from connector
PX33 socket H2 to connector PX8 pin 4
and wire 1793 from connector PX8 pin 4
to connector J111 socket B to determine
which wire is faulty. Repair wire 1793
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).
(10) Connect connector PX33 to WTEC II VIM.
(11) Tighten screw in connector PX33.

Change 1 2-339

TM 9-2320-365-20-1

(12) Install kick panel (para 16-3).

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.
WTEC II dashboard cable
assembly OK.

7.

Is continuity present from
WTEC II VIM connector pin
H2 to WTEC II VIM
connector pin M2?

If continuity is not present,
WTEC II VIM is faulty.

YES

NO

Replace WTEC II VIM
(para 8-6).

8.

Is continuity present from
connector J116 socket B2
to connector J115 socket
23 and continuity absent
from connector J116 socket
B2 to ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

YES

NO

KNOWN INFO

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.
WTEC II dashboard cable
assembly OK.
WTEC II VIM OK.

POSSIBLE PROBLEMS

Faulty WTEC II VIM.
Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

Faulty WTEC II cab
transmission harness.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

CAUTION
Read CAUTION
on following page.

CAUTION
Read CAUTION
on following page.

Replace WTEC II cab transmission
harness (para 7-86).

TM 9-2320-365-20-1

2-340 Change 1

If continuity is not present
from connector J116 socket
B2 to connector J115 socket
23 or continuity is present
from connector J116 socket
B2 to ground, WTEC II cab
transmission harness is
faulty.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

CONTINUITY TEST

(1) Loosen screw in connector J116.
(2) Disconnect connector J116 from WTEC II
VIM.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
WTEC II VIM connector pin H2.
(5) Connect negative (-) probe of multimeter to
WTEC II VIM connector pin M2 and note
reading on multimeter.
(6) If continuity is not present, replace WTEC II
VIM (para 8-6).
(7) Connect connector PX33 to WTEC II VIM.
(8) Tighten screw in connector PX33.

Change 1 2-341

TM 9-2320-365-20-1

(1) Disconnect connector J115 from WTEC II
TEPSS.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector J116 socket B2.
(4) Connect negative (-) probe of mulitmeter
to connector J115 socket 23 and note
reading on multimeter.
(5) If continuity is not present, replace
WTEC II cab transmission harness
(par 7-86).
(6) Connect positive (+) probe of multimeter
to connector J116 socket B2.
(7) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(8) If continuity is present, replace WTEC II
cab transmission harness (para 7-86).
(9) Connect connector J115 to WTEC II
TEPSS.
(10) Connect connector J116 to WTEC II VIM.
(11) Tighten screw in connector J116.

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO
9.

POSSIBLE PROBLEMS

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.
WTEC II dashboard cable
assembly OK.
WTEC II VIM OK.
WTEC II cab transmission
harness OK.

Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

Is continuity absent from
connector P110 socket U to
ground?
If continuity is present, wire
1793 in CTIS cable assembly
is faulty.

NO

YES

KNOWN INFO

POSSIBLE PROBLEMS

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.
WTEC II dashboard cable
assembly OK.
WTEC II VIM OK.
WTEC II cab transmission
harness OK.
CTIS cable assembly OK.

Faulty CTIS ECU.
Faulty speedometer.

10.

YES

NO

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Replace CTIS ECU
(para 12-6).

Is continuity absent from
CTIS ECU connector pin U
to ground?
If continuity is present from
CTIS ECU connector pin U to
ground, CTIS ECU is faulty.

CAUTION
Read CAUTION
on following page.

Repair wire 1793 from connector
P110 socket U to connector P111
socket B (para 2-40) or replace
CTIS cable assembly (para 7-53).

TM 9-2320-365-20-1

2-342 Change 1

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
CTIS ECU connector pin U.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is present, replace CTIS ECU
(para 12-6).
(5) Connect connector P110 to CTIS ECU.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Disconnect connector P110 from CTIS ECU.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P110 socket U.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is present, repair wire 1793
from connector P110 socket U to connector
P111 socket B (para 2-40) or replace CTIS
cable assembly (para 7-53).

Change 1 2-343

TM 9-2320-365-20-1

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

NO

KNOWN INFO
11.

Are speedometer dip switch
settings correct?

Visual Inspection

REASON FOR QUESTION

If speedometer dip switch
settings are correct and
speedometer does not operate
or is inaccurate, speedometer
is faulty.

POSSIBLE PROBLEMS

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC II transmission
controls.
WTEC II dashboard cable
assembly OK.
WTEC II VIM OK.
WTEC II cab transmission
harness OK.
CTIS cable assembly OK.
CTIS ECU OK.

Faulty speedometer.

YES
Correct speedometer dip switch
settings (para 7-14).

Replace speedometer
(para 7-14).

TM 9-2320-365-20-1

2-344 Change 1

(11) Connect connector P111 to connector
J111.
(12) Install PDP on dashboard with three
washers and screws.
(13) Install three screws in PDP.
(14) Install PDP cover (TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-344.1

(1) Remove two protective caps, self-locking
nuts, retaining ring, and speedometer from
instrument panel assembly. Discard self-
locking nuts.
(2) Note position of speedometer dip
switches. Refer to Table 2-8.4.
Speedometer Dip Switch Settings.
(3) If speedometer dip switch setting(s) are
incorrect, correct speedometer dip switch
setting(s) (para 7-14).
(4) If speedometer dip switch settings are
correct, replace speedometer (para 7-14).
(5) Position speedometer in instrument panel
assembly with retaining ring and two self-
locking nuts.
(6) Tighten two self-locking nuts to 9 lb-in.
(1 N·m).
(7) Install two protective caps on
speedometer.
(8) Connect connector PX8 to speedometer
connector.
(9) Connect connector clamp on speedometer
connector.
(10) Install instrument panel assembly (para
7-10).

2
1

3
4
5
6
7
8
9
10
Up

Up

Up
Up

Up
Up

Down

Down
Down

Down

Switch Number
Switch Setting

Table 2-8.4. Speedometer Dip Switch Settings

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

YES

NO

YES

NO

Is continuity absent from
connector P116 socket 30
to ground?

13.

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC III transmission
controls.

Faulty WTEC III dashboard
cable assembly.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present
from connector P116 socket
30 to connector PX8 pin 4,
wire 157 is faulty.

12.

Is continuity present from
connector P116 socket 30
to connector PX8 pin 4?

CAUTION
Read CAUTION
on following page.
KNOWN INFO

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC III transmission
controls.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

CAUTION
Read CAUTION
on following page.

If continuity is present, wire
157 from connector P116
socket 30 to connector PX8
pin 4 or wire 1793 from
connector PX8 pin 4 to
connector J111 socket B is
faulty.

Repair wire 157 from connector
P116 socket 30 to connector PX8
pin 4 (para 2-40) or replace WTEC III
dashboard cable assembly (para 7-11).

Repair wire 157 from connector P116
socket 30 to connector PX8 pin 4 or
wire 1793 from connector PX8 pin 4
to connector J111 socket B (para 2-40)
or replace WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-344.2 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CONTINUITY TEST

CONTINUITY TEST

(11) Connect connector clamp on connector
P116.
(12) Install kick panel (para 16-3).

(1) Remove kick panel (para 16-3).
(2) Disconnect connector clamp from connector
P116.
(3) Disconnect connector P116 from WTEC III
transmission ECU.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector P116 socket 30.
(6) Connect negative (-) probe of multimeter to
connector PX8 pin 4 and note reading
on multimeter.
(7) If continuity is not present, repair wire 157
from connector P116 socket 30 to
connector PX8 pin 4 (para 2-40) or replace
WTEC III dashboard cable assembly (para
7-11).

(1) Remove PDP cover (TM 9-2320-365-10).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector P111 from
connector J111.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to connector P116 socket 30.
(8) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(9) If continuity is present, remove plastic
cable ties as required and perform visual
inspection of wire 157 from connector
P116 socket 30 to connector PX8 pin 4
and wire 1793 from connector PX8 pin 4
to connector J111 socket B to determine
which wire is faulty. Repair wire 157 or
1793 (para 2-40) or replace WTEC III
dashboard cable assembly (para 7-11).
(10) Connect connector P116 to WTEC III
transmission ECU.

Change 1 2-344.3

TM 9-2320-365-20-1

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Is continuity absent from
connector P110 socket U to
ground?
If continuity is present, wire
1793 in CTIS cable assembly
is faulty.

NO

YES

KNOWN INFO

YES

NO

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Replace CTIS ECU
(para 12-6).

Is continuity absent from
CTIS ECU connector pin U
to ground?
If continuity is present from
CTIS ECU connector pin U to
ground, CTIS ECU is faulty.

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC III transmission
controls.
WTEC III dashboard cable
assembly OK.

POSSIBLE PROBLEMS
Faulty CTIS cable assembly.
Faulty CTIS ECU.
Faulty speedometer.

14.

15.

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC III transmission
controls.
WTEC III dashboard cable
assembly OK.
CTIS cable assembly OK.

POSSIBLE PROBLEMS
Faulty CTIS ECU.
Faulty speedometer.

CAUTION
Read CAUTION
on following page.

Repair wire 1793 from connector
P110 socket U to connector P111
socket B (para 2-40) or replace
CTIS cable assembly (para 7-53).

TM 9-2320-365-20-1

2-344.4 Change 1

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
CTIS ECU connector pin U.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is present, replace CTIS ECU
(para 12-6).
(5) Connect connector P110 to CTIS ECU.

(1) Disconnect connector P110 from CTIS ECU.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P110 socket U.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is present, repair wire 1793
from connector P110 socket U to connector
P111 socket B (para 2-40) or replace CTIS
cable assembly (para 7-53).

Change 1 2-344.5

TM 9-2320-365-20-1

e12. SPEEDOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

NO

KNOWN INFO

Are speedometer dip switch
settings correct?

Visual Inspection

REASON FOR QUESTION

If speedometer dip switch
settings are correct and
speedometer does not operate
or is inaccurate, speedometer
is faulty.

YES
Correct speedometer dip switch
settings (para 7-14).

Replace speedometer
(para 7-14).

Water temperature gage
operates correctly.
Main code 13, 22, or 25 not
active in pushbutton shift
selector.
VOLTS gage operates
correctly.
Vehicle is equipped with
WTEC III transmission
controls.
WTEC III dashboard cable
assembly OK.
CTIS cable assembly OK.
CTIS ECU OK.

POSSIBLE PROBLEMS
Faulty speedometer.

16.

TM 9-2320-365-20-1

2-344.6 Change 1

J111.
(12) Install PDP on dashboard with three
washers and screws.
(13) Install three screws in PDP.
(14) Install PDP cover (TM 9-2320-365-10).

Change 1 2-345

TM 9-2320-365-20-1

(1) Remove two protective caps, self-locking
nuts, retaining ring, and speedometer from
instrument panel assembly. Discard self-
locking nuts.
(2) Note position of speedometer dip
switches. Refer to Table 2-8.5.
Speedometer Dip Switch Settings.
(3) If speedometer dip switch setting(s) are
incorrect, correct speedometer dip switch
setting(s) (para 7-14).
(4) If speedometer dip switch settings are
correct, replace speedometer (para 7-14).
(5) Position speedometer in instrument panel
assembly with retaining ring and two self-
locking nuts.
(6) Tighten two self-locking nuts to 9 lb-in.
(1 N·m).
(7) Install two protective caps on
speedometer.
(8) Connect connector PX8 to speedometer
connector.
(9) Connect connector clamp on speedometer
connector.
(10) Install instrument panel assembly (para
7-10).

Up
Up

Up
Up

Up

Up

Down

Down
Down

Down

1
2
3
4
5
6
7

9
8

10

Switch Number
Switch Setting

Table 2-8.5. Speedometer Dip Switch Settings

(11) Connect connector P111 to connector

e13. VOLTS GAGE DOES NOT OPERATE OR IS INACCURATE

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

Is 24 VDC present on
connector PX10 pin 3?

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.

Go to step 3 of this fault.

NO

YES

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO
Circuit breaker CB77 OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty VOLTS gage.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-346 Change 1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB77 prior to beginning
this task.

VOLTAGE TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from VOLTS
gage connector.
(3) Disconnect connector PX10 from VOLTS
gage connector.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector PX10 pin 3.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on (TM 9-
2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 3 of
this task.
(9) Position master power switch to off (TM 9-
2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 1 2-346.1

TM 9-2320-365-20-1

e13. VOLTS GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

2.

Is continuity present from
connector PX10 socket 1 to
a known good ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 3004 from connector
PX10 socket 1 to terminal
board TB2 position 9 is faulty.

KNOWN INFO
Circuit breaker CB77 OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty VOLTS gage.

CAUTION
Read CAUTION
on following page.

NO

YES

Replace VOLTS gage (para 7-14).

Repair wire 3004 from connector PX10
socket 1 to terminal board TB2 position 9
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-346.2 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX10 socket 1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3004
from connector PX10 socket 1 to terminal
board TB2 position 9 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
para 7-11).
(5) If continuity is present, replace VOLTS gage
(para 7-14).
(6) Connect connector PX10 to VOLTS gage
connector.
(7) Connect connector clamp on VOLTS gage
connector.
(8) Install instrument panel assembly (para
7-15).

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-346.3

TM 9-2320-365-20-1

e13. VOLTS GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

3.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO

POSSIBLE PROBLEMS

Circuit breaker CB77 OK.
VOLTS gage OK.

Faulty dashboard cable
assembly.

YES

NO

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 24 VDC present at
connector J913 socket 9?

Go to step 4 of this fault.

Repair wire 1546 from connector J913
socket 9 to connector PX10 pin 3 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-346.4 Change 1

VOLTAGE TEST

(12) Connect connector P913 to connector
J913, if required.
(13) Install personnel heater assembly (para
18-9).
(14) Install instrument panel assembly (para
7-15).

(1) Remove personnel heater for access (para
18-9).
(2) Disconnect connector P913 from
connector J913, if required.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to connector J913 socket 9.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on (TM 9-
2320-365-10) and not reading on
multimeter.
(7) If 24 VDC is not present, go to step 4 of
this fault.
(8) If 24 VDC is present, repair wire 1546
from connector J913 socket 9 to
connector PX10 pin 3 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector PX10 to VOLTS gage
connector.
(11) Connect connector clamp on VOLTS gage
connector.

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-346.5

TM 9-2320-365-20-1

e13. VOLTS GAGE DOES NOT OPERATE OR IS INACCURATE (CONT)

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Circuit breaker CB77 OK.
VOLTS gage OK.

Faulty dashboard cable
assembly.

YES

4.

WARNING
Read WARNING
on following page.

NO

If 24 VDC is not present, wire
1929 is faulty. If 24 VDC is
present, wire 1546 is faulty.

Is 24 VDC present at
terminal board TB1
position 64?

Repair wire 1929 from circuit breaker
CB77 socket 5 to terminal board TB1
position 64 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

Repair wire 1546 from terminal board TB1
position 61 to connector J913 pin 9 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-346.6 Change 1

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Remove PDP cover (TM 9-2320-365-10).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to terminal board TB1 position 64.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on (TM 9-
2320-365-10) and note reading on
multimeter.
(9) If 24 VDC is not present, repair wire 1929
from circuit breaker CB77 socket 5 to
terminal board TB1 position 64 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

from terminal board TB1 position 61 to
connector J913 socket 9 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(12) Position master power switch to off (TM 9-
2320-365-10).
(13) Install PDP on dashboard with three
screws.
(14) Install three washers and screws in PDP.

Change 1 2-347

TM 9-2320-365-20-1

(10) If 24 VDC is present, repair wire 1546

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE

NOTE

If tachometer does not illuminate, perform
Electrical System Troubleshooting e21.
Tachometer Does Not Illuminate prior to
beginning this task.

1.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

CAUTION
Read CAUTION
on following page.

If resistance is greater than
1440 ohms, engine speed
sensor is faulty.

Resistance Test or
STE/ICE-R Test #91

Is less than 1440 ohms
resistance present from
engine speed sensor
connector socket 1 to
pin 2?

KNOWN INFO

Faulty engine speed sensor.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.

START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

Replace engine speed sensor
(para 7-38).

TM 9-2320-365-20-1

2-348 Change 1

CONTINUITY TEST

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector clamp from engine
speed sensor connector.
(3) Disconnect connector P38 from engine
speed sensor connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
socket 1 of engine speed sensor
connector.
(6) Connect negative (-) probe of multimeter to
pin 2 of engine speed sensor connector and
note reading on multimeter.
(7) If greater than 1440 ohms resistance is
present, replace engine speed sensor (para
7-38).

CAUTION

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Change 1 2-349

TM 9-2320-365-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

2.
KNOWN INFO
TEST OPTIONS

Is engine speed sensor free
from damage?

Visual Inspection

REASON FOR QUESTION
A damaged engine speed
sensor will cause
tachometer to malfunction.

NO

YES

3.

Does tachometer operate
correctly after performing
step 2?

YES

Fault corrected.

NO

Go to step 4 of this fault.

TEST OPTIONS

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

STE/ICE-R Test #10

Faulty engine speed sensor.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK
electrically.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

Replace engine speed sensor
(para 7-38).

TM 9-2320-365-20-1

2-350 Change 1

(1) Remove engine speed sensor (para 7-38).
(2) Observe lower end of engine speed sensor
for damage caused by contact with engine
ring gear.
(3) If engine speed sensor is damaged, replace
engine speed sensor (para 7-38).
(4) Install engine speed sensor (para 7-38).
(5) Adjust engine speed sensor (para 7-38).

(1) Perform STE/ICE-R test #10.
(2) Position PTO switch to on (TM 9-2320-365-
10).
(3) Observe if STE/ICE-R test #10 results and
tachometer reading are in agreement.
(4) Position PTO switch to off (TM 9-2320-365-
10).
(5) Shut down engine (TM 9-2320-365-10).
(6) If STE/ICE-R test #10 and tachometer
reading are not in agreement, go to step 4
of this fault.

Change 1 2-351

TM 9-2320-365-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

4.

Is 24 VDC present on
connector P901 pin 3?

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

YES

NO

If 24 VDC is not present, wire
1546 is faulty.

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

Repair wire 1546 from connector
P913 pin 9 to connector P901
pin 3 (para 2-40) or replace auxiliary
panel cable assembly (para 7-49).

TM 9-2320-365-20-1

2-352 Change 1

VOLTAGE TEST

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.
(3) Disconnect connector clamp from
tachometer connector.
(4) Disconnect connector P901 from
tachometer connector.
(5) Set multimeter to VDC.
(6) Connect positive (+) probe of multimeter
to connector P901 pin 3.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position master power switch to on (TM 9-
2320-365-10) and note reading on
multimeter.
(9) If 24 VDC is not present, repair wire 1546
from connector P913 pin 9 to connector
P901 pin 3 (para 2-40) or replace auxiliary
panel cable assembly (para 7-49).
(10) Position master power switch to off (TM 9-
2320-365-10).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-353

TM 9-2320-365-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

5.

Is continuity present from
connector P901 pin 4 to
connector P38 pin 1?

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

NO

YES

6.

Is continuity present from
connector P38 socket 2 to
a known good ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Replace tachometer
(para 7-21).

YES

NO

If continuity is present,
tachometer is faulty.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
Auxiliary panel cable assembly
OK.

Go to step 7 of this fault.

Go to step 10 of this fault.

TM 9-2320-365-20-1

2-354 Change 1

CONTINUITY TEST

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector P38 socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 10
of this fault.
(5) If continuity is present, replace tachometer
(para 7-21).
(6) Connect connector P38 to engine speed
sensor connector.
(7) Connect connector clamp on engine speed
sensor connector.
(8) Lower cab (TM 9-2320-365-10).
(9) Connect connector P901 to tachometer
connector.
(10) Connect connector clamp on tachometer
connector.
(11) Position auxiliary panel on auxiliary
panel housing with six screws.
(12) Tighten six screws to 18 lb-in. (2 N·m).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector P901 pin 4.
(3) Raise cab (TM 9-2320-365-10).
(4) Disconnect connector clamp from engine
speed sensor connector.
(5) Disconnect connector P38 from engine
speed sensor connector.
(7) Connect negative (-) probe of multimeter
to connector P38 pin 1 and note reading on
multimeter.
(8) If continuity is not present, go to step 7 of
this fault.

Change 1 2-355

TM 9-2320-365-20-1

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

NO

YES

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

Is continuity present from
connector P901 pin 4 to
connector J31 pin 8?

7.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

Repair wire 1444 from connector P31
socket 8 to connector P38 pin 1 (para
2-40) or replace engine control cable
assembly (para 7-72).

Go to step 8 of this fault.

TM 9-2320-365-20-1

2-356 Change 1

CONTINUITY TEST

NOTE
Perform steps (13) through (16) if
continuity is present.

(13) Connect connector P901 to tachometer
connector.
(14) Connect connector clamp on tachometer
connector.
(15) Position auxiliary panel on auxiliary panel
housing with six screws.
(16) Tighten six screws to 18 lb-in. (2 N·m).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

(1) Connect connector P38 to engine speed
sensor connector.
(2) Connect connector clamp on engine speed
sensor connector.
(3) Lower cab (TM 9-2320-365-10).
(4) Remove instrument panel assembly for
access (para 7-15).
(5) Disconnect connector P31 from connector
J31.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to connector P901 pin 4.
(8) Connect negative (-) probe of multimeter
to connector J31 pin 8 and note reading
on multimeter.
(9) If continuity is not present, go to step 8 of
this fault.
(10) If continuity is present, repair wire 1444
from connector P31 socket 8 to connector
P38 pin 1 (para 2-40) or replace engine
control cable assembly (para 7-72).
(11) Connect connector P31 to connector J31.
(12) Install instrument panel assembly (para
7-15).

Change 1 2-356.1

TM 9-2320-365-20-1

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

NO

YES

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

Is continuity present from
connector P901 pin 4 to
connector PX26 socket 1?

8.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

TM 9-2320-365-20-1

Repair wire 1444 from connector PX26
socket 1 to connector J31 pin 8 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

2-356.2 Change 1

Go to step 9 of this fault.

CONTINUITY TEST

NOTE
Perform steps (8) through (11) if
continuity is present.

(8) Connect connector P901 to tachometer
connector.
(9) Connect connector clamp on tachometer
connector.
(10) Position auxiliary panel on auxiliary panel
housing with six screws.
(11) Tighten six screws to 18 lb-in. (2 N·m).

TM 9-2320-365-20-1

Change 1 2-356.3

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector PX26 from
frequency ECU connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P901 pin 4.
(4) Connect negative (-) probe of multimeter
to connector PX26 socket 1 and note
reading on multimeter.
(5) If continuity is not present, go to step 9 of
this fault.
(6) If continuity is present, repair wire 1444
from connector PX26 socket 1 to
connector J31 pin 8 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para7-11).
(7) Connect connector PX26 to frequency
ECU connector.

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

If continuity is not present,
wire 1550 in auxiliary panel
cable assembly is faulty. If
continuity is present, wire
1550 in dashboard cable
assembly is faulty.

YES

NO

9.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
Is continuity present from
connector P901 pin 4 to
connector P913 pin 12?

Repair wire 1550 from connector P901
pin 4 to connector P913 pin 12 (para
2-40) or replace auxiliary panel cable
assembly (para 7-49).

Repair wire 1550 from connector J913
socket 12 to connector PX26 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-356.4 Change 1

CONTINUITY TEST

(1) Remove personnel heater assembly for
access (para 18-9).
(2) Disconnect connector P913 from
connector J913.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector P901 pin 4.
(5) Connect negative (-) probe of multimeter
to connector P913 pin 12 and note reading
on multimeter.
(6) If continuity is not present, repair wire 1550
from connector P901 pin 4 to connector
P913 pin 12 (para 2-40) or replace auxiliary
panel cable assembly (para 7-49).
(7) If continuity is present, repair wire 1550
from connector J913 socket 12 to
connector PX26 socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Connect connector P913 to connector
J913.
(9) Install personnel heater assembly (para
18-9).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-356.5

TM 9-2320-366-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Is continuity present from
connector J31 pin 16 to a
known good ground?

NO

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Is continuity present from
connector PX26 socket 6 to
a known good ground?

NO

YES

If continuity is not present,
wire 3083 is faulty.

YES

10.

11.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

Repair wire 3083 from connector P38
socket 2 to connector P31 socket 16
(para 2-40) or replace engine control
cable assembly (para 7-72).

Repair wire 3083 from connector PX26
socket 6 to terminal board TB2 position 26
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Go to step 11 of this fault.

TM 9-2320-365-20-1

2-356.6 Change 1

(1) Disconnect connector PX26 from frequency
ECU connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX26 socket 6.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3083
from connector PX26 socket 6 to terminal
board TB2 position 26 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

CONTINUITY TEST

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector P31 from connector
J31.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J31 pin 16.
(5) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(6) If continuity is not present, go to step 11 of
this fault.
(7) If continuity is present, repair wire 3083
from connector P38 socket 2 to connector
P31 socket 16 (para 2-40) or replace engine
control cable assembly (para 7-72).
(8) Connect connector P31 to connector J31.
(9) Install instrument panel assembly (para
7-15).

Change 1 2-356.7

TM 9-2320-365-20-1

e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Is continuity present from
connector PX26 socket 6
to socket 4?

YES

NO

12.

Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS

Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.

If continuity is not present,
wire 3083 from connector
PX26 socket 6 to socket 4 is
faulty. If continuity is present,
wire 3083 from connector
PX26 socket 4 to connector
J31 pin 16 is faulty.

Repair wire 3083 from connector PX26
socket 6 to socket 4 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 3083 from connector PX26 socket 4
to connector J31 pin 16 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-356.8 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX26 socket 6.
(3) Connect negative (-) probe of multimeter
to connector PX26 socket 4 and note
reading on multimeter.
(4) If continuity is not present, repair wire 3083
from connector PX26 socket 6 to socket 4
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, repair wire 3083
connector PX26 socket 4 to connector J31
pin 16 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).
(6) Connect connector PX26 to frequency ECU
connector.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-357

TM 9-2320-365-20-1

e15. AUDIBLE ALARM DOES NOT OPERATE

START

1.

WARNING
Read WARNING
on following page.
KNOWN INFO
TEST OPTIONS

Some lights on lighted indictor
display illuminate.
POSSIBLE PROBLEMS

Faulty audible alarm.
Faulty dashboard cable
assembly.
Faulty lighted indicator display.

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

YES
Go to step 4 of this fault.

KNOWN INFO
Some lights on lighted indictor
display illuminate.
POSSIBLE PROBLEMS

Faulty audible alarm.
Faulty dashboard cable
assembly.
Faulty lighted indicator display.

2.

Does audible alarm operate
with terminal lug TL160
connected to a known good
ground?

TEST OPTIONS

Operational Test

REASON FOR QUESTION

If audible alarm does not
operate when terminal lug
is TL160 grounded, audible
alarm is faulty.

NO

YES

WARNING
Read WARNING
on following page.

Is 24 VDC present at
terminal lug TL161?

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Air tanks drained (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

Replace audible alarm
(para 7-35).

TM 9-2320-365-20-1

2-358 Change 1

OPERATIONAL TEST

VOLTAGE TEST

WARNING

(1) Connect one end of electrical wire to
terminal lug TL160.
(2) Connect opposite end of electrical wire to
ground.
(3) Position master power switch to on (TM 9-
2320-365-10).
(4) If audible alarm does not operate, replace
audible alarm (para 7-35).
(5) Position master power switch to off (TM 9-
2320-365-10).

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to terminal lug TL161.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on (TM 9-
2320-365-10) and note reading on
multimeter.
(6) If 24 VDC is not present, go to step 4 of
this fault.
(7) Position master power switch to off (TM 9-
2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-359

TM 9-2320-365-20-1

e15. AUDIBLE ALARM DOES NOT OPERATE (CONT)

3.

Is continuity present from
terminal lug TL160 to
connector PX7 pin 19?

KNOWN INFO

POSSIBLE PROBLEMS

Some lights on lighted indictor
display illuminate.
Audible alarm OK.

Faulty dashboard cable
assembly.
Faulty lighted indicator display.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 1536 from terminal lug
TL160 to connector PX7
pin 19 is faulty. If continuity
is present, lighted indicator
display is faulty.

Replace lighted indicator
display (para 7-16).

YES
NO

CAUTION
Read CAUTION
on following page.

Replace lighted indicator
display (para 7-16).

YES
NO

Is continuity present from
terminal lug TL161 to
connector PX7 pin 16?

CAUTION
Read CAUTION
on following page.
4.

If continuity is not present,
wire 1532 from terminal lug
TL161 to connector PX7
pin 16 is faulty. If continuity
is present, lighted indicator
display is faulty.

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Faulty dashboard cable
assembly.
Faulty lighted indicator display.

POSSIBLE PROBLEMS

Some lights on lighted indictor
display illuminate.
Audible alarm OK.

KNOWN INFO

Repair wire 1536 from terminal lug TL160
to connector PX7 pin 19 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 1532 from terminal lug TL161
to connector PX7 pin 16 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-360 Change 1

CAUTION

CONTINUITY TEST

CONTINUITY TEST

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

(1) Disconnect connector PX7 from lighted
indicator display.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL161.
(4) Connect negative (-) probe of multimeter to
connector PX7 pin 16 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1532
from terminal lug TL161 to connector PX7
pin 16 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).
(6) If continuity is present, replace lighted
indicator display (para 7-16).
(7) Connect connector PX7 to lighted indicator
display.
(8) Install instrument panel assembly (para
7-15).

(1) Disconnect connector PX7 from lighted
indicator display.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL160.
(4) Connect negative (-) probe of multimeter to
connector PX7 pin 19 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1536
from terminal lug TL160 to connector PX7
pin 19 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).
(6) If continuity is present, replace lighted
indicator display (para 7-16).
(7) Connect connector PX7 to lighted indicator
display.
(8) Install instrument panel assembly (para
7-15).

Change 1 2-361

TM 9-2320-365-20-1

START

1.

Is continuity present across
troop transport alarm
switch?

KNOWN INFO

NO

YES

TEST OPTIONS

REASON FOR QUESTION

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE

If continuity is not present,
troop transport alarm
switch is faulty.

Steady tone audible alarm
operates.
POSSIBLE PROBLEMS

Faulty troop transport alarm
switch.
Faulty audible alarm.
Faulty engine control cable
assembly.
Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

Continuity Test or
STE/ICE-R Test #91

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

Materials/Parts
Lockwasher (2) (Item 72, Appendix G)
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

Replace troop transport alarm
switch (para 20-80).

TM 9-2320-365-20-1

2-362 Change 1

CONTINUITY TEST

(1) Remove two screws, lockwashers, and
terminal lugs TL164 and TL165 from
troop transport alarm switch. Discard
lockwashers.
(2) Lift switch cover on troop transport alarm
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of troop transport alarm
switch.
(5) Connect negative (-) probe of multimeter to
second terminal of troop transport alarm
switch.
(6) Position troop transport alarm switch to on
and note reading on multimeter.
(7) If continuity is not present, replace troop
transport alarm switch (para 20-80).
(8) Install terminal lugs TL165 and TL164 on
troop transport alarm switch with two
lockwashers and screws.
(9) Close switch cover on troop transport alarm
switch.

Change 1 2-363

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE (CONT)

2.

YES

NO

WARNING
Read WARNING
on following page.

Does troop transport audible
alarm operate when
connected to a known good
ground?

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.

POSSIBLE PROBLEMS

Faulty audible alarm.
Faulty engine control cable
assembly.
Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

If troop transport audible alarm
does not operate when
connected to a known good
ground, audible alarm is faulty.

Voltage Test or
STE/ICE-R Test #89

Replace audible alarm
(para 7-35).

TM 9-2320-365-20-1

2-364 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Start engine (TM 9-2320-365-10) and
allow enough pressure to build in air tanks
to cause steady tone audible alarm to
cease.
(2) Shut down engine (TM 9-2320-365-10).
(3) Remove PDP cover (TM 9-2320-365-10).
(4) Remove circuit breaker CB77 from PDP
(para 7-9).
(5) Remove instrument panel assembly for
access (para 7-15).
(6) Install circuit breaker CB77 on PDP
(para 7-9).
(7) Connect one end of electrical wire to
terminal lug TL178.
(8) Connect opposite end of electrical wire to
ground.
(9) Position master power switch to on (TM 9-
2320-365-10).
(10) If troop transport audible alarm does not
operate, replace audible alarm (para 7-35).
(11) Position master power switch to off (TM 9-
2320-365-10).
(12) Install PDP cover (TM 9-2320-365-10).

WARNING

Change 1 2-365

TM 9-2320-365-20-1

YES

NO

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE (CONT)

3.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

If continuity is not present,
wire 32 in engine control cable
is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector P31 socket 17 to
connector P39 socket 2?

CAUTION
Read CAUTION
on following page.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

4.

YES

NO

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

If continuity is not present,
wire 3028 in engine control
cable is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector P31 socket 9 to
connector P39 pin 1?

CAUTION
Read CAUTION
on following page.

Repair wire 32 in engine control cable
assembly (para 2-40) or replace engine
control cable assembly (para 7-72).

Repair wire 32 in engine control cable
assembly (para 2-40) or replace engine
control cable assembly (para 7-72).

TM 9-2320-365-20-1

2-366 Change 1

CAUTION

CONTINUITY TEST

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-367

TM 9-2320-365-20-1

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector P31 from connector
J31.
(3) Raise cab (TM 9-2320-365-10).
(4) Disconnect connector clamp from connector
P39.
(5) Disconnect connector P39 from connector
J39.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter to
connector P39 socket 2.
(8) Connect negative (-) probe of multimeter to
connector P31 socket 17 and note reading
on multimeter.
(9) If continuity is not present, repair wire 32 in
engine control cable (para 2-40) or replace
engine control cable assembly (para 7-72).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P39 pin 1.
(3) Connect negative (-) probe of multimeter to
connector P31 socket 9 and note reading on
multimeter.
(4) If continuity is not present, repair wire 3028
in engine control cable (para 2-40) or
replace engine control cable assembly (para
7-72).

YES

NO

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

POSSIBLE PROBLEMS

Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS

Faulty troop transport alarm
cable assembly.
Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

5.

6.

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.
Engine control cable assembly
OK.

If continuity is not present,
wire 32 in troop transport
alarm cable assembly is faulty.

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.
Engine control cable assembly
OK.

If continuity is not present,
wire 3028 in troop transport
alarm cable assembly is faulty.

Continuity Test or
STE/ICE-R Test #91

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector J39 pin 2 to
connector P921 pin A?

Is continuity present from
connector J39 socket 1 to
connector P921 pin C?

CAUTION
Read CAUTION
on following page.

CAUTION
Read CAUTION
on following page.

Repair wire 32 in troop transport alarm cable
assembly (para 2-40) or replace troop transport
alarm cable assembly (para 20-79).

Repair wire 32 in troop transport alarm cable
assembly (para 2-40) or replace troop transport
alarm cable assembly (para 20-79).

TM 9-2320-365-20-1

2-368 Change 1

CAUTION

CONTINUITY TEST

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-369

TM 9-2320-365-20-1

(1) Disconnect connector P921 from connector
J921.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P921 pin A.
(4) Connect negative (-) probe of multimeter to
connector J39 pin 2 and note reading on
multimeter.
(5) If continuity is not present, repair wire 3028
in troop transport alarm cable assembly
(para 2-40) or replace troop transport alarm
cable assembly (para 20-79).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J39 socket 1.
(3) Connect negative (-) probe of multimeter to
connector P921 pin C and note reading on
multimeter.
(4) If continuity is not present, repair wire 3028
in troop transport alarm cable assembly
(para 2-40) or replace troop transport alarm
cable assembly (para 20-79).
(5) Connect connector P39 to connector J39.
(6) Connect connector clamp on connector P39.
(7) Lower cab (TM 9-2320-365-10).

YES

NO

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE (CONT)

7.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

8.

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.
Engine control cable assembly
OK.
Troop transport alarm cable
assembly OK.

POSSIBLE PROBLEMS

If continuity is not present,
wire 32 in troop transport
alarm switch cable assembly
is faulty.

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.
Engine control cable assembly
OK.
Troop transport alarm cable
assembly OK.

POSSIBLE PROBLEMS

Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

Faulty troop transport alarm
switch cable assembly.
Faulty dashboard cable
assembly.

If continuity is not present,
wire 3028 in troop transport
alarm switch cable assembly
is faulty.

Continuity Test or
STE/ICE-R Test #91

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector J921 socket A to
terminal lug TL164?

Is continuity present from
connector J921 socket C to
terminal lug TL165?

CAUTION
Read CAUTION
on following page.

CAUTION
Read CAUTION
on following page.

Repair wire 32 in troop transport alarm
switch cable assembly (para 2-40) or
replace troop transport alarm switch
cable assembly (para 20-80).

Repair wire 3028 in troop transport alarm
switch cable assembly (para 2-40) or
replace troop transport alarm switch
cable assembly (para 20-80).

TM 9-2320-365-20-1

2-370 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J921 socket C.
(3) Connect negative (-) probe of multimeter to
terminal lug TL165 and note reading on
multimeter.
(4) If continuity is not present, repair wire 3028
in troop transport alarm switch cable
assembly (para 2-40) or replace troop
transport alarm switch cable assembly
(para 20-80).
(5) Connect connector P921 to connector
J921.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J921socket A.
(3) Connect negative (-) probe of multimeter to
terminal lug TL164 and note reading on
multimeter.
(4) If continuity is not present, repair wire 32 in
troop transport alarm switch cable
assembly (para 2-40) or replace troop
transport alarm switch cable assembly
(para 20-80).

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-370.1

TM 9-2320-365-20-1

YES

NO

e16. TROOP TRANSPORT AUDIBLE ALARM DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

9.

POSSIBLE PROBLEMS

If continuity is not present,
wire 3028 in dashboard cable
assembly is faulty. If continuity
is present, wire 32 in
dashboard cable assembly is
faulty.

Steady tone audible alarm
operates.
Troop transport alarm switch
OK.
Audible alarm OK.
Engine control cable assembly
OK.
Troop transport alarm cable
assembly OK.
Troop transport alarm switch
cable assembly OK.

Faulty dashboard cable
assembly.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector J31 pin 9 to
ground?

CAUTION
Read CAUTION
on following page.

Repair wire 3028 in dashboard cable
assembly (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

Repair wire 32 in dashboard cable
assembly (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

TM 9-2320-365-20-1

2-370.2 Change 1

CAUTION

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J31 pin 9.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3028
in dashboard cable assembly (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, repair wire 32 in
dashboard cable assembly (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Connect connector P31 to connector J31.
(7) Install instrument panel (para 7-15).

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-370.3

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

1.

REASON FOR QUESTION

TEST OPTIONS
KNOWN INFO

e16A. MASTER POWER SWITCH DOES NOT SHUT DOWN ENGINE

Master power switch off.

POSSIBLE PROBLEMS

Faulty master power switch.
Faulty relay K2.

WARNING
Read WARNING
on following page.

START

Visual Inspection

YES

NO

Does engine shut down when
circuit braker CB70 is
removed from Power
Distribution Panel (PDP)?

Replace master power switch
(para 7-18).

Replace relay K2 (para 7-09).

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

2-370.4 Change 2

If engine shuts down when
circuit breaker CB70 is
removed, master power switch
is faulty. If engine does not
shut down when circuit breaker
CB70, relay K2 is faulty.

TM 9-2320-365-20-1

WARNING

VISUAL INSPECTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 2 2-370.5

NOTE

All data on pages 2-370.6 through 2-370.9,
including pages 2-370.6 through d 2-370.9 deleted.

(1) Remove Power Distribution Panel (PDP)
cover (para 16-2).
(2) Remove circuit breaker CB79 from Power
Distribution Panl (PDP).
(3) Install circuit breaker CB79 in Power
Distribution Panel (PDP).
(4) Start engine (TM 9-2320-365-10).
(5) Position master power switch to off (TM
9-2320-365-10).
(6) Remove circuit breaker CB70 from Power
Distribution Panl (PDP).
(7) If engine does not shut down when circuit
breaker CB70 is removed, replace relay K2
(para 7-9).
(8) If engine shuts down when circuit breaker
CB70, replace master power switch
(para 7-18).

Perform step (9) if engine does not shut
down.

(9) Press start inhibit switch.
(10) Install circuit breaker CB70 in Power
Distribution Panel (PDP).
(11) Install Power Distribution Panel (PDP)
cover (para 16-2).

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Radiator fan off switch
illuminates.
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

e16B. LAMP TEST SWITCH DOES NOT ILLUMINATE

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-370.10 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX2A from lamp test
switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-370.11

TM 9-2320-365-20-1

e16B. LAMP TEST SWITCH DOES NOT ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Radiator fan off switch
illuminates.
Rocker switch lamp OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

2.

Is continuity present from
connector PX2A socket 2 to
a known good ground?
If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

Repair wire 3020 from connector PX2A
socket 2 to connector PX1A socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX2A
socket 1 to connector PX1A socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-370.12 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX2A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX2A socket 2 to connector
PX1A socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX2A socket 1 to connector
PX1A socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(6) Connect connector PX2A to lamp test
switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-371

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

e17. RADIATOR FAN OFF SWITCH DOES NOT ILLUMINATE

REAR BRAKE AIR gage
illuminates.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-372 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX1A from radiator
fan off switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-373

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

2.

If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

e17. RADIATOR FAN OFF SWITCH DOES NOT ILLUMINATE (CONT)

REAR BRAKE AIR gage
illuminates.
Rocker switch lamp OK.

Is continuity present from
connector PX1A socket 2 to
a known good ground?

Repair wire 3020 from connector PX1A
socket 2 to connector PX5 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX1A
socket 1 to connector PX5 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-374 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX1A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX1A socket 2 to connector
PX5 socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX1A socket 1 to connector
PX5 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(6) Connect connector PX1A to radiator fan off
switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

Change 1 2-375

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

e17A. ETHER START SWITCH DOES NOT ILLUMINATE

FUEL gage illuminates.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-376 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX13A from ether
start switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-376.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

2.

If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

e17A. ETHER START SWITCH DOES NOT ILLUMINATE (CONT)

FUEL gage illuminates.
Rocker switch lamp OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

Is continuity present from
connector PX13A socket 2
to a known good ground?

Repair wire 3020 from connector PX13A
socket 2 to connector PX9 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX13A
socket 1 to connector PX9 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-376.2 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX13A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX13A socket 2 to
connector PX9 socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX13A socket 1 to
connector PX9 socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Connect connector PX13A to ether start
switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

Change 1 2-376.3

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

e17B. HAZARD LIGHTS SWITCH DOES NOT ILLUMINATE

Amber warning light switch
illuminates.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-376.4 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX14A from hazard
lights switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-376.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

2.

If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

e17B. HAZARD LIGHTS SWITCH DOES NOT ILLUMINATE (CONT)

Is continuity present from
connector PX14A socket 2
to a known good ground?

Amber warning light switch
illuminates.
Rocker switch lamp OK.

Repair wire 3020 from connector PX14A
socket 2 to connector J913 pin 10 (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX14A
socket 1 to connector PX12A socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-376.6 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX14A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX14A socket 2 to
connector J913 pin 10 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX14A socket 1 to
connector PX12A socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Connect connector PX14A to hazard lights
switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

Change 1 2-376.7

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

e17C. AMBER WARNING LIGHT SWITCH DOES NOT ILLUMINATE

Master power switch
illuminates.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-376.8 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX12A from amber
warning light switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-376.9

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

2.

If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

e17C. AMBER WARNING LIGHT SWITCH DOES NOT ILLUMINATE (CONT)

Master power switch
illuminates.
Rocker switch lamp OK.
Is continuity present from
connector PX12A socket 2
to a known good ground?

Repair wire 3020 from connector PX12A
socket 2 to connector PX14A socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX12A
socket 1 to connector PX17A socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-376.10 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX12A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX12A socket 2 to
connector PX14A socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX12A socket 1 to
connector PX17A socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Connect connector PX12A to amber
warning light switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

Change 1 2-376.11

TM 9-2320-365-20-1

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
POSSIBLE PROBLEMS

Replace rocker switch
lamp (para 7-18).
YES

NO

Is continuity present
through rocker switch lamp?

Faulty rocker switch lamp.
Faulty dashboard cable
assembly.

If continuity is not present,
rocker switch lamp is faulty.

e17D. MASTER POWER SWITCH DOES NOT ILLUMINATE

OIL PRESS gage illuminates.

TM 9-2320-365-20-1

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

2-376.12 Change 1

CONTINUITY TEST

(1) Remove instrument panel for access (para
7-15).
(2) Disconnect connector PX17A from master
power switch lamp base connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
one terminal of lamp base connector.
(5) Connect negative (-) probe of multimeter to
second terminal of lamp base connector and
note reading on multimeter.
(6) If continuity is not present, replace rocker
switch lamp (para 7-18).

Change 1 2-376.13

TM 9-2320-365-20-1

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

2.

If continuity is not present,
wire 3020 is faulty. If
continuity is present, wire
1908 is faulty.

CAUTION
Read CAUTION
on following page.

NO

YES

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

e17D. MASTER POWER SWITCH DOES NOT ILLUMINATE (CONT)

OIL PRESS gage illuminates.
Rocker switch lamp OK.
Is continuity present from
connector PX17A socket 2
to a known good ground?

TM 9-2320-365-20-1

Repair wire 3020 from connector PX17A
socket 2 to connector PX12A socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector PX17A
socket 1 to connector PX6 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

2-376.14 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

Change 1 2-377

TM 9-2320-365-20-1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX17A socket 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3020
from connector PX17A socket 2 to
connector PX12A socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, repair wire 1908
from connector PX17A socket 1 to
connector PX6 socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Connect connector PX17A to master power
switch lamp base connector.
(7) Install instrument panel assembly (para
7-15).

e18. REAR BRAKE AIR GAGE DOES NOT ILLUMINATE

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO

Ether start switch illuminates.

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector PX5 socket 1 to a
known good ground?

CAUTION
Read CAUTION
on following page.

Faulty dashboard cable
assembly.
Faulty REAR BRAKE AIR gage.

If continuity is not present,
wire 3020 is faulty.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 3020 from connector PX5
socket 1 to connector PX13A socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-378 Change 1

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from REAR
BRAKE AIR gage connector.
(3) Disconnect connector PX5 from REAR
BRAKE AIR gage connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX5 socket 1.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3020
from connector PX5 socket 1 to connector
PX13A socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-379

TM 9-2320-365-20-1

e18. REAR BRAKE AIR GAGE DOES NOT ILLUMINATE (CONT)

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Replace REAR BRAKE AIR
gage (para 7-14).

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Ether start switch illuminates.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty REAR BRAKE AIR gage.

Is 12 VDC present at
connector PX5 socket 2?

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present, wire
1908 is faulty. If 12 VDC is
present, REAR BRAKE AIR
gage is faulty.

Repair wire 1908 from connector PX5
socket 2 to connector PX13A socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

lever to OFF (TM 9-2320-365-10).
(11) Connect connector PX5 to REAR BRAKE
AIR gage connector.
(12) Connect connector clamp on REAR BRAKE
AIR gage connector.
(13) Install instrument panel (para 7-15).

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX5 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(6) Position dimmer switch for maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector PX5 socket 2 to connector
PX13A socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, replace REAR BRAKE
AIR gage (para 7-14).
(9) Position main light switch to auxiliary lever
to OFF (TM 9-2320-365-10).

VOLTAGE TEST

Change 1 2-380.1

TM 9-2320-365-20-1

(10) Position main light switch main selector

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

If continuity is not present,
wire 3020 is faulty.

e18A. FUEL GAGE DOES NOT ILLUMINATE

FRONT BRAKE AIR gage
illuminates.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty FUEL gage.

Is continuity present from
connector PX9 socket 1 to a
known good ground?

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 3020 from connector PX9
socket 1 to connector PX4 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.2 Change 1

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from FUEL
gage connector.
(3) Disconnect connector PX9 from FUEL
gage connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX9 socket 1.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3020
from connector PX9 socket 1 to connector
PX4 socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

CAUTION

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-380.3

TM 9-2320-365-20-1

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

FRONT BRAKE AIR gage
illuminates.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty FUEL gage.

Is 12 VDC present at
connector PX9 socket 2?

If 12 VDC is not present, wire
1908 is faulty. If 12 VDC is
present, FUEL gage is faulty.

Replace FUEL gage
(para 7-14).

e18A. FUEL GAGE DOES NOT ILLUMINATE (CONT)

Repair wire 1908 from connector PX9
socket 2 to connector PX4 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.4 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX9 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(6) Position dimmer switch for maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector PX9 socket 2 to connector
PX4 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, replace FUEL gage
(para 7-14).
(9) Position main light switch to auxiliary lever
to OFF (TM 9-2320-365-10).

lever to OFF (TM 9-2320-365-10).
(11) Connect connector PX9 to FUEL gage
connector.
(12) Connect connector clamp on FUEL gage
connector.
(13) Install instrument panel (para 7-15).

Change 1 2-380.5

TM 9-2320-365-20-1

(10) Position main light switch main selector

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

If continuity is not present,
wire 3020 is faulty.

POSSIBLE PROBLEMS

e18B. FRONT BRAKE AIR GAGE DOES NOT ILLUMINATE

Speedometer illuminates.

Faulty dashboard cable
assembly.
Faulty FRONT BRAKE AIR
gage.

Is continuity present from
connector PX4 socket 1 to a
known good ground?

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 3020 from connector PX4
socket 1 to connector PX8 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.6 Change 1

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from FRONT
BRAKE AIR gage connector.
(3) Disconnect connector PX4 from FRONT
BRAKE AIR gage connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX4 socket 1.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3020
from connector PX4 socket 1 to connector
PX8 socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-380.7

TM 9-2320-365-20-1

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

e18B. FRONT BRAKE AIR GAGE DOES NOT ILLUMINATE (CONT)

Speedometer illuminates.

Faulty dashboard cable
assembly.
Faulty FRONT BRAKE AIR
gage.

Is 12 VDC present at
connector PX4 socket 2?

If 12 VDC is not present, wire
1908 is faulty. If 12 VDC is
present, FRONT BRAKE AIR
gage is faulty.

Replace FRONT BRAKE AIR
gage (para 7-14).

Repair wire 1908 from connector PX4
socket 2 to connector PX8 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.8 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX4 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(6) Position dimmer switch for maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector PX4 socket 2 to connector
PX8 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, replace FRONT
BRAKE AIR gage (para 7-14).
(9) Position main light switch to auxiliary lever
to OFF (TM 9-2320-365-10).

lever to OFF (TM 9-2320-365-10).
(11) Connect connector PX4 to FRONT BRAKE
AIR gage connector.
(12) Connect connector clamp on FRONT
BRAKE AIR gage connector.
(13) Install instrument panel (para 7-15).

Change 1 2-380.9

TM 9-2320-365-20-1

(10) Position main light switch main selector

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

If continuity is not present,
wire 3020 is faulty.

POSSIBLE PROBLEMS

e18C. SPEEDOMETER DOES NOT ILLUMINATE

Is continuity present from
connector PX8 socket 1 to a
known good ground?

VOLTS gage illuminates.

Faulty dashboard cable
assembly.
Faulty speedometer.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 3020 from connector PX8
socket 1 to connector PX10 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.10 Change 1

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-380.11

TM 9-2320-365-20-1

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from
speedometer connector.
(3) Disconnect connector PX8 from
speedometer connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX8 socket 1.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3020
from connector PX8 socket 1 to connector
PX10 socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

VOLTS gage illuminates.

Is 12 VDC present at
connector PX8 socket 2?

If 12 VDC is not present, wire
1908 is faulty. If 12 VDC is
present, speedometer is faulty.

e18C. SPEEDOMETER DOES NOT ILLUMINATE (CONT)

Repair wire 1908 from connector PX8
socket 2 to connector PX10 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace speedometer
(para 7-14).

Faulty dashboard cable
assembly.
Faulty speedometer.

TM 9-2320-365-20-1

2-380.12 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX8 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(6) Position dimmer switch for maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector PX8 socket 2 to connector
PX10 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, replace speedometer
(para 7-14).
(9) Position main light switch to auxiliary lever
to OFF (TM 9-2320-365-10).

lever to OFF (TM 9-2320-365-10).
(11) Connect connector PX8 to speedometer
connector.
(12) Connect connector clamp on speedometer
connector.
(13) Install instrument panel (para 7-15).

Change 1 2-380.13

TM 9-2320-365-20-1

(10) Position main light switch main selector

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

1.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

If continuity is not present,
wire 3020 is faulty.

e18D. VOLTS GAGE DOES NOT ILLUMINATE

WATER TEMP gage
illuminates.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty VOLTS gage.

Is continuity present from
connector PX10 socket 1 to
a known good ground?

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 3020 from connector PX10
socket 1 to connector PX11 socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.14 Change 1

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector clamp from VOLTS
gage connector.
(3) Disconnect connector PX10 from VOLTS
gage connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX10 socket 1.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3020
from connector PX10 socket 1 to connector
PX11 socket 1 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Change 1 2-380.15

TM 9-2320-365-20-1

KNOWN INFO
2.
TEST OPTIONS

REASON FOR QUESTION

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

e18D. VOLTS GAGE DOES NOT ILLUMINATE (CONT)

WATER TEMP gage
illuminates.

Faulty dashboard cable
assembly.
Faulty VOLTS gage.

Is 12 VDC present at
connector PX10 socket 2?

If 12 VDC is not present, wire
1908 is faulty. If 12 VDC is
present, VOLTS gage is faulty.

Replace VOLTS gage
(para 7-14).

Repair wire 1908 from connector PX10
socket 2 to connector PX11 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.16 Change 1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX10 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(6) Position dimmer switch for maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector PX10 socket 2 to
connector PX11 socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, replace VOLTS gage
(para 7-14).
(9) Position main light switch to auxiliary lever
to OFF (TM 9-2320-365-10).

lever to OFF (TM 9-2320-365-10).
(11) Connect connector PX10 to VOLTS gage
connector.
(12) Connect connector clamp on VOLTS gage
connector.
(13) Install instrument panel (para 7-15).

Change 1 2-380.17

TM 9-2320-365-20-1

(10) Position main light switch main selector

e18E. WATER TEMP GAGE DOES NOT ILLUMINATE

Materials/Parts
Dimmer Switch Test Wire (Item 20, Appendix E)

Personnel Required
(2)

References
TM 9-4910-571-12&P

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

START

1.

CAUTION
Read CAUTION
on following page.

Is continuity present from
main light switch pin F to
pin B?

KNOWN INFO

Circuit breaker CB70 OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dimmer switch.
Faulty dashboard cable
assembly.
Faulty WATER TEMP gage.

NO

Replace main light switch
(para 7-17).
YES

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB70 prior to beginning this task.

REASON FOR QUESTION

If continuity is not present,
main light switch is faulty.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-380.18 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove PDP cover (TM 9-2320-365-10).
(2) Remove circuit breaker CB70 from PDP.
(3) Remove instrument panel assembly for
access (para 7-15).
(4) Disconnect connector PX15 from main
light switch connector.
(5) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(6) Position main light switch auxiliary selector
lever to PNL BRT (TM 9-2320-365-10).
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to main light switch connector pin F.
(9) Connect negative (-) probe of multimeter to
main light switch connector pin B and note
reading on multimeter.
(10) If continuity is not present, replace main
light switch (para 7-17).
(11) Position main light switch auxiliary lever to
OFF (TM 9-2320-365-10).
(12) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).

Change 1 2-380.19

TM 9-2320-365-20-1

e18E. WATER TEMP GAGE DOES NOT ILLUMINATE (CONT)

KNOWN INFO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC present at
connector PX15 socket F?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
1586 is faulty.

2.

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty dimmer switch.
Faulty WATER TEMP gage.

YES

NO

Repair wire 1586 from connector PX15
socket F to circuit breaker CB70 socket 4
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.20 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Install circuit breaker CB70 on PDP.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector PX15 socket F.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 12 VDC is not present, repair wire 1586
from connector PX15 socket F to circuit
breaker CB70 socket 4 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-380.21

TM 9-2320-365-20-1

e18E. WATER TEMP GAGE DOES NOT ILLUMINATE (CONT)

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
1542 is faulty.

KNOWN INFO
3.

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty dimmer switch.
Faulty WATER TEMP gage.

Is 12 VDC present at
connector PX24 socket 1?

YES

NO

Repair wire 1542 from connector PX24
socket 1 to connector PX15 socket B (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.22 Change 1

VOLTAGE TEST

CAUTION

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove circuit breaker CB70 from PDP.
(2) Connect connector PX15 to main light
switch connector.
(3) Install circuit breaker CB70 on PDP.
(4) Disconnect connector clamp from dimmer
switch connector.
(5) Disconnect connector PX24 from dimmer
switch connector.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector PX24 socket 1.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(10) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(11) If 12 VDC is not present, repair wire 1542
from connector PX24 pin 1 to connector
PX15 socket B (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(12) Position main light switch auxiliary lever
to OFF (TM 9-2320-365-10).
(13) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).
(14) Install PDP cover (TM 9-2320-365-10).

Change 1 2-380.23

TM 9-2320-365-20-1

e18E. WATER TEMP GAGE DOES NOT ILLUMINATE (CONT)

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present,
dimmer switch is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.

Faulty dimmer switch.
Faulty dashboard cable
assembly.
Faulty WATER TEMP gage.

Is 12 VDC present at
dimmer switch connector
socket 2?

YES
Replace dimmer switch
(para 7-12).

NO

4.

TM 9-2320-365-20-1

2-380.24 Change 1

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(10) Position main light switch auxiliary lever to
OFF (TM 9-2320-365-10).
(11) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).
(12) Disconnect dimmer switch test wire from
dimmer switch connector.
(13) Disconnect dimmer switch test wire from
connector PX24.

(1) Position dimmer switch for maximum
brightness (TM 9-2320-365-10).
(2) Install dimmer switch test wire pin in
connector PX24 socket 1.
(3) Install dimmer switch test wire socket
on dimmer switch connector pin 1.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to dimmer switch connector socket 2.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(8) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(9) If 12 VDC is not present, replace dimmer
switch (para 7-12).

Change 1 2-380.25

TM 9-2320-365-20-1

e18E. WATER TEMP GAGE DOES NOT ILLUMINATE (CONT)

CAUTION
Read CAUTION
on following page.
5.
TEST OPTIONS
KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WATER TEMP gage.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 1908 is faulty.

Replace WATER TEMP gage
(para 7-14).

NO

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WATER TEMP gage.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector PX11 socket 1 to
a known good ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 3020 is faulty. If
continuity is present, WATER
TEMP gage is faulty.

YES

NO

6.

Is continuity present from
connector PX11 socket 2 to
connector PX24 pin 2?

Circuit breaker CB70 OK.
Main light switch OK.
Dimmer switch OK.

Circuit breaker CB70 OK.
Main light switch OK.
Dimmer switch OK.

YES

Repair wire 1908 from connector PX11
socket 2 to connector PX24 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3020 from connector PX11
socket 1 to connector PX6 socket 1 (para
2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-380.26 Change 1

CONTINUITY TEST

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Disconnect connector clamp from WATER
TEMP gage connector.
(2) Disconnect connector PX11 from WATER
TEMP gage connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX11 socket 2.
(5) Connect negative (-) probe of multimeter to
connector PX24 pin 2 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1908
from connector PX11 socket 2 to connector
PX24 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX11 socket 1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3020 from connector PX11 socket 1 to
connector PX6 socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace WATER
TEMP gage (para 7-14).
(6) Connect connector PX24 to dimmer switch
connector.
(7) Connect connector clamp on dimmer
switch connector.
(8) Connect connector PX11 to WATER TEMP
gage connector.
(9) Connect connector clamp on WATER
TEMP gage connector.
(10) Install instrument panel assembly (para
7-15).

Change 1 2-381

TM 9-2320-365-20-1

Materials/Parts
Dimmer Switch Test Wire (Item 20, Appendix E)

Personnel Required
(2)

References
TM 9-4910-571-12&P

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

START

1.

CAUTION
Read CAUTION
on following page.

Is continuity present from
main light switch pin F to
pin B?

KNOWN INFO

Circuit breaker CB70 OK.

POSSIBLE PROBLEMS

NO

Replace main light switch
(para 7-17).
YES

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB70 prior to beginning this task.

REASON FOR QUESTION

If continuity is not present,
main light switch is faulty.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

e19. OIL PRESS GAGE DOES NOT ILLUMINATE

Faulty main light switch.
Faulty dimmer switch.
Faulty dashboard cable
assembly.
Faulty OIL PRESS gage.

TM 9-2320-365-20-1

2-382 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove PDP cover (TM 9-2320-365-10).
(2) Remove circuit breaker CB70 from PDP.
(3) Remove instrument panel assembly for
access (para 7-15).
(4) Disconnect connector PX15 from main
light switch connector.
(5) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(6) Position main light switch auxiliary selector
lever to PNL BRT (TM 9-2320-365-10).
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to main light switch connector pin F.
(9) Connect negative (-) probe of multimeter to
main light switch connector pin B and note
reading on multimeter.
(10) If continuity is not present, replace main
light switch (para 7-17).
(11) Position main light switch auxiliary lever to
OFF (TM 9-2320-365-10).
(12) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).

Change 1 2-383

TM 9-2320-365-20-1

KNOWN INFO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC present at
connector PX15 socket F?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
1586 is faulty.

2.

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.

YES

NO

Repair wire 1586 from connector PX15
socket F to circuit breaker CB70 socket 4
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e19. OIL PRESS GAGE DOES NOT ILLUMINATE (CONT)

Faulty dashboard cable
assembly.
Faulty dimmer switch.
Faulty OIL PRESS gage.

TM 9-2320-365-20-1

2-384 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Install circuit breaker CB70 on PDP.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector PX15 socket F.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 12 VDC is not present, repair wire 1586
from connector PX15 socket F to circuit
breaker CB70 socket 4 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-384.1

TM 9-2320-365-20-1

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
1542 is faulty.

KNOWN INFO
3.

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.
Is 12 VDC present at
connector PX24 socket 1?

YES

NO

Repair wire 1542 from connector PX24
socket 1 to connector PX15 socket B (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e19. OIL PRESS GAGE DOES NOT ILLUMINATE (CONT)

Faulty dashboard cable
assembly.
Faulty dimmer switch.
Faulty OIL PRESS gage.

TM 9-2320-365-20-1

2-384.2 Change 1

VOLTAGE TEST

CAUTION

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove circuit breaker CB70 from PDP.
(2) Connect connector PX15 to main light
switch connector.
(3) Install circuit breaker CB70 on PDP.
(4) Disconnect connector clamp from dimmer
switch connector.
(5) Disconnect connector PX24 from dimmer
switch connector.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector PX24 socket 1.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(10) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(11) If 12 VDC is not present, repair wire 1542
from connector PX24 pin 1 to connector
PX15 socket B (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(12) Position main light switch auxiliary lever
to OFF (TM 9-2320-365-10).
(13) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).
(14) Install PDP cover (TM 9-2320-365-10).

Change 1 2-384.3

TM 9-2320-365-20-1

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present,
dimmer switch is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Circuit breaker CB70 OK.
Main light switch OK.
Is 12 VDC present at
dimmer switch connector
socket 2?

YES
Replace dimmer switch
(para 7-12).

NO

4.

e19. OIL PRESS GAGE DOES NOT ILLUMINATE (CONT)

Faulty dimmer switch.
Faulty dashboard cable
assembly.
Faulty OIL PRESS gage.

TM 9-2320-365-20-1

2-384.4 Change 1

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(10) Position main light switch auxiliary lever to
OFF (TM 9-2320-365-10).
(11) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).
(12) Disconnect dimmer switch test wire from
dimmer switch connector.
(13) Disconnect dimmer switch test wire from
connector PX24.

(1) Position dimmer switch for maximum
brightness (TM 9-2320-365-10).
(2) Install dimmer switch test wire pin in
connector PX24 socket 1.
(3) Install dimmer switch test wire socket
on dimmer switch connector pin 1.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to dimmer switch connector socket 2.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(8) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(9) If 12 VDC is not present, replace dimmer
switch (para 7-12).

Change 1 2-384.5

TM 9-2320-365-20-1

CAUTION
Read CAUTION
on following page.
5.
TEST OPTIONS
KNOWN INFO

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 1908 is faulty.

NO

KNOWN INFO

POSSIBLE PROBLEMS

CAUTION
Read CAUTION
on following page.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

YES

NO

6.

Circuit breaker CB70 OK.
Main light switch OK.
Dimmer switch OK.

Circuit breaker CB70 OK.
Main light switch OK.
Dimmer switch OK.

YES

e19. OIL PRESS GAGE DOES NOT ILLUMINATE (CONT)

Faulty dashboard cable
assembly.
Faulty OIL PRESS gage.

Faulty dashboard cable
assembly.
Faulty OIL PRESS gage.

Is continuity present from
connector PX6 socket 2 to
connector PX24 pin 2?

Repair wire 1908 from connector PX6
socket 2 to connector PX24 pin 2 (para
2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Is continuity present from
connector PX6 socket 1 to
a known good ground?
If continuity is not present,
wire 3020 is faulty. If
continuity is present, OIL
PRESS gage is faulty.

Repair wire 3020 from connector PX6
socket 1 to connector PX17A socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace OIL PRESS gage
(para 7-14).

TM 9-2320-365-20-1

2-384.6 Change 1

CONTINUITY TEST

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Disconnect connector clamp from OIL
PRESS gage connector.
(2) Disconnect connector PX6 from OIL PRESS
gage connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX6 socket 2.
(5) Connect negative (-) probe of multimeter to
connector PX24 pin 2 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1908
from connector PX6 socket 2 to connector
PX24 socket 2 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector PX6 socket 1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3020 from connector PX6 socket 1 to
connector PX17A socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace OIL PRESS
gage (para 7-14).
(6) Connect connector PX24 to dimmer switch
connector.
(7) Connect connector clamp on dimmer
switch connector.
(8) Connect connector PX6 to OIL PRESS
gage connector.
(9) Connect connector clamp on OIL PRESS
gage connector.
(10) Install instrument panel assembly (para
7-15).

Change 1 2-385

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-386
2-386
2-386
2-386
2-386

1.

YES

START

Circuit breaker OK.
Other lights operate.

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty dimmer switch.

Is continuity present
between main light
switch terminals B
and F?

If continuity is not present,
main light switch is
faulty.

Continuity Test or
STE/ICE-R #91

e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Replace main light
switch (para 7-17).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-387
2-387
2-387
2-387
2-387

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX15 from main light
switch.
(3) Set multimeter to ohms.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PANEL BRT (TM 9-2320-365-10).
(6) Connect positive (+) probe of multimeter to
main light switch terminal F.
(7) Connect negative (-) probe of multimeter to
main light switch terminal B and note
reading on multimeter.
(8) If continuity is not present, replace main
light switch (para 7-17).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-388
2-388
2-388
2-388
2-388

If continuity is not present,
wire 1542 is faulty.

Is continuity present
between
connector PX15-B
and connector PX24-1?

YES

2.

NO

Circuit breaker OK.
Other lights operate.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty dimmer switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

YES

Is continuity present
between connector JX24
terminals 1 and 2?

3.

NO

Circuit breaker OK.
Other lights operate.
Main light switch OK.

Faulty dimmer switch.
Faulty dashboard cable
assembly.

If continuity is not present,
dimmer switch is faulty. If
continuity is present,
wire 1908 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Repair wire 1542 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace dimmer switch
(para 7-12).

Repair wire 1908 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE (CONT)
e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE (CONT)
e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE (CONT)
e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE (CONT)
e20. AUXILIARY PANEL, PERSONNEL HEATER, AND INSTRUMENT PANEL DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-389
2-389
2-389
2-389
2-389

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector PX24 from dimmer
switch.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX15-B.
(4) Connect negative (-) probe of multimeter to
connector PX24-1 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1542
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(6) Connect connector PX15 to main light switch.

(1) Position dimmer switch to maximum
illumination (TM 9-2320-365-10).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
dimmer switch connector terminal 1.
(4) Connect negative (-) probe of multimeter to
dimmer switch connector terminal 2 and
note reading on multimeter.
(5) If continuity is not present, replace dimmer
switch (para 7-12).
(6) If continuity is present, repair wire 1908
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Connect connector PX24 to dimmer switch.
(8) Install instrument panel assembly (para 7-15).

e21. TACHOMETER DOES NOT ILLUMINATE

Personnel Required
(2)

References
TM 9-4910-571-12&P

1.
KNOWN INFO
Hazard lights switch
illuminates.
POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

YES

START

This question eliminates
possible problems and
determines where
troubleshooting continues.

Faulty auxiliary panel cable
assembly.
Faulty dashboard cable
assembly.
Faulty tachometer.

NO

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector P901 socket 1 to
a known good ground?

Go to step 4 of this fault.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

TM 9-2320-365-20-1

2-390 Change 1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.
(3) Disconnect connector clamp from
tachometer connector.
(4) Disconnect connector P901 from
tachometer connector.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector P901 socket 1.
(7) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(8) If continuity is not present, go to step 4 of
this fault.

Change 1 2-391

TM 9-2320-365-20-1

e21. TACHOMETER DOES NOT ILLUMINATE (CONT)

2.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

Hazard lights switch
illuminates.
POSSIBLE PROBLEMS

Faulty auxiliary panel cable
assembly.
Faulty dashboard cable
assembly.
Faulty tachometer.

Is 12 VDC present at
connector P901 socket 2?

If 12 VDC is present,
tachometer is faulty.

Replace tachometer
(para 7-21).

YES

NO

Go to step 3 of this fault.

TM 9-2320-365-20-1

2-392 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
connector P901 socket 2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(6) If 12 VDC is not present, go to step 3 of
this fault.
(7) If 12 VDC is present, replace tachometer
(para 7-21).
(8) Position main light switch auxiliary lever
to OFF (TM 9-2320-365-10).
(9) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).

Change 1 2-392.1

TM 9-2320-365-20-1

e21. TACHOMETER DOES NOT ILLUMINATE (CONT)

3.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
1908 in dashboard cable
assembly is faulty. If 12 VDC
is present, wire 1908 in
auxiliary panel cable is faulty.

KNOWN INFO
Hazard lights switch
illuminates.
Tachometer OK.
POSSIBLE PROBLEMS

Faulty auxiliary panel cable
assembly.
Faulty dashboard cable
assembly.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

YES

NO

Is 12 VDC present at
connector J913 socket 11?

Repair wire 1908 from connector J913
socket 11 to connector PX14A socket 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1908 from connector P913
pin 11 to connector P901 socket 2
(para 2-40) or replace auxiliary panel
cable assembly (para 7-49).

TM 9-2320-365-20-1

2-392.2 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Remove personnel heater for access (para
18-9).
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J913 socket 11.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch main selector
lever to SER DRIVE (TM 9-2320-365-10).
(6) Position main light switch auxiliary lever
to PNL BRT (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 VDC is not present, repair wire 1908
from connector J913 socket 11 to
connector PX14A socket 1 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If 12 VDC is present, repair wire 1908
from connector P913 pin 11 to connector
P901 socket 2 (para 2-40) or replace
auxiliary panel cable assembly (para 7-49).
(9) Position main light switch auxiliary lever
to OFF (TM 9-2320-365-10).
(10) Position main light switch main selector
lever to OFF (TM 9-2320-365-10).
(11) Install personnel heater assembly (para
18-9).

Change 1 2-392.3

TM 9-2320-365-20-1

e21. TACHOMETER DOES NOT ILLUMINATE (CONT)

KNOWN INFO
Hazard lights switch
illuminates.
Tachometer OK.
POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

Faulty auxiliary panel cable
assembly.
Faulty dashboard cable
assembly.

If continuity is not present,
auxiliary panel cable assembly
is faulty.

4.

Is continuity present from
connector P901 socket 1 to
connector P913 pin 10?

NO

YES

Repair wire 3020 from connector P901
socket 1 to connector P913 pin 10
(para 2-40) or replace auxiliary panel
cable assembly (para 7-49).

Repair wire 3020 from connector J913
socket 10 to terminal board TB2 position 31
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-392.4 Change 1

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove personnel heater assembly for
access (para 18-9).
(2) Disconnect connector P913 from connector
J913.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P901 socket 1.
(5) Connect negative (-) probe of multimeter to
connector P913 pin 10 and note reading on
multimeter.
(6) If continuity is not present, repair wire 3020
from connector P901 socket 1 to connector
P913 pin 10 (para 2-40) or replace auxiliary
panel cable assembly (para 7-49).
(7) If continuity is present, repair wire 3020
from connector J913 socket 10 to terminal
board TB2 position 31 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(8) Install personnel heater assembly (para
18-9).

Change 1 2-393

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-394
2-394
2-394
2-394
2-394

1.

START

YES

Is continuity present
through lamp?
If continuity is not present,
lamp is faulty.

NO

Faulty lamp.
Faulty auxiliary panel
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Other auxiliary panel
switches illuminate.

e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Replace lamp
(para 7-18).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-395
2-395
2-395
2-395
2-395

NOTE

CONTINUITY TEST

All auxiliary panel switch
illumination faults are traced the
same way. Power Take-Off (PTO)
switch shown.

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.

NOTE

Main connector and "A" connector
will come off as a unit.

(3) Disconnect PTO switch connector from PTO
switch.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
PTO switch lamp terminal 1.
(6) Connect negative (-) probe of multimeter to
PTO switch lamp terminal 2 and note reading
on multimeter.
(7) If continuity is not present, replace lamp
(para 7-18).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-396
2-396
2-396
2-396
2-396

e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE (CONT)
e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE (CONT)
e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE (CONT)
e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE (CONT)
e22. AUXILIARY PANEL SWITCH DOES NOT ILLUMINATE (CONT)

YES

2.

If 12 vdc is not present,
wire 1908 is faulty. If
12 vdc is present,
wire 3020 is faulty.

WARNING
Read WARNING
on following page.

NO

Faulty auxiliary panel
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89
Is 12 vdc present at
connector?

Other auxiliary panel
switches illuminate.
Lamp OK.

Repair wire 1908 (para 2-40)
or replace auxiliary panel cable
assembly (all models except M1079
w/o winch) (para 7-49) or M1079 w/o
winch auxiliary panel cable assembly
(para 7-50).

Repair wire 3020 (para 2-40)
or replace auxiliary panel cable
assembly (all models except M1079
w/o winch) (para 7-49) or M1079 w/o
winch auxiliary panel cable assembly
(para 7-50).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-397
2-397
2-397
2-397
2-397

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
"A" switch connector terminal 1.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch auxiliary lever to
PANEL BRT (TM 9-2320-365-10).
(5) Position dimmer switch to maximum
brightness (TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, repair wire 1908
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49) or M1079 w/o winch
auxiliary panel cable assembly (para 7-50).
(8) If 12 vdc is present, repair wire 3020
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49) or M1079 w/o winch
auxiliary panel cable assembly (para 7-50).
(9) Position main light switch to OFF
(TM 9-2320-365-10).
(10) Connect PTO switch connector to PTO
switch.
(11) Position auxiliary panel on auxiliary panel
housing with six screws.
(12) Tighten six screws to 24 lb-in. (3 N·m).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-398
2-398
2-398
2-398
2-398

1.

START

Instrument panel switches
illuminate.

YES

If 12 vdc is not present,
wire 1908 is faulty.

NO

WARNING
Read WARNING
on following page.

Faulty dashboard cable
assembly.
Faulty auxiliary panel
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89
Is 12 vdc present on
connector P913-11?

e23. AUXILIARY PANEL DOES NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Repair wire 1908 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-399
2-399
2-399
2-399
2-399

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector J913 from
connector P913.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P913-11.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to STOP LIGHT
and PANEL BRIGHT (TM 9-2320-365-10)
and note reading on multimeter.
(7) If 12 vdc is not present, repair wire 1908
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-400
2-400
2-400
2-400
2-400

2.
Continuity Test
STE/ICE-R #91

If continuity is not present,
wire 3020 is faulty.

YES

NO

3.
Continuity Test
STE/ICE-R #91

YES

NO

Instrument panel switches
illuminate.
Dashboard cable
assembly OK.

Faulty auxiliary panel
cable assembly.

Is continuity present
between connector P913-11
and connector P914A-1?

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
between connector J913-10
and connector P914A-2?

Instrument panel switches
illuminate.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty auxiliary panel
cable assembly.

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

If continuity is not present,
wire 1908 is faulty.

Repair wire 1908 (para 2-40)
or replace auxiliary panel
cable assembly (all models
except M1079 w/o winch)
(para 7-49) or M1079 w/o winch
auxiliary panel cable assembly
(para 7-50).

Fault corrected.

Repair wire 3020 (para 2-40)
or replace auxiliary panel
cable assembly (all models
except M1079 w/o winch)
(para 7-49) or M1079 w/o winch
auxiliary panel cable assembly
(para 7-50).

e23. AUXILIARY PANEL DOES NOT ILLUMINATE (CONT)
e23. AUXILIARY PANEL DOES NOT ILLUMINATE (CONT)
e23. AUXILIARY PANEL DOES NOT ILLUMINATE (CONT)
e23. AUXILIARY PANEL DOES NOT ILLUMINATE (CONT)
e23. AUXILIARY PANEL DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-401
2-401
2-401
2-401
2-401

CONTINUITY TEST

CONTINUITY TEST

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel housing
to gain access.
(3) Disconnect connector P914A from fuel preheat
switch, if equipped.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector J913-10.
(6) Connect negative (-) probe of multimeter to
connector P914A-2 and note reading on
multimeter.
(7) If continuity is not present, repair wire 3020
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49) or M1079 w/o winch
auxiliary panel cable assembly (para 7-50).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P913-11.
(3) Connect negative (-) probe of multimeter to
connector P914A-1 and note reading on
multimeter.
(4) If continuity is not present, repair wire 1908
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o winch)
(para 7-49) or M1079 w/o winch auxiliary panel
cable assembly (para 7-50).
(5) Connect connector P914A to fuel preheat
switch, if equipped.
(6) Position auxiliary panel housing on auxiliary
panel with six screws.
(7) Tighten six screws to 24 lb-in. (3 N·m).
(8) Connect connector P913 to connector J913.
(9) Install personnel heater (para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-402
2-402
2-402
2-402
2-402

1.

START

YES

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other indicator lights
operate.

NO

Faulty water temperature
switch.
Faulty lighted indicator
display lamp.
Faulty engine control
cable assembly.
Faulty dashboard cable
assembly.
Faulty lighted indicator
display.

Is continuity present
between lighted indicator
display terminals 12
and 27?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Go to step 4 of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-403
2-403
2-403
2-403
2-403

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 12 and
note reading on multimeter.
(7) If continuity is not present, go to step 4 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-404
2-404
2-404
2-404
2-404

YES

2.

3.

If continuity is not present,
wire 35 is faulty.

Is continuity present
between connector PX7-12
and connector P37-2?

YES

Is continuity present
between connector P37-1
and a known good ground?
If continuity is not present,
wire 3026 is faulty. If
continuity is present,
water temperature switch
is faulty.

NO

Other indicator lights
operate.
Lighted indicator
display OK.

Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.
Faulty water temperature
switch.

NO

Go to step 6 of this fault.

Other indicator display
lights operate.
Lighted indicator
display OK.

Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.
Faulty water temperature
switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Continuity Test or
STE/ICE-R #91

Go to step 5 of this fault.

Replace water temperature
switch (para 7-42).

e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-405
2-405
2-405
2-405
2-405

CONTINUITY TEST

CONTINUITY TEST

(1) Raise cab (TM 9-2320-365-10).
(2) Set multimeter to ohms.
(3) Disconnect connector clamp from connector
J37.
(4) Disconnect connector P37 from connector
J37.
(5) Connect positive (+) probe of multimeter to
connector P37-2.
(6) Connect negative (-) probe of multimeter to
connector PX7-12 and note reading on
multimeter.
(7) If continuity is not present, go to step 5 of
this fault.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P37-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 6 of
this fault.
(5) If continuity is present, replace water
temperature switch (para 7-42).
(6) Connect connector P37 to connector J37.
(7) Connect connector clamp on connector J37.
(8) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-406
2-406
2-406
2-406
2-406

YES

4.
Other indicator lights
operate.

NO

If continuity is not present,
high engine temperature
indicator lamp is faulty.
If continuity is present,
lighted indicator display
is faulty.

Faulty lighted indicator
display lamp.
Faulty lighted indicator
display.

Is continuity present
through high engine
temperature indicator
lamp?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Replace high engine temperature
indicator lamp (para 7-16).

Replace lighted indicator
display (para 7-16).

e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-407
2-407
2-407
2-407
2-407

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove high engine temperature lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each high engine
temperature indicator lamp and note
reading on multimeter.
(6) If continuity is not present, replace lamp
(para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install high engine temperature lamps in printed
circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-408
2-408
2-408
2-408
2-408

YES

NO

5.

Is continuity present
between connector PX7-12
and connector J31-22?

Other indicator lights
operate.
Lighted indicator
display OK.
Water temperature
switch OK.

Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.

If continuity is not present,
wire 35 in dashboard
cable assembly is faulty.
If continuity is present,
wire 35 in engine control
cable assembly is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

YES

NO

6.

Is continuity present
between connector J31-10
and ground?

Other indicator display
lights operate.
Lighted indicator
display OK.
Water temperature
switch OK.

Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.

If continuity is not present,
wire 3026 in dashboard
cable assembly is faulty.
If continuity is present,
wire 3026 in engine control
cable assembly is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Repair wire 35 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

Repair wire 35 (para 2-40)
or replace engine control
cable assembly (para 7-72).

Repair wire 3026 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
(para (7-11).

Repair wire 3026 (para 2-40)
or replace engine control
cable assembly (para 7-72).

e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e24. HIGH ENGINE TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

CONTINUITY TEST

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Set multimeter to ohms.
(3) Disconnect connector J31 from connector
P31.
(4) Connect positive (+) probe of multimeter to
connector PX7-12.
(5) Connect negative (-) probe of multimeter to
connector J31-22 and note reading on
multimeter.
(6) If continuity is not present, repair wire 35
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para (7-11).
(7) If continuity is present, repair wire 35
(para 2-40) or replace engine control cable
assembly (para 7-72).
(8) Connect connector J31 to connector P31.
(9) Install instrument panel assembly (para 7-15).
(10) Connect lighted indicator display to connector
PX7.
(11) Position lighted indicator display in instrument
panel assembly with four screws.

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Set multimeter to ohms.
(3) Disconnect connector J31 from connector
P31.
(4) Connect positive (+) probe of multimeter to
connector J31-10.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If continuity is not present, repair wire 3026
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If continuity is present, repair wire 3026
(para 2-40) or replace engine control cable
assembly (para 7-72).
(8) Connect connector J31 to connector P31.
(9) Install instrument panel assembly (para 7-15).
(10) Connect lighted indicator display to connector
PX7.
(11) Position lighted indicator display in instrument
panel assembly with four screws.

TM 9-2320-365-20-1

Change 2 2-408.1

(12) Tighten four screws to 6-10 lb-in. (1 N∙m).
(13) Connect batteries (para 7-48).

(12) Tighten four screws to 6-10 lb-in. (1 N∙m).
(13) Connect batteries (para 7-48).

KNOWN INFO

Does high engine temperature
indicator illuminate when
master power switch is
positioned to on?

1.

CAUTION
Read CAUTION
on following page.

START

TEST OPTIONS

REASON FOR QUESTION

If high engine temperature
indicator does not illuminate
when master power switch is
positioned to on, coolant
temperature light switch is
faulty.

NO

YES
Replace coolant temperature light switch
(para 7-22).

Operational Test

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-408.2 Change 2

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.

POSSIBLE PROBLEMS

Faulty coolant temperature
light switch.
Faulty LAMP TEST switch (if
equipped).
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

TM 9-2320-365-20-1

OPERATIONAL TEST

Ensure engine has cooled before performing
this troubleshooting task. Failure to comply
may result in incorrect test results.

(1) Position master power switch to on
(TM 9-2320-365-10).
(2) Check to see if high engine temperature
indicator illuminates (TM 9-2320-365-10).
(3) If high engine temperature indicator illuminates,
replace coolant temperature light switch
(para 7-22).
(4) Position master power switch to off
(TM 9-2320-365-10).

Change 2 2-408.3

CAUTION

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Continuity Test or
STE/ICE-R Test #91
Is continuity present from
coolant temperature light
switch connector socket 2 to
known good ground?

If continuity is present, coolant
temperature light switch is
faulty.

Replace coolant temperature
light switch (para 7-22).

CAUTION
Read CAUTION
on following page.
KNOWN INFO
2.

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

Go to step 3 of this fault.

TM 9-2320-365-20-1

2-408.4 Change 2

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.

POSSIBLE PROBLEMS

Faulty coolant temperature
light switch.
Faulty LAMP TEST switch (if
equipped).
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CAUTION

TM 9-2320-365-20-1

Change 2 2-408.5

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector clamp from coolant
temperature light switch connector,
(3) Disconnect connector P37 from coolant
temperature light switch.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
coolant temperature light switch connector
socket 2.
(6) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(7) If continuity is not present, go to step 3 of
this Fault.
(8) If continuity is present, replace coolant
temperature light switch (para 7-22).
(9) Connect connector P37 to coolant
temperature light switch.
(10) Connect connector clamp to coolant
temperature light switch connector.
(11) Lower cab (TM 9-2320-365-10).

CONTINUITY TEST

KNOWN INFO

NO

Is vehicle equipped with
LAMP TEST switch?

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

3.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

If TRANS OIL TEMP indicator
illuminates with high engine
temperature indicator, LAMP
TEST switch is faulty.

4.

Replace LAMP TEST switch (par 7-18).

Go to step 6 of this fault.

Is TRANS OIL TEMP indicator
illuminated?

Operational Test

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

2-408.6 Change 2

Go to step 5 of this fault.

TM 9-2320-365-20-1

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.

POSSIBLE PROBLEMS

Faulty LAMP TEST switch.
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.

POSSIBLE PROBLEMS

Faulty LAMP TEST switch (if
equipped).
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

OPERATIONAL TEST

(1) Check to see if vehicle is equipped with LAMP
TEST switch (TM 9-2320-365-10).
(2) If vehicle is not equipped with LAMP TEST switch
go to step 6 of this fault.

(1) Position master power switch to on
(TM 9-2320-365-10).
(2) Check to see if TRANS OIL TEMP indicator
illuminates (TM 9-2320-365-10).
(3) If TRANS OIL TEMP indicator does not
illuminate, go to step 5 of this fault.
(4) If TRANS OIL TEMP indicator illuminates,
replace LAMP TEST switch (para 7-18).
(5) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 2 2-408.7

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

5.

Does high engine temperature
indicator illuminate when
connector PX2 is
disconnected?

Go to step 7 of this fault.

NO

Replace LAMP TEST switch (para 7-18).
YES

Operational Test

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

2-408.8 Change 2

TM 9-2320-365-20-1

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master
power switch is positioned to
on.
Coolant temperature light
switch OK.

POSSIBLE PROBLEMS

Faulty LAMP TEST switch.
Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

If high engine temperature
indicator does not illuminate
when connector PX2 is
disconnected, LAMP TEST
switch is faulty. If high engine
temperature indicator
illuminates when connector
PX2 is disconnected, go to
step 7 of this fault.

OPERATIONAL TEST

TM 9-2320-365-20-1

(1) Remove instrument panel for access
(para 7-15).
(2) Disconnect connector PX2 from LAMP TEST
switch connector.
(3) Position master power switch to on
(TM 9-2320-365-10).
(4) Check to see if high engine temperature
indicator illuminates (TM 9-2320-365-10).
(5) If high engine temperature indicator does not
illuminate, replace LAMP TEST switch
(para 7-18).
(6) If high engine temperature indicator illuminates,
go to step 7 of this fault.

Change 2 2-408.9

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Is vehicle equipped with
connector PX2?

Visual Inspection

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 9 of this fault.

KNOWN INFO
6.

KNOWN INFO
7.

Is 24 VDC present at
connector J31 pin 22?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

NO

WARNING
Read WARNING
on following page.

Go to step 10 of this fault.

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

TM 9-2320-365-20-1

2-408.10 Change 2

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.
LAMP TEST switch OK (if
equipped).

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Check to see if connector PX2 is in dashboard.
(3) If vehicle is not equipped with connector PX2, go
step 9 of this fault.

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 2 2-408.11

(1) Disconnect batteries (para 7-48).
(2) Disconnect connector J31 form connector P31.
(3) Connect batteries (para 7-48)
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector J31 pin 22.
(6) Connect negative probe of multimeter to known
good ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 10 of this
fault.
(9) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

8.

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89
Is 24 VDC present at
connector PX2 socket 1?

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

2-408.12 Change 2

Repair wire 35 from connector P31 socket
22 to connector P37 pin 2 (para 2-40) or replace
engine control cable assembly (para 7-72).

TM 9-2320-365-20-1

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.
LAMP TEST switch OK (if
equipped).

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

If 24 VDC is not present, wire
35 from splice E88 to
connector PX2 socket 1 is
faulty. If 24 VDC is present,
wire 35 from connector P31
socket 22 to connector P37 pin
2 is faulty.

NO

YES

Repair wire 35 from splice E88 to connector
J31 pin 22 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC
III dashboard cable assembly (para 7-11).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

Change 2 2-408.13

TM 9-2320-365-20-1

NOTE

(10) Connect connector PX2 to LAMP TEST switch
connector.
(11) Install instrument panel assembly (para 7-15).
(12) Connect batteries (para 7-48).

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
connector PX2 socket 1.
(3) Connect negative (-) probe of multimeter to
known good ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 VDC is not present, repair wire 35
from splice E88 to connector J31 pin 22
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) If 24 VDC is present, repair wire 35 from
connector P31 socket 22 to connector P37
pin 2 (para 2-40) or replace engine control
cable assembly (para 7-72).
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Disconnect batteries (para 7-48)
(9) Connect connector P31 to connector J31.

Perform step (10) if vehicle is equipped
with LAMP TEST switch.

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO
9.

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

Is 24 VDC present at
connector J31 pin 22?

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

2-408.14 Change 2

TM 9-2320-365-20-1

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

If 24 VDC is not present, wire
35 from connector PX7 pin 12
to connector J31 pin 22 is
faulty. If 24 VDC is present,
wire 35 from connector P31
socket 22 to connector P37
pin 2 is faulty.

NO

YES

Repair wire 35 from connector PX7 pin 12 to
connector J31 pin 22 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or replace WTEC III dashboard cable assembly
(para 7-11).

Repair wire 35 from connector P31 socket
22 to connector P37 pin 2 (para 2-40) or replace
engine control cable assembly (para 7-72).

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 2 2-408.15

TM 9-2320-365-20-1

(1) Disconnect batteries (para 7-48).
(2) Disconnect connector J31 from connector
P31.
(3) Connect batteries (para 7-48).
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector J31 pin 22.
(6) Connect negative (-) probe of multimeter to
known good ground.
(7) Position master power switch to on and
note reading on multimeter.
(8) Is 24 VDC is not present, repair wire 35
from connector PX7 pin 12 to connector
J31 pin 22 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
replace WTEC III dashboard cable assembly
(para 7-11).
(9) If 24 VDC is present, repair wire 35 from
connector P31 socket 22 to connector P37
pin 2 (para 2-40) or replace engine control
cable assembly (para 7-72).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Disconnect batteries (para 7-48).
(12) Connect connect P31 to connector J31.
(13) Install instrument panel assembly (para 7-15).
(14) Connect batteries (para 7-48).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

NO

YES

10.

Is 24 VDC present at
connector PX2 socket 1?

e24A. HIGH ENGINE TEMPERATURE INDICATOR ILLUMINATES (CONT)

2-408.16 Change 2

TM 9-2320-365-20-1

Engine temperature is below
216°F (102°C) when high
engine temperature indicator
illuminates.
High engine temperature
indicator illuminates when
master power switch is
positioned to on.
Coolant temperature light
switch OK.
LAMP TEST switch OK (if
equipped).
Engine control cable
assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC II dashboard cable
assembly.
Faulty WTEC III dashboard
cable assembly.

Repair wire 35 from connector PX7 pin 12 to
splice E88 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC
III dashboard cable assembly (para 7-11).

Repair wire 35 from connector J31 pin 22
to splice E88 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para 7-11)

If 24 VDC is not present, wire
35 from connector PX7 pin 12
to splice E88 is faulty. If 24
VDC is present, wire 35 from
connector J31 pin 22 to splice
E88 is faulty.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

TM 9-2320-365-20-1

Change 2 2-409

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
connector PX2 socket 1.
(3) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 VDC is not present, repair wire 35
from connector PX7 pin 12 to splice E88
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) If 24 VDC is present, repair wire 35 from
connector J31 pin 22 to splice E88 (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11)
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Disconnect batteries (para 7-48)
(9) Connect connector P31 to connector J31.

NOTE

Perform step (10) if vehicle is equipped with
LAMP TEST switch.

(10) Connect connector PX2 to LAMP TEST switch
connector.
(11) Install instrument panel asssembly (para 7-15).
(12) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-410
2-410
2-410
2-410
2-410

1.

START

YES

This question eliminates
possible problems and
determines where
troubleshooting continues.

CTIS operates normally.

Faulty CTIS overspeed
indicator lamps.
Faulty lighted indicator
display.
Faulty dashboard cable
assembly.
Faulty relay K52.
Faulty CTIS cable
assembly.
Faulty CTIS ECU.

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
Is continuity present
between lighted indicator
display terminals 9 and 17?

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Go to step 7 of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-411
2-411
2-411
2-411
2-411

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 9.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 17 and
note reading on multimeter.
(7) If continuity is not present, go to step 7 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-412
2-412
2-412
2-412
2-412

YES

2.

YES

3.

Is continuity present
between connector PX7-17
and a known good ground?

If continuity is not
present, wire 3030 is
faulty.

Is continuity present
between relay K52
terminals 30 and 87A?

If continuity is not
present, relay K52 is
faulty.

NO

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

CTIS operates normally.
Lighted indicator
display OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K52.
Faulty CTIS ECU.
Faulty CTIS cable
assembly.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

CTIS operates normally.
Lighted indicator
display OK.

POSSIBLE PROBLEMS

Faulty relay K52.
Faulty dashboard cable
assembly.
Faulty CTIS ECU.
Faulty CTIS cable
assembly.

Repair wire 3030 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace relay K52
(para 7-9).

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-413
2-413
2-413
2-413
2-413

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7-17.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3030
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

(1) Remove PDP cover (para 16-2).
(2) Remove relay K52 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
relay K52 terminal 30.
(5) Connect negative (-) probe of multimeter to
relay K52 terminal 87A and note reading on
multimeter.
(6) If continuity is not present, replace relay K52
(para 7-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-414
2-414
2-414
2-414
2-414

4.

Is 24 vdc present at
relay K52 terminal 30?

YES

If 24 vdc is not present,
wire 1911 is faulty.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

CTIS operates normally.
Lighted indicator
display OK.
Relay K52 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty CTIS ECU.
Faulty CTIS cable
assembly.

This question eliminates
possible problems and
determines where
troubleshooting continues.

5.

Is 24 vdc present at
connector P110-S?

YES

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

CTIS operates normally.
Lighted indicator
display OK.
Relay K52 OK.

POSSIBLE PROBLEMS

Faulty CTIS ECU.
Faulty dashboard cable
assembly.
Faulty CTIS cable
assembly.

Repair wire 1911 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Go to step 8 of this fault.

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-415
2-415
2-415
2-415
2-415

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Connect batteries (para 7-48).
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
PDP, terminal 30, where relay K52 was
removed.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, repair wire 1911
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Install relay K52 in PDP.
(9) Install PDP cover (para 16-2).

(1) Disconnect connector P110 from CTIS ECU.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P110-S.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, go to step 8 of
this fault.
(7) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-416
2-416
2-416
2-416
2-416

YES

6.

Is continuity present
between connector P110-E
and connector PX7-9?
If continuity is present,
CTIS ECU is faulty.

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

CTIS operates normally.
Lighted indicator
display OK.
Relay K52 OK.

POSSIBLE PROBLEMS

Faulty CTIS ECU.
Faulty CTIS cable
assembly.
Faulty dashboard cable
assembly.

Go to step 9 of this fault.

Replace CTIS ECU
(para 12-6).

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-417
2-417
2-417
2-417
2-417

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-E.
(3) Connect negative (-) probe of multimeter to
connector PX7-9 and note reading on
multimeter.
(4) If continuity is not present, go to step 9 of
this fault.
(5) If continuity is present, replace CTIS ECU
(para 12-6).
(6) Connect lighted indicator display to connector
PX7.
(7) Position lighted indicator display in
instrument panel assembly with four screws.
(8) Tighten four screws to 6-10 lb-in. (1 N·m).
(9) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-418
2-418
2-418
2-418
2-418

YES

Is continuity present
through CTIS overspeed
indicator lamps?

7.

NO

If continuity is not
present, CTIS overspeed
indicator lamps are
faulty. If continuity is
present, lighted indicator
display is faulty.

CTIS operates normally.
Relay K52 OK.
Dashboard cable
assembly OK.
CTIS cable assembly OK.
CTIS ECU OK.

Faulty CTIS overspeed
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace CTIS overspeed
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-419
2-419
2-419
2-419
2-419

CONTINUITY TEST

(1) Loosen four captive screws in lamp
mounting panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove CTIS overspeed indicator lamps
from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each CTIS overspeed
indicator lamp and note reading on multimeter.
(6) If continuity is not present, replace lamps
(para 7-16).
(7) If continuity is present, replace lighted indicator
display (para 7-16).
(8) Install CTIS overspeed indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-420
2-420
2-420
2-420
2-420

YES

8.

Is continuity present
between connector P110-S
and connector P111-G?
If continuity is not present,
CTIS cable assembly is
faulty. If continuity is
present, wire 1911 is
faulty.
NO

CTIS operates normally.
Relay K52 OK.
Lighted indicator display OK.

Faulty CTIS cable
assembly.
Faulty dashboard cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace CTIS cable
assembly (para 7-53).

Repair wire 1911 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-421
2-421
2-421
2-421
2-421

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector P111 from connector
J111.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter to
connector P110-S.
(8) Connect negative (-) probe of multimeter to
connector P111-G and note reading on
multimeter.
(9) If continuity is not present, replace CTIS cable
assembly (para 7-53).
(10) If continuity is present, repair wire 1911
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(11) Connect connector P111 to connector J111.
(12) Install PDP on dashboard with three screws.
(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).
(15) Connect lighted indicator display to connector
PX7.
(16) Position lighted indicator display in instrument
panel assembly with four screws.
(17) Tighten four screws to 6-10 lb-in. (1 N·m).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-422
2-422
2-422
2-422
2-422

YES

9.

Is continuity present
between connector P110-E
and connector P111-D?
If continuity is not present,
CTIS cable assembly is
faulty. If continuity is
present, wire 1528 is
faulty.

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

CTIS operates normally.
Relay K52 OK.
Lighted indicator
display OK.

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty dashboard cable
assembly.

Replace CTIS cable
assembly (para 7-53).

Repair wire 1528 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)
e25. CTIS OVERSPEED INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-423
2-423
2-423
2-423
2-423

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector P111 from connector
J111.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter to
connector P110-E.
(8) Connect negative (-) probe of multimeter to
connector P111-D and note reading on
multimeter.
(9) If continuity is not present, replace CTIS cable
assembly (para 7-53).
(10) If continuity is present, repair wire 1528
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(11) Connect connector P111 to connector J111.
(12) Install PDP on dashboard with three screws.
(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).
(15) Connect connector P110 to CTIS ECU.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-424
2-424
2-424
2-424
2-424

1.

START

YES

Chemical alarm operates.

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

Faulty dashboard cable
assembly.
Faulty chemical detector
indictor lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Is continuity present
between lighted indicator
display terminals 2
and 17?

e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Go to step 3 of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-425
2-425
2-425
2-425
2-425

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 2.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 17 and
note reading on multimeter.
(7) If continuity is not present, go to step 3 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-426
2-426
2-426
2-426
2-426

YES

2.

Is continuity present
between connector PX7-17
and a known good ground?
If continuity is not present,
wire 3030 is faulty. If
continuity is present,
wire 1803 is faulty.

NO

Faulty dashboard cable
assembly.

Chemical alarm operates.
Lighted indicator display OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

3.

Is continuity present
through chemical detector
indicator lamps?
If continuity is not present,
chemical detector indicator
lamps are faulty. If
continuity is present,
lighted indicator display is
faulty.
NO

Chemical alarm operates.
Dashboard cable
assembly OK.

Faulty chemical detector
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 3030 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1803 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace chemical detector
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE (CONT)
e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE (CONT)
e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE (CONT)
e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE (CONT)
e26. CHEMICAL DETECTOR INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-427
2-427
2-427
2-427
2-427

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7-17.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3030
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(5) If continuity is present, repair wire 1803
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(6) Connect lighted indicator display to
connector PX7.
(7) Position lighted indicator display in
instrument panel assembly with four
screws.
(8) Tighten four screws to 6-10 lb-in. (1 N·m).
(9) Connect batteries (para 7-48).

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove chemical detector indicator lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each chemical detector
indicator lamp and note reading on multimeter.
(6) If continuity is not present, replace lamps
(para 7-16).
(7) If continuity is present, replace lighted indicator
display (para 7-16).
(8) Install chemical detector indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-428
2-428
2-428
2-428
2-428

1.

START

YES

High beam indicator
operates.
Left turn signal operates.
Is voltage pulse present
at connector PX7-6?
If voltage pulse is not
present, wire 1570 is
faulty.

WARNING
Read WARNING
on following page.

NO

Faulty dashboard cable
assembly.
Faulty left turn signal
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Repair wire 1570 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-429
2-429
2-429
2-429
2-429

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Connect batteries (para 7-48).
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
connector PX7-6.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(10) Position turn signal to left turn signal position
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If voltage pulse is not present, repair wire 1570
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(12) Position master power switch to off
(TM 9-2320-365-10).
(13) Position main light switch to OFF
(TM 9-2320-365-10).
(14) Position turn signal switch to middle position
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-430
2-430
2-430
2-430
2-430

YES

2.

Is continuity present
through left turn signal
indicator lamps?

NO

If continuity is not present,
left turn signal indicator
lamps are faulty. If
continuity is present,
lighted indicator display
is faulty.

High beam indicator
operates.
Left turn signal operates.
Dashboard cable
assembly OK.

Faulty left turn signal
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace left turn signal indicator
lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e27. LEFT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-431
2-431
2-431
2-431
2-431

CONTINUITY TEST

(14) Tighten four screws to 6-10 lb-in. (1 N·m).

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove left turn signal indicator lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each left turn signal
indicator lamp and note reading on
multimeter.
(6) If continuity is not present, replace lamps
(para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install left turn signal indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Disconnect batteries (para 7-48).
(12) Connect lighted indicator display to connector
PX7.
(13) Position lighted indicator display in instrument
panel assembly with four screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-432
2-432
2-432
2-432
2-432

1.

START

YES

High beam indicator
operates.
Right turn signal operates.
Is voltage pulse present at
connector PX7-4?
If voltage pulse is not
present, wire 1580 is
faulty.

WARNING
Read WARNING
on following page.

NO

Faulty dashboard cable
assembly.
Faulty right turn signal
indicator lamps.
Faulty lighted indicator
display.

Go to step 3 of this fault.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-433
2-433
2-433
2-433
2-433

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Connect batteries (para 7-48).
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
connector PX7-4.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(10) Position right signal to right turn signal position
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If voltage pulse is not present, go to step 3
of this fault.
(12) Position master power switch to off
(TM 9-2320-365-10).
(13) Position main light switch to OFF
(TM 9-2320-365-10).
(14) Position turn signal control to middle position
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-434
2-434
2-434
2-434
2-434

YES

2.

Is continuity present
through right turn signal
indicator lamps?

NO

If continuity is not present,
right turn signal indicator
lamps are faulty. If
continuity is present,
lighted indicator display
is faulty.

High beam indicator
operates.
Right turn signal operates.
Dashboard cable
assembly OK.

Faulty right turn signal
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace right turn signal
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-435
2-435
2-435
2-435
2-435

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove right turn signal indicator lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each right turn signal
indicator lamp and note reading on multimeter.
(6) If continuity is not present, replace lamps
(para 7-16).
(7) If continuity is present, replace lighted indicator
display (para 7-16).
(8) Install right turn signal indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Disconnect batteries (para 7-48).
(12) Connect lighted indicator display to connector
PX7.
(13) Position lighted indicator display in instrument
panel assembly with four screws.
(14) Tighten four screws to 6-10 lb-in. (1 N·m).
(15) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-436
2-436
2-436
2-436
2-436

YES

NO

High beam indicator
operates.
Right turn signal operates.
Lighted indicator
display OK.

3.

Is continuity present
from TB1 position 41
to TB1 position 42?

Faulty dashboard cable
assembly.

If continuity is not present,
wire 1580 from TB1
position 41 to TB1 position
42 is faulty. If continuity is
present, wire 1580 in
dashboard cable assembly
is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1580 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1580 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)
e28. RIGHT TURN SIGNAL INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-437
2-437
2-437
2-437
2-437

CONTINUITY TEST
(1) Disconnect batteries (para 7-48).
(2) Remove PDP cover (para 16-2).
(3) Remove three screws and washers from PDP.
(4) Remove three screws from PDP.
(5) Lift PDP outward to gain access.
(6) Connect positive (+) probe of multimeter to
TB1 position 41.
(7) Connect negative (-) probe of multimeter to
TB1 position 42 and note reading on
multimeter.
(8) If continuity is not present, repair wire 1580
from TB1 position 41 to TB1 position 42
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If continuity is present, repair wire 1580 in
dashboard cable assembly (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(10) Install PDP on dashboard with three screws.
(11) Install three washers and screws in PDP.
(12) Install PDP cover (para 16-2).
(13) Connect lighted indicator display to connector
PX7.
(14) Position lighted indicator display in instrument
panel assembly with four screws.
(15) Tighten four screws to 6-10 lb-in. (1 N·m).
(16) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-438
2-438
2-438
2-438
2-438

1.

START

YES

Is continuity present
between connector PX7-7
and a known good ground?

Headlight high beams
operate.

NO

Faulty dashboard cable
assembly.
Faulty lighted indicator
display.

If continuity is not
present, wire 3021 is
faulty. If continuity is
present, lighted
indicator display is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e29. TURN SIGNAL INDICATORS AND HIGH BEAMS ON INDICATOR DO NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Repair wire 3021 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace lighted indicator
display (para 7-16).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-439
2-439
2-439
2-439
2-439

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX7-7.
(6) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(7) If continuity is not present, repair wire 3021
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) If continuity is present, replace lighted
indicator display (para 7-16).
(9) Connect lighted indicator display to connector
PX7.
(10) Position lighted indicator display in instrument
panel assembly with four screws.
(11) Tighten four screws to 6-10 lb-in. (1 N·m).
(12) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-440
2-440
2-440
2-440
2-440

1.

START

YES

If continuity is present,
wire 1681 is faulty.

Turn signal indicators
operate.
Headlight high beams
operate.

NO

Faulty dashboard cable
assembly.
Faulty high beam
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Is continuity present
between lighted indicator
display terminals
7 and 24?

e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Go to step 2 of this fault.

Repair wire 1681 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-441
2-441
2-441
2-441
2-441

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 7.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 24 and
note reading on multimeter.
(7) If continuity is present, repair wire 1681
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-442
2-442
2-442
2-442
2-442

YES

2.

Is continuity present
through high beam
indicator lamps?

NO

If continuity is not present,
high beam indicator lamps
are faulty. If continuity
is present, lighted
indicator display is faulty.

Turn signal indicators
operate.
Headlight high beams
operate.
Dashboard cable
assembly OK.

Faulty high beam
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace high beam
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE (CONT)
e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE (CONT)
e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE (CONT)
e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE (CONT)
e30. HIGH BEAMS ON INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-443
2-443
2-443
2-443
2-443

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove high beam indicator lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each high beam
indicator lamp and note reading on
multimeter.
(6) If continuity is not present, replace lamps
(para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install high beam indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICR-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

Materials/Parts
Wire, Elect., 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

1.
KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION
Parking brake operates.
Circuit breaker CB77 OK.

POSSIBLE PROBLEMS

Faulty front light cable
assembly.
Faulty low pressure
transmitter.
Faulty emergency brake
indicator lamps.
Faulty dashboard cable
assembly.
Faulty parking brake indicator
lamps.
Faulty lighted indicator display.

Does either emergency
brake indicator or parking
brake indicator illuminate?

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 7 of this fault.
YES

NO

TM 9-2320-365-20-1

2-444 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB77 prior to beginning this task.

START

NOTE

(1) Start engine (TM 9-2320-365-10).
(2) Visually check lighted indicator display.
(3) If emergency brake and parking brake
indicator lights both do not illuminate, go
to step 7 of this fault.

TM 9-2320-365-20-1

Change 1 2-445

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

2.

NO

YES
Go to step 5 of this fault.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

NO

Go to step 4 of this fault.
YES

CAUTION
Read CAUTION
on following page.
3.

Repair wire 1616 from connector PX7
pin 22 to splice E2 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

This question eliminates
possible problems and
determines where
troubleshooting continues.

Parking brake operates.
Circuit breaker CB77 OK.
Front lights cable assembly
OK.
Low pressure transmitter OK.

POSSIBLE PROBLEMS

Faulty emergency brake
indicator lamps.
Faulty dashboard cable
assembly.
Faulty parking brake indicator
lamps.
Faulty lighted indicator display.

Does emergency brake
indicator illuminate?

If continuity is present, wire
1616 is faulty.

Is continuity present from
lighted indicator display
socket 27 to socket 22?

Parking brake operates.
Circuit breaker CB77 OK.
Front lights cable assembly
OK.
Low pressure transmitter OK.
Emergency brake indicator
lamps OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty parking brake indicator
lamps.
Faulty lighted indicator display.

2-446 Change 1

TM 9-2320-365-20-1

CONTINUITY TEST

(1) Visually check lighted indicator display.
(2) If emergency brake indicator does not
illuminate, go to step 5 of this fault.
(3) Shut down engine (TM 9-2320-365-10).

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Remove four screws from lighted
indicator display.
(3) Remove lighted indicator display from
instrument panel assembly.
(4) Disconnect connector PX7 from lighted
indicator display.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
lighted indicator display socket 27.
(7) Connect negative (-) probe of multimeter to
lighted indicator display socket 22 and note
reading on multimeter.
(8) If continuity is not present, go to step 4 of
this fault.
(9) If continuity is present, repair wire 1616
from connector PX7 pin 22 to splice E2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Change 1 2-447

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

4.

NO

YES

Replace lighted indicator
display (para 7-16).

Replace parking brake
indicator lamps (para 7-16).

Faulty parking brake indicator
lamps.
Faulty lighted indicator display.

POSSIBLE PROBLEMS

Parking brake operates.
Circuit breaker CB77 OK.
Front lights cable assembly
OK.
Low pressure transmitter OK.
Emergency brake indicator
lamps OK.
Dashboard cable assembly OK.

Is continuity present
through both parking brake
indicator lamps?

2-448 Change 1

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

TM 9-2320-365-20-1

If continuity is not present,
parking brake indicator lamps
are faulty. If continuity is
present, lighted indicator
display is faulty.

CONTINUITY TEST

(1) Loosen four captive screws in lamp
mounting panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove parking brake indicator lamps from
printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each parking
brake indicator lamp and note reading on
multimeter.
(6) If continuity is not present in both lamps,
replace lamps (para 7-16).
(7) If continuity is present in either lamp,
replace lighted indicator display
(para 7-16).
(8) Install parking brake indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Connect lighted indicator display to
connector PX7.
(12) Position lighted indicator display in
instrument panel assembly with four
screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

Change 1 2-449

TM 9-2320-365-20-1

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.
5.

YES
Go to step 6 of this fault.

Repair wire 1616 from connector PX7
pin 11 to splice E2 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

Is continuity present from
lighted indicator display
socket 27 to socket 11?

POSSIBLE PROBLEMS

Parking brake operates.
Circuit breaker CB77 OK.
Front lights cable assembly
OK.
Low pressure transmitter OK.
Parking brake indicator lamps
OK.

If continuity is present, wire
1616 is faulty.

NO

Faulty dashboard cable
assembly.
Faulty emergency brake
indicator lamps.
Faulty lighted indicator display.

TM 9-2320-365-20-1

2-450 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove four screws from lighted indicator
display.
(3) Remove lighted indicator display from
instrument panel assembly.
(4) Disconnect connector PX7 from lighted
indicator display.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
lighted indicator display socket 27.
(7) Connect negative (-) probe of multimeter to
lighted indicator display socket 11 and note
reading on multimeter.
(8) If continuity is not present, go to step 6 of
this fault.
(9) If continuity is present, repair wire 1616
from connector PX7 pin 11 to splice E2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-451

TM 9-2320-365-20-1

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

6.

Replace lighted indicator
display (para 7-16).

Replace emergency brake
indicator lamps (para 7-16).
YES

Is continuity present
through both emergency
brake indicator lamps?

Faulty emergency brake
indicator lamps.
Faulty lighted indicator display.

POSSIBLE PROBLEMS

Parking brake operates.
Circuit breaker CB77 OK.
Front lights cable assembly
OK.
Low pressure transmitter OK.
Parking brake indicator lamps
OK.
Dashboard cable assembly OK.

If continuity is not present,
emergency brake indicator
lamps are fautly. If continuity
is present, lighted indicator
display is faulty.

NO

2-452 Change 1

TM 9-2320-365-20-1

CONTINUITY TEST

(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

(1) Loosen four captive screws in lamp
mounting panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove emergency brake indicator lamps
from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each emergency
brake indicator lamp and note reading on
multimeter.
(6) If continuity is not present in both lamps,
replace lamps (para 7-16).
(7) If continuity is present in either lamp,
replace lighted indicator display
(para 7-16).
(8) Install emergency brake indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Connect lighted indicator display to
connector PX7.
(12) Position lighted indicator display in
instrument panel assembly with four
screws.

TM 9-2320-365-20-1

Change 1 2-453

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

NO

YES

CAUTION
Read CAUTION
on following page.
7.

Replace lighted indicator
display (para 7-16).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

NO

YES

CAUTION
Read CAUTION
on following page.
8.

POSSIBLE PROBLEMS

Repair wire 1616 from splice E2 to
connector J27 socket 16 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

Is continuity present from
connector PX7 pin 22 to
connector J27 socket 16?

Parking brake operates.
Circuit breaker CB77 OK.
Parking brake indicator lamps
OK.
Emergency brake indicator
lamps OK.
Lighted indicator display OK.

Parking brake operates.
Circuit breaker CB77 OK.
Parking brake indicator lamps
OK.
Emergency brake indicator
lamps OK.

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

Is continuity present from
lighted indicator display
socket 27 to socket 22?
If continuity is not present,
lighted indicator display is
faulty.

Faulty lighted indicator display.
Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty low pressure
transmitter.

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty low pressure
transmitter.

If continuity is not present,
wire 1616 is faulty.

TM 9-2320-365-20-1

2-454 Change 1

CAUTION

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove four screws from lighted
indicator display.
(3) Remove lighted indicator display from
instrument panel assembly.
(4) Disconnect connector PX7 from lighted
indicator display.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to lighted indicator display socket 27.
(7) Connect negative (-) probe of multimeter
to lighted indicator display socket 22
and note reading on multimeter.
(8) If continuity is not present, go to step 4
of this faulty.
(9) If continuity is not present, replace
lighted indicator display (para 7-16).

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector
P27.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to connector PX7 pin 22.
(8) Connect negative (-) probe of multimeter
to connector J27 socket 16 and note
reading on multimeter.
(9) If continuity is not present, repair wire
1616 from splice E2 to connector J27
socket 16 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

Change 1 2-455

TM 9-2320-365-20-1

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

KNOWN INFO

POSSIBLE PROBLEMS

9.

CAUTION
Read CAUTION
on following page.

YES

NO

Repair wire 1616 from connector
P27 pin 16 to terminal lug TL202
(para 2-40) or replace front lights cable
assembly (para 7-74).

Parking brake operates.
Circuit breaker CB77 OK.
Parking brake indicator lamps
OK.
Emergency brake indicator
lamps OK.
Lighted indicator display OK.
Dashboard cable assembly OK.

Is continuity present from
connector P27 pin 16 to
terminal lug TL202?
If continuity is not present,
wire 1616 is faulty.

Faulty front lights cable
assembly.
Faulty low pressure
transmitter.

TM 9-2320-365-20-1

2-456 Change 1

CONTINUITY TEST

(1) Remove two screws and washers from
front grille.
(2) Remove screw and washer from front
grille.
(3) Remove front grille from cab.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector P27 pin 16.
(6) Connect negative (-) probe of multimeter
to terminal lug TL202 and note reading on
multimeter.
(7) If continuity is not present, repair wire
1616 from connector P27 pin 16 to
terminal lug TL202 (para 2-40) or replace
front lights cable assembly (para 7-74).
(8) Connect connector P27 to connector J27.
(9) Connect lighted indicator display to
connector PX7.
(10) Position lighted indicator display in
instrument panel assembly with four
screws.
(11) Tighten four screws to 6-10 lb-in. (1 N·m).
(12) Connect batteries (para 7-48).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-457

TM 9-2320-365-20-1

e31. PARKING BRAKE INDICATOR AND/OR EMERGENCY BRAKE INDICATOR DOES NOT
ILLUMINATE (CONT)

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

KNOWN INFO

POSSIBLE PROBLEMS

YES

NO

10.

Repair wire 1616 from terminal lug
TL201 to terminal lug TL126 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace low pressure
transmitter (para 11-28).

Parking brake operates.
Circuit breaker CB77 OK.
Parking brake indicator lamps
OK.
Emergency brake indicator
lamps OK.
Lighted indicator display OK.
Dashboard cable assembly OK.

Is continuity present from
terminal lug TL201 to a
known good ground?

Faulty front lights cable
assembly.
Faulty low pressure
transmitter.

If continuity is not present,
wire 3024 is faulty. If
continuity is present, low
pressure transmitter is faulty.

TM 9-2320-365-20-1

2-458 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug TL201.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3024 from terminal lug TL201 to terminal
lug TL126 (para 2-40) or replace front
lights cable assembly (para 7-74).
(5) If continuity is present, replace low
pressure transmitter (para 11-28).
(6) Position front grille on cab with washer
and screw.
(7) Position two washers and screws in front
grille.
(8) Tighten screw to 48-60 lb-in. (5-7 N·m).
(9) Tighten two screws to 24 lb-in. (3 N·m).
(10) Install PDP in dashboard with three
screws.
(11) Install three washers and screws in PDP.
(12) Install PDP cover (para 16-2).

Change 1 2-459

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-460
2-460
2-460
2-460
2-460

YES

1.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other indicator lamps
operate.
Hydraulic components
operate normally.

START

NO

Faulty lighted indicator
display.
Faulty lamps.
Faulty dashboard cable
assembly.
Faulty PTO.
Faulty auxiliary panel
cable assembly.
Faulty PTO cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Is continuity present
between lighted indicator
display terminals 10
and 27?

e32. PTO INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Go to step 4 of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-461
2-461
2-461
2-461
2-461

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 10 and
note reading on multimeter.
(7) If continuity is not present, go to step 4 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-462
2-462
2-462
2-462
2-462

2.

Is continuity present
between connector PX7-10
and connector P216-B?
If continuity is not present,
wire 2021 is faulty.

YES

NO

Go to step 5 of this fault.

Other indicator lights
operate.
Hydraulic components
operate normally.
Lighted indicator
display OK.
Lamps OK.

Faulty dashboard cable
assembly.
Faulty PTO.
Faulty auxiliary panel
cable assembly.
Faulty PTO cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION

e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-463
2-463
2-463
2-463
2-463

CONTINUITY TEST

(1) Disconnect connector P216 from connector J216.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX7-10.
(4) Connect negative (-) probe of multimeter to
connector P216-B and note reading on
multimeter.
(5) If continuity is not present, go to step 5 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-464
2-464
2-464
2-464
2-464

YES

3.

Is continuity present
between connector J216
terminals A and B?

NO

Other indicator lights
operate.
Hydraulic components
operate normally.
Lighted Indicator
display OK.
Lamps OK.
Dashboard cable
assembly OK.
Auxiliary panel cable
assembly OK.

Faulty PTO.
Faulty PTO cable
assembly.

If continuity is not present,
PTO is faulty. If continuity
is present, wire 3025 is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Notify DS Maintenance.

Repair wire 3025 (para 2-40)
or replace PTO cable
assembly (para 7-77).

e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-465
2-465
2-465
2-465
2-465

CONTINUITY TEST

(1) Connect lighted indicator display to connector
PX7.
(2) Position lighted indicator display in instrument
panel assembly with four screws.
(3) Tighten four screws to 6-10 lb-in. (1 N·m).
(4) Connect batteries (para 7-48).
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector J216-B.
(7) Connect negative (-) probe of multimeter to
connector J216-A.
(8) Start engine (TM 9-2320-365-10).
(9) Position PTO switch to on (TM 9-2320-365-10)
and note reading on multimeter.
(10) If continuity is not present, notify DS
Maintenance.
(11) If continuity is present, repair wire 3025
(para 2-40) or replace PTO cable assembly
(para 7-77).
(12) Position PTO switch to off (TM 9-2320-365-10).
(13) Shut down engine (TM 9-2320-365-10).
(14) Connect connector P216 to connector J216.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-466
2-466
2-466
2-466
2-466

YES

4.

Is continuity present
through PTO indicator
lamps?

NO

Other indicator lights
operate.
Hydraulic components
operate normally.
Dashboard cable
assembly OK.
PTO OK.
Auxiliary panel cable
assembly OK.
PTO cable assembly OK.

Faulty lighted indicator
display.
Faulty lamps.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

If continuity is not present,
PTO indicator lamps are
faulty. If continuity is
present, lighted indicator
display is faulty.

Replace PTO indicator
lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-467
2-467
2-467
2-467
2-467

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove PTO indicator lamps from printed
circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each indicator lamp
and note reading on multimeter.
(6) If continuity is not present, replace PTO
indicator lamps (para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install PTO indicator lamps in printed
circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-468
2-468
2-468
2-468
2-468

YES

5.
Other indicator lights
operate.
Hydraulic components
operate normally.
PTO OK.

Faulty dashboard cable
assembly.
Faulty auxiliary panel
cable assembly.
Faulty PTO cable
assembly.

If continuity is not present,
wire 2021 is faulty.

Is continuity present
from connector PX7-10
to connector J913-13?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 2021 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

NO

e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-469
2-469
2-469
2-469
2-469

CONTINUITY TEST

(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector P913 from connector
J913.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
PX7-10.
(5) Connect negative (-) probe of multimeter to
J913-13 and note reading on multimeter.
(6) If continuity is not present, repair wire 2021
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Connect lighted indicator display to connector
PX7.
(8) Position lighted indicator display in instrument
panel assembly with four screws.
(9) Tighten four screws to 6-10 lb-in. (1 N·m).
(10) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-470
2-470
2-470
2-470
2-470

YES

NO

6.

Is continuity present
from connector P913-13
to connector J210-6?
If continuity is not present,
wire 2021 is faulty.

Other indicator lights
operate.
Hydraulic components
operate normally.
PTO OK.
Dashboard cable
assembly OK.

Faulty auxiliary panel
cable assembly.
Faulty PTO cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 2021 (para 2-40)
or replace PTO cable
assembly (para 7-77).

Repair wire 2021 (para 2-40) or
replace auxiliary panel cable
assembly (all models except
M1079 w/o winch) (para 7-49) or
M1079 w/o winch auxiliary panel
cable assembly (para 7-50).

e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)
e32. PTO INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-471
2-471
2-471
2-471
2-471

CONTINUITY TEST

(1) Disconnect connector P210 from connector
J210.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
J210-6.
(4) Connect negative (-) probe of multimeter to
P913-13 and note reading on multimeter.
(5) If continuity is not present, repair wire 2021
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o winch)
(para 7-49) or M1079 w/o winch auxiliary panel
cable assembly (para 7-50).
(6) If continuity is present, repair wire 2021
(para 2-40) or replace PTO cable assembly
(para 7-77).
(7) Connect connector J210 to connector P210.
(8) Connect connector P913 to connector J913.
(9) Install personnel heater (para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-472
2-472
2-472
2-472
2-472

1.

START

YES

Other indicator lights
operate.

This step eliminates
possible problems and
determines where
troubleshooting continues.

NO

Is continuity present
between lighted indicator
display terminals 26 and 27?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e33. FAN OFF INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Go to step 2 of this fault.

Go to step 3 of of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

Faulty fan off indicator
lamps.
Faulty lighted indicator
display.
Faulty dashboard cable
assembly.
Faulty radiator fan off
switch.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-473
2-473
2-473
2-473
2-473

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 26 and
note reading on multimeter.
(7) If continuity is not present, go to step 2 of
this fault.
(8) If continuity is present, go to step 3 of this
fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-474
2-474
2-474
2-474
2-474

YES

2.

Is continuity present
through fan off indicator
lamps?

NO

If continuity is not present,
fan off indicator lamps are
faulty. If continuity is
present, lighted indicator
display is faulty.
Faulty fan off indicator
lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace fan off indicator
lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

Other indicator lights
operate.
Dashboard cable
assembly OK.
Radiator fan off
switch OK.

e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-475
2-475
2-475
2-475
2-475

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove fan off indicator lamps from printed
circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each fan off indicator
lamp and note reading on multimeter.
(6) If continuity is not present, replace fan off
indicator lamps (para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install fan off indicator lamps in printed
circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-476
2-476
2-476
2-476
2-476

YES

3.

Is continuity present
between connector PX7-26
and connector PX1-6?
If continuity is not
present, wire 1814 is
faulty.

NO

Other indicator lights
operate.
Lighted indicator
display OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

4.

NO

Other indicator lights
operate.
Fan off indicator lamps OK.
Lighted indicator
display OK.

Is continuity present
between connector PX1-2
and a known good ground?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1814 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3023 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Faulty dashboard cable
assembly.
Faulty radiator fan off
switch.

Faulty dashboard cable
assembly.
Faulty radiator fan off
switch.

Replace radiator fan off
switch (para 7-18).

If continuity is not
present, wire 3023 is
faulty. If continuity is
present, radiator fan off
fording switch is faulty.

e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)
e33. FAN OFF INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-477
2-477
2-477
2-477
2-477

CONTINUITY TEST

CONTINUITY TEST

(9) Position lighted indicator display in instrument
panel assembly with four screws.
(10) Tighten four screws to 6-10 lb-in. (1 N·m).
(11) Connect batteries (para 7-48).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX1 from radiator fan off
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX7-26.
(5) Connect negative (-) probe of multimeter to
connector PX1-6 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1814
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX1-2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3023
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(5) If continuity is present, replace radiator fan
off switch (para 7-18).
(6) Connect connector PX1 to radiator fan off
switch.
(7) Install instrument panel assembly (para 7-15).
(8) Connect lighted indicator display to connector
PX7.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-478
2-478
2-478
2-478
2-478

1.

START

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other indicator lights
operate.

YES
Go to step 4 of this fault.

NO

KNOWN INFO

POSSIBLE PROBLEMS
Is continuity present
between lighted indicator
display terminals 20
and 27?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Faulty lighted indicator
display.
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II cab
transmission harness.
Faulty WTEC II
Transmission ECU
Pushbutton Shift Selector
(TEPSS).
Faulty transmission
temperature indicator
lamps.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-479
2-479
2-479
2-479
2-479

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 20 and
note reading on multimeter.
(7) If continuity is not present, go to step 4 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-480
2-480
2-480
2-480
2-480

YES

2.

If continuity is not
present, wire 1537
is faulty.

NO

Other indicator lights
operate.
Lighted indicator
display OK.

Is continuity present
between connector PX7-20
and connector P118-1?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1537 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10).

Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II cab
transmission harness.
Faulty WTEC II TEPSS.

e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-481
2-481
2-481
2-481
2-481

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX17 from master
power switch.
(3) Disconnect connector J118 from connector
P118.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX7-20.
(6) Connect negative (-) probe of multimeter to
connector P118-1 and note reading on
multimeter.
(7) If continuity is not present, repair wire 1537
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-482
2-482
2-482
2-482
2-482

YES

3.

NO

Is continuity present
between connector
J118-1 and connector
J114-5?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Other indicator lights
operate.
Lighted indicator
display OK.
WTEC II dashboard cable
assembly OK.

Repair wire 105 (para 2-40)
or replace WTEC II cab
transmission harness (para 7-86).

Replace WTEC II
TEPSS (para 8-2).

If continuity is not present,
wire 105 is faulty. If
continuity is present,
WTEC II TEPSS is faulty.

Faulty WTEC II cab
transmisison harness.
Faulty WTEC II TEPSS.

e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-483
2-483
2-483
2-483
2-483

CONTINUITY TEST

(1) Disconnect connector J114 (bottom
connector) from WTEC II TEPSS.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J114-5.
(4) Connect negative (-) probe of multimeter to
connector J118-1 and note reading on
multimeter.
(5) If continuity is not present, repair wire 105
(para 2-40) or replace WTEC II cab transmission
harness (para 7-86).
(6) If continuity is present, replace WTEC II
TEPSS (para 8-2).
(7) Connect connector J114 to WTEC II TEPSS.
(8) Connect connector J118 to connector P118.
(9) Install instrument panel assembly (para 7-15).
(10) Connect lighted indicator display to connector
PX7.
(11) Position lighted indicator display in instrument
panel assembly with four screws.
(12) Tighten four screws to 6-10 lb-in. (1 N·m).
(13) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-484
2-484
2-484
2-484
2-484

YES

4.

Is continuity present
through transmission
temperature indicator
lamps?

NO

If continuity is not
present, transmission
temperature indicator
lamps are faulty. If
continuity is present,
lighted indicator display
is faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace transmission temperature
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

Other indicator lights
operate.
WTEC II dashboard cable
assembly OK.
WTEC II cab transmission
harness OK.
WTEC II TEPSS OK.

POSSIBLE PROBLEMS

Faulty transmission
temperature indicator
lamps.
Faulty lighted indicator
display.

e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e34. WTEC II TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-485
2-485
2-485
2-485
2-485

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove transmission temperature indicator
lamps from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each transmission
temperature indicator lamp and note reading
on multimeter.
(6) If continuity is not present, replace transmission
temperature indicator lamps (para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install transmission temperature indicator
lamps in printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-486
2-486
2-486
2-486
2-486

1.

START

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other indicator lights
operate.

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty lighted indicator
display.
Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III
transmission ECU.
Faulty transmission
temperature indicator
lamps.

Is continuity present
from lighted indicator
display terminals 20 to
27?

e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

Go to step 3 of this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-487
2-487
2-487
2-487
2-487

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 20 and
note reading on multimeter.
(7) If continuity is not present, go to step 3 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-488
2-488
2-488
2-488
2-488

YES

2.

NO

Other indicator lights
operate.
Lighted indicator
display OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III
transmission ECU.

If continuity is not present,
wire 105 is faulty.

Is continuity present
from connector PX7-20
to connector P115-19?

Repair wire 105 (para 2-40)
or replace WTEC III dashboard
cable assembly (para 7-11).

Replace WTEC III
transmission ECU
(para 8-7).

e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-489
2-489
2-489
2-489
2-489

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector clamp from connector
P115.
(3) Disconnect connector P115 from WTEC III
transmission ECU.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX7-20.
(6) Connect negative (-) probe of multimeter to
connector P115-19 and note reading on
multimeter.
(7) If continuity is not present, repair wire 105
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(8) If continuity is present, replace WTEC III
transmission ECU (para 8-7).
(9) Connect connector P115 to WTEC III
transmission ECU.
(10) Connect connector clamp to connector P115.
(11) Install kick panel (para 16-3).
(12) Connect lighted indicator display to connector
PX7.
(13) Position lighted indicator display in instrument
panel assembly with four screws.
(14) Tighten four screws to 6-10 lb-in. (1 N·m).
(15) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-490
2-490
2-490
2-490
2-490

YES

Is continuity present
through transmission
temperature indicator
lamps?

NO

If continuity is not
present, transmission
temperature indicator
lamps are faulty. If
continuity is present,
lighted indicator display
is faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

3.
Other indicator lights
operate.
WTEC III dashboard cable
assembly OK.
WTEC III transmission
ECU OK.

POSSIBLE PROBLEMS

Faulty transmission
temperature indicator
lamps.
Faulty lighted indicator
display.

Replace transmission temperature
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)
e35. WTEC III TRANSMISSION TEMPERATURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-491
2-491
2-491
2-491
2-491

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from instrument
panel assembly.
(3) Disconnect connector PX7 from lighted indicator
display.
(4) Loosen four captive screws in lamp mounting
panel.
(5) Remove lamp mounting panel from lighted
indicator display housing.
(6) Remove transmission temperature indicator
lamps from printed circuit board.
(7) Set multimeter to ohms.
(8) Check continuity through each transmission
temperature indicator lamp and note reading
on multimeter.
(9) If continuity is not present, replace transmission
temperature indicator lamps (para 7-16).
(10) If continuity is present, replace lighted
indicator display (para 7-16).
(11) Install transmission temperature indicator
lamps in printed circuit board.
(12) Install lamp mounting panel in lighted
indicator display housing.
(13) Tighten four captive screws in lamp mounting
panel.
(14) Connect lighted indicator display to connector
PX7.
(15) Position lighted indicator display in instrument
panel assembly with four screws.
(16) Tighten four screws to 6-10 lb-in. (1 N·m).
(17) Connect batteries (para 7-48).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

e36. FRONT BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).
Air tanks drained (TM 9-2320-365-10).

Personnel Required
(2)

1.

NO

YES
Go to step 4 of this fault.

CAUTION
Read CAUTION
on following page.

START

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Other indicator lights
illuminate.
FRONT BRAKE AIR pressure
gage operates.

Faulty front brake air indicator
lamps.
Faulty front air pressure
transmitter.
Faulty lighted indicator
display.
Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 15-25 ohms resistance
present from lighted
indicator display connector
socket 27 to socket 25?

TM 9-2320-365-20-1

2-492 Change 1

Resistance Test or
STE/ICE-R Test #91

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

RESISTANCE TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display connector socket
27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display connector socket
25 and note reading on multimeter.
(7) If 15-25 ohms resistance is not present, go
to step 4 of this fault.

Change 1 2-493

TM 9-2320-365-20-1

KNOWN INFO
2.

Is continuity present from
connector PX7 pin 25 to
terminal lug TL156?

REASON FOR QUESTION

NO

YES

Repair wire 1530 from connector PX7 pin 25
to terminal lug TL156 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

If continuity is not present,
wire 1530 is faulty.

e36. FRONT BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

CAUTION
Read CAUTION
on following page.

Other indicator lights
illuminate.
FRONT BRAKE AIR pressure
gage operates.
Front brake air indicator lamps
OK.
Lighted indicator display OK.

POSSIBLE PROBLEMS

Faulty front air pressure
transmitter.
Faulty dashboard cable
assembly.

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

TM 9-2320-365-20-1

2-494 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7 pin 25.
(3) Connect negative (-) probe of multimeter to
terminal lug TL156 and note reading on
multimeter.
(4) If continuity is not present, repair wire 1530
from connector PX7 pin 25 to terminal lug
TL156 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

CONTINUITY TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Change 1 2-495

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

3.

Is 24 VDC present at
connector PX7 pin 27?

If 24VDC is not present, wire
1658 is faulty. If continuity is
present, front air pressure
transmitter is faulty.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO

Other indicator lights
illuminate.
FRONT BRAKE AIR pressure
gage operates.
Front brake air indicator lamps
OK.
Lighted indicator display OK.

POSSIBLE PROBLEMS

Faulty front air pressure
transmitter.
Faulty dashboard cable
assembly.

Repair wire 1658 from connector PX7 pin 27
to terminal board TB1 position 61 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Replace front air pressure
transmitter (para 7-36).

e36. FRONT BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

Voltage Test or
STE/ICE-R Test #89

TM 9-2320-365-20-1

2-496 Change 1

VOLTAGE TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CAUTION

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-496.1

TM 9-2320-365-20-1

(11) Position lighted indicator display in
instrument panel assembly with four
screws.
(12) Tighten four screws to 6-10 lb-in. (1 N·m).
(13) Connect batteries (para 7-48).

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX7 pin 27.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Connect batteries (para 7-48).
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) Position master power switch to off
(TM 9-2320-365-10).
(7) Disconnect batteries (para 7-48).
(8) If 24 VDC is not present, repair wire 1658
from connector PX7 pin 27 to terminal
board TB1 position 61 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If continuity is present, replace front air
pressure transmitter (para 7-36).
(10) Connect lighted indicator display connector
to connector PX7.

KNOWN INFO

Is continuity present
through front brake air
indicator lamps?

TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
front brake air indicator lamps
are faulty. If continuity is
present, lighted indicator
display is faulty.

YES

NO

Replace front brake air
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

4.

e36. FRONT BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

POSSIBLE PROBLEMS

Faulty front brake air indicator
lamps.
Faulty lighted indicator
display.

Other indicator lights
illuminate.
FRONT BRAKE AIR pressure
gage operates.

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-496.2 Change 1

CONTINUITY TEST

(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

(1) Loosen four captive screws in lamp
mounting panel.
(2) Remove lamp mounting panel from lighted
indicator display.
(3) Remove two front brake air indicator lamps
from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each front brake
air indicator lamp and note reading on
multimeter.
(6) If continuity is not present, replace front
brake air indicator lamps (para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install two front brake air indicator lamps
in printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Connect lighted indicator display
connector to connector PX7.
(12) Position lighted indicator display in
instrument panel assembly with four
screws.

Change 1 2-497

TM 9-2320-365-20-1

1.
KNOWN INFO
Other indicator lights operate.
REAR BRAKE AIR pressure
gage operates.
POSSIBLE PROBLEMS

Faulty rear brake air indicator
lamps.
Faulty rear air pressure
transmitter.
Faulty lighted indicator display.
Faulty dashboard cable
assembly.

REASON FOR QUESTION

NO

YES

e37. REAR BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI

CAUTION
Read CAUTION
on following page.

START

Go to step 4 of this fault.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).
Air tanks drained (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Is 15-25 ohms resistance
present from lighted
indicator display connector
socket 27 to socket 13?

TM 9-2320-365-20-1

2-498 Change 1

Resistance Test or
STE/ICE-R Test #91

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display connector socket
27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display connector socket
13 and note reading on multimeter.
(7) If 15-25 ohms resistance is not present, go
to step 4 of this fault.

RESISTANCE TEST

Change 1 2-499

TM 9-2320-365-20-1

KNOWN INFO

Other indicator lights operate.
REAR BRAKE AIR pressure
gage operates.
Rear brake air indicator lamps
OK.
Lighted indicator display OK.

POSSIBLE PROBLEMS

Faulty rear air pressure
transmitter.
Faulty dashboard cable
assembly.

2.

Is continuity present from
connector PX7 pin 13 to
terminal lug TL157?

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Repair wire 1525 from terminal lug TL157
to connector PX7 pin 13 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly (para 7-11).

e37. REAR BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1525 is faulty.

TM 9-2320-365-20-1

2-500 Change 1

CONTINUITY TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

CAUTION

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7 pin 13.
(3) Connect negative (-) probe of multimeter to
terminal lug TL157 and note reading on
multimeter.
(4) If continuity is not present, repair wire 1525
from terminal lug TL157 to connector PX7
pin 13 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-501

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

3.

Is 24 VDC present at
connector PX7 pin 27?

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO

POSSIBLE PROBLEMS

Repair wire 1658 from connector PX7 pin 27
to terminal board TB1 position 61 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

e37. REAR BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

Other indicator lights
illuminate.
REAR BRAKE AIR pressure
gage operates.
Rear brake air indicator lamps
OK.
Lighted indicator display OK.

Faulty rear air pressure
transmitter.
Faulty dashboard cable
assembly.

Replace rear air pressure
transmitter (para 7-36).

If 24VDC is not present, wire
1658 is faulty. If continuity is
present, rear air pressure
transmitter is faulty.

Voltage Test or
STE/ICE-R Test #89

TM 9-2320-365-20-1

2-502 Change 1

VOLTAGE TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back or not
capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-502.1

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector PX7 pin 27.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Connect batteries (para 7-48).
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) Position master power switch to off
(TM 9-2320-365-10).
(7) Disconnect batteries (para 7-48).
(8) If 24 VDC is not present, repair wire 1658
from connector PX7 pin 27 to terminal
board TB1 position 61 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If continuity is present, replace rear air
pressure transmitter (para 7-36).
(10) Connect lighted indicator display connector
to connector PX7.
(11) Position lighted indicator display in
instrument panel assembly with four
screws.
(12) Tighten four screws to 6-10 lb-in. (1 N·m).
(13) Connect batteries (para 7-48).

e37. REAR BRAKE AIR INDICATOR DOES NOT ILLUMINATE WHEN AIR PRESSURE IS BELOW
65 PSI (CONT)

KNOWN INFO

Is continuity present
through rear brake air
indicator lamps?

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Replace lighted indicator
display (para 7-16).

If continuity is not present,
rear brake air indicator lamps
are faulty. If continuity is
present, lighted indicator
display is faulty.

Replace rear brake air
indicator lamps (para 7-16).

4.

Other indicator lights
illuminate.
REAR BRAKE AIR pressure
gage operates.

POSSIBLE PROBLEMS
Faulty rear brake air indicator
lamps.
Faulty lighted indicator display.

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-502.2 Change 1

CONTINUITY TEST

(1) Loosen four captive screws in lamp
mounting panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove two rear brake air indicator lamps
from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each rear brake
air indicator lamp and note reading on
multimeter.
(6) If continuity is not present, replace rear
brake air indicator lamps (para 7-16).
(7) If continuity is present, replace lighted
indicator display (para 7-16).
(8) Install two rear brake air indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted
indicator display housing.
(10) Tighten four captive screws in lamp
mounting panel.
(11) Connect lighted indicator display connector
to connector PX7.
(12) Position lighted indicator display in
instrument panel assembly with four
screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

Change 1 2-503

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-504
2-504
2-504
2-504
2-504

1.

START

YES

This question eliminates
possible problems and
determines where
troubleshooting continues.

NO

Is continuity present
between lighted indicator
display terminals 23
and 27?

Go to step 3 of this fault.

TEST OPTIONS
KNOWN INFO

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Other indicator lights
operate.
Oil level OK.
Oil pressure switch OK.

POSSIBLE PROBLEMS

Faulty lighted indicator
display.
Faulty dashboard cable
assembly.
Faulty engine oil
pressure indicator lamps.

e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-505
2-505
2-505
2-505
2-505

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from
instrument panel assembly.
(3) Disconnect connector PX7 from lighted
indicator display.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
lighted indicator display terminal 27.
(6) Connect negative (-) probe of multimeter to
lighted indicator display terminal 23 and
note reading on multimeter.
(7) If continuity is not present, go to step 3 of
this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-506
2-506
2-506
2-506
2-506

YES

2.

NO

Is continuity present
between relay K11
terminal 85 and PX7-23?

If continuity is not
present, wire 34A is
faulty.

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Continuity Test or
STE/ICE-R #91

Other indicator lights
operate.
Oil level OK.
Oil pressure switch OK.
Lighted indicator
display OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.

Repair wire 34A (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Fault corrected.

e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-507
2-507
2-507
2-507
2-507

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove relay K11 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K11 was
removed.
(5) Connect negative (-) probe of multimeter to
PX7-23 and note reading on multimeter.
(6) If continuity is not present, repair wire 34A
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) Install relay K11 in PDP.
(8) Install PDP cover (para 16-2).
(9) Connect lighted indicator display to connector
PX7.
(10) Position lighted indicator display in instrument
panel assembly with four screws.
(11) Tighten four screws to 6-10 lb-in. (1 N·m).
(12) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-508
2-508
2-508
2-508
2-508

YES

Is continuity present
through engine oil
pressure indicator
lamps?

NO

3.

If continuity is not
present, engine oil
pressure indicator lamps
are faulty. If continuity
is present, lighted indicator
display is faulty.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Other indicator lights
operate.
Oil level OK.
Oil pressure switch OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty engine oil
pressure indicator lamps.
Faulty lighted indicator
display.

Replace engine oil pressure
indicator lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)
e38. ENGINE OIL PRESSURE INDICATOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-509
2-509
2-509
2-509
2-509

CONTINUITY TEST

(1) Loosen four captive screws in lamp mounting
panel.
(2) Remove lamp mounting panel from lighted
indicator display housing.
(3) Remove engine oil pressure indicator lamps
from printed circuit board.
(4) Set multimeter to ohms.
(5) Check continuity through each engine oil
pressure indicator lamp and note reading on
multimeter.
(6) If continuity is not present, replace engine oil
pressure indicator lamps (para 7-16).
(7) If continuity is present, replace lighted indicator
display (para 7-16).
(8) Install engine oil pressure indicator lamps in
printed circuit board.
(9) Install lamp mounting panel in lighted indicator
display housing.
(10) Tighten four captive screws in lamp mounting
panel.
(11) Connect lighted indicator display to connector
PX7.
(12) Position lighted indicator display in instrument
panel assembly with four screws.
(13) Tighten four screws to 6-10 lb-in. (1 N·m).
(14) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-510
2-510
2-510
2-510
2-510

1.

START

Other indicator lights
operate.
Is continuity present
through master stop
indicator lamps?

YES

NO

If continuity is not
present, master stop
indicator lamps are
faulty. If continuity is
present, lighted indicator
display is faulty.

Faulty master stop
indicator lamps.
Faulty lighted indicator
display.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e39. MASTER STOP INDICATOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

Replace master stop indicator
lamps (para 7-16).

Replace lighted indicator
display (para 7-16).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-511
2-511
2-511
2-511
2-511

CONTINUITY TEST

(1) Remove four screws from lighted indicator
display.
(2) Remove lighted indicator display from instrument
panel assembly.
(3) Disconnect connector PX7 from lighted indicator
display.
(4) Loosen four captive screws in lamp mounting
panel.
(5) Remove lamp mounting panel from lighted
indicator display housing.
(6) Remove master stop indicator lamps from
printed circuit board.
(7) Set multimeter to ohms.
(8) Check continuity through each master stop
indicator lamp and note reading on multimeter.
(9) If continuity is not present, replace master stop
indicator lamps (para 7-16).
(10) If continuity is present, replace lighted indicator
display (para 7-16).
(11) Install master stop indicator lamps in printed
circuit board.
(12) Install lamp mounting panel in lighted indicator
display housing.
(13) Tighten four captive screws in lamp mounting
panel.
(14) Connect lighted indicator display to connector
PX7.
(15) Position lighted indicator display in instrument
panel assembly with four screws.
(16) Tighten four screws to 6-10 lb-in. (1 N·m).
(17) Connect batteries (para 7-48).

e40. ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE

Repair wire 3051 from
connector P13 to terminal lug TL81
(para 2-40) or replace front lights
cable assembly (para 7-74).

2.
TEST OPTIONS

Operational Test

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

START

1.

Does one headlight
illuminate?

TEST OPTIONS

Operational Test

REASON FOR QUESTION

This test eliminates possible
problems and determines
where troubleshooting
continues.

KNOWN INFO
Nothing.
POSSIBLE PROBLEMS

Faulty front lights cable
assembly.
Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

NO

Go to step 3 of this fault.
YES

Does left headlight
illuminate?

One headlight illuminates.
Main light switch OK.
Dashboard cable
assembly OK.
Relay K8 OK.
Relay K7 OK.

Faulty front lights cable
assembly.

If left headlight does not
illuminate, wire 3052 is faulty.
If right headlight does not
illuminate, wire 3051 is
faulty.

NO

YES

Repair wire 3052 from
connector P19 to terminal lug TL123
(para 2-40) or replace front lights
cable assembly (para 7-74).

Personnel Required
(2)

References
TM 9-4910-571-12&P

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1

2-512 Change 1

OPERATIONAL TEST

OPERATIONAL TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If both headlights do not operate, go to step
3 of this fault.
(3) Position main light switch to OFF (TM 9-
2320-365-10).

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Observe which headlight illuminates.
(3) If left headlight illuminates, repair wire
3051 from connector P13 to terminal lug
TL81 (para 2-40) or replace front lights
cable assembly (para 7-74).
(4) If RH headlight illuminates, repair wire
3052 from connector P19 to terminal lug
TL123 (para 2-40) or replace front lights
cable assembly (para 7-74).
(5) Position main light switch to OFF (TM 9-
2320-365-10).

Change 1 2-513

TM 9-2320-365-20-1

KNOWN INFO

NO

YES

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

Replace main light switch
(para 7-17).

3.

4.

WARNING
Read WARNING
on following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

YES

NO

Go to step 9 of this fault.

POSSIBLE PROBLEMS

Front lights cable assembly
OK.

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

Is continuity present
through main light switch
terminals F and M?
If continuity is not present,
main light switch is faulty.

If 12 VDC is not present,
wire 16 is faulty.

Is 12 VDC present at
relay K7 terminal 86?

POSSIBLE PROBLEMS

Front lights cable assembly
OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

e40. ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-514 Change 1

CONTINUITY TEST

VOLTAGE TEST

(1) Remove main light switch (para 7-17).
(2) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
main light switch terminal M.
(5) Connect negative (-) probe of multimeter to
main light switch terminal F and note
reading on multimeter.
(6) If continuity is not present replace main
light switch (para 7-17).
(7) Position main light switch to OFF (TM 9-
2320-365-10).
(8) Install main light switch (para 7-17).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove relay K7 form PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
PDP terminal 86, where relay K7 was
removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, go to step 9 of
this fault.
(8) Position main light switch to OFF (TM 9-
2320-365-10).

Change 1 2-515

TM 9-2320-365-20-1

KNOWN INFO

NO

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

WARNING
Read WARNING
on following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

YES

NO

5.

6.

Repair wire 1416 from PDP relay K7
terminal 30 to circuit breaker CB78
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3002 from PDP relay K7
terminal 85 to terminal board TB2
position 74 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly (para 7-11).

YES

e40. ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Front lights cable assembly
OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

Is continuity present from
relay K7 terminal 85 to a
known good ground?
If continuity is not present,
wire 3002 is faulty.

If 12 VDC is not present,
wire 1416 is faulty.

Is 12 VDC present at relay
K7 terminal 30?

Front lights cable assembly
OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

TM 9-2320-365-20-1

2-516 Change 1

CONTINUITY TEST

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
PDP terminal 30, where relay K7 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, Repair wire 1416
from PDP relay K7 terminal 30 to circuit
breaker CB78 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly (para
7-11).
(6) Position main light switch to OFF (TM 9-
2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP terminal 85, where relay K7 was
removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3002
from PDP relay K7 terminal 85 to terminal
board TB2 position 74 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).

Change 1 2-517

TM 9-2320-365-20-1

KNOWN INFO

NO

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

YES

7.

Repair wire 1417 from PDP relay K7
terminal 87 to PDP relay K8 terminal 30
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

8.

Replace relay K8
(para 7-9).

Continuity Test or
STE/ICE-R Test #91

e40. ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Front lights cable assembly
OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty relay K7.

Is continuity present from
relay K7 terminal 87 to relay
K8 terminal 30?
If continuity is not present,
wire 1417 is faulty.

If continuity is not present,
relay K8 is faulty. If continuity
is present, relay K7 is faulty.

Is continuity present from
relay K8 terminal 30 to
terminal 87A?

Front lights cable assembly
OK.
Main light switch OK.
Dashboard cable assembly
OK.

POSSIBLE PROBLEMS

Faulty relay K8.
Faulty relay K7.

Replace relay K7
(para 7-9).

TM 9-2320-365-20-1

2-518 Change 1

CONTINUITY TEST

CONTINUITY TEST

(1) Remove relay K8 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
PDP terminal 87, where relay K7 was
removed.
(4) Connect negative (-) probe of multimeter to
PDP terminal 30, where relay K8 was
removed and note reading on multimeter.
(5) If continuity is not present, repair wire 1417
from PDP relay K7 terminal 87 to PDP relay
K8 terminal 30 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable assembly
(para 7-11).
(6) Install relay K7 in PDP.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K8 terminal 87A.
(3) Connect negative (-) probe of multimeter to
relay K8 terminal 30 and note reading on
multimeter.
(4) If continuity is not present, replace relay
K8 (para 7-9).
(5) If continuity is present, replace relay K7
(para 7-9).
(6) Install relay K8 in PDP.
(7) Install PDP cover (para 16-2).

TM 9-2320-365-20-1

Change 1 2-518.1

e40. ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

9.

Faulty dashboard cable
assembly.

Front lights cable assembly
OK.
Main light switch OK.
Relay K8 OK.
Relay K7 OK.

POSSIBLE PROBLEMS

Is continuity present from
relay K7 terminal 86 to
connector P18 pin 3?
This test determines which
section of wire 16 is faulty.

Repair wire 16 from connector P16 pin 3
to connector PX15 socket M (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 16 from PDP relay K7
terminal 86 to connector P16 pin 3
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

NO

CAUTION
Read CAUTION
on following page.

TM 9-2320-365-20-1

2-518.2 Change 1

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector P18 from
connector J18.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to PDP terminal 86, where relay K7 was
removed.
(5) Connect negative (-) probe of multimeter
to connector P18 pin 3 and note reading
on multimeter.
(6) If continuity is not present, repair wire
16 from PDP relay K7 terminal 86 to
connector P18 pin 3 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If continuity is present, repair wire 16
from connector P16 pin 3 to connector
PX15 socket M (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Install relay K7 in PDP.
(9) Install PDP cover (para 16-2).
(10) Connect connector P18 to connector J18.
(11) Install instrument panel assembly
(para 7-15).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Change 1 2-519

TM 9-2320-365-20-1

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-520
2-520
2-520
2-520
2-520

YES

START

1.
Operational Test

This question eliminates
possible problems and
determines where
troubleshooting continues.

Headlight high beams
illuminate.
Does one headlight low
beam illuminate?

NO

Faulty headlight lamp.
Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty turn signal switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

2.

Is continuity present
between headlight lamp
wire 18 and
headlight lamp wire 91?

If continuity is not present,
headlight lamp is
faulty. If continuity is
present, wire 18 is faulty.

YES

NO

Headlight high beams
illuminate.
One headlight low beam
operational.
Dashboard cable
assembly OK.
Relay K8 OK.
Turn signal switch OK.

Faulty headlight lamp.
Faulty headlamp wire 18.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Go to step 3 of this fault.

Replace headlight lamp
(para 7-34).

Repair wire 18 (para 2-40)
or replace front lights cable
assembly (para 7-74).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-521
2-521
2-521
2-521
2-521

OPERATIONAL TEST

CONTINUITY TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Position headlight low beams to on
(TM 9-2320-365-10).
(3) If both headlight low beams do not illuminate,
go to step 3 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Remove three screws and retaining ring from
housing.
(2) Remove lamp from housing.
(3) Disconnect headlight lamp wire 18 from
housing.
(4) Disconnect headlight lamp wire 91 from
housing.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
headlight lamp wire 18.
(7) Connect negative (-) probe of multimeter to
headlight lamp wire 91 and note reading on
multimeter.
(8) If continuity is not present, replace headlight
lamp (para 7-34).
(9) If continuity is present, repair wire 18
(para 2-40) or replace front lights cable
assembly (para 7-74).
(10) Connect headlight lamp wire 18 to housing.
(11) Connect headlight lamp wire 91 to housing.
(12) Install lamp in housing.
(13) Install retaining ring on housing with three
screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-522
2-522
2-522
2-522
2-522

3.

If continuity is not present,
wire 18 is faulty.

YES

NO

Is continuity present
between connector P12 (RH)
or connector P4 (LH)
headlight terminal and
relay K8 terminal 87A?

Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty turn signal switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

4.

YES

NO

If continuity is not present,
relay K8 is faulty. If
continuity is present,
turn signal switch is faulty.

Faulty relay K8.
Faulty turn signal switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION
Is continuity present
between relay K8 terminal
87A and relay K8 terminal
30?

Headlight high beams
illuminate.
Headlight lamp OK.

Headlight high beams
illuminate.
Headlight lamp OK.
Front lights cable
assembly OK.
Dashboard cable
assembly OK.

Go to step 5 of this fault.

Replace relay K8
(para 7-9).

Replace turn signal
switch (para 7-25).

e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-523
2-523
2-523
2-523
2-523

CONTINUITY TEST

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove relay K8 from PDP.
(3) Disconnect connector P12 (RH) or connector
P4 (LH) from housing.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector P12 (RH) or connector P4 (LH).
(6) Connect negative (-) probe of multimeter to
PDP, terminal 87A, where relay K8 was
removed and note reading on multimeter.
(7) If continuity is not present, go to step 5
of this fault.
(8) Connect connector P12 (RH) or connector
P5 (LH) to housing.

(1) Set multimeter to ohms
(2) Connect positive (+) probe of multimeter to
relay K8 terminal 87A.
(3) Connect negative (-) probe of multimeter to
relay K8 terminal 30 and note reading on
multimeter.
(4) If continuity is not present, replace relay K8
(para 7-9).
(5) If continuity is present, replace turn signal
switch (para 7-25).
(6) Install relay K8 in PDP.
(7) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-524
2-524
2-524
2-524
2-524

YES

NO

5.

Is continuity present
between relay K8
terminal 30 and
connector J27-13?

If continuity is not present,
wire 18 in dashboard
cable assembly is faulty.
If continuity is present,
wire 18 in front lights
cable assemby is faulty.

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION

Headlight high beams
illuminate.
Headlight lamp OK.

Repair wire 18 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 18 (para 2-40)
or replace front lights
cable assembly (para 7-74).

e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)
e41. ONE OR BOTH HEADLIGHT LOW BEAMS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-525
2-525
2-525
2-525
2-525

CONTINUITY TEST

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J27 from connector P27.
(5) Set multimeter to ohms
(6) Connect positive (+) probe of multimeter to
PDP, relay K8 terminal 87A, where relay K8 was
removed.
(7) Connect negative (-) probe of multimeter to
connector J27-13 and note reading on
multimeter.
(8) If continuity is not present, repair wire 18
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(9) If continuity is present, repair wire 18
(para 2-40) or replace front lights cable
assembly (para 7-74).
(10) Connect connector P27 to connector J27.
(11) Install PDP in dashboard with three screws.
(12) Install three washers and screws in PDP.
(13) Install relay K8 in PDP.
(14) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-526
2-526
2-526
2-526
2-526

YES

START

1.
Headlight low beams
illuminate.
Does one headlight high
beam illuminate?

Operational Test

This test eliminates
possible problems and
determines where
troubleshooting continues.

NO

Faulty headlight lamp.
Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty relay K8.
Faulty turn signal
switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

2.

Is continuity present
between headlight lamp
wire 17 and headlight
lamp wire 91?

YES

If continuity is not present,
headlight lamp is faulty. If
continuity is present,
wire 17 is faulty.

NO

Headlight low beams
illuminate.
One headlight high beam
illuminates.
Dashboard cable
assembly OK.
Relay K8 OK.
Turn signal switch OK.

Faulty headlight lamp.
Faulty wire 17.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Go to step 3 of this fault.

Replace headlight lamp
(para 7-34).

Repair wire 17 (para 2-40)
or replace front lights cable
assembly (para 7-74).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-527
2-527
2-527
2-527
2-527

OPERATIONAL TEST

CONTINUITY TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Position headlight high beams on
(TM 9-2320-365-10).
(3) If both headlights high beams do not
illuminate, and go to step 3 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Remove three screws and retaining ring
from housing.
(2) Remove headlight lamp from housing.
(3) Disconnect headlight lamp wire 17 from
housing.
(4) Disconnect headlight lamp wire 91 from
housing.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
headlight lamp wire 17.
(7) Connect negative (-) probe of multimeter to
headlight lamp wire 91 and note reading on
multimeter.
(8) If continuity is not present, replace headlight
lamp (para 7-34).
(9) If continuity is present, repair wire 17
(para 2-40) or replace front lights cable
assembly (para 7-74).
(10) Connect headlight lamp wire 17 to housing.
(11) Connect headlight lamp wire 91 to housing.
(12) Install headlight lamp in housing.
(13) Install retaining ring on housing with three
screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-528
2-528
2-528
2-528
2-528

YES

YES

3.

4.

Is continuity present
between connector P14 (RH)
or connector P20 (LH) and
relay K8 terminal 87?

If continuity is not present,
wire 17 is faulty.

This test eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 vdc present at
relay K8 terminal 86?

NO

Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty relay K8.
Faulty turn signal switch.

WARNING
Read WARNING
on following page.

NO

Faulty relay K8.
Faulty dashboard cable
assembly.
Faulty turn signal switch.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Headlight low beams
illuminate.
Headlight lamp OK.

Headlight low beams
illuminate.
Headlight lamp OK.
Front lights cable
assembly OK.

Go to step 8 of this fault.

Go to step 6 of this fault.

e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-529
2-529
2-529
2-529
2-529

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

(1) Remove PDP cover (para para 16-2).
(2) Remove relay K8 from PDP.
(3) Disconnect connector P14 (RH) or connector
P20 (LH) from housing.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
PDP, terminal 87A, where relay K8 was
removed.
(6) Connect negative (-) probe of multimeter to
connector P14 (RH) or connector P20 (LH)
and note reading on multimeter.
(7) If continuity is not present, go to step 8
of this fault.
(8) Connect connector P14 (RH) or connector P20
(LH) to housing.

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 86, where relay K8 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Position headlight high beams to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, go to step 6 of
this fault.
(7) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-530
2-530
2-530
2-530
2-530

5.

Is continuity present
between relay K8
terminal 85 and a
known good ground?

YES

If continuity is not present,
wire 3053 is faulty. If
continuity is present,
relay K8 is faulty.

NO

Faulty dashboard cable
assembly.
Faulty relay K8.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

6.

Is 12 vdc present at
connector P18-3?
If 12 vdc is not present,
wire 16A is faulty.

YES

WARNING
Read WARNING
on following page.

NO

Faulty turn signal switch.
Faulty dashboard cable
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Headlight low beams
illuminate.
Headlight lamp OK.
Front lights cable
assembly OK.
Turn signal switch OK.

Headlight low beams
illuminate.
Headlight lamp OK.
Front lights cable
assembly OK.

Repair wire 3053 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace relay K8
(para 7-9).

Repair wire 16A (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-531
2-531
2-531
2-531
2-531

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K8 was
removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3053
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace relay K8
(para 7-9).
(6) Install relay K8 in PDP.
(7) Install PDP cover (para 16-2).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector P18 from connector
J18.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P18-3.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, repair wire 16A
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-532
2-532
2-532
2-532
2-532

YES

7.

Is continuity present
between connector P18
terminals 2 and 3?
If 12 vdc is not present,
headlight dimmer control
is faulty. If 12 vdc is
present, wire 16A is
faulty.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty turn signal switch.
Faulty dashboard cable
assembly.

Continuity Test or
STE/ICE-R #91

YES

NO

8.

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

Is continuity present
between relay K8
terminal 30 and
connector J27-6?

If continuity is not present,
wire 17 in dashboard
cable assembly is faulty.
If continuity is present,
wire 17 in front lights
cable assemby is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION

One headlight low beam
illuminates.
Headlight lamp OK.
Front lights cable
assembly OK.
Relay K8 OK.

Headlight high beams
illuminate.
Headlight lamp OK.
Turn signal switch OK.
Relay K8 OK.

Replace turn signal
switch (para 7-25).

Repair wire 16A (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 17 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 17 (para 2-40)
or replace front lights
cable assembly (para 7-74).

e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)
e42. ONE OR BOTH HEADLIGHT HIGH BEAMS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-533
2-533
2-533
2-533
2-533

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P18-3.
(3) Connect negative (-) probe of multimeter to
connector P18-2.
(4) If continuity is not present, replace turn
signal switch (para 7-25).
(5) If continuity is present, repair wire 16A
(para 2-40) or replace WETC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Connect connector P18 to connector J18.
(7) Install instrument panel assembly (para
7-15).
(8) Install relay K8 in PDP.
(9) Install PDP cover (para 16-2).

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J27 from connector P27.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
PDP, relay K8 terminal 30, where relay K8 was
removed.
(7) Connect negative (-) probe of multimeter to
connector J27-6 and note reading on
multimeter.
(8) If continuity is not present, repair wire 17
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If continuity is present, repair wire 17
(para 2-40) or replace front lights cable
assembly (para 7-74).
(10) Connect connector P27 to connector J27.
(11) Install PDP in dashboard with three screws.
(12) Install three washers and screws in PDP.
(13) Install relay K8 in PDP.
(14) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-534
2-534
2-534
2-534
2-534

YES

START

1.
Operational Test

Does one parking light
illuminate?
This question eliminates
possible problems and
determines where
troubleshooting continues.

Circuit breaker OK.
Turn signals operate.

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Faulty lamp.
Faulty composite front
light assembly.
Faulty front lights cable
assembly.
Faulty main light switch.
Faulty dashboard cable
assembly.

e43. PARKING LIGHTS DO NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Packing, Preformed (Item 170, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Go to step 5 of this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-535
2-535
2-535
2-535
2-535

OPERATIONAL TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Position main light switch auxiliary lever to
PARK (TM 9-2320-365-10).
(3) If no parking lights illuminate, go to step 5 of
this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-536
2-536
2-536
2-536
2-536

3.

2.

YES

Is continuity present
through lamp?
If continuity is not
present, lamp is faulty.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 vdc present at lamp
socket center contact?

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

Circuit breaker OK.
Turn signals operate.
Other parking light
illuminates.
Main light switch OK.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

NO

Circuit breaker OK.
Turn signals operate.
Other parking light
illuminates.
Main light switch OK.
Lamp OK.

Continuity Test or
STE/ICE-R#91

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Faulty lamp.
Faulty composite front
light assembly.
Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.

Faulty composite front
light assembly.
Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.

Replace lamp
(para 7-33).

Go to step 6 of this fault.

e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-537
2-537
2-537
2-537
2-537

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Loosen five screws on cover.
(2) Remove cover and preformed packing from
housing. Discard preformed packing.
(3) Remove lamp from socket.
(4) Set multimeter to ohms.
(5) Check continuity through lamp and note
reading on multimeter.
(6) If continuity is not present, replace lamp
(para 7-33).

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
center contact of lamp socket.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Position main light switch auxiliary lever to
PARK (TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 vdc is not present, go to step 6 of
this fault.
(7) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-538
2-538
2-538
2-538
2-538

YES

4.

Is continuity present from
lamp socket to composite
light housing?

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

Circuit breaker OK.
Turn signals operate.
Other parking light
illuminates.
Main light switch OK.
Lamp OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R #91

5.

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
between main light
switch terminals L and F?
If continuity is not present,
main light switch is
faulty. If continuity is
present, wire 491 is faulty.

Continuity Test or
STE/ICE-R #91

Faulty composite front
light assembly.
Faulty front lights cable
assembly.

If continuity is not present,
composite front light
assembly is faulty. If
continuity is present,
wire 3091is faulty.

Circuit breaker OK.
Turn signals operate.
Front lights cable
assembly OK.
Composite front light
assembly OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.

Replace composite front
light assembly (para 7-33).

Repair wire 3091 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace main light
switch (para 7-17).

Repair wire 491 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-539
2-539
2-539
2-539
2-539

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
lamp socket.
(3) Connect negative (-) probe of multimeter to
composite front light housing and note reading
on multimeter.
(4) If continuity is not present, replace composite
front light assembly (para 7-33).
(5) If continuity is present, repair wire 3091
(para 2-40) or replace front lights cable
assembly (para 7-74).
(6) Install lamp in socket.
(7) Install preformed packing and cover on housing
with five screws.

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX15 from main light
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
main light switch terminal L.
(5) Connect negative (-) probe of multimeter to
main light switch terminal F.
(6) Position main light switch auxiliary lever to
PARK (TM 9-2320-365-10) and note reading
on multimeter.
(7) If continuity is not present, replace main light
switch (para 7-17).
(8) If continuity is present, repair wire 491
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(9) Connect connector PX15 to main light switch.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-540
2-540
2-540
2-540
2-540

6.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Turn signals operate.
Other parking light
illuminates.
Lamp OK.
Main light switch OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Is continuity present
between circuit
breaker CB65 terminal 87
and connector J27-9?

NO

YES

Continuity Test or
STE/ICE-R #91

Faulty front lights cable
assembly.
Faulty composite front
light assembly.

If continuity is not present,
wire 491 is faulty. If
continuity is present,
composite front light
assembly is faulty.

Repair wire 491 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace composite front
light assembly (para 7-33).

e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)
e43. PARKING LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-541
2-541
2-541
2-541
2-541

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector P27.
(6) Remove circuit breaker CB65 from PDP.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter to
PDP, terminal 8, where CB65 was removed.
(9) Connect negative (-) probe of multimeter to
connector J27-9 and note reading on
multimeter.
(10) If continuity is not present, repair wire 491
(para 2-40) or replace front lights cable
assembly (para 7-74).
(11) If continuity is present, replace composite front
light assembly (para 7-33).
(12) Install lamp in socket.
(13) Install preformed packing and cover on housing
with five screws.
(14) Connect connector J27 to connector P27.
(15) Install PDP on dashboard with three screws.
(16) Install three washers and screws in PDP.
(17) Install circuit breaker CB65 in PDP.
(18) Install PDP cover (para 16-2).

KNOWN INFO

POSSIBLE PROBLEMS

1.
TEST OPTIONS

REASON FOR QUESTION

NO

YES
Go to step 4 of this fault.

2.
KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

NO

YES
Replace LH cab marker
light lamp (para 7-31).

START

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Lockwasher (4) (Item 71, Appendix G)
Gasket (2) (Item 28, Appendix G)

Personnel Required
(2)

References
TM 9-4910-571-12&P

Other marker lights illuminate.

Faulty lamp.
Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Does LH door marker light
illuminate?
This question eliminates
possible problems and
determines where
troubleshooting continues.

Operational Test

Continuity Test or
STE/ICE-R Test #91

If continuity is not present, LH
cab marker light lamp is faulty.

Is continuity present
through LH cab marker light
lamp?

Other marker lights illuminate.
LH door marker light
illuminates.

Faulty lamp.
Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

TM 9-2320-365-20-1

2-542 Change 1

(1) Remove two screws and lens cover from LH
cab marker light base.
(2) Remove LH marker light lamp from socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH marker light
lamp and note reading on multimeter.
(5) If continuity is not present, replace LH
marker light lamp (para 7-31).

CONTINUITY TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If LH door marker light lamp does not
illuminate, go to step 4 of this fault.
(3) Position main light switch to OFF (TM 9-
2320-365-10).

Change 1 2-542.1

TM 9-2320-365-20-1

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

KNOWN INFO
3.
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Replace LH cab marker
light (para 7-31).

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89
Other marker lights illuminate.
LH door marker light
illuminates.
LH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Is 12 VDC present at
connector P129 socket?

If 12 VDC is not present, wire
1949 is faulty. If 12 VDC is
present, LH cab marker light
is faulty.

TM 9-2320-365-20-1

2-542.2 Change 1

Repair wire 1949 from connector
P129 socket to splice E25 (para 2-40)
or replace LH door and cab marker
lights cable assembly (para 7-54).

(14) Install lockwasher, terminal lug TL133,
lockwasher, and nut on back of LH cab
marker light base.
(15) Install LH cab marker light base on
vehicle with four screws.
(16) Install LH cab marker light lamp in socket.
(17) Install lens cover on base with two
screws.

(9) If 12 VDC is not present, repair wire 1949
from connector P129 socket to splice E25
(para 2-40) or replace LH door and cab
marker lights cable assembly (para 7-54).
(10) If 12 VDC is present, replace LH cab marker
light (para 7-31).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Install gasket on LH cab marker light base.
(13) Connect marker light connector to connector
P129.

(2) Remove nut, lockwasher, terminal lug TL133,
and lockwasher from LH cab marker
light base. Discard lockwashers.
(3) Extend base and disconnect connector P129
from marker light connector.
(4) Remove gasket from LH door marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P129 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.

Do not let wires slip through hole
into cab structure. If wires slip into
cab structure, vehicle will need further
disassembly to retrieve wires.

NOTE

(1) Remove four screws from LH cab marker
light base.

VOLTAGE TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 1 2-543

TM 9-2320-365-20-1

VOLTAGE TEST (Cont)

KNOWN INFO
4.
TEST OPTIONS

Is continuity present
through LH door marker
light lamp?

REASON FOR QUESTION

YES

NO

5.
KNOWN INFO

Does LH cab marker
light illuminate?

TEST OPTIONS

YES

NO

POSSIBLE PROBLEMS

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

Replace LH door marker
light lamp (para 7-31).

Go to step 8 of this fault.

TM 9-2320-365-20-1

2-544 Change 1

Other marker lights illuminate.

Faulty lamp.
Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Other marker lights illuminate.
LH door marker light lamp OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Operational Test

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

If continuity is not present, LH
door marker light lamp is
faulty.

CONTINUITY TEST

(1) Remove two screws and lens cover from
LH door marker light base.
(2) Remove LH door marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH door marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace LH door
marker light lamp (para 7-31).

Change 1 2-545

TM 9-2320-365-20-1

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If LH cab marker light lamp does not
illuminate, go to step 8 of this fault.
(3) Position main light switch to OFF
(TM 9-2320-365-10).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

6.

YES

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Other marker lights illuminate.
LH door marker light lamp OK.
LH cab marker light illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Is 12 VDC present at
connector P130 socket?

If 12 VDC is not present, wire
1949 is faulty.

TM 9-2320-365-20-1

2-546 Change 1

Repair wire 1949 from connector
P130 socket to splice E25 (para 2-40)
or replace LH door and cab marker
lights cable assembly (para 7-54).

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST
(1) Remove four screws from LH door marker
light base.
NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.
(2) Remove nut, lockwasher, terminal lug TL130,
and lockwasher from LH door marker light
base. Discard lockwashers.
(3) Extend base and disconnect connector P130
from marker light connector.
(4) Remove gasket from LH door marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P130 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(9) If 12 VDC is not present, repair wire 1949
from connector P130 socket to splice
E25 (para 2-40) or replace LH door and cab
marker lights cable assembly (para 7-54).
(10) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-546.1

TM 9-2320-365-20-1

7.
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Is continuity present from
terminal lug TL130 to
terminal lug TL133?

NO

Continuity Test or
STE/ICE-R Test #91
Other marker lights illuminate.
LH door marker light lamp OK.
LH cab marker light illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

If continuity is not present,
wire 3098 is faulty. If
continuity is present, LH door
marker light is faulty.

Replace LH door marker
light (para 7-31).

YES

Repair wire 3098 from terminal lug TL130
to terminal lug TL133 (para 2-40) or
replace LH door and cab marker lights
cable assembly (para 7-54).

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-546.2 Change 1

NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(1) Remove two screws and lens cover from
LH cab marker light base.
(2) Remove LH cab marker light lamp from
socket.
(3) Remove four screws from LH cab marker
light base.

(4) Remove nut, lockwasher, terminal lug
TL133, and lockwasher from LH cab
marker light base. Discard lockwashers.
(5) Extend base and disconnect connector
P129 from marker light connector.
(6) Remove gasket from LH cab marker light
base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to terminal lug TL130.
(9) Connect negative (-) probe of multimeter
to terminal lug TL133 and note reading
on multimeter.
(10) If continuity is not present, repair wire
3098 from terminal lug TL130 to terminal
lug TL133 (para 2-40) or replace LH door
and cab marker lights cable assembly
(para 7-54).
(11) If continuity is present, replace LH door
marker light (para 7-31).
(12) Install gasket on LH cab marker light
base.
(13) Connect marker light connector to
connector P129.
(14) Install lockwasher, terminal lug TL133,
lockwasher, and nut on back of LH cab
marker light base.
(15) Install LH cab marker light base on
vehicle with four screws.
(16) Install LH cab marker light lamp in socket.
(17) Install lens cover on base with two
screws.
(18) Install gasket on LH door marker light
base.
(19) Connect marker light connector to
connector P130.
(20) Install lockwasher, terminal lug TL130,
lockwasher, and nut on back of base.
(21) Install LH door marker light base on
vehicle with four screws.
(22) Install LH door marker light lamp in socket.
(23) Install lens cover on base with two
screws.

CONTINUITY TEST

Change 1 2-547

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

9.

REASON FOR QUESTION

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Faulty lamp.
Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Other marker lights illuminate.
LH door marker light lamp OK.

KNOWN INFO

YES

Is continuity present
through LH cab marker
light lamp?

8.

If continuity is not present, LH
cab marker light lamp is faulty.

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Replace LH cab marker
light lamp (para 7-31).

NO

Other marker lights illuminate.
LH door marker light Lamp OK.
LH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Is continuity present from
terminal lug TL130 to a
known good ground?
This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 12 of this fault.
YES

NO

TM 9-2320-365-20-1

2-548 Change 1

CONTINUITY TEST

CONTINUITY TEST

(1) Remove two screws and lens cover from
LH cab marker light base.
(2) Remove LH cab marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH cab marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace LH cab
marker light lamp (para 7-31).

NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(1) Remove two screws and lens cover from
LH door marker light base.
(2) Remove LH door marker light lamp from
socket.
(3) Remove four screws from LH door marker
light.

Change 1 2-548.1

TM 9-2320-365-20-1

(4) Remove nut, lockwasher, terminal lug
TL130, and lockwasher from LH door
marker light base. Discard
lockwashers.
(5) Extend base and disconnect connector
P130 from marker light connector.
(6) Remove gasket from LH door marker
light base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to terminal lug TL130.
(9) Connect negative (-) probe of multimeter
to ground and note reading on
multimeter.
(10) If continuity is not present, go to step 12
of this fault.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

10.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89
Other marker lights illuminate.
LH door marker light
illuminates.
LH cab marker light lamp OK.

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 VDC present at
connector P129 socket?

YES
Go to step 13 of this fault.

TM 9-2320-365-20-1

2-548.2 Change 1

WARNING

CAUTION

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Remove four screws from LH cab marker
light base.
NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.
(2) Remove nut, lockwasher, terminal lug
TL133, and lockwasher from LH cab
marker light base. Discard
lockwashers.
(3) Extend base and disconnect connector
P129 from marker light connector.
(4) Remove gasket from LH cab marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P129 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 12 VDC is not present, go to step 13 of
this fault.

(14) Install LH cab marker light base on
vehicle with four screws.
(15) Install LH cab marker light lamp in socket.
(16) Install lens cover on base with two
screws.

(10) Position main light switch to OFF (TM 9-
2320-365-10).
(11) Install gasket on LH cab marker light base.
(12) Connect marker light connector to
connector P129.
(13) Install lockwasher, terminal lug TL133,
lockwasher, and nut on back of LH cab
marker light base.

Change 1 2-548.3

TM 9-2320-365-20-1

VOLTAGE TEST (Cont)

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

11.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89
Other marker lights illuminate.
LH door marker light lamp OK.
LH cab marker light illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Is 12 VDC present at
connector P130 socket?

If 12 VDC is not present, wire
1949 is faulty.

Replace LH cab marker light
and LH door marker light
(para 7-31).

TM 9-2320-365-20-1

2-548.4 Change 1

Repair wire 1949 from connector
P130 socket to splice E25 (para 2-40)
or replace LH door and cab marker
lights cable assembly (para 7-54).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

WARNING

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(11) Install LH door marker light base on vehicle
with four screws.
(12) Install LH door marker light lamp in socket.
(13) Install lens cover on base with two screws.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector P130 socket.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 12 VDC is not present, repair wire 1949
from connector P130 socket to splice
E25 (para 2-40) or replace LH door and
cab marker lights cable assembly (para
7-54).
(6) If 12 VDC is present, replace LH cab
marker light and LH door marker light
(para 7-31).
(7) Position main light switch to OFF (TM 9-
2320-365-10).
(8) Install gasket on LH door marker light
base.
(9) Connect marker light connector to
connector P130.
(10) Install lockwasher, terminal lug TL130,
lockwasher, and nut on back of LH door
marker light base.

Change 1 2-548.5

TM 9-2320-365-20-1

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

NO

12.
Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 3098 is faulty. If
continuity is present, LH door
marker light is faulty.

Other marker lights illuminate.
LH door marker light lamp OK.
LH cab marker light illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Is continuity present from
terminal lug TL130 to
terminal lug TL133?

Repair wire 3098 from terminal lug
TL130 to terminal lug TL133 (para 2-40)
or replace LH door and cab marker lights
cable assembly (para 7-54).

YES

Repair wire 3098 from terminal lug
TL 133 to terminal lug TL87 (para 2-40)
or replace LH door and cab marker lights
cable assembly (para 7-54).

TM 9-2320-365-20-1

2-548.6 Change 1

CONTINUITY TEST
(1) Remove four screws from LH cab marker
light base.
NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(2) Remove nut, lockwasher, terminal lug
TL133, and lockwasher from LH cab
marker light base. Discard
lockwashers.
(3) Extend base and disconnect connector
P129 from marker light connector.
(4) Remove gasket from LH cab marker light
base. Discard gasket.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to terminal lug TL130.
(7) Connect negative (-) probe of multimeter
to terminal lug TL133 and note reading
on multimeter.
(8) If continuity is not present, repair wire
3098 from terminal lug TL130 to terminal
lug TL133 (para 2-40) or replace LH door
and cab marker lights cable assembly
(para 7-54).
(9) If continuity is present, replace LH door
marker light (para 7-31).
(10) Install gasket on LH cab marker light base.
(11) Connect marker light connector to
connector P129.
(12) Install lockwasher, terminal lug TL133,
lockwasher, and nut on back of LH cab
marker light base.
(13) Install LH cab marker light base on vehicle
with four screws.
(14) Install LH cab marker light lamp in socket.
(15) Install lens cover on base with two
screws.
(16) Install gasket on LH door marker light
base.
(17) Connect marker light connector to
connector P130.
(18) Install lockwasher, terminal lug TL130,
lockwasher, and nut on back of LH door
marker light base.
(19) Install LH door marker light base on vehicle
with four screws.
(20) Install LH door marker light lamp in socket.
(21) Install lens cover on base with two
screws.

Change 1 2-549

TM 9-2320-365-20-1

e44. LH DOOR AND/OR LH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

13.

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89
Other marker lights illuminate.
LH door marker light lamp OK.
LH cab marker light illuminates.

Is 12 VDC present at
connector P130 socket?

If 12 VDC is not present, wire
1949 is faulty. If 12 VDC is
present, LH door and cab
marker light cable assembly
is faulty.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty LH door and cab marker
lights cable assembly.

Repair wire 1949 from connector P130
socket to splice E25 (para 2-40) or
replace LH door and cab marker lights
cable assembly (para 7-54) and replace
LH door marker light (para 7-31).

YES

Replace LH door and cab marker
lights cable assembly (para 7-54).

TM 9-2320-365-20-1

2-550 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(10) Install lockwasher, terminal lug TL130,
lockwasher, and nut on back of LH door
marker light base.
(11) Install LH door marker light base on
vehicle with four screws.
(12) Install LH door marker light lamp in socket.
(13) Install lens cover on base with two
screws.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector P130 socket.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 12 VDC is not present, repair wire 1949
from connector P130 socket to splice
E25 (para 2-40) or replace LH door and
cab marker lights cable assembly (para
7-54) and replace LH door marker light
(para 7-31).
(6) If 12 VDC is present, replace LH door
and cab marker light cable assembly
(para 7-54).
(7) Position main light switch to OFF (TM 9-
2320-365-10).
(8) Install gasket on LH door marker light
base.
(9) Connect marker light connector to
connector P130.

Change 1 2-551

TM 9-2320-365-20-1

NO

YES

2.

Is continuity present
through RH cab
marker light lamp?

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

YES

NO

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE

Go to step 4 of this fault.

Replace RH cab marker
light lamp (para 7-31).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICR-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-552 Change 1

Other marker lights illuminate.
RH door marker light
illuminates.

Faulty lamp.
Faulty marker light.
Faulty RH door and cab marker
lights cable assembly.

Continuity Test or
STE/ICE-R Test #91

If continuity is not present, RH
cab marker light lamp is faulty.

START

1.

Does RH door marker
light illuminate?

TEST OPTIONS

Operational Test

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Other marker lights illuminate.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty RH door and cab marker
lights cable assembly.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-23230-365-10).

Personnel Required
(2)

Materials/Parts
Lockwasher (4) (Item 70, Appendix G)
Gasket (2) (Item 23, Appendix G)

CONTINUITY TEST

(1) Remove two screws and lens cover from RH
cab marker light base.
(2) Remove RH cab marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH marker light
lamp and note reading on multimeter.
(5) If continuity is not present, replace RH
cab marker light lamp (para 7-31).

Change 1 2-553

TM 9-2320-365-20-1

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If RH door marker light lamp does not
illuminate, go to step 4 of this fault.
(3) Position main light switch to OFF
(TM 9-2320-365-10).

3.
KNOWN INFO
TEST OPTIONS

NO

YES

Replace RH cab marker
light (para 7-31).

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

Is 12 VDC present at
connector P132
socket?

Repair wire 1947 from connector
P132 socket to splice E22 (para 2-40)
or replace RH door and cab marker
lights cable assembly (para 7-57).

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-554 Change 1

Other marker lights illuminate.
RH door marker light
illuminates.
RH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab marker
lights cable assembly.

REASON FOR QUESTION

If 12 VDC is not present, wire
1947 is faulty.

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

NOTE

(1) Remove four screws from RH cab marker
light base.

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(2) Remove nut, lockwasher, terminal lug
TL134, and lockwasher from RH cab
marker light base. Discard lockwashers.
(3) Extend base and disconnect connector
P132 from marker light connector.
(4) Remove gasket from RH cab marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P132 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 12 VDC is not present, repair wire 1947
from connector P132 socket to splice E22
(para 2-40) or replace RH door and cab
marker lights cable assembly (para 7-57).
(10) If 12 VDC is present, replace RH cab
marker light (para 7-31).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Install gasket on RH cab marker light base.
(13) Connect marker light connector to
connector P132.

(14) Install lockwasher, terminal lug TL134,
lockwasher, and nut on back of RH cab
marker light base.
(15) Install RH cab marker light base on vehicle
with four screws.
(16) Install RH cab marker light lamp in socket.
(17) Install lens cover on base with two
screws.

Change 1 2-555

TM 9-2320-365-20-1

VOLTAGE TEST (Cont)

4.

Is continuity present
through RH door marker
light lamp?

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

NO

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

5.

Does RH cab marker
light illuminate?

TEST OPTIONS

REASON FOR QUESTION

YES

Continuity Test or
STE/ICE-R Test #91

Replace RH door marker
light lamp (para 7-31).

Go to step 8 of this fault.

Other marker lights
illuminate.

Faulty lamp.
Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

Other marker lights
illuminate.
RH door marker light
lamp OK.

Faulty lamp.
Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

If continuity is not present,
RH door marker light lamp
is faulty.

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Operational Test

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-556 Change 1

CONTINUITY TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If RH cab marker light lamp does not
illuminate, go to step 8 of fault.
(3) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Remove two screws and lens cover from RH
door marker light base.
(2) Remove RH door marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH door marker
light lamp and note reading on multimeter.
(5) If continuity is present, replace RH door
marker light lamp (para 7-31).

Change 1 2-556.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

6.

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

Other marker lights
illuminate.
RH door marker light
illuminates.
RH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

If 12 VDC is not present, wire
1947 is faulty.

Is 12 VDC present at
connector P131
socket?

Repair wire 1947 from connector
P131 socket to splice E22 (para 2-40)
or replace RH door and cab marker
lights cable assembly (para 7-57).

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-556.2 Change 1

VOLTAGE TEST
(1) Remove four screws from RH door marker
light base.

Do not let wires slip through
hole into cab structure. If wires
slip into cab structure, vehicle
will need further disassembly
to retrieve wires.

NOTE

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(2) Remove nut, lockwasher, terminal lug TL131,
and lockwasher from RH door marker light
base. Discard lockwashers.
(3) Extend base and disconnect connector P131
from marker light connector.
(4) Remove gasket from RH door marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P131 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 12 VDC is not present, repair wire 1947
from connector P131 socket to splice
E22 (para 2-40) or replace RH door and cab
marker lights cable assembly (para 7-57).
(10) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-556.3

TM 9-2320-365-20-1

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

NO

YES

7.

Is continuity present from
terminal lug TL134 to
terminal lug TL131?

Replace RH door marker
light (para 7-31).

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 3096 is faulty. If
continuity is present, RH
door marker light is faulty.

Other marker lights
illuminate.
RH door marker light lamp
OK.
RH cab marker light
illuminates.

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

Repair wire 3096 from terminal
lug TL134 to terminal lug 131
(para 2-40) or replace RH door
and cab marker lights cable
assembly (para 7-57).

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-556.4 Change 1

NOTE

Do not let wires slip through
hole into cab structure. If wires
slip into cab structure, vehicle
will need further disassembly
to retrieve wires.

CONTINUITY TEST

(1) Remove two screws and lens cover from RH
cab marker light base.
(2) Remove RH cab marker light lamp from
socket.
(3) Remove four screws from RH cab marker
light base.

(5) Extend base and disconnect connector P132
from marker light connector.
(6) Remove gasket from RH cab marker light
base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to terminal lug TL131.
(9) Connect negative (-) probe of multimeter
to terminal lug TL134 and note reading
on multimeter.
(10) If continuity is not present, repair wire
3096 from terminal lug TL131 to terminal
lug TL134 (para 2-40) or replace RH door
and cab marker lights cable assembly
(para 7-57).
(11) If continuity is present, replace RH door
marker light (para 7-31).
(12) Install gasket on RH cab marker light base.
(13) Connect marker light connector to connector
P132.
(14) Install lockwasher, terminal lug TL134,
lockwasher, and nut on back of RH cab
marker light base.

Change 1 2-557

TM 9-2320-365-20-1

(15) Install RH cab marker light base on vehicle
with four screws.
(16) Install RH cab marker light lamp in socket.
(17) Install lens cover on base with two screws.
(18) Install gasket on RH cab marker light base.
(19) Connect marker light connector to connector
P131.
(20) Install lockwasher, terminal lug TL131,
lockwasher, and nut on back of base.
(21) Install RH door marker light base on vehicle
with four screws.
(22) Install RH door marker light lamp in socket.
(23) Install lens cover on base with two screws.

(4) Remove nut, lockwasher, terminal lug TL134,
and lockwasher from RH cab marker light
base. Discard lockwashers.

KNOWN INFO

POSSIBLE PROBLEMS

KNOWN INFO

POSSIBLE PROBLEMS

Other marker lights
illuminate.
RH door marker light
lamp OK.

Faulty lamp.
Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

Other marker lights
illuminate.
RH door marker light
lamp OK.
RH cab marker light
lamp OK.

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

If continuity is not present,
RH cab marker light lamp
is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
terminal lug TL131
to ground?

YES

NO

REASON FOR QUESTION

TEST OPTIONS
9.

YES

NO

REASON FOR QUESTION

TEST OPTIONS

Is continuity present
through RH cab marker
light lamp?

8.

Go to step 12 of this fault.

Continuity Test or
STE/ICE-R Test #91

This question eliminates
possible problems and
determines where
troubleshooting continues.

Replace RH cab marker
light lamp (para 7-31).

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-558 Change 1

CONTINUITY TEST

CONTINUITY TEST

(1) Remove two screws and lens cover from
RH door marker light base.
(2) Remove RH door marker light lamp from
socket.
(3) Remove four screws from RH door marker
light.
NOTE

Do not let wires slip through
hole into cab structure. If wires
slip into cab structure, vehicle
will need further disassembly
to retrieve wires.

(4) Remove nut, lockwasher, terminal lug TL131,
and lockwasher from RH door marker light
base. Discard lockwashers.
(5) Extend base and disconnect connector
P131 from marker light connector.
(6) Remove gasket from RH door marker light
base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter to
terminal lug TL131.
(9) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(10) If continuity is not present from terminal lug
TL131 to ground, go to step 12 of this fault.

(1) Remove two screws and lens cover from
RH cab marker light base.
(2) Remove RH cab marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH cab marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace RH cab
marker light lamp (para 7-31).

Change 1 2-559

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

10.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

NO

Voltage Test or
STE/ICE-R Test #89

Go to step 13 of this fault.

Other marker lights
illuminate.
RH door marker light
illuminates.
RH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 VDC present at
connector P132
socket?

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-560 Change 1

WARNING

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(14) Install RH cab marker light base on vehicle
with four screws.
(15) Install RH cab marker light lamp in socket.
(16) Install lens cover on base with two
screws.

Change 1 2-560.1

TM 9-2320-365-20-1

VOLTAGE TEST (Cont)

NOTE

(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Install gasket on RH cab marker light base.
(12) Connect marker light connector to connector
P132.
(13) Install lockwasher, terminal lug TL134,
lockwasher, and nut on back of RH cab
marker light base.

(1) Remove four screws from RH cab marker
light base.

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(2) Remove nut, lockwasher, terminal lug
TL134, and lockwasher from RH cab
marker light base. Discard lockwashers.
(3) Extend base and disconnect connector
P132 from marker light connector.
(4) Remove gasket from RH cab marker light
base. Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to connector P132 socket.
(7) Connect negative (-) probe of multimeter
to ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(9) If 12 VDC is not present, go to step 13 of
this fault.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

11.

Replace RH cab marker light
and RH door marker light
(para 7-31).

Voltage Test or
STE/ICE-R Test #89

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Other marker lights
illuminate.
RH door marker light
illuminates.
RH cab marker light lamp OK.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

If 12 VDC is not present, wire
1947 is faulty.

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Is 12 VDC present at
connector P131
socket?

Repair wire 1947 from connector
P131 socket to splice E22 (para 2-40)
or replace RH door and cab marker
lights cable assembly (para 7-57).

TM 9-2320-365-20-1

2-560.2 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-560.3

TM 9-2320-365-20-1

(11) Install RH door marker light base on vehicle
with four screws.
(12) Install RH door marker light lamp in socket.
(13) Install lens cover on base with two screws.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector P132 socket.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1947
from connector P132 socket to splice
E22 (para 2-40) or replace RH door and cab
marker lights cable assembly (para 7-57).
(6) If 12 VDC is present, replace RH cab marker
light and RH door marker light (para 7-31).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Install gasket on RH door marker light base.
(9) Connect marker light connector to
connector P132.
(10) Install lockwasher, terminal lug TL134,
lockwasher, and nut on back of RH door
marker light base.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

12.

NO

Is continuity present from
terminal lug TL134 to
terminal lug TL131?

Repair wire 3096 from terminal lug
TL134 to terminal lug TL71 (para 2-40)
or replace RH door and cab marker lights
cable assembly (para 7-57).

Continuity Test or
STE/ICE-R Test #91

Repair wire 3096 from terminal
lug TL134 to terminal lug TL131
(para 2-40) or replace RH door
and cab marker lights cable
assembly (para 7-57).

If continuity is not present,
wire 3096 is faulty. If
continuity is present, RH
door marker light is faulty.

Other marker lights
illuminate.
RH door marker light lamp OK.
RH cab marker light
illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-560.4 Change 1

CONTINUITY TEST

(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to terminal lug TL131.
(7) Connect negative (-) probe of multimeter
to terminal lug TL134 and note reading
on multimeter.
(8) If continuity is not present, repair wire
3096 from terminal lug TL134 to terminal
lug TL131 (para 2-40) or replace RH door
and cab marker lights cable assembly
(para 7-57).
(9) If continuity is present, replace RH door
marker light (para 7-31).
(10) Install gasket on RH cab marker light base.
(11) Connect marker light connector to
connector P132.
(12) Install lockwasher, terminal lug TL134,
lockwasher, and nut on back of RH cab
marker light base.
(13) Install RH cab marker light base on vehicle
with four screws.
(14) Install RH cab marker light lamp in socket.
(15) Install lens cover on base with two screws.

Change 1 2-560.5

TM 9-2320-365-20-1

(3) Extend base and disconnect connector P132
from marker light connector.
(4) Remove gasket from RH cab marker light
base. Discard gasket.

(2) Remove nut, lockwasher, terminal lug TL134,
and lockwasher from RH cab marker light
base. Discard lockwashers.

NOTE

Do not let wires slip through
hole into cab structure. If wires
slip into cab structure, vehicle
will need further disassembly
to retrieve wires.

(1) Remove four screws from RH cab marker
light base.

(16) Install gasket on RH door marker light base.
(17) Connect marker light connector to
connector P131.
(18) Install lockwasher, terminal lug TL131,
lockwasher, and nut on back of RH door
marker light base.
(19) Install RH door marker light base on vehicle
with four screws.
(20) Install RH door marker light lamp in socket.
(21) Install lens cover on base with two screws.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

13.

YES

NO

Voltage Test or
STE/ICE-R Test #89

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Other marker lights illuminate.
RH door marker light lamp OK.
RH cab marker light
illuminates.

POSSIBLE PROBLEMS

Faulty marker light.
Faulty RH door and cab
marker lights cable
assembly.

Is 12 VDC present at
connector P131 socket?

e45. RH DOOR AND/OR RH FRONT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

If 12 VDC is not present, wire
1947 is faulty. If 12 VDC is
present, RH door and cab
marker light cable assembly
is faulty.

Repair wire 1947 from connector P132
socket to splice E22 (para 2-40) or
replace RH door and cab marker lights
cable assembly (para 7-57) and replace
RH door marker light (para 7-31).

Replace RH door and cab marker
lights cable assembly (para 7-57).

TM 9-2320-365-20-1

2-560.6 Change 1

VOLTAGE TEST

Change 1 2-561

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to connector P131 socket.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1947
from connector P131 socket to splice
E22 (para 2-40) or replace RH door and cab
marker lights cable assembly (para 7-57).
(6) If 12 VDC is present, replace RH door
and cab marker light cable assembly
(para 7-57).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Install gasket on RH door marker light base.
(9) Connect marker light connector to connector
P131.
(10) Install lockwasher, terminal lug TL131,
lockwasher, and nut on back of RH door
marker light base.
(11) Install RH door marker light base on
vehicle with four screws.
(12) Install RH door marker light lamp in socket.
(13) Install lens cover on base with two screws.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

1.

Do any of the cab top
marker lights illuminate?

KNOWN INFO
TEST OPTIONS

POSSIBLE PROBLEMS

YES

NO

2.
KNOWN INFO

NO

YES

Is continuity present
through lamp?
POSSIBLE PROBLEMS

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Go to step 5 of this fault.

Replace lamp (para 7-31).

TM 9-2320-365-20-1

2-562 Change 1

Other marker lights illuminate.

Faulty lamp.
Faulty marker light assembly.
Faulty cab clearance and
marker lights cable assembly.
Faulty M1081 cab clearance
and marker lights upper cable
assembly.

Other marker lights illuminate.
Lamp OK.

Faulty lamp.
Faulty marker light.
Faulty RH door and cab marker
lights cable assembly.

Operational Test

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

If continuity is not present,
lamp is faulty.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICR-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-23230-365-10).

Personnel Required
(2)

Materials/Parts
Lockwasher (4) (Item 71, Appendix G)
Gasket (2) (Item 28, Appendix G)
Wire, Elec, 50 ft (Item 77, Appendix D)

START

CONTINUITY TEST

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If no cab top marker lights illuminate,
go to step 5 of this fault.
(3) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Remove two screws and lens cover from
marker light base.
(2) Remove marker light lamp from socket.
(3) Set multimeter to ohms.
(4) Check continuity through marker light
lamp and note reading on multimeter.
(5) If continuity is not present, replace marker
light lamp (para 7-31).

Change 1 2-563

TM 9-2320-365-20-1

KNOWN INFO
3.
TEST OPTIONS

REASON FOR QUESTION

NO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

YES

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Voltage Test or
STE/ICE-R Test #89

Other marker lights illuminate.
Lamp OK.
POSSIBLE PROBLEMS

Faulty marker light assembly.
Faulty cab clearance and
marker lights cable assembly.
Faulty M1081 cab clearance
and marker lights upper
cable assembly.

If 12 VDC is not present, wire
1951 is faulty.

2-564 Change 1

TM 9-2320-365-20-1

Repair wire 1951 from connector (refer to
Table 2-11.1. Cab Clearance and Marker Light
Connectors) (para 2-40) or replace cab
clearance and marker lights cable assembly
(para 7-59) or M1081 cab clearance and marker
lights upper cable assembly (para 7-56).

Is 12 VDC present at
connector (refer to Table
2-11.1. Cab Clearance and
Marker Light Connectors)
Socket 1?

WARNING

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-565

TM 9-2320-365-20-1

VOLTAGE TEST

Do not let wires slip through
hole into cab structure. If wires
slip into cab structure, vehicle
will need further disassembly
to retrieve wires.

(1) Remove four screws from marker light base.

Marker/ID Light
Connector
Wire Segment

RH Cab Top Marker
Light
P55
P55 to splice E23

RH Cab Top ID Light

Middle Cab Top ID
Light

LH Cab Top ID Light

LH Cab Top Marker
Light
P50

P57

P60

P59
P59 to splice E23

P60 to splice E23

P57 to splice E23

P50 to splice E23

Table 2-11.1. Cab Clearance and Marker Light Connectors

NOTE

(9) If 12 VDC is not present, repair wire 1951b
from connector (refer to Table 2-11.1. Cab
Clearance and Marker Light Connectors) d
(para 2-40) or replace cab clearance and or
marker lights cable assembly (para 7-59) or
M1081 cab clearance and marker lights upper
cable assembly (para 7-56).
(10) Position main light switch to OFF

(2) Remove nut, lockwasher, terminal lug
(refer to Table 2-11.1. Cab Clearance and
Marker Light Terminal Lugs), and
lockwasher from marker light base. Discard
lockwashers.
(3) Extend base and disconnect connector
(refer to Table 2-11.1. Cab Clearance and
Marker Light Connectors) from marker light
connector.
(4) Remove gasket from marker light base.
Discard gasket.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter to
connector (refer to Table 2-11.1. Cab
Clearance and Marker Light Connectors).
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.

(TM 9-2320-365-10).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

4.

Replace marker light
assembly (para 7-31).

e46. ONE OR MORE TOP CAB MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Lamp OK.
POSSIBLE PROBLEMS

Faulty marker light assembly.
Faulty cab clearance and
marker lights cable assembly.
Faulty M1081 cab clearance
and marker lights upper
cable assembly.

If continuity is not present,
wire 3097 is faulty. If
continuity is present, marker
light is faulty.

NO

TM 9-2320-365-20-1

2-566 Change 1

Is continuity present from
terminal lug (refer to Table
2-11.2. Cab Clearance and
Marker Light Terminal Lugs)
to ground?

Repair wire 3097 from terminal lug
(refer to Table 2-11.2. Cab Clearance and
Marker Light Terminal Lugs) (para 2-40)
or replace cab clearance and marker lights
cable assembly (para 7-59) or M1081 cab
clearance and marker lights upper cable
assembly (para 7-56).

Change 1 2-567

TM 9-2320-365-20-1

CONTINUITY TEST

Light

Table 2-11.2. Cab Clearance and Marker Light Terminal Lugs

Terminal Lug
Wire Segment

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug (refer to Table 2-11.2. Cab
Clearance and Marker Light Terminal Lugs).
(3) Connect negative (-) probe of multimeter to
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3097 (para 2-40) or replace cab clearance
and marker lights cable assembly (para
7-59) or M1081 cab clearance and marker
lights upper cable assembly (para 7-56).
(5) If continuity is present, replace marker light
assembly (para 7-31).
(6) Install gasket on marker light base.
(7) Connect connector (refer to Table 2-11.2.
Cab Clearance and Marker Light
Connectors) to marker light connector.
(8) Install lockwasher, terminal lug (refer to
Table 2-11.2. Cab Clearance and Marker
Light Terminal Lugs), lockwasher, and nut
on back of base.
(9) Install marker light base on vehicle with four
screws.
(10) Install marker light lamp in socket.
(11) Install lens cover on base with two screws.

RH Cab Top Marker Light
RH Cab Top ID Light
Middle Cab Top ID Light
LH Cab Top ID Light
LH Cab Top Marker Light

TL3
TL4
TL8
TL22
TL27

TL3 to splice E24
TL4 to splice E24
TL8 to splice E24
TL22 to splice E24
TL27 to splice E24

KNOWN INFO
TEST OPTIONS

YES

NO

5.

POSSIBLE PROBLEMS
Is vehicle model
M1081?

e46. ONE OR MORE TOP CAB MARKER LIGHTS DO NOT ILLUMINATE (CONT)

REASON FOR QUESTION

No cab top marker lights
illuminate.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Visual Inspection

Go to step 9 of this fault.

TM 9-2320-365-20-1

2-568 Change 1

Faulty cab clearance and
marker lights cable assembly.
Faulty M1081 cab clearance
and marker lights lower cable
assembly.
Faulty M1081 cab clearance
and marker lights upper cable
assembly.

(1) Is vehicle model M1081? If vehicle
is not model M1081, go to step 9
of this fault.

Change 1 2-569

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

6.

POSSIBLE PROBLEMS
Is 12 VDC present at
connector P3
socket 1?

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE (CONT)

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present, wire
1951 is faulty.

No cab top marker lights
illuminate.

Faulty M1081 cab clearance
and marker lights lower
cable assembly.
Faulty M1081 cab clearance
and marker lights upper
cable assembly.

Repair wire 1951 from connector P3
socket 1 to terminal lug TL74 (para 2-
40) or replace M1081 cab clearance
and marker lights lower cable
assembly (para 7-55).

TM 9-2320-365-20-1

2-570 Change 1

CAUTION

WARNING

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Disconnect connector P3 from connector J3.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P3 socket 1.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 VDC is not present, repair wire 1951
(para 2-40) from connector P3 socket 1 to
terminal lug TL74 or replace M1081cab
clearance and marker lights lower cable
assembly (para 7-55).
(7) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-571

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

POSSIBLE PROBLEMS

7.

Is continuity present from
connector P3 pin 2 to
ground?

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

CAUTION
Read CAUTION
on following page.

If continuity is not present,
wire 3097 is faulty.

No cab top marker lights
illuminate.

Faulty M1081 cab clearance
and marker lights lower
cable assembly.
Faulty M1081 cab clearance
and marker lights upper
cable assembly.

Repair wire 3097 from connector P3
pin 2 to terminal lug TL86 (para 2-
40) or replace M1081 cab clearance
and marker lights lower cable
assembly (para 7-55).

TM 9-2320-365-20-1

2-572 Change 1

CONTINUITY TEST

CAUTION

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P3 pin 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3097
(para 2-40) from connector P3 pin 2 to
terminal lug TL86 or replace M1081
cab clearance and marker lights lower cable
assembly (para 7-55).

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Change 1 2-573

TM 9-2320-365-20-1

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 1951 from connector J3
pin 1 to splice E23 (para 2-40) or
replace M1081 cab clearance
and marker lights upper cable
assembly (para 7-56).

TM 9-2320-365-20-1

2-574 Change 1

CAUTION
Read CAUTION
on following page.
8.

Is continuity present from
connector J3 socket 2 to
to terminal lug TL27?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 3097 is faulty. If
continuity is present, wire
1951 is faulty.

KNOWN INFO

No cab top marker lights
illuminate.
M1081 cab clearance and
marker lights lower cable
assembly OK.

POSSIBLE PROBLEMS
Faulty M1081 cab clearance
and marker lights upper
cable assembly.

NO

Repair wire 3097 from connector J3
socket 2 to splice E24 (para 2-40) or
replace M1081 cab clearance and
marker lights upper cable
assembly (para 7-56).

YES

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove two screws and lens cover from
LH cab top marker light base.
(2) Remove LH cab top marker light lamp from
socket.
(3) Remove four screws from LH cab top
marker light base.

NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(4) Remove nut, lockwasher, terminal lug
TL27, and lockwasher from LH cab top
marker light base. Discard lockwashers.
(5) Extend base and disconnect marker light
connector from connector P50.
(6) Remove gasket from LH cab top marker
light base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to connector J3 socket 2.
(9) Connect negative (-) probe of multimeter
to terminal lug TL27 and note reading on
multimeter.
(10) If continuity is not present, repair wire
3097 from connector J3 socket 2 to splice
E24 (para 2-40) or replace M1081 cab
clearance and marker lights upper cable
assembly (para 7-56).
(11) If continuity is present, repair wire 1951
from connector J3 pin 1 to splice E23
(para 2-40) or replace M1081 cab
clearance and marker lights upper cable
assembly (para 7-56).
(12) Install gasket on LH cab top marker
light base.
(13) Connect marker light connector to
connector P50.
(14) Install lockwasher, terminal lug TL27,
lockwasher, and nut on back of LH cab
top marker light base.

Change 1 2-574.1

(15) Install LH cab top marker light base on
vehicle with four screws.
(16) Install LH cab top marker light lamp in
socket.
(17) Install lens cover on base with two screws.
(18) Connect connector P3 to connector J3.

CONTINUITY TEST (Cont)

e46. ONE OR MORE CAB TOP MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 1951 from terminal lug TL74
to splice E23 (para 2-40) or replace cab
clearance and marker lights cable
assembly (para 7-59).

TM 9-2320-365-20-1

2-574.2 Change 1

9.

Is continuity present from
terminal lug TL3 to
ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO
No cab top marker lights
illuminate.
POSSIBLE PROBLEMS
Faulty cab clearance and
marker lights cable
assembly.

NO

Repair wire 3097 from terminal lug TL86
to splice E24 (para 2-40) or replace cab
clearance and marker lights cable
assembly (para 7-59).

YES

If continuity is not present,
wire 3097 is faulty. If
continuity is present, wire
1951 is faulty.

CONTINUITY TEST

Change 1 2-575

TM 9-2320-365-20-1

(1) Remove two screws and lens cover from
RH cab top marker light base.
(2) Remove RH cab top marker lamp from
socket.
(3) Remove four screws from RH cab top
marker light base.

NOTE

Do not let wires slip through hole into
cab structure. If wires slip into cab
structure, vehicle will need further
disassembly to retrieve wires.

(4) Remove nut, lockwasher, terminal lug
TL3, and lockwasher from RH cab top
marker light base. Discard lockwashers.
(5) Extend base and disconnect marker light
connector from connector P55.
(6) Remove gasket from RH cab top marker
light base. Discard gasket.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to terminal lug TL3.
(9) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(10) If continuity is not present, repair wire
3097 from terminal lug TL86 to splice E24
(para 2-40) or replace cab clearance and
marker lights cable assembly (para 7-59).
(11) If continuity is present, repair wire 1951
from terminal lug TL74 to splice E23
(para 2-40) or replace cab clearance and
marker lights cable assembly (para 7-59).

(12) Install gasket on RH cab top marker
light base.
(13) Connect connector P55 to marker light
connector.
(14) Install lockwasher, terminal lug TL3,
lockwasher, and nut on back of RH cab
top marker light base.
(15) Install RH cab top marker light base on
vehicle with four screws.
(16) Install RH cab top marker light lamp in
socket.
(17) Install lens cover on RH cab top marker
light base with two screws.

YES

2.
KNOWN INFO

1.

START

KNOWN INFO

Go to step 12 of this fault.

NO

Does more than one side or
rear marker light not
illuminate?

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE

Does any side or rear
marker lights illuminate?

REASON FOR QUESTION

Visual Inspection

TEST OPTIONS

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Lockwasher (6) (Item 71, Appendix G)
Ties, Cable, Plastic (Item 76, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICR-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

NO

Go to step 13 of this fault.
YES

Other marker lights illuminate.
Rear composite lights
illuminate.
POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

2-576 Change 1

TM 9-2320-365-20-1

If only one side and/or rear marker light does
not illuminate, go to step 13 of this fault.

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Note side and/or rear marker light(s) that
do not illuminate.
(3) If all side and/or rear marker lights do not
illuminate, go to step 12 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-577

TM 9-2320-365-20-1

KNOWN INFO

YES

KNOWN INFO

NO

YES

3.

4.

Is rear carrier equipped
with two marker lights?

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

Go to step 16 of this fault.

NO

Go to step 29 of this fault.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Do both LH side and rear
marker lights illuminate?

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker lamp.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-578 Change 1

If both LH side and rear marker lights do not
illuminate, go to step 16 of this fault.

If rear carrier is equipped with one marker
light, go to step 29 of this fault.

Change 1 2-578.1

TM 9-2320-365-20-1

YES

KNOWN INFO

YES

5.

6.

Do any of the three rear
marker lights illuminate?

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Go to step 20 of this fault.

NO

KNOWN INFO
TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Do both RH side and rear
marker lights illuminate?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker lamp.
Faulty rear lights cable
assembly.

Repair wire 3094 from splice E21
to terminal lug TL32 (para 2-40) and
go to step 6 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1
of this fault.

TM 9-2320-365-20-1

2-578.2 Change 1

If both RH side and rear marker lights do not
illuminate, go to step 20 of this fault.

If all three marker lights do not illuminate, repair
wire 3094 from splice E21 to terminal lug TL32
(para 2-40) and go to step 6 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.

Change 1 2-578.3

TM 9-2320-365-20-1

KNOWN INFO

YES

KNOWN INFO

NO

YES

7.

8.

Does the middle rear marker
light illuminate?

Go to step 26 of this fault.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Go to step 24 of this fault.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Does the RH rear marker
light illuminate?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-578.4 Change 1

If the RH rear marker light does not illuminate,
go to step 24 of this fault.

If the middle rear marker light does not illuminate,
go to step 26 of this fault.

Change 1 2-578.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS
9.

REASON FOR QUESTION

YES

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

Replace LH rear marker
light lamp (para 7-31).

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Is continuity present
through LH rear marker
light lamp?
If continuity is not present, LH
rear marker light lamp is faulty.

TM 9-2320-365-20-1

2-578.6 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
LH rear marker light base.
(2) Remove LH rear marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH rear marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace LH rear
marker light lamp (para 7-31).
(6) Install LH rear marker light lamp in socket.
(7) Install lens cover on LH rear marker light
base with two screws.

Change 1 2-578.7

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

10.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89

Repair wire 489 from connector P54
to splice E15 (para 2-40) or replace
rear lights cable assembly (para 7-75).

Is 12 VDC present at
connector P54?

If 12 VDC is not present, wire
489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-578.8 Change 1

VOLTAGE TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P54 from LH rear
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P54.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P54 to splice E15
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Connect LH rear marker light connector
to connector P54.

Change 1 2-578.9

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

11.

Is continuity present
from terminal lug TL30
to terminal lug TL31?

YES

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

Repair wire 3094 from terminal lug TL30
to terminal lug TL31 (para 2-40) or replace
rear lights cable assembly (para 7-75).

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace LH rear marker
light (para 7-31).

If continuity is not present,
wire 3094 is faulty. If
continuity is present, LH rear
marker light is faulty.

TM 9-2320-365-20-1

2-578.10 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL30,
and lockwasher from LH rear marker light
screw. Discard lockwashers.
(2) Remove nut, lockwasher, terminal lug TL31,
and lockwasher from middle rear marker
light screw. Discard lockwashers.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
terminal lug TL30.
(5) Connect negative (-) probe of multimeter to
terminal lug TL31 and note reading on
multimeter.
(6) If continuity is not present, repair wire 3094
from terminal lug TL30 to terminal lug TL31
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) If continuity is present, replace LH rear
marker light (para 7-31).

Change 1 2-578.11

TM 9-2320-365-20-1

(8) Install lockwasher, terminal lug TL31,
lockwasher, and nut on middle rear
marker light screw.
(9) Install lockwasher, terminal lug TL30,
lockwasher, and nut on LH rear marker
light screw.
(10) Install LH rear marker light lamp in socket.
(11) Install lens cover on LH rear marker light
base with two screws.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

Repair wire 489 from connector P51
socket 7 to splice E15 (para 2-40) or
replace rear lights cable assembly
(para 7-75).

TM 9-2320-365-20-1

2-578.12 Change 1

CAUTION
Read CAUTION
on following page.
12.

Is continuity present
from connector J51 pin 7
to terminal board TB1
position 11?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
If continuity is not present,
wire 489 is faulty.

KNOWN INFO
Other marker lights illuminate.
Rear composite lights
illuminate.
POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.

NO

Repair wire 489 from connector J51 pin 7
to terminal board TB1 position 11 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

YES

Change 1 2-578.13

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove PDP cover (para 16-2).
(3) Remove three screws and washers from
PDP.
(4) Remove three screws from PDP.
(5) Lift PDP outward to gain access.
(6) Disconnect connector P51 from connector
J51.
(7) Set multimeter to ohms.
(8) Connect positive (+) probe of multimeter
to connector J51 pin 7.
(9) Connect negative (-) probe of multimeter
to terminal board TB1 position 11 and note
reading on multimeter.
(10) If continuity is not present, repair wire 489
from connector J51 pin 7 to terminal board
TB1 position 11 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(11) If continuity is present, repair wire 489
from connector P51 socket 7 to splice
E15 (para 2-40) or replace rear lights
cable assembly (para 7-75).
(12) Connect connector J51 to connector P51.
(13) Install PDP on dashboard with three
screws.
(14) Install three washers and screws in PDP.
(15) Install PDP cover (para 16-2).
(16) Connect batteries (para 7-48).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

13.

Is continuity present
through marker light
lamp?

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
marker light lamp is faulty.

Replace marker light
lamp (para 7-31).

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-578.14 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
marker light base.
(2) Remove marker light lamp from socket.
(3) Set multimeter to ohms.
(4) Check continuity through marker light lamp
and note reading on multimeter.
(5) If continuity is not present, replace marker
light lamp (para 7-31).
(6) Install marker light lamp in socket.
(7) Install lens cover on marker light base with
two screws.

Change 1 2-579

TM 9-2320-365-20-1

YES

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-580 Change 1

Repair wire 489 (refer to Table 2-12. Side
and Rear Marker Light Connectors)
(para 2-40) or replace rear lights cable
assembly (para 7-75).

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
14.

Is 12 VDC present at
connector?

KNOWN INFO

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

NO

REASON FOR QUESTION

If 12 VDC is not present, wire
489 is faulty.

Change 1 2-581

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Marker Light

LH Side
LH Rear
Left Rear
Middle Rear
Right Rear
RH Rear

Connector

P85
P86
P54
P56
P58

RH Side

P89
P88

Connector P85 to Splice E16
Connector P86 to Splice E15
Connector P54 to Splice E15
Connector P56 to Splice E15
Connector P58 to Splice E15
Connector P89 to Splice E17
Connector P88 to Splice E17

Wire 489 Segment

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

VOLTAGE TEST

(1) Disconnect marker light connector from
connector (refer to Table 2-12. Side
and Rear Marker Light Connectors).
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector (refer to Table 2-12.
Side and Rear Marker Light
Connectors).
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) Position main light switch to OFF
(TM 9-2320-365-10).
(7) If 12 VDC is not present, repair wire 489
(refer to Table 2-12. Side and Rear Marker
Light Connectors) (para 2-40) or replace
rear lights cable assembly (para 7-75).

Table 2-12. Side and Rear Marker Light Connectors

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

KNOWN INFO

YES

Replace marker light
(para 7-31).

15.

Is continuity present
from terminal lug to
ground?

TEST OPTIONS

REASON FOR QUESTION

NO

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-582 Change 1

If continuity is not present,
wire (refer to Table 2-12.1.
Side and Rear Marker Light
Terminal Lugs) is faulty.

Repair wire (refer to Table 2-12.1. Side
and Rear Marker Light Terminal Lugs) (para 2-40)
or replace rear lights cable assembly (para 7-75).

CONTINUITY TEST

Change 1 2-583

TM 9-2320-365-20-1

(1) Remove nut, lockwasher, terminal lug, and
lockwasher from marker light screw.
Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to terminal lug (refer to Table 2-12.1 Side
and Rear Marker Light Terminal Lugs).
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire
(refer to Table 2-12.1 Side and Rear
Marker Light Terminal Lugs) (para 2-40) or
replace rear lights cable assembly
(para 7-75).
(6) If continuity is present, replace marker
light (para 7-31).
(7) Install lockwasher, terminal lug,
lockwasher, and nut on marker light screw.
(8) Connect marker light connector to
connector (refer to Table 2-12.1. Side and
Rear Marker Light Connectors).

TL19
Wire 3095 from Terminal Lug
TL19 to Terminal Lug TL20

TL20
Replace Marker Light
(para 7-38)

TL32
Replace Marker Light
(para 7-38)

Replace Marker Light
(para 7-38)
TL31

TL30

Connector

TL15

TL16
Replace Marker Light
(para 7-38)
Wire 3094 from Terminal Lug
TL31 to Terminal Lug TL30

Wire 3094 from Terminal Lug
TL15 to Terminal Lug TL16

Wire Segment

RH Side

RH Rear

Right Rear

Middle Rear

Left Rear

Marker Light

LH Side

LH Rear

Table 2-12.1. Side and Rear Marker Light Terminal Lugs

KNOWN INFO

YES

KNOWN INFO

YES

Does LH side or rear
marker light illuminate?

Does LH side marker light
illuminate?

NO

16.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

17.

NO

Go to step 31 of this fault.

Go to step 32 of this fault.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584 Change 1

If LH side marker light does not illuminate, go
to step 32 of this fault.

If LH side and rear marker lights do not illuminate,
go to step 31 of this fault.

Change 1 2-584.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through LH rear marker
light lamp?

18.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
LH rear marker light lamp
is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace LH rear marker light lamp
(para 7-31) and go to step 5 of this
fault if required.

TM 9-2320-365-20-1

2-584.2 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
LH rear marker light base.
(2) Remove LH rear marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH rear marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace LH rear
marker light lamp (para 7-31) and go to
step 5 of this fault if required.
(6) Install LH rear marker light lamp in socket.
(7) Install lens cover on LH rear marker light
base with two screws.

Change 1 2-584.3

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

YES

19.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P86?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

If 12 VDC is not present, wire
489 is faulty. If 12 VDC is
present, LH rear marker light is
faulty.

Repair wire 489 from connector P86
to splice E16 (para 2-40) and go to
step 5 of this fault if required or replace
rear lights cable assembly (para 7-75)
and go to step 1 of this fault.

Replace LH rear marker light
(para 7-31) and go to step 5 of
this fault if required.

TM 9-2320-365-20-1

2-584.4 Change 1

VOLTAGE TEST

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P86 from LH rear
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P86.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P86 to splice E16
(para 2-40) and go to step 5 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.
(7 If 12 VDC is present, replace LH rear marker
light (para 7-31) and go to step 5 of this
fault if required.
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect LH rear marker light connector to
connector P86.

Change 1 2-584.5

TM 9-2320-365-20-1

KNOWN INFO

YES

KNOWN INFO

NO

YES

Does RH side or rear marker
light illuminate?

Does RH side marker
light illuminate?

20.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

21.

NO

Go to step 35 of this fault.

Go to step 36 of this fault.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.6 Change 1

If RH side marker light does not illuminate,
go to step 36 of this fault.

If RH side or rear marker light does not illuminate,
go to step 35 of this fault.

Change 1 2-584.7

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through RH rear marker
light lamp?

22.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

If continuity is not present, RH
rear marker light lamp is faulty.

Replace RH rear marker
light lamp (para 7-31) and
go to step 6 of this
fault if required.

TM 9-2320-365-20-1

2-584.8 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
RH rear marker light base.
(2) Remove RH rear marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH rear marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace RH rear
marker light lamp (para 7-31) and go to
step 6 of this fault if required.
(6) Install RH rear marker light lamp in socket.
(7) Install lens cover on RH rear marker light
base with two screws.

Change 1 2-584.9

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

YES

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

23.

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P89?

If 12 VDC is not present, wire
489 is faulty. If 12 VDC is
present RH rear marker light
is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Repair wire 489 from connector P89
to splice E17 (para 2-40) and go to
step 6 of this fault if required, or replace
rear lights cable assembly (para 7-75)
and go to step 1 of this fault.

Replace RH rear marker light
(para 7-31) and go to step 6 of
this fault if required.

TM 9-2320-365-20-1

2-584.10 Change 1

VOLTAGE TEST

WARNING

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Disconnect connector P89 from RH rear
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P89.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P89 to splice E17
(para 2-40) and go to step 6 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.
(7) If 12 VDC is present, replace RH rear marker
light (para 7-31) and go to step 6 of this
fault.
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect RH rear marker light connector
to connector P89.

Change 1 2-584.11

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

NO

24.

YES

Is continuity present
through RH rear marker
light lamp?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace RH rear marker light
lamp (para 7-31) and go to step 9
of this fault if required.

If continuity is not present, RH
rear marker light lamp is faulty.

TM 9-2320-365-20-1

2-584.12 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
RH rear marker light base.
(2) Remove RH rear marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH rear marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace RH rear
marker light lamp (para 7-31) and go to
step 9 of this fault if required.
(6) Install RH rear marker light lamp in socket.
(7) Install lens cover on RH rear marker light
base with two screws.

Change 1 2-584.13

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

25.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P58?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace RH rear marker light (para 7-31) and
go to step 8 of this fault if required.

If 12 VDC is not present, wire
489 is faulty. If 12 VDC is
present, RH rear marker light
is faulty.

Repair wire 489 from connector
P58 to splice E15 (para 2-40) and
go to step 8 of this fault if required
or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.

TM 9-2320-365-20-1

2-584.14 Change 1

VOLTAGE TEST

WARNING

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P58 from RH rear
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P58.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P58 to splice E15
(para 2-40) and go to step 8 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.
(7) If 12 VDC is present, replace RH rear
marker light (para 7-31) and go to step 8
of this fault if required.
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect RH rear marker light connector
to connector P58.

Change 1 2-584.15

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through middle rear marker
light lamp?

26.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
middle rear marker light lamp
is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace middle rear marker
light lamp (para 7-31) and go to
step 9 of this fault if required.

TM 9-2320-365-20-1

2-584.16 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from
middle rear marker light base.
(2) Remove middle rear marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through middle rear marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace middle
rear marker light lamp (para 7-31) and
go to step 9 of this fault if required.
(6) Install middle rear marker light lamp in
socket.
(7) Install lens cover on middle rear marker
light base with two screws.

Change 1 2-584.17

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

27.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P56?

If 12 VDC is not present, wire
489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Repair wire 489 from connector P56
to splice E15 (para 2-40) and go to step 9
of this fault if required or replace rear lights
cable assembly (para 7-75) and go to
step 1 of this fault.

TM 9-2320-365-20-1

2-584.18 Change 1

VOLTAGE TEST

WARNING

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P56 from middle rear
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P56.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P56 to splice E15
(para 2-40) and go to step 9 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Connect middle rear marker light connector
to connector P56.

Change 1 2-584.19

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
from terminal lug TL31
to terminal lug TL32?

YES

28.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

If continuity is not present,
wire 3094 is faulty. If
continuity is present, middle
rear marker light is faulty.

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Repair wire 3094 from terminal lug TL31
to terminal lug TL32 (para 2-40) and go to
step 9 of this fault if required or replace
rear lights cable assembly (para 7-75)
and go to step 1 of this fault.

Replace middle rear marker light
(para 7-31) and go to step 9 of this
fault if required.

TM 9-2320-365-20-1

2-584.20 Change 1

CONTINUITY TEST

Change 1 2-584.21

TM 9-2320-365-20-1

(1) Remove nut, lockwasher, terminal lug TL31,
and lockwasher from middle rear marker light
screw. Discard lockwashers.
(2) Remove nut, lockwasher, terminal lug TL32,
and lockwasher from RH rear marker light
screw. Discard lockwashers.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
terminal lug TL31.
(5) Connect negative (-) probe of multimeter to
terminal lug TL32 and note reading on
multimeter.
(6) If continuity is not present, repair wire 3094
from terminal lug TL31 to terminal lug TL32
(para 2-40) and go to step 9 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(7) If continuity is present, replace middle rear
marker light (para 7-31) and go to step 9 of
this fault if required.
(8) Install lockwasher, terminal lug TL32,
lockwasher, and nut on RH rear marker
light screw.
(9) Install lockwasher, terminal lug TL31,
lockwasher, and nut on middle rear marker
light screw.

KNOWN INFO

YES

KNOWN INFO

NO

YES

Go to step 6 of this fault.

Does LH marker light
illuminate?

Does RH marker light
illuminate?

29.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

30.

NO

Go to step 39 of this fault.

Go to step 42 of this fault.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS

Visual Inspection

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.22 Change 1

If LH marker light does not illuminate, go
to step 39 of this fault.

If RH marker light does not illuminate, go
to step 42 of this fault.

Change 1 2-584.23

TM 9-2320-365-20-1

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

KNOWN INFO
31.

Is continuity present
from terminal lug TL16
to ground?

TEST OPTIONS

YES

NO

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS
Faulty rear lights cable
assembly.

If continuity is not present,
wire 3094 is faulty. If
continuity is present, wire 489
is faulty.

Repair wire 489 from splice E15 to splice E16
(para 2-40) and go to step 5 of this fault
if required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.

Repair wire 3094 from terminal lug TL16
to terminal lug TL18 (para 2-40) and go to
step 5 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.

TM 9-2320-365-20-1

2-584.24 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL16
and lockwasher from LH rear marker light
screw. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL16.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3094
from terminal lug TL16 to ground (para 2-40)
and go to step 5 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(6) If continuity is present, repair wire 489 from
splice E15 to splice E16 (para 2-40) and
go to step 5 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(7) Install lockwasher, terminal lug TL16,
lockwasher, and nut on LH rear marker
light screw.

Change 1 2-584.25

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through LH side marker
light lamp?

32.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
LH side marker light lamp
is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace LH side marker
light lamp (para 7-31) and
go to with step 5 of this
fault if required.

TM 9-2320-365-20-1

2-584.26 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from LH
side marker light base.
(2) Remove LH side marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH side marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace LH side
marker light lamp (para 7-31) and go to
step 5 of this fault if required.
(6) Install LH side marker lamp in socket.
(7) Install lens cover on LH side marker light
base with two screws.

Change 1 2-584.27

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

33.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89

Repair wire 489 from connector P54
to splice E15 (para 2-40) or replace
rear lights cable assembly (para 7-75).

Is 12 VDC present at
connector P85?

If 12 VDC is not present, wire
489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.28 Change 1

VOLTAGE TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Disconnect connector P85 from LH side
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P85.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P85 to splice E16
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) Position main light switch to OFF
(TM 9-2320-365-10).

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-584.29

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

34.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

If continuity is not present,
wire 3094 is faulty. If
continuity is present, LH side
marker light is faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present
from terminal lug TL15
to ground?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

Repair wire 3094 from terminal lug TL15
to terminal lug TL16 (para 2-40) and go to
step 5 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.

Replace LH side marker light
(para 7-31) and go to step 5 of
this fault if required.

TM 9-2320-365-20-1

2-584.30 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL15,
and lockwasher from LH side marker light
screw. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL15.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3094
from terminal lug TL15 to terminal lug TL16
(para 2-40) and go to step 5 of this fault if
required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.
(6) If continuity is present, replace LH side
marker light (para 7-31) and go to step 5
of this fault if required.
(7) Install lockwasher, terminal lug TL15,
lockwasher, and nut on LH side marker
light screw.
(8) Connect LH side marker light connector to
connector P85.

Change 1 2-584.31

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
from terminal lug TL20
to ground?

35.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

If continuity is not present,
wire 3095 is faulty. If
continuity is present, wire
489 is faulty.

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty rear lights cable
assembly.

Repair wire 3095 from terminal lug TL20
to terminal lug TL21 (para 2-40) and go to
step 6 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.

Repair wire 489 from splice E15
to splice E17 (para 2-40) and go to
step 6 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1 of
this fault.

TM 9-2320-365-20-1

2-584.32 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL20
and lockwasher from RH rear marker light
screw. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL20.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3095
from terminal lug TL20 to terminal lug TL21
(para 2-40) and go to step 6 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(6) If continuity is present, repair wire 489 from
splice E15 to splice E17 (para 2-40) and
go to step 6 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.
(7) Install lockwasher, terminal lug TL20,
lockwasher, and nut on RH rear marker
light screw.

Change 1 2-584.33

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through RH side marker
light lamp?

36.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

If continuity is not present, RH
side marker light lamp is faulty.

Replace RH side marker
light lamp (para 7-31) and
go to step 7 of this
fault if required.

TM 9-2320-365-20-1

2-584.34 Change 1

CONTINUITY TEST

(1) Remove two screws and lens cover from RH
side marker light base.
(2) Remove RH side marker light lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH side marker
light lamp and note reading on multimeter.
(5) If continuity is not present, replace RH side
marker light lamp (para 7-31) and go to
step 7 of this fault if required.
(6) Install RH side marker light lamp in socket.
(7) Install lens cover on RH side marker light
base with two screws.

Change 1 2-584.35

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

37.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89

Repair wire 489 from connector P88
to splice E17 (para 2-40) or replace
rear lights cable assembly (para 7-75).

Is 12 VDC present at
connector P88?

If 12 VDC is not present, wire
489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.36 Change 1

VOLTAGE TEST

CAUTION

WARNING

(1) Disconnect connector P88 from RH side
marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P88.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P88 to splice E17
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) Position main light switch to OFF
(TM 9-2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-584.37

TM 9-2320-365-20-1

REASON FOR QUESTION
Is continuity present
from terminal lug TL19
to ground?

NO

YES

KNOWN INFO
38.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

If continuity is not present,
wire 3095 is faulty. If
continuity is present, RH side
marker light is faulty.

Repair wire 3095 from terminal lug TL19
to terminal lug TL20 (para 2-40) and go to
step 6 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.

Replace RH side marker light
(para 7-31) and go to step 5 of this
fault if required.

TM 9-2320-365-20-1

2-584.38 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL19,
and lockwasher from RH side marker light
screw. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL19.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3095
from terminal lug TL19 to terminal lug TL20
(para 2-40) and go to step 6 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(6) If continuity is present, replace RH side
marker light (para 7-31) and go to step 5
of this fault if required.
(7) Install lockwasher, terminal lug TL19,
lockwasher, and nut on RH side marker
light screw.
(8) Connect RH side marker light connector to
connector P88.

Change 1 2-584.39

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
through LH marker
light lamp?

KNOWN INFO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

REASON FOR QUESTION

39.

40.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

YES

NO

NO

Continuity Test or
STE/ICE-R Test #91

Voltage Test or
STE/ICE-R Test #89

If continuity is not present,
LH marker light lamp is faulty.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 45 of this fault.

Is 12 VDC present
at connector P86?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace LH marker light lamp (para 7-31)
and go to step 30 of this fault if required.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.40 Change 1

CONTINUITY TEST

VOLTAGE TEST

(1) Disconnect LH marker light connector from
connector P86.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P86.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) Position main light switch to OFF (TM
9-2320-365-10).
(7) If 12 VDC is not present, go to step 45
of this fault.

WARNING

CAUTION

(1) Remove two screws and lens cover from LH
marker light base.
(2) Remove LH marker light lamp from socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH marker light
lamp and note reading on multimeter.
(5) If continuity is not present, replace LH
marker light lamp (para 7-31) and go to
step 30 of this fault if required.
(6) Install LH marker light lamp in socket.
(7) Install lens cover on LH marker light base
with two screws.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-584.41

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Is continuity present
from terminal lug TL16
to ground?

41.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

If continuity is not present,
wire 3094 is faulty. If
continuity is present, LH
marker light is faulty.

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker lights.
Faulty rear lights cable
assembly.

Repair wire 3094 from terminal lug TL16
to terminal lug TL18 (para 2-40) and go to
step 30 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault if required.

Replace LH marker light (para 7-31) and
go to step 30 of this fault if required.

TM 9-2320-365-20-1

2-584.42 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL16,
and lockwasher from LH marker light screw.
Discard lockwashers.
(2) Connect positive (+) probe of multimeter to
terminal lug TL16.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3094
from terminal lug TL16 to terminal lug TL18
(para 2-40) and go to step 30 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(5) If continuity is present, replace LH marker
light (para 7-38) and go to step 30 of this
fault if required.
(6) Install lockwasher, terminal lug TL16,
lockwasher, and nut on LH marker light
screw.
(7) Connect LH marker light connector to
connector P86.

Change 1 2-584.43

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

KNOWN INFO

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
TEST OPTIONS

REASON FOR QUESTION

Is continuity present
through RH marker
light lamp?

42.

43.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

YES

NO

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
RH marker light lamp is faulty.

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 46 of this fault.

Is 12 VDC present
at connector P89?

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty lamp.
Faulty marker light.
Faulty rear lights cable
assembly.

Replace RH marker light lamp (para 7-31)
and go to step 6 of this fault if required.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker light.
Faulty rear lights cable
assembly.

TM 9-2320-365-20-1

2-584.44 Change 1

CONTINUITY TEST

VOLTAGE TEST

CAUTION

WARNING

(1) Remove two screws and lens cover from
RH marker light base.
(2) Remove RH marker light lamp from socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH marker light
lamp and note reading on multimeter.
(5) If continuity is not present, replace RH
marker light lamp (para 7-31) and go to
step 6 of this fault if required.
(6) Install RH marker light lamp in socket.
(7) Install lens cover on RH marker light base
with two screws.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect RH marker lamp connector from
connector P89.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P89.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) Position main light switch to OFF
(TM 9-2320-365-10).
(7) If 12 VDC is not present, go to step 46
of this fault.

Change 1 2-584.45

TM 9-2320-365-20-1

KNOWN INFO

REASON FOR QUESTION

YES

Is continuity present
from terminal lug TL20
to ground?

TEST OPTIONS
44.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

If continuity is not present,
wire 3095 is faulty. If
continuity is present, RH
marker light is faulty.

Continuity Test or
STE/ICE-R Test #91

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.

POSSIBLE PROBLEMS
Faulty marker lights.
Faulty rear lights cable
assembly.

Repair wire 3095 from terminal lug TL20
to terminal lug TL21 (para 2-40) and go to
step 6 of this fault if required or replace
rear lights cable assembly (para 7-75)
and go to step 1 of this fault.

Replace RH marker light (para 7-31) and
go to step 6 of this fault if required.

TM 9-2320-365-20-1

2-584.46 Change 1

CONTINUITY TEST

(1) Remove nut, lockwasher, terminal lug TL20,
and lockwasher from RH marker light screw.
Discard lockwashers.
(2) Connect positive (+) probe of multimeter to
terminal lug TL20.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3095
from terminal lug TL20 to terminal lug TL21
(para 2-40) and go to step 6 of this fault if
required or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(5) If continuity is present, replace RH marker
light and go to step 6 of this fault if required.
(6) Install lockwasher, terminal lug TL20,
lockwasher, and nut on RH marker light
screw.
(7) Connect RH marker light connector to
connector P89.

Change 1 2-584.47

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

YES

45.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P85?

If 12 VDC is not present, wire
489 is faulty. If 12 VDC is
present, wire 489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.
Marker light OK.

POSSIBLE PROBLEMS
Faulty rear lights cable
assembly.

Repair wire 489 from splice E15
to splice E16 (para 2-40) and go to
step 30 of this fault if required or replace
rear lights cable assembly (para 7-75) and
go to step 1 of this fault.

Repair wire 489 from connector
P85 to splice E16 (para 2-40) and
go to step 30 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1 of this
fault.

TM 9-2320-365-20-1

2-584.48 Change 1

CAUTION

WARNING

VOLTAGE TEST

NOTE
Remove plastic cable ties as required.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P85 from LH rear
side marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P85.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P85 to splice E16
(para 2-40) and go to step 30 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1 of
this fault.

Change 1 2-584.49

TM 9-2320-365-20-1

(7) If 12 VDC is present, repair wire 489 from
connector P85 to splice E16 (para 2-40)
and go to step 30 of this fault if required
or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(8) Position main light switch to OFF
(TM 9-2320-365-10).

NOTE
Install plastic cable ties as required.

(9) Connect connector P85 to LH rear side
marker light connector.

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

REASON FOR QUESTION

YES

46.

e47. SIDE AND/OR REAR MARKER LIGHT(S) DO NOT ILLUMINATE (CONT)

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at
connector P88?

If 12 VDC is not present, wire
489 is faulty. If 12 VDC is
present, wire 489 is faulty.

Other marker lights illuminate.
Rear composite lights
illuminate.
Dashboard cable assembly OK.
Lamp OK.
Marker light OK.

POSSIBLE PROBLEMS
Faulty rear lights cable
assembly.

Repair wire 489 from splice E15
to splice E17 (para 2-40) and go to
step 6 of this fault if required or replace
rear lights cable assembly (para 7-75)
and go to step 1 of this fault.

Repair wire 489 from connector
P88 to splice E17 (para 2-40) and
go to step 6 of this fault if required or
replace rear lights cable assembly
(para 7-75) and go to step 1
of this fault.

TM 9-2320-365-20-1

2-584.50 Change 1

CAUTION

WARNING

VOLTAGE TEST

NOTE

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Remove plastic cable ties as required.

(1) Disconnect connector P88 from RH rear
side marker light connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P88.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 489
from connector P88 to splice E17
(para 2-40) and go to step 6 of this fault
if required or replace rear lights cable
assembly (para 7-75) and go to step 1
of this fault.

Change 1 2-584.51

TM 9-2320-365-20-1

(7) If 12 VDC is present, repair wire 489 from
connector P88 to splice E17 (para 2-40)
and go to step 6 of this fault if required
or replace rear lights cable assembly
(para 7-75) and go to step 1 of this fault.
(8) Position main light switch to OFF
(TM 9-2320-365-10).

NOTE
Install plastic cable ties as required.

(9) Connect connector P88 to RH rear side
marker light connector.

1.
KNOWN INFO
TEST OPTIONS

WARNING
Read WARNING
on following page.

REASON FOR QUESTION

YES

NO

Voltage Test or
STE/ICE-R Test #89
Is 12 VDC present at relay
circuit breaker CB67
socket 3?
If 12 VDC is present, wire
1912 is faulty.

Go to step 2 of this fault.

Circuit breaker CB67 OK.
No marker lights illuminate.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty relay K20.

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICR-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Repair wire 1912 from circuit breaker CB67
socket 3 to terminal board TB1 position 26
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-584.52 Change 1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB67 prior to beginning this task.

START

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove circuit breaker CB67 from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
circuit breaker CB67 socket 3 on PDP.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, go to step 2 of
this fault.
(8) If 12 VDC is present, repair wire 1912 from
circuit breaker CB67 socket 3 to terminal
board TB1 position 26 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-584.53

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1914 is faulty.

2.
Circuit breaker CB67 OK.
No marker lights illuminate.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty relay K20.

Is continuity present from
circuit breaker CB67
socket 3 to relay K20
terminal 87 on PDP?

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

Repair wire 1914 from circuit
breaker CB67 socket 3 to relay K20
terminal 87 on PDP (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
(para 7-11).

TM 9-2320-365-20-1

2-584.54 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove relay K20 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
circuit breaker CB67 socket 3 on PDP.
(5) Connect negative (-) probe of multimeter to
relay K20 terminal 87 on PDP and note
reading on multimeter.
(6) If 12 VDC is not present, repair wire 1914
from circuit breaker CB67 socket 3 to relay
K20 terminal 87 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(7) Install circuit breaker CB67 in PDP.
(8) Connect batteries (para 7-48).

Change 1 2-584.55

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

WARNING
Read WARNING
on following page.

REASON FOR QUESTION

YES

NO

Is 12 VDC present at relay
K20 terminal 30 on PDP?

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present, wire
1501 is faulty.

3.
Circuit breaker CB67 OK.
No marker lights illuminate.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty relay K20.

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

Repair wire 1501 from terminal X2 on PDP
to relay K20 terminal 30 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-584.56 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K20 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter to
ground and note reading on
multimeter.
(4) If 12 VDC is not present, repair wire 1501
from terminal X2 on PDP to relay K20
terminal 30 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Change 1 2-584.57

TM 9-2320-365-20-1

KNOWN INFO

WARNING
Read WARNING
on following page.
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

4.
Circuit breaker CB67 OK.
No marker lights illuminate.
POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty relay K20.

Go to step 6 of this fault.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 VDC present at relay
K20 terminal 86 on PDP?

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

TM 9-2320-365-20-1

2-584.58 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K20 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, go to step 6 of this
fault.
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-584.59

TM 9-2320-365-20-1

KNOWN INFO

REASON FOR QUESTION

YES

TEST OPTIONS

Is continuity present from
relay K20 terminal 85 on
PDP to ground?

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 3054 is faulty.

5.

Faulty dashboard cable
assembly.
Faulty relay K20.

POSSIBLE PROBLEMS

Circuit breaker CB67 OK.
No marker lights illuminate.
Main light switch OK.

Replace relay K20
(para 7-9).

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

Repair wire 3054 from relay K20
terminal 85 on PDP to terminal board
TB2 position 44 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-584.60 Change 1

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
relay K20 terminal 85 on PDP.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3054
from relay K20 terminal 85 on PDP to
terminal board TB2 position 44 on PDP
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) If continuity is present, replace relay K20
(para 7-9).
(7) Install relay K20 in PDP.
(8) Install PDP cover (para 16-2).

Change 1 2-584.61

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Is continuity present from
relay K20 terminal 86 to
connector PX12 pin 5?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1575 is faulty.

CAUTION
Read CAUTION
on following page.
6.

Faulty dashboard cable
assembly.
Faulty main light switch.

POSSIBLE PROBLEMS

Circuit breaker CB67 OK.
No marker lights illuminate.
Relay K20 OK.

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

Repair wire 1575 from relay K20
terminal 86 to connector PX12 pin 5
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-584.62 Change 1

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect batteries (para 7-48).
(2) Remove instrument panel assembly for
access (para 7-15).
(3) Disconnect connector PX12 from warning
light switch.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX12 pin 5.
(6) Connect negative (-) probe of multimeter to
relay K20 terminal 86 on PDP and note
reading on multimeter.
(7) If continuity is not present, repair wire 1575
from relay K20 terminal 86 to connector
PX12 pin 5 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(8) Install relay K20 in PDP.
(9) Install PDP cover (para 16-2).

Change 1 2-584.63

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

Replace main light switch
(para 7-17).

Is continuity present from
connector PX12 pin 5
to connector PX15
socket H?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1575 is faulty. If
continuity is present, main
light switch is faulty.

WARNING
Read WARNING
on following page.
7.

Faulty dashboard cable
assembly.
Faulty main light switch.

POSSIBLE PROBLEMS

Circuit breaker CB67 OK.
No marker lights illuminate.
Relay K20 OK.

e47A. ALL MARKER LIGHTS DO NOT ILLUMINATE IN NORMAL MODE (CONT)

Repair wire 1575 from connector PX12
pin 5 to connector PX15 socket H
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-584.64 Change 1

CONTINUITY TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Disconnect connector PX15 from main light
switch.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX12 pin 5.
(4) Connect negative (-) probe of multimeter to
connector PX15 socket H and note reading
on multimeter.
(5) If continuity is not present, repair wire 1575
from connector PX12 pin 5 to connector
PX15 socket H (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) If continuity is present, replace main light
switch (para 7-17).
(7) Connect connector PX15 to main light
switch.
(8) Connect connector PX12 to warning light
switch.
(9) Install instrument panel assembly (para
7-15).
(10) Connect batteries (para 7-48).

Change 1 2-585

TM 9-2320-365-20-1

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE

TEST OPTIONS

NO

YES
Go to step 6 of this fault.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Operational Test

2-586 Change 1

This question eliminates
possible problems and
determines where
troubleshooting continues.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Packing, Preformed (Item 172, Appendix G)
Lockwasher (2) (Item 92, Appendix G)

REASON FOR QUESTION

KNOWN INFO
1.

START

Other service lights illuminate.
Circuit breaker CB80 OK.

POSSIBLE PROBLEMS

Does LH or RH composite
taillight illuminate?

TM 9-2320-365-20-1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB80 prior to beginning this task.

Faulty lamp.
Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty dashboard cable
assembly.
Faulty relay K20.
Faulty main light switch.

Change 1 2-587

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) If neither composite taillight illuminates,
go to step 6 of this fault.
(3) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS
2.

NO

3.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Is continuity present
through RH composite
taillight lamp?

Does LH composite
taillight illuminate?

POSSIBLE PROBLEMS

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

YES

Continuity Test or
STE/ICE-R Test #91

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty lamp.

Visual Inspection

REASON FOR QUESTION

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty lamp.

Go to step 7 of this fault.

Replace RH composite taillight
lamp (para 7-32).

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminate.
Dashboard cable
assembly OK.

If continuity is not present,
RH composite taillight lamp
is faulty.

TM 9-2320-365-20-1

2-588 Change 1

This question illuminates
possible problems and
determines where
troubleshooting continues.

CONTINUITY TEST

(1) Loosen six screws and remove cover and
preformed packing from RH composite
taillight. Discard preformed packing.
(2) Remove RH composite taillight lamp
from socket.
(3) Set multimeter to ohms.
(4) Check continuity through RH composite
taillight lamp and note reading on multimeter.
(5) If continuity is not present, replace RH
composite taillight lamp (para 7-32).

If LH taillight does not illuminate, go to step 7
of this fault.

Change 1 2-589

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

4.

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC present at
connector P64?

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.
Lamp OK.

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present, wire
21 is faulty.

Repair wire 21 from connector P64 to
splice E20 (para 2-40) or replace rear
lights cable assembly (para 7-75).

2-590 Change 1

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Disconnect connector P64 from RH
composite taillight assembly.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P64.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note
reading on multimeter.
(6) If 12 VDC is not present, repair wire 21
from connector P64 to splice E20
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) Position main light switch to OFF
(TM 9-2320-365-10).

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits,
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-591

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

5.

Is continuity present
from terminal lug TL21
to ground?

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

Replace RH composite taillight
assembly (para 7-32).

NO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 3095 from terminal lug
TL21 to terminal lug TL92 is
faulty. If continuity is present,
RH composite taillight assembly
is faulty.

Faulty composite taillight
assembly.

POSSIBLE PROBLEMS

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.
Lamp OK.
Rear lights cable
assembly OK.

Repair wire 3095 from terminal lug TL21
to terminal lug TL92 (para 2-40) or replace
rear lights cable assembly (para 7-75).

2-592 Change 1

TM 9-2320-365-20-1

CONTINUITY TEST

(1) Remove two screws, lockwashers, RH
composite taillight assembly, and
terminal lug TL21 from right taillight
carrier. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL21.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3095
from terminal lug TL21 to terminal lug TL92
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(6) If continuity is present, replace RH
composite taillight assembly (para 7-32).
(7) Install terminal lug TL21, and RH composite
taillight assembly on right taillight carrier with
two lockwashers and screws.

Change 1 2-593

TM 9-2320-365-20-1

(8) Connect connector P64 to RH composite
taillight assembly.
(9) Install RH composite taillight lamp in socket.
(10) Install preformed packing and cover on RH
composite taillight assembly with six screws.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

6.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

NO

YES

Voltage Test or
STE/ICE-R Test #89

Go to step 10 of this fault.

2-594 Change 1

Is 12 VDC present at
connector J51 pin 3?

Other service light illuminates.
Circuit breaker CB80 OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty relay K20.
Faulty main light switch.

If 12 VDC is not present, go
to step 10 of this fault. If
12 VDC is present, wire 21
from connector P51 socket 3
to splice E20 is faulty.

Repair wire 21 from connector P51
socket 3 to splice E20 (para 2-40)
or replace rear lights cable
assembly (para 7-75).

TM 9-2320-365-20-1

VOLTAGE TEST

Change 1 2-594.1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector P51 from
connector J51.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector J51 pin 3.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(10) If 12 VDC is not present, go to step 10 of
this fault.
(11) If 12 VDC is present, repair wire 21 from
connector P51 socket 3 to splice E20
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(12) Position main light switch to OFF
TM 9-2320-365-10).
(13) Connect connector J51 to connector P51.
(14) Install PDP on dashboard with three screws.
(15) Install three washers and screws in PDP.

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
through LH composite
taillight lamp?

NO

YES

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

7.

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R Test #91

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty lamp.

If continuity is not present,
LH composite taillight lamp
is faulty.

Replace LH composite
taillight lamp (para 7-32).

TM 9-2320-365-20-1

2-594.2 Change 1

CONTINUITY TEST

Change 1 2-594.3

TM 9-2320-365-20-1

(1) Loosen six screws and remove cover and
preformed packing from LH composite taillight
lamp. Discard preformed packing.
(2) Remove LH composite taillight lamp from
socket.
(3) Set multimeter to ohms.
(4) Check continuity through LH composite
taillight lamp and note reading on
multimeter.
(5) If continuity is not present, replace LH
composite taillight lamp (para 7-32).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC present at
connector P78?

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

8.

POSSIBLE PROBLEMS

NO

YES

Voltage Test or
STE/ICE-R Test #89

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.
Lamp OK.

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.

If 12 VDC is not present, wire
21 from connector P78 to
splice E20 is faulty.

Repair wire 21 from connector P78 to
splice E20 (para 2-40) or replace rear
lights cable assembly (para 7-75).

TM 9-2320-365-20-1

2-594.4 Change 1

VOLTAGE TEST

CAUTION

WARNING

NOTE

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits,
or cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P78 from LH
composite taillight assembly.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P78.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 12 VDC is not present, repair wire 21 from
connector P78 to splice E20 (para 2-40) or
replace rear lights cable assembly (para 7-75).
(7) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-594.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
from terminal lug TL18
to ground?

9.

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Replace LH composite taillight
assembly (para 7-32).

NO

YES

Continuity Test or
STE/ICE-R Test #91

Other service light illuminates.
Circuit breaker CB80 OK.
One composite taillight
illuminates.
Dashboard cable
assembly OK.
Lamp OK.

Faulty composite taillight
assembly.
Faulty rear lights
cable assembly.

If continuity is not present,
wire 3094 from terminal lug
TL18 to splice E21 is faulty.
If continuity is present, LH
composite taillight assembly
is faulty.

Repair wire 3094 from terminal lug TL18
to splice E21 (para 2-40) or replace rear
lights cable assembly (para 7-75).

TM 9-2320-365-20-1

2-594.6 Change 1

CONTINUITY TEST

(1) Remove two screws, lockwashers, LH
composite taillight assembly, and
terminal lug TL18 from right taillight
carrier. Discard lockwashers.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL18.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire
3094 from terminal lug TL18 to splice
E21 (para 2-40).
(6) If continuity is present, replace LH
composite taillight assembly (para 7-32).
(7) Install terminal lug TL18, and LH composite
taillight assembly on left taillight carrier with
two lockwashers and screws.
(8) Connect connector P78 to LH composite
taillight assembly.
(9) Install LH composite taillight lamp in socket.
(10) Install preformed packing and cover on LH
composite taillight assembly with six screws.

Change 1 2-594.7

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

10.

Other service light illuminates.
Circuit breaker CB80 OK.
Rear lights cable
assembly OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty relay K20.

Is 12 VDC present at
circuit breaker CB80
socket 1?

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is present, wire 21
is faulty.

Go to step 11 of this fault.

Repair wire 21 from circuit breaker
CB80 socket 2 on PDP to connector
J51 pin 3 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

2-594.8 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove circuit breaker CB80 from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
circuit breaker CB80 socket 1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(7) If 12 VDC is not present, go to
11 of this fault.
(8) If 12 VDC is present, repair wire
21 from circuit breaker CB80
socket 2 on PDP to connector J51
pin 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-594.9

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

CAUTION
Read CAUTION
on following page.
KNOWN INFO

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1914 from relay K20
terminal 87 on PDP to circuit
breaker CB80 socket 1 on
PDP is faulty.

11.

Other service light illuminates.
Circuit breaker CB80 OK.
Rear lights cable
assembly OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty relay K20.

Is continuity present from
circuit breaker to CB80
socket 1 to relay K20
terminal 87 on PDP?

Repair wire 1914 from circuit breaker
CB80 socket 1 on PDP to relay K20
terminal 87 on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
(para 7-11).

TM 9-2320-365-20-1

2-594.10 Change 1

CAUTION

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove relay K20 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
circuit breaker CB80 socket 1 on PDP.
(5) Connect negative (-) probe of multimeter to
relay K20 terminal 87 on PDP and note
reading on multimeter.
(6) If 12 VDC is not present, repair wire 1914
from circuit breaker CB80 socket 1 on PDP
to relay K20 terminal 87 on PDP (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Install circuit breaker CB80 in PDP.
(8) Connect batteries (para 7-48).

Change 1 2-594.11

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

Is 12 VDC present at
relay K20 terminal 30
on PDP?

WARNING
Read WARNING
on following page.

YES

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

POSSIBLE PROBLEMS

Other service light illuminates.
Circuit breaker CB80 OK.
Rear lights cable
assembly OK.

Faulty dashboard cable
assembly.
Faulty relay K20.
Faulty main light switch.

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present, wire
1501 from terminal X2 to relay
K20 terminal 30 on PDP is
faulty.

Repair wire 1501 from terminal X2 on PDP
to relay K20 terminal 30 on PDP (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

12.

TM 9-2320-365-20-1

2-594.12 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K20 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1501
from terminal X2 on PDP to relay K20
terminal 30 on PDP (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-594.13

TM 9-2320-365-20-1

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

KNOWN INFO

Is 12 VDC present at
relay K20 terminal 86
on PDP?

TEST OPTIONS

REASON FOR QUESTION

NO

WARNING
Read WARNING
on following page.

YES

POSSIBLE PROBLEMS

Voltage Test or
STE/ICE-R Test #89

Other service light illuminates.
Circuit breaker CB80 OK.
Rear lights cable
assembly OK.

Faulty dashboard cable
assembly.
Faulty relay K20.
Faulty main light switch.

This question eliminates
possible problems and
determines where
troubleshooting continues.

13.

Go to step 15 of this fault.

TM 9-2320-365-20-1

2-594.14 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
relay K20 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter to
ground and note reading on
multimeter.
(4) If 12 VDC is not present, go to step 15 of
this fault.

Change 1 2-594.15

TM 9-2320-365-20-1

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

TEST OPTIONS

REASON FOR QUESTION
Is continuity present from
relay K20 terminal 85 on
PDP to ground?

KNOWN INFO

NO

YES

POSSIBLE PROBLEMS

Repair wire 3054 from relay K20
terminal 85 on PDP to terminal board
TB2 position 44 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Continuity Test or
STE/ICE-R Test #91

Other service light illuminates.
Circuit breaker CB80 OK.
Rear lights cable
assembly OK.

Faulty dashboard cable
assembly.
Faulty relay K20.

14.

Replace relay
K20 (para 7-9).

If continuity is not present,
wire 3054 is faulty. If
continuity is present, relay
K20 is faulty.

TM 9-2320-365-20-1

2-594.16 Change 1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
relay K20 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3054
from relay K20 terminal 85 on PDP to terminal
board TB2 position 44 on PDP (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K20
(para 7-9).
(6) Install relay K20 in PDP.
(7) Install PDP cover (para 16-2).

Change 1 2-594.17

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

CAUTION
Read CAUTION
on following page.

YES

NO

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

Is continuity present from
connector PX15 socket H
to relay K20 terminal 86
on PDP?

POSSIBLE PROBLEMS

Replace main light
switch (para 7-17).

Other service light illuminates.
Circuit breaker CB80 OK.
Lamp OK.
Relay K20 OK.
Rear lights cable
assembly OK.

Faulty dashboard cable
assembly.
Faulty main light switch.

Continuity Test or
STE/ICE-R Test #91

15.

Go to step 16 of this fault.

TM 9-2320-365-20-1

2-594.18 Change 1

If continuity is present,
main light switch is faulty.

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

(1) Remove circuit breaker CB70 from PDP.
(2) Remove instrument panel assembly for
access (para 7-15).
(3) Disconnect connector PX15 from main
light switch.
(4) Install circuit breaker CB70 in PDP.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector PX15 socket H.
(7) Connect negative (-) probe of multimeter to
relay K20 terminal 86 on PDP and note
reading on multimeter.
(8) If continuity is not present, go to step 16 of
this fault.
(9) If continuity is present, replace main light
switch (para 7-17).

Change 1 2-594.19

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

CAUTION
Read CAUTION
on following page.
KNOWN INFO

Is continuity present from
connector PX15 socket H
to connector PX12 pin 5?

e48. ONE OR BOTH COMPOSITE TAILLIGHTS DO NOT ILLUMINATE (CONT)

NO

YES

POSSIBLE PROBLEMS

Repair wire 1575 from connector PX12
pin 5 to relay K20 terminal 86 on PDP
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Continuity Test or
STE/ICE-R Test #91

Other service light illuminates.
Circuit breaker CB80 OK.
Lamp OK.
Relay K20 OK.
Rear lights cable
assembly OK.
Main light switch OK.

Faulty dashboard cable
assembly.

If continuity is not present,
wire 1575 from connector
PX15 socket H to connector
PX12 pin 5 is faulty. If
continuity is present, wire
1575 from connector PX12
pin 5 to relay K20 terminal
86 on PDP is faulty.

Repair wire 1575 from connector PX15
socket H to connector PX12 pin 5 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

16.

TM 9-2320-365-20-1

2-594.20 Change 1

CONTINUITY TEST

CAUTION

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove circuit breaker CB70 from PDP.
(2) Disconnect connector PX12 from warning
light switch.
(3) Install circuit breaker CB70 in PDP.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to connector PX15 socket H.
(6) Connect negative (-) probe of multimeter
to connector PX12 pin 5 and note reading
on multimeter.
(7) If continuity is not present, repair wire 1575
from connector PX15 socket H (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If continuity is present, repair wire 1575 from
connector PX12 pin 5 to relay K20 terminal
86 on PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(9) Remove circuit breaker CB70 from PDP.

Change 1 2-595

TM 9-2320-365-20-1

switch.
(11) Connect connector PX15 to main light
switch.
(12) Install circuit breaker CB70 in PDP.
(13) Install relay K20 in PDP.
(14) Install PDP cover (16-2).
(15) Install instrument panel assembly
(para 7-15).

(10) Connect connector PX12 to warning light

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-596
2-596
2-596
2-596
2-596

YES

START

1.
Operational Test
Rear blackout
marker lights illuminate.

Does one front blackout
marker light illuminate?

NO

Go to step 5 of this fault.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION
This question eliminates
possible problems and
determines where to
continue troubleshooting.

Faulty front lights cable
assembly.
Faulty front blackout
marker light LED.
Faulty composite front
light assembly.

e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Packing, Preformed (Item 172, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-597
2-597
2-597
2-597
2-597

OPERATIONAL TEST

(1) Position main light switch to BO MARKER
(TM 9-2320-365-10).
(2) Observe front blackout marker lights and
determine how many lights do not illuminate.
(3) If both marker lights do not illuminate,
go to step 5 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-598
2-598
2-598
2-598
2-598

YES

Rear blackout marker
lights illuminate.
One front blackout marker
light illuminates.

2.

WARNING
Read WARNING
on following page.

NO

If 12 vdc is not present,
wire 20 (left front blackout
marker light) or wire 20A
(right front blackout
marker) is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION
Is 12 vdc present at LED
socket center contact?

Voltage Test or
STE/ICE-R #89

Faulty front lights cable
assembly.
Faulty composite front
light assembly.
Faulty front blackout
marker light LED.

Repair wire 20 or 20A
(para 2-40) or replace
front lights cable
assembly (para 7-74).

e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-599
2-599
2-599
2-599
2-599

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Loosen five screws on cover.
(2) Remove cover and preformed packing from
housing. Discard preformed packing.
(3) Open blackout marker lamp.
(4) Remove blackout marker lamp from socket.
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
LED socket center contact.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position main light switch BO MARKER
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 12 vdc is not present, repair wire 20
(left front blackout marker) or wire 20A
(right front blackout marker) (para 2-40)
or replace front lights cable assembly
(para 7-74).
(10) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-600
2-600
2-600
2-600
2-600

YES

3.

4.

YES

NO

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Rear blackout marker
lights illuminate.
One blackout marker
light illuminates.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Is continuity present
between LED socket and
a known good ground?

Continuity Test or
STE/ICE-R #91

If continuity is not present,
wire 3091 is faulty.

Is continuity present
between LED socket and
inside of composite
light housing?

Continuity Test or
STE/ICE-R #91

Faulty front blackout
marker light LED.
Faulty composite front
light assembly.
Faulty front lights cable
assembly.

Rear blackout marker
lights illuminate.
One blackout marker
light illuminates.
Dashboard cable
assembly OK.
Front blackout marker
light LED OK.
Front lights cable
assembly OK.

POSSIBLE PROBLEMS

Faulty composite front
light assembly.

If continuity is not present,
composite front light LED
is faulty. If continuity is
present, composite front
light assembly is faulty.

Repair wire 3091 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace composite front
light assembly (para 7-33).

Replace composite front
light assembly blackout
marker LED (para 7-33).

e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-601
2-601
2-601
2-601
2-601

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
LED socket.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3091
(para 2-40) or replace front lights cable
assembly (para 7-74).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
inside of housing.
(3) Connect negative (-) probe of multimeter to
socket and note reading on multimeter.
(4) If continuity is present, replace composite
front light assembly blackout marker LED
(para 7-33).
(5) If continuity is not present, replace composite
front light assembly (para 7-33).
(6) Open blackout marker lamp.
(7) Install blackout marker lamp in socket.
(8) Install preformed packing and cover on housing
with five screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-602
2-602
2-602
2-602
2-602

5.

YES

WARNING
Read WARNING
on following page.

NO

Is 12 vdc present on
connector J27-3?

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

If 12 vdc is not present,
wire 20 in dashboard cable
assembly is faulty.

Rear blackout marker
lights illuminate.
Composite front light
assembly OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

Repair wire 20 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-603
2-603
2-603
2-603
2-603

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector
P27.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter to
J27-3.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 12 vdc is not present, repair wire 20
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Connect connector J27 to connector P27.
(13) Install PDP on dashboard with three screws.
(14) Install three washers and screws in PDP.
(15) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-604
2-604
2-604
2-604
2-604

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

6.

Fault corrected.

Is 12 vdc present at
connector P24 (LH
front turn signal and park
light assembly) or P8
(RH front turn signal and
park light assembly)?

If 12 vdc is not present,
wire 20 or 20A is faulty.

Rear blackout marker
lights illuminate.
Front blackout marker
light LED OK.
Composite front light
assembly OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.

Repair wire 20 or 20A (para 2-40)
or replace front lights cable
assembly (para 7-74).

e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
e49. ONE OR BOTH FRONT BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-605
2-605
2-605
2-605
2-605

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector P24 (LH composite front
light assembly) or connector P8 (RH composite
front assembly) from composite front assembly
connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P24 or connector P8.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to BO MARKER
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 20 or 20A
(para 2-40) or replace front lights cable
assembly (para 7-74).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Connect connector P24 or connector P8
to composite front light assembly connector.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-606
2-606
2-606
2-606
2-606

YES

1.
Circuit breaker OK.

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION
Faulty front lights cable
assembly.
Faulty blackout drive light.
Faulty lamp.
Faulty main light switch.
Faulty dashboard cable
assembly.

Is 12 vdc present at lamp
socket center contact?

WARNING
Read WARNING
on following page.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 4 of this fault.

Voltage Test or
STE/ICE-R #89

START

e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Packing, Preformed (Item 168, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-607
2-607
2-607
2-607
2-607

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Loosen three screws on cover.
(2) Remove cover and gasket from housing.
Discard gasket.
(3) Remove lamp from socket.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter to
lamp socket center contact.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 12 vdc is not present, go to step 4 of
this fault.
(9) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-608
2-608
2-608
2-608
2-608

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Circuit breaker OK.
Main light switch OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.
Faulty blackout drive light.
Faulty lamp.

Is continuity present
between lamp socket
and a known good
ground?

2.

If continuity is not present,
wire 3091 is faulty.

Continuity Test or
STE/ICE-R #91

Circuit breaker OK.
Main light switch OK.
Dashboard cable
assembly OK.
Front lights cable
assembly OK.

POSSIBLE PROBLEMS

Faulty blackout drive light.
Faulty lamp.

3.

Is continuity present
between lamp socket and
inside of blackout drive
light housing?

If continuity is not present,
blackout drive light is
faulty. If continuity is
present, lamp is faulty.

NO

Repair wire 3091 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace blackout drive
light (para 7-30).

Replace lamp
(para 7-30).

e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-609
2-609
2-609
2-609
2-609

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
lamp socket.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3091
(para 2-40) or replace front lights cable
assembly (para 7-74).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
inside of blackout drive light housing.
(3) Connect negative (-) probe of multimeter to
lamp socket and note reading on multimeter.
(4) If continuity is not present, replace blackout
drive light (para 7-30).
(5) If continuity is present, replace lamp
(para 7-30).
(6) Install lamp in socket.
(7) Install gasket and cover on housing with
three screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-610
2-610
2-610
2-610
2-610

YES

4.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
Is continuity present
between main light
switch terminals D and F?

Circuit breaker OK.
Lamp OK.
Blackout drive light OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

If continuity is not present,
main light switch is
faulty.

Continuity Test or
STE/ICE-R #91

Replace main light
switch (para 7-17).

e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-611
2-611
2-611
2-611
2-611

CONTINUITY TEST

(1) Remove main light switch (para 7-17).
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to main
light switch terminal F.
(4) Connect negative (-) probe of multimeter to main
light switch terminal D.
(5) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If continuity is not present, replace main
light switch (para 7-17).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Install main light switch (para 7-17).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-612
2-612
2-612
2-612
2-612

5.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

Circuit breaker OK.
Lamp OK.
Main light switch OK.
Blackout drive light OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

Is 12 vdc present on
connector J27-7?

If 12 vdc is not present,
wire 19 is faulty.

Repair wire 19 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-613
2-613
2-613
2-613
2-613

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector
P27.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
J27-7.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 12 vdc is not present, repair wire 19
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Connect connector J27 to connector P27.
(13) Install PDP on dashboard with three screws.
(14) Install three washers and screws in PDP.
(15) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-614
2-614
2-614
2-614
2-614

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

6.
Circuit breaker OK.
Lamp OK.
Main light switch OK.
Blackout drive light OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.

Is 12 vdc present at
connector P17?

If 12 vdc is not present,
wire 19 is faulty. If 12 vdc
is present, wire 3091 is
faulty.

Repair wire 19 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Repair wire 3091 (para 2-40)
or replace front lights cable
assembly (para 7-74).

e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)
e50. BLACKOUT DRIVE LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-615
2-615
2-615
2-615
2-615

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector P17 from blackout drive
light connector.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P17.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 19
(para 2-40) or replace front lights cable
assembly (para 7-74).
(7) If 12 vdc is present, repair wire 3091
(para 2-40) or replace front lights cable
assembly (para 7-74).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect connector P17 to blackout drive
light connector.

1.
KNOWN INFO
TEST OPTIONS

NO

YES

START

Operational Test

REASON FOR QUESTION

This question eliminates
possible faults and
determines where
troubleshooting continues.

Go to step 5 of this fault.

Does one rear blackout
marker light illuminate?

Front blackout marker lights
illuminate.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear blackout marker
light LED.
Faulty composite taillight
assembly.
Faulty dashboard cable
assembly.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Packing, Preformed (Item 172, Appendix G)
Nut, Self-Locking (Item 137, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P

e51. ONE OR BOTH REAR BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE

2-616 Change 1

TM 9-2320-365-20-1

(1) Position main light switch to BO MARKER
(TM 9-2320-365-10).
(2) Observe operation of rear blackout marker
lights.
(3) If neither rear blackout marker light
illuminates, go to step 5 of this fault.
(4) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-617

TEST OPTIONS

NO

REASON FOR QUESTION

2.
KNOWN INFO

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

Front blackout marker lights
illuminate.
One rear blackout marker
light illuminates.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty rear blackout marker
light LED.

YES

Is 12 VDC present at LED
socket center contact?
If 12 VDC is not present, wire
24 is faulty.

e51. ONE OR BOTH REAR BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 24 from LED socket
center contact to splice E19 (para 2-40)
or replace rear lights cable assembly
(para 7-75).

TM 9-2320-365-20-1

2-618 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Loosen six screws and remove cover and
preformed packing from housing. Discard
preformed packing.
(2) Open blackout marker lamp.
(3) Remove blackout marker lamp from socket.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
LED socket center contact.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position main light switch to BO MARKER
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 12 VDC is not present, repair wire 24 from
LED socket center contact to splice E19
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-619

TM 9-2320-365-20-1

TEST OPTIONS

TEST OPTIONS

REASON FOR QUESTION

REASON FOR QUESTION

KNOWN INFO

KNOWN INFO

3.

4.

YES

NO

YES

NO

Continuity Test or
STE/ICE-R Test #91

Front blackout marker lights
illuminate.
One rear blackout marker light
illuminates.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear blackout marker
light LED.
Faulty composite taillight
assembly.

Front blackout marker lights
illuminate.
One rear blackout marker light
illuminates.
Dashboard cable assembly OK.
Rear lights cable assembly OK.

POSSIBLE PROBLEMS

Faulty rear blackout marker
light LED.
Faulty composite taillight
assembly.

Is continuity present from
LED socket to ground?
If continuity is not present,
wire 3094 (LH rear blackout
marker light) or wire 3095 (RH
rear blackout marker light is
faulty.

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
LED socket and inside of rear
taillight housing?
If continuity is not present,
composite taillight assembly
is faulty. If continuity is
present, rear blackout marker
light LED is faulty.

e51. ONE OR BOTH REAR BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 3094 from terminal lug TL18
to terminal lug TL93 or wire 3095 from terminal
lug TL21 to terminal lug TL92 (para 2-40)
or replace rear lights cable assembly
(para 7-75).

Replace composite taillight
assembly (para 7-32).

Replace rear blackout
marker light LED (para 7-32).

TM 9-2320-365-20-1

2-620 Change 1

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to LED socket.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3094
from terminal lug TL18 to terminal lug TL93
(LH rear blackout marker light) or wire 3095
from terminal lug TL21 to terminal lug TL92
(RH rear blackout marker light) (para 2-40)
or replace rear lights cable assembly
(para 7-75).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to inside of housing.
(3) Connect negative (-) probe of multimeter
to LED socket and note reading on
multimeter.
(4) If continuity is not present, replace
composite taillight assembly (para 7-32).
(5) If continuity is present, replace rear
blackout marker light LED (para 7-32).
(6) Open blackout marker lamp.
(7) Install blackout marker lamp in socket.
(8) Install preformed packing and cover on
housing with six screws.

TM 9-2320-365-20-1

Change 1 2-621/(2-622 Blank)
All data on pages 2-622 and 2-623 deleted.

TEST OPTIONS

NO

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

YES

5.

Is 12 VDC present at
connector J51 pin 17?
If 12 VDC is not present, wire
24 is faulty.

Front blackout marker lights
illuminate.
Rear blackout marker light LED
OK.
Composite taillight assembly
OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

e51. ONE OR BOTH REAR BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 24 from connector J51
pin 17 to terminal board TB1 position 54
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 24 from connector P76 (LH rear
blackout marker light) or P62 (RH rear blackout
marker light) to connector P51 socket 17 (para 2-40)
or replace rear lights cable assembly
(para 7-75).

TM 9-2320-365-20-1

(2-623 Blank)/2-624 Change 1

VOLTAGE TEST

WARNING

CAUTION

NOTE

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-625

TM 9-2320-365-20-1

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J51 from connector
P51.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter to
connector J51 pin 17.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch to BO MARKER
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 12 VDC is not present, repair wire 24 from
connector J51 pin 17 to terminal baord TB1
position 54 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(11) If 12 VDC is present, repair wire 24
from connector P76 (LH rear blackout
marker light) or P62 (RH rear blackout
marker light) to connector P51 socket 17
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(12) Position main light switch to OFF
(TM 9-2320-365-10).
(13) Connect connector J51 to connector P51.
(14) Install PDP on dashboard with three screws.
(15) Install three washers and screws in PDP.
(16) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-626
2-626
2-626
2-626
2-626

1.

START

YES

NO

Circuit breaker OK.
Marker lights illuminate.
Is 12 vdc present on
connector J62-B?
This step eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

Faulty warning light cable
assembly.
Faulty warning light.
Faulty dashboard cable
assembly.
Faulty warning light
switch.
Faulty relay K13.
Go to step 3 of this fault.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

e52. WARNING LIGHT DOES NOT ILLUMINATE

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-627
2-627
2-627
2-627
2-627

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Disconnect warning light connector from
connector J62.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J62-B.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position warning light switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, go to step 3 of this
fault.
(8) Position warning light switch to off
(TM 9-2320-365-10).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-628
2-628
2-628
2-628
2-628

YES

NO

2.

Is continuity present
between connector J62-A
and a known good ground?
If continuity is not present,
wire 3050 is faulty. If
continuity is present,
warning light is faulty.

KNOWN INFO

REASON FOR QUESTION

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

Circuit breaker OK.
Marker lights illuminate.
Dashboard cable
assembly OK.
Relay K13 OK.

POSSIBLE PROBLEMS

Faulty warning light cable
assembly.
Faulty warning light.

3.

If 12 vdc is not present,
wire 1575 is faulty.

YES

NO

Is 12 vdc present at
connector PX12-5?

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

WARNING
Read WARNING
on following page.
Circuit breaker OK.
Marker lights illuminate.
Warning light OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty warning light
switch.
Faulty relay K13.
Faulty warning light
cable assembly.

Repair wire 3050 (para 2-40)
or replace warning light cable
assembly (para 22-2).

Replace warning light
(TM 9-2320-365-10).

Repair wire 1575 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-629
2-629
2-629
2-629
2-629

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J62-A.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3050
(para 2-40) or replace warning light cable
assembly (para 22-2).
(5) If continuity is present, replace warning light
(TM 9-2320-365-10).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Set multimeter to volts dc.
(3) Disconnect connector PX12 from warning
light switch.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Connect positive (+) probe of multimeter to
connector PX12-5.
(6) Connect negative (-) probe of multimeter to
ground.
(7) If 12 vdc is not present, repair wire 1575
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-630
2-630
2-630
2-630
2-630

YES

NO

4.

Is continuity present
between warning light
switch terminals 1 and 5?
If continuity is not present,
warning light switch is
faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Circuit breaker OK.
Marker lights illuminate.
Warning light OK.
POSSIBLE PROBLEMS
Faulty warning light
switch.
Faulty dashboard cable
assembly.
Faulty relay K13.
Faulty warning light cable
assembly.

Replace warning light
switch (para 7-18).

e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-631
2-631
2-631
2-631
2-631

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
warning light switch terminal 1.
(3) Connect negative (-) probe of multimeter to
warning light switch terminal 5.
(4) Position warning light switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If continuity is not present, replace warning
light switch (para 7-18).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-632
2-632
2-632
2-632
2-632

YES

NO

5.

If continuity is not present,
wire 1559 is faulty.

YES

NO

6.

Is continuity present
between relay K13
terminal 85 and a known
good ground?

If continuity is not present,
wire 3054 is faulty.

Is continuity present
between connector PX12-1
and relay K13 terminal 86?

Circuit breaker OK.
Marker lights illuminate.
Warning light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K13.
Faulty warning light
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION

Circuit breaker OK.
Marker lights illuminate.
Warning light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K13.
Faulty warning light
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1559 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3054 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-633
2-633
2-633
2-633
2-633

CONTINUITY TEST

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove relay K13 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
PDP, socket 86, where relay K13 was removed.
(5) Connect negative (-) probe of multimeter to
connector PX12-1 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1559
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) Connect connector PX12 to warning light
switch.
(8) Install instrument panel assembly (para 7-15).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP, socket 85, where relay K13 was
removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3054
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-634
2-634
2-634
2-634
2-634

NO

YES

REASON FOR QUESTION

NO

YES

7.

8.

Is 12 vdc present on
relay K13 terminal 30?
If 12 vdc is not present,
wire 509 is faulty.

Circuit breaker OK.
Marker lights illuminate.
Warning light switch OK.

Faulty dashboard cable
assembly.
Faulty relay K13.
Faulty warning light
cable assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Circuit breaker OK.
Marker lights illuminate.
Warning light switch OK.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

Is 12 vdc present at
relay K13 terminal
87?

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

Faulty relay K13.
Faulty dashboard cable
assembly.
Faulty warning light
cable assembly.

If 12 vdc is not present,
relay K13 is faulty.

Repair wire 509 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace relay
K13 (para 7-9).

e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-635
2-635
2-635
2-635
2-635

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

VOLTAGE TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
PDP, socket 30, where relay K13 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Position warning light switch to on
(TM 9-2320-365-10).
(6) If 12 vdc is not present, repair wire 509
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Position warning light switch to off
(TM 9-2320-365-10).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Install relay K13 in PDP.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
relay K13 terminal 87.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position warning light switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, replace relay K13
(para 7-9).
(8) Position warning light switch to off
(TM 9-2320-365-10).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-636
2-636
2-636
2-636
2-636

NO

YES

KNOWN INFO
TEST OPTIONS

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

9.
Circuit breaker OK.
Marker lights illuminate.
Warning light switch OK.
Relay K13 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty warning light
cable assembly.

Is 12 vdc present on
connector J65-1?
If 12 vdc is not present,
wire 509 in dashboard
cable assembly is faulty.
If 12 vdc is present, wire
509 in warning light cable
assembly is faulty.

Repair wire 509 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 509 (para 2-40)
or replace warning light cable
assembly (para 22-2).

e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)
e52. WARNING LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-637
2-637
2-637
2-637
2-637

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Remove seven screws and washers from kick
panel.
(2) Remove kick panel and stiffener from dashboard.
(3) Disconnect connector P65 from connector
J65.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter to
connector J65-1.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(8) Position warning light switch to on
(TM 9-2320-365-10).
(9) If 12 vdc is not present, repair wire 509
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(10) If 12 vdc is present, repair wire 509
(para 2-40) or replace warning light cable
assembly (para 22-2).
(11) Position warning light switch to off
(TM 9-2320-365-10).
(12) Position main light switch to OFF
(TM 9-2320-365-10).
(13) Connect connector P65 to connector J65.
(14) Install kick panel (para 16-3).

e53. BACKUP LIGHT DOES NOT ILLUMINATE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Batteries disconnected (para 7-48).

Personnel Required
(2)

Materials/Parts
Packing, Preformed (Item 192, Appendix G)
Wire, Electrical, 50 ft (Item 77, Appendix D)

KNOWN INFO
1.

START

TEST OPTIONS

Is continuity present
through both backup
light lamps?

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
one or both backup light
lamps are faulty.

POSSIBLE PROBLEMS

Faulty backup light lamps.
Faulty backup light
assembly.
Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.

YES
Replace backup light
lamp(s) (para 7-29).

NO

TM 9-2320-365-20-1

2-638 Change 1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breakers CB70 and CB73 prior to
beginning this task.

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

CONTINUITY TEST

Change 1 2-639

TM 9-2320-365-20-1

(1) Loosen six captive screws on lens.
(2) Remove lens from housing.
(3) Remove preformed packing from housing.
Discard preformed packing.
(4) Remove two lamps from sockets.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
center contact of lamp.
(7) Connect negative (-) probe of multimeter to
lamp base and note reading on multimeter.
(8) If continuity is not present, replace one or
both lamps (para 7-29).
(9) Install two lamps in sockets.
(10) Install preformed packing and lens on
housing with six captive screws.
(11) Connect batteries (para 7-48).

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

2.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC present at
connector P87?

Go to step 3 of this fault.

Replace backup light
assembly (para 7-29).

KNOWN INFO

POSSIBLE PROBLEMS

Faulty backup light
assembly.
Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

If 12 VDC is present, backup
light assembly is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.

TM 9-2320-365-20-1

2-640 Change 1

CAUTION

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-641

TM 9-2320-365-20-1

(1) Disconnect connector P87 from backup light
connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P87.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Start engine (TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Select R (reverse) on pushbutton shift
selector (TM 9-2320-365-10) and note
reading on multimeter.
(8) If 12 VDC is not present, go to step 3 of
this faulty. If 12 VDC is present, replace
backup light assembly (para 7-29).
(9) Select N (neutral) on pushbutton shift
selector (TM 9-2320-365-10).
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Shut down engine (TM 9-2320-365-10).
(12) Connect connector P87 to backup light
connector.

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

KNOWN INFO
3.

WARNING
Read WARNING
on following page.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

Is 12 VDC present at circuit
breaker CB73 terminal 7?

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.

If 12 VDC is not present,
wire 1577 is faulty.

Repair wire 1577 from circuit
breaker CB73 terminal 7 to connector
PX15 socket J (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-642 Change 1

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove PDP cover (para 16-2).
(2) Remove circuit breaker CB73 from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
PDP, terminal 7, where circuit breaker CB73
was removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 1577
from circuit breaker CB73 terminal 7 to
connector PX15 socket J (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-643

TM 9-2320-365-20-1

TEST OPTIONS

NO

YES

4.
KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

Is vehicle equipped with
WTEC II transmission
controls?

Go to step 12 of this fault.

Visual Inspection

REASON FOR QUESTION

This question helps
eliminate possible
problems and determines
where troubleshooting
continues.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.

TM 9-2320-365-20-1

2-644 Change 1

(1) Check if vehicle is equipped with WTEC II TEPSS.
(2) If transmission pushbutton shift selector is not
mounted with four screws and does not have a
filter cover, go to step 13 of this fault.

Change 1 2-645

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO
5.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

Is continuity present from
REVERSE WARNING relay
terminal 86 to terminal 85?

Replace REVERSE WARNING
relay in WTEC II VIM (para 8-6).

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
REVERSE WARNING relay
is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.

TM 9-2320-365-20-1

2-646 Change 1

(1) Remove kick panel (para 16-3).
(2) Remove seven screws and washers from
cover.
(3) Remove screw, washer, cover, and nut from
WTEC II VIM.
(4) Remove REVERSE WARNING relay from
WTEC II VIM.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
REVERSE WARNING relay terminal 86.
(7) Connect negative (-) probe of multimeter to
REVERSE WARNING relay terminal 85 and
note reading on multimeter.
(8) If continuity is not present, replace REVERSE
WARNING relay in WTEC II VIM (para 8-6).
(9) Install REVERSE WARNING relay in WTEC II
VIM.
(10) Install cover on WTEC II VIM with
nut, washer, and screw.
(11) Install seven washers and screws
in cover.

CONTINUITY TEST

Change 1 2-647

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

6.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.

If 12 VDC is not present,
wire 1903 is faulty.

Is 12 VDC present at
connector PX33
socket B1?

Repair wire 1903 from connector
PX33 socket B1 to circuit breaker CB73
terminal 8 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10).

TM 9-2320-365-20-1

2-648 Change 1

VOLTAGE TEST

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Loosen screw in connector PX33.
(2) Disconnect connector PX33 from
WTEC II VIM.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector PX33 socket B1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 1903
from connector PX33 socket B1 to
circuit breaker CB73 terminal 8 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-649

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
7.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.

If 12 VDC is not present,
wire 1460 is faulty.

Is 12 VDC present at
connector PX33
socket C1?

Repair wire 1460 from connector
PX33 socket C1 to terminal board TB1
position 60 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10).

TM 9-2320-365-20-1

2-650 Change 1

VOLTAGE TEST

CAUTION

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
connector PX33 socket C1.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1460
from connector PX33 socket C1 to
terminal board TB1 position 60 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-651

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

POSSIBLE PROBLEMS

8.
Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
WTEC II cab transmission
harness is faulty.

Faulty WTEC II cab
transmission harness.
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

Replace WTEC II cab
transmission harness
(para 7-86).

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector J116 socket F2 to
connector J114 socket 13?

TM 9-2320-365-20-1

2-652 Change 1

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-653

TM 9-2320-365-20-1

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector J114 from WTEC II
TEPSS.
(3) Loosen screw in connector J116.
(4) Disconnect connector J116 from WTEC II
VIM.
(5) Connect positive (+) probe of multimeter to
connector J116 socket F2.
(6) Connect negative (-) probe of multimeter to
connector J114 socket 13 and note reading
on multimeter.
(7) If continuity is not present, replace WTEC II
cab transmission harness (para 7-86).
(8) Connect connector J114 to WTEC II TEPSS.
(9) Install instrument panel assembly (para 7-15).
(10) Connect connector J116 to WTEC II VIM.
(11) Tighten screw in connector J116.

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

9.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

If continuity is not present,
wire 490 in WTEC II
dashboard cable assembly
is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.
WTEC II cab transmission
harness OK.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector PX33 socket A1
to connector J51 pin 2?

Repair wire 490 from connector
PX33 socket A1 to connector J51
pin 2 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10).

TM 9-2320-365-20-1

2-654 Change 1

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-655

TM 9-2320-365-20-1

(1) Remove three screws from PDP.
(2) Remove three screws and washers from
PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector P51 from connector
J51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector PX33 socket A1.
(7) Connect negative (-) probe of multimeter to
connector J51 pin 2 and note reading on
multimeter.
(8) If continuity is not present, repair wire 490
from connector PX33 socket A1 to
connector J51 pin 2 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10).
(9) Connect connector PX33 to WTEC II VIM.
(10) Tighten screw in connector PX33.
(11) Install kick panel (para 16-3).

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

10.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

If continuity is not present,
wire 490 in rear lights
cable assembly is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.
WTEC II cab transmission
harness OK.
WTEC II dashboard cable
assembly OK.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector P51 socket 2
to connector P87?

Repair wire 490 from connector P51
socket 2 to connector P87 (para 2-40) or
replace rear lights cable assembly (para 7-75).

TM 9-2320-365-20-1

2-656 Change 1

CONTINUITY TEST

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Disconnect connector P87 from backup light
connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P51 socket 2.
(4) Connect negative (-) probe of multimeter to
connector P87 and note reading on
multimeter.
(5) If continuity is not present, repair wire 490
from connector P51 socket 2 to
connector P87 (para 2-40) or replace rear
lights cable assembly (para 7-75).
(6) Connect connector P87 to backup light
connector.
(7) Connect connector P51 to connector J51.
(8) Install PDP on dashboard with three screws.
(9) Install three washers and screws in PDP.

Change 1 2-657

TM 9-2320-365-20-1

YES

KNOWN INFO
11.

POSSIBLE PROBLEMS

REVERSE WARNING Relay
Replacement Test

REASON FOR QUESTION

TEST OPTIONS

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.
WTEC II cab transmission
harness OK.
WTEC II dashboard cable
assembly OK.
Rear lights cable assembly
OK.

Replace REVERSE WARNING
relay in WTEC II VIM (para 8-6).

TM 9-2320-365-20-1

2-658 Change 1

Do backup lights operate
with new REVERSE
WARNING relay installed
in WTEC II VIM?

Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.

Replace WTEC II
TEPSS (para 8-2).

NO

If backup lights operate
with new REVERSE
WARNING relay installed,
REVERSE WARNING relay
is faulty. If backup lights
do not operate with new
REVERSE WARNING relay
installed, WTEC II TEPSS
is faulty.

Change 1 2-659

TM 9-2320-365-20-1

(1) Replace REVERSE WARNING relay in
WTEC II VIM (para 8-6).
(2) Start engine (TM 9-2320-365-10).
(3) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(4) Select R (reverse) on WTEC II TEPSS
(TM 9-2320-365-10).
(5) Check to see if backup lights operate.
(6) Select N (neutral) on WTEC II TEPSS
(TM 9-2320-365-10).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Shut down engine (TM 9-2320-365-10).
(9) If backup lights do not operate, install
old REVERSE WARNING relay
WTEC II VIM (para 8-6) and replace
WTEC II TEPSS (para 8-2).

YES

KNOWN INFO

REASON FOR QUESTION

TEST OPTIONS

NO

12.

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R Test #91

Replace WTEC III
relay K25 (para 7-9).

Is continuity present from
WTEC III relay K25
terminal 86 to terminal 85?
If continuity is not present,
WTEC III relay K25 if
faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.

TM 9-2320-365-20-1

2-660 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III dashboard
cable assembly.
Faulty rear lights cable
assembly.
Faulty WTEC III
transmission ECU.

CONTINUITY TEST

Change 1 2-661

TM 9-2320-365-20-1

(1) Remove WTEC III relay K25 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
WTEC III relay K25 terminal 86.
(4) Connect negative (-) probe of multimeter to
WTEC III relay K25 terminal 85 and note
reading on multimeter.
(5) If continuity is not present, replace WTEC III
relay K25 (para 7-9).

TEST OPTIONS

REASON FOR QUESTION

NO

YES

Voltage Test or
STE/ICE-R Test #89

KNOWN INFO
13.

POSSIBLE PROBLEMS

Is 12 VDC present at
WTEC III relay K25
terminal 30?

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.

If 12 VDC is not present,
wire 1903 is faulty.

WARNING
Read WARNING
on following page.

Repair wire 1903 from WTEC III
relay K25 terminal 30 to circuit breaker
CB73 terminal 8 (para 2-40) or replace WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-662 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III dashboard
cable assembly.
Faulty rear lights cable
assembly.
Faulty WTEC III
transmission ECU.

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
PDP, where WTEC III relay K25 terminal 30
was removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 1903
from WTEC III relay K25 terminal 30
to circuit breaker CB73 terminal 8
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-663

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

14.

If continuity is not present,
wire 146 is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.

Is continuity present from
WTEC III relay K34
terminal 86 to WTEC III
relay K25 terminal 86?

Repair wire 146 from WTEC III
relay K34 terminal 86 to WTEC III
relay K25 terminal 86 (para 2-40)
or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-664 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III dashboard
cable assembly.
Faulty rear lights cable
assembly.
Faulty WTEC III
transmission ECU.

CONTINUITY TEST

(1) Remove WTEC III relay K34 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
PDP, where WTEC III relay K34 terminal 86
was removed.
(4) Connect negative (-) probe of multimeter to
PDP, where WTEC III relay K25 terminal 86
was removed, and note reading on
multimeter.
(5) If continuity is not present, repair wire 146
from WTEC III relay K34 terminal 86
to WTEC III relay K25 terminal 86
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(6) Install WTEC III relay K34 on PDP.

TM 9-2320-365-20-1

Change 1 2-665

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

15.

If continuity is not present,
wire 113 is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.

CAUTION
Read CAUTION
on following page.

Is continuity present from
WTEC III relay K25
terminal 85 to connector
P115 socket 4?

Repair wire 113 from WTEC III relay
K25 terminal 85 to connector P115
socket 4 (para 2-40) or replace WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-666 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III dashboard
cable assembly.
Faulty rear lights cable
assembly.
Faulty WTEC III
transmission ECU.

CONTINUITY TEST

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

TM 9-2320-365-20-1

Change 1 2-667

(1) Remove kick panel (para 16-3).
(2) Disconnect connector clamp from
connector P115.
(3) Disconnect connector P115 from
WTEC III transmission ECU.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to PDP, where WTEC III relay K25
terminal 85 was removed.
(6) Connect negative (-) probe of multimeter
to connector P115 socket 4 and note
reading on multimeter.
(7) If continuity is not present, repair wire
113 from WTEC III relay K25
terminal 85 to connector P115 socket 4
(para 2-40) or replace WTEC III
dashboard cable assembly (para 7-11).
(8) Connect connector P115 to WTEC III
transmission ECU.
(9) Connect connector clamp to connector P115.

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

16.

If continuity is not present,
wire 490 is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.

CAUTION
Read CAUTION
on following page.

Is continuity present from
WTEC III relay K25
terminal 87 to connector
J51 pin 2?

Repair wire 490 from WTEC III
relay K25 terminal 87 to connector J51
pin 2 (para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

2-668 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III dashboard
cable assembly.
Faulty rear lights cable
assembly.
Faulty WTEC III
transmission ECU.

CONTINUITY TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Remove three screws from PDP.
(2) Remove three screws and washers from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector P51 from connector
J51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
PDP, where WTEC III relay K25 terminal 87
was removed.
(7) Connect negative (-) probe of multimeter to
connector J51 pin 2 and note reading on
multimeter.
(8) If continuity is not present, repair wire 490
from WTEC III relay K25 terminal 87
to connector J51 pin 2 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

TM 9-2320-365-20-1

Change 1 2-669

TEST OPTIONS

REASON FOR QUESTION

NO

YES

KNOWN INFO

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 490 is faulty.

17.

POSSIBLE PROBLEMS

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.
WTEC III dashboard cable
assembly OK.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector P51 socket 2 to
connector P87?

Repair wire 490 from connector
P51 socket 2 to connector P87
(para 2-40) or replace rear lights
cable assembly (para 7-75).

TM 9-2320-365-20-1

2-670 Change 1

Faulty rear lights cable
assembly.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

CONTINUITY TEST

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Disconnect connector P87 from backup
light connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 2.
(4) Connect negative (-) probe of multimeter
to connector P87 and note reading on
multimeter.
(5) If continuity is not present, repair wire 490
from connector P51 socket 2 to
connector P87 (para 2-40) or replace rear
lights cable assembly (para 7-75).
(6) Connect connector P87 to backup light
connector.
(7) Connect connector P51 to connector J51.
(8) Install PDP on dashboard with three screws.
(9) Install three washers and screws in PDP.

TM 9-2320-365-20-1

Change 1 2-671

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO
18.

POSSIBLE PROBLEMS

Do backup lights operate
with new WTEC III relay
K25 installed?

WTEC III Relay K25
Replacement Test

If backup lights operate
with new WTEC III relay
K25 installed, WTEC III
relay K25 is faulty. If
backup lights do not
operate with new WTEC III
relay K25 installed,
WTEC III transmission ECU
is faulty.

e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC III transmission controls.
WTEC III dashboard cable
assembly OK.
Rear lights cable assembly OK.

Replace WTEC III relay
K25 (para 7-9).

YES

Replace WTEC III
transmission ECU
(para 8-7).

NO

TM 9-2320-365-20-1

2-672 Change 1

Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.

TM 9-2320-365-20-1

Change 1 2-673/(2-674 Blank)
All data on pages 2-674 and 2-675 deleted.

(1) Install new WTEC III relay K25 on PDP.
(2) Start engine (TM 9-2320-365-10).
(3) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(4) Select R (reverse) on WTEC III TPSS
(TM 9-2320-365-10).
(5) Check to see if backup lights operate.
(6) Select N (neutral) on WTEC III TPSS
(TM 9-2320-365-10).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Shut down engine (TM 9-2320-365-10).
(9) Remove new WTEC III relay K25 from PDP.
(10) Install old WTEC III relay K25 on PDP.
(11) If backup lights operate, replace WTEC III
relay K25 (para 7-9).
(12) If backup lights do not operate, replace
WTEC III transmission ECU (para 8-7).
(13) Install kick panel (para 16-3).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

e54. BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Circuit breaker CB66 OK.
Turn signals illuminate.
POSSIBLE PROBLEMS
Faulty main light switch.
Faulty dashboard cable
assembly.

If continuity is not present,
main light switch is faulty.
If continuity is present,
wire 1572 is faulty.

START

1.

YES

NO

Repair wire 1572 from connector
PX15 socket E to terminal board TB1
position 56 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
replace WTEC III dashboard cable
assembly (para 7-11).

Replace main light switch (para 7-17).

Is continuity present between
main light switch pins
F and E?

TM 9-2320-365-20-1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB66 prior to beginning this task.

(2-675 Blank)/2-676 Change 1

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

Change 1 2-677

CONTINUITY TEST

(10) Connect connector PX15 to main light
switch.
(11) Install instrument panel assembly (para 7-15).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

(1) Remove instrument panel assembly for
access(para 7-15).
(2) Disconnect connector PX15 from main light
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
main light switch pin F.
(5) Connect negative (-) probe of multimeter to
main light switch pin E.
(6) Position main light switch to BO MARKER
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace main light
switch connector (para 7-17).
(8) If continuity is present, repair wire 1572
from connector PX15 socket E to terminal
board TB1 position 56 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or replace WTEC III dashboard
cable assembly (para 7-11).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
POSSIBLE PROBLEMS

Turn signals illuminate.
Rear hazard lights illuminate.

NO

Faulty dashboard cable
assembly.
Faulty turn signal switch.

YES

Is volts DC pulse present at
connector J19 socket 5?

If volts DC pulse is not
present, wire 1566 is faulty.
If volts DC pulse is present,
turn signal switch is faulty.

e54A. FRONT HAZARD LIGHTS DO NOT ILLUMINATE

INITAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 1566 from connector PX14
socket 2 to connector J19 socket 5 (para
2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace turn signal
switch (para 7-25).

TM 9-2320-365-20-1

2-678 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector J19 from turn signal
switch connector.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector J19 socket 5.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Position hazard lights switch to on
(TM 9-2320-365-10) and note reading on
multimeter.

TM 9-2320-365-20-1

Change 1 2-679

(8) If volts DC pulse is not present, Repair
wire 1566 from connector PX14 socket 2
to connector J19 socket 5 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If volts DC is present, replace turn signal
switch (para 7-25).
(10) Position hazard lights switch to off
(TM 9-2320-365-10).
(11) Position main light switch to OFF
(TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
POSSIBLE PROBLEMS

NO

YES

Front hazard lights illuminate.
Stoplights illuminate.

Faulty dashboard cable
assembly.
Faulty relay K10.

Is volts DC pulse present at
relay K10 socket 87A?

If volts DC pulse is not
present, wire 1566 is faulty.
If volts DC pulse is present,
relay K10 is faulty.

Replace relay K10
(para 7-9).

e55. REAR HAZARD LIGHTS DO NOT ILLUMINATE

INITAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Repair wire 1566 from relay K10 socket
87A to connector PX14 socket 2 (para
2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-680 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove relay K10 from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
PDP, socket 87A, where relay K10 was
removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Position hazard lights switch to on
(TM 9-2320-365-10) and note reading on
multimeter.

TM 9-2320-365-20-1

Change 1 2-681

(8) If volts DC pulse is not present, Repair
wire 1566 from relay K10 socket 87A to
connector PX14 socket 2 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If volts DC is present, replace relay
K10 (para 7-9).
(10) Position hazard lights switch to off
(TM 9-2320-366-10-1).
(11) Position main light switch to OFF
(TM 9-2320-366-10-1).
(12) Install relay K10 in PDP.
(13) Install PDP cover (para 16-2).

Personnel Required
(2)

References
TM 9-4910-571-12&P

INITAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

e56. FRONT AND REAR HAZARD LIGHTS DO NOT ILLUMINATE

START

Is 12 VDC present at
connector PX14 socket 1?

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.

NO

KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

Circuit breaker CB71 OK.
Turn signals illuminate.
POSSIBLE PROBLEMS

Faulty hazard lights switch.
Faulty dashboard cable
assembly.
Faulty relay K9.

Go to step 2 of this fault.

Replace hazard lights
switch (para 7-18).

YES

If 12 VDC is present, hazard
lights switch is faulty.

TM 9-2320-365-20-1

2-682 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB71 prior to beginning
this task.

NOTE

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE
Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector PX14 from hazard
lights switch.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector PX14 socket 1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC is not present, go to step 2
of this fault.
(8) If 12 VDC is present, replace hazard lights
switch (para 7-18).
(9) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-683

e56. FRONT AND REAR HAZARD LIGHTS DO NOT ILLUMINATE (CONT)

3.
KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker CB71 OK.
Turn signals illuminate.
Hazard lights switch OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K9.

Is 12 VDC present at
relay K9 terminal 86?

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present,
wire 1514 is faulty.

Repair wire 1514 from relay K9
terminal 86 to circuit breaker CB 74
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

NO

2.
KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Faulty dashboard cable
assembly.
Faulty relay K9.

Circuit breaker CB71 OK.
Turn signals illuminate.
Hazard lights switch OK.

Is 12 VDC present at
relay K9 terminal 30?

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is not present,
wire 1566 is faulty.

Repair wire 1566 from relay K9
terminal 30 to circuit breaker CB 71
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

NO

WARNING
Read WARNING
on following page.

WARNING
Read WARNING
on following page.

TM 9-2320-365-20-1

2-684 Change 1

VOLTAGE TEST

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove PDP cover (para 16-2).
(2) Remove circuit breaker CB71 from PDP.
(3) Remove relay K9 from PDP.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to PDP, terminal 30, where relay K9 was
removed.
(6) Connect negative (-) probe of multimeter
to ground.
(7) Install circuit breaker CB71 in PDP and
and note reading on multimeter.
(8) If 12 VDC is not present, repair wire
1566 from relay K9 terminal 30 to circuit
breaker CB 71 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to PDP, terminal 86, where relay K9 was
removed.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and not reading on
multimeter.
(5) If 12 VDC is not present, repair wire
1514 from relay K9 terminal 86 to circuit
breaker CB74 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1

All data on pages 2-686 and 2-687 deleted.
Change 1 2-685/(2-686 Blank)

e56. FRONT AND REAR HAZARD LIGHTS DO NOT ILLUMINATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker CB71 OK.
Turn signals illuminate.
Hazard lights switch OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K9.

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

4.

5.

Is continuity present
between relay K9
terminal 85 and a known
good ground?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 3039 is faulty.

Circuit breaker CB71 OK.
Turn signals illuminate.
Hazard lights switch OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K9.

CAUTION
Read CAUTION
on following page.

Is continuity present
between relay K9
terminal 87 and connector
PX14 socket 2?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1565 is faulty. If
continuity is present,
relay K9 is faulty.

Replace relay K9
(para 7-9).

Repair wire 3039 from relay K9 terminal
85 to terminal board TB2 position 56
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1565 from relay K9 terminal
87 to connector PX14 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

(2-687 Blank)/2-688 Change 1

CONTINUITY TEST
(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to PDP, terminal 85, where relay K9 was
removed.
(3) Connect negative (-) probe of multimeter
to ground and note reading on
multimeter.
(4) If continuity is not present, repair wire
1565 from relay K9 terminal 85 to
terminal board TB2 position 56
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to PDP, terminal 87, where relay K9 was
removed.
(3) Connect negative (-) probe of multimeter
to connector PX14 socket 2.
(4) If continuity is not present, repair wire
1565 from relay K9 terminal 87 to
connector PX14 socket 2 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace relay
K9 (para 7-9).
(6) Connect connector PX14 to hazard
lights switch.
(7) Install relay K9 in PDP.
(8) Install PDP cover (para 16-2).
(9) Install instrument panel assembly
(para 7-15).

TM 9-2320-365-20-1

Change 1 2-689

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-690
2-690
2-690
2-690
2-690

START

1.
Circuit breaker OK.
Stoplights operate.
Do hazard lights operate?

Operational Test

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty turn signal switch.
Faulty hazard lights
switch.
Faulty flasher unit.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Go to step 7 of this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-691
2-691
2-691
2-691
2-691

OPERATIONAL TEST

(1) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(2) Position hazard lights switch to on
(TM 9-2320-365-10).
(3) Observe hazard lights.
(4) If hazard lights do not operate, go to step 7
of this fault.
(5) Position hazard lights switch to off
(TM 9-2320-365-10).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-692
2-692
2-692
2-692
2-692

2.

Is 12 vdc present at
connector PX15-F?
If 12 vdc is not present,
wire 1586 is faulty.

YES

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

3.

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty turn signal switch.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty turn signal switch.

Is continuity present
through main light
switch terminals F and J?
If continuity is not present,
main light switch is
faulty.

Voltage Test or
STE/ICE-R #89

Continuity Test or
STE/ICE-R #91

Circuit breaker OK.
Stoplights operate.
Hazard lights switch OK.
Flasher unit OK.

Circuit breaker OK.
Stoplights operate.
Hazard lights switch OK.
Flasher unit OK.

Repair wire 1586 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace main light
switch (para 7-17).

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-693
2-693
2-693
2-693
2-693

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX15 from main light
switch.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector PX15-F.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If 12 vdc is not present, repair wire 1586
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

(1) Remove main light switch (para 7-17).
(2) Set multimeter to ohms.
(3) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(4) Connect positive (+) probe of multimeter to
main light switch terminal F.
(5) Connect negative (-) probe of multimeter to
main light switch terminal J and note
reading on multimeter.
(6) If continuity is not present, replace main
light switch (para 7-17).
(7) Install main light switch (para 7-17).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-694
2-694
2-694
2-694
2-694

YES

4.

Is 12 vdc present at
circuit breaker CB74-5?
If 12 vdc is not present,
wire 1577 is faulty.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty turn signal switch.

Voltage Test or
STE/ICE-R #89

Circuit breaker OK.
Stoplights operate.
Hazard lights switch OK.
Flasher unit OK.
Main light switch OK.

Repair wire 1577 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-695
2-695
2-695
2-695
2-695

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove circuit breaker CB74 from PDP.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
PDP, terminal 5, where circuit breaker CB74
was removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to STOPLIGHT
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, repair wire 1577
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Install circuit breaker CB74 in PDP.
(10) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-696
2-696
2-696
2-696
2-696

5.

Is 12 vdc present at
connector PX14-7?
If 12 vdc is not present,
wire 1514 is faulty.

YES

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Stoplights operate.
Hazard lights switch OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty turn signal switch.

Voltage Test or
STE/ICE-R #89

YES

6.

Is voltage pulse present at
connector J19-12?
If voltage pulse is not
present, wire 1644 is faulty.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Stoplights operate.
Hazard lights switch OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty turn signal switch.

Voltage Test or
STE/ICE-R #89

Repair wire 1514 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1644 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace turn signal
switch (para 7-25).

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-697
2-697
2-697
2-697
2-697

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector PX14 from hazard lights
switch.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector PX14-7.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to STOPLIGHT
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 1514
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) Position main light switch to OFF
(TM 9-2320-365-10).
(8) Connect connector PX14 to hazard light
switch.

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector P19 from connector
J19.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J19-12.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to STOPLIGHT
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If voltage pulse is not present, repair wire
1644 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).
(7) If voltage pulse is present, replace turn
signal switch (para 7-25).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect connector P19 to connector J19.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-698
2-698
2-698
2-698
2-698

7.

Is continuity present
between hazard lights
switch terminals 7 and 5?
If continuity is not present,
hazard lights switch is
faulty.

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Stoplights operate.
Main light switch OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R #91

YES

8.

Is 12 vdc present at
connector PX20-B?
If 12 vdc is not present,
wire 1567 is faulty.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Stoplights operate.
Main light switch OK.
Turn signal switch OK.
Hazard lights switch OK.

POSSIBLE PROBLEMS

Voltage Test or
STE/ICE-R #89

Faulty hazard lights switch.
Faulty dashboard cable
assembly.
Faulty flasher unit.

Faulty dashboard cable
assembly.
Faulty flasher unit.

Replace hazard lights
switch (para 7-18).

Repair wire 1567 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-699
2-699
2-699
2-699
2-699

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX14 from hazard
lights switch.
(3) Set multimeter to volts dc.
(4) Position hazard lights switch to on
(TM 9-2320-365-10).
(5) Connect positive (+) probe of multimeter to
hazard lights switch terminal 7.
(6) Connect negative (-) probe of multimeter to
hazard lights switch terminal 5 and note
reading on multimeter.
(7) If continuity is not present, replace hazard
lights switch (para 7-18).
(8) Connect connector PX14 to hazard lights
switch.

(1) Remove kick panel (para 16-3).
(2) Remove two screws, washers, and flasher
unit from dashboard.
(3) Disconnect connector PX20 from flasher unit.
(4) Position hazard light switch to off
(TM 9-2320-365-10).
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
connector PX20-B.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position main light switch to STOPLIGHT
(TM 9-2320-365-10) and note reading on
multimeter.
(9) If 12 vdc is not present, repair wire 1567
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(10) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-700
2-700
2-700
2-700
2-700

YES

9.

Is continuity present
between connector PX20-A
and connector PX14-6?
If continuity is not present,
wire 1568 is faulty.

NO

Circuit breaker OK.
Stoplights operate.
Main light switch OK.
Turn signal switch OK.
Hazard lights switch OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

YES

10.

Is continuity present
between connector PX20-C
and a known good ground?

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Stoplights operate.
Main light switch OK.
Turn signal switch OK.
Hazard lights switch OK.

Continuity Test or
STE/ICE-R #91

Faulty dashboard cable
assembly.
Faulty flasher unit.

Faulty dashboard cable
assembly.
Faulty flasher unit.

If continuity is not present,
wire 3049 is faulty. If
continuity is present,
flasher unit is faulty.

Repair wire 1568 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3049 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace flasher
unit (para 7-24).

e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)
e57. FRONT AND REAR TURN SIGNALS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-701
2-701
2-701
2-701
2-701

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector PX14 from hazard
lights switch.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX20-A.
(4) Connect negative (-) probe of multimeter to
connector PX14-6 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1568
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Connect connector PX14 to hazard lights
switch.
(7) Install instrument panel assembly (para 7-15).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX20-C.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3049
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace flasher unit
(para 7-24).
(6) Connect connector PX20 to flasher unit.
(7) Install flasher unit on dashboard with two
washers and screws.
(8) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-702
2-702
2-702
2-702
2-702

START

1.
Right and left
rear turn signals operate.

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE

Faulty lamp.
Faulty front lights cable
assembly.
Faulty composite front
light assembly.
Faulty dashboard cable
assembly.

Is continuity present
through lamp?
If continuity is not present,
lamp is faulty.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Packing, Preformed (Item 170, Appendix G)
Lockwasher (Item 92, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Replace lamp
(para 7-33).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-703
2-703
2-703
2-703
2-703

CONTINUITY TEST

(1) Loosen five screws on cover.
(2) Remove cover and preformed packing from
housing. Discard preformed packing.
(3) Remove lamp from socket.
(4) Set multimeter to ohms.
(5) Check continuity through lamp and note
reading on multimeter.
(6) If continuity is not present, replace
lamp (para 7-33).
(7) Install turn signal lamp in socket.
(8) Install preformed packing and cover on housing
with five screws.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-704
2-704
2-704
2-704
2-704

2.

Is 12 vdc present at
connector P23 (LH) or
connector P9 (RH)?

YES

This question eliminates
possible problems and
determines where
troubleshooting continues.

WARNING
Read WARNING
on following page.

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

Faulty front lights cable
assembly.
Faulty composite front
light assembly.
Faulty dashboard cable
assembly.

Right and left
rear turn signals operate.
Lamp OK.

Go to step 4 of this fault.

e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-705
2-705
2-705
2-705
2-705

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector P23 (LH composite front
light assembly) or P9 (RH composite front
light assembly) from composite front light
assembly connector.
(3) Lower cab (TM 9-2320-365-10).
(4) Connect positive (+) probe of multimeter to
connector P23 (LH composite front light
assembly) or P9 (RH composite front light
light assembly).
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(7) Position turn signal switch to left turn or
right turn position (TM 9-2320-365-10)
and note reading on multimeter.
(8) If 12 vdc is not present, go to step 4 of this
fault.
(9) Position turn signal switch to off
(TM 9-2320-365-10).
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Raise cab (TM 9-2320-365-10).
(12) Connect connector P23 (LH composite front
light assembly) or P9 (RH composite front light
assembly) to composite front light assembly
connector.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-706
2-706
2-706
2-706
2-706

3.

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.
Faulty composite front
light assembly.

If continuity is not present,
wire 3091 is faulty. If
continuity is present,
composite front light
assembly is faulty.

Is continuity present
between terminal lug TL79
(LH) or TL70 (RH) and
a known good ground?

Right and left
rear turn signals operate.
Lamp OK.
Dashboard cable
assembly OK.

Repair wire 3091 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace composite front
light assembly (para 7-33).

e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-707
2-707
2-707
2-707
2-707

CONTINUITY TEST

(1) Remove screw, lockwasher, and terminal
lug TL79 (LH) or TL70 (RH) from composite
front light light assembly. Discard lockwasher.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL79 (LH) or TL90 (RH).
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3091
(para 2-40) or replace front lights cable
assembly (para 7-74).
(6) If continuity is present, replace composite front
light assembly (para 7-33).
(7) Install terminal lug TL79 (LH) or TL90 (RH),
lockwasher, and screw on composite front
light assembly.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-708
2-708
2-708
2-708
2-708

4.

Is 12 vdc present at
connector J27-14 (LH) or
connector J27-11 (RH)?
If 12 vdc is not present,
wire 1581 (LH ) or
1524 (RH) is faulty. If
12 vdc is present,
wire 461 (LH) or
460 (RH) is faulty.

YES

NO

KNOWN INFO

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Right and left
rear turn signals operate.
Lamp OK.
Composite front light
assembly OK.

Repair wire 1581 (LH) or
wire 1524 (RH) (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 461 (LH) or
wire 460 (RH) (para 2-40)
or replace front lights
cable assembly (para 7-74).

e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)
e58. LEFT OR RIGHT FRONT TURN SIGNAL DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-709
2-709
2-709
2-709
2-709

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector P27.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector J27-14 (LH) or J27-11 (RH).
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(10) Position turn signal switch to up for
right turn signal operation or down for
left turn signal operation (TM 9-2320-365-10).
(11) If 12 vdc is not present, repair wire 1581
(LH) or wire 1524 (RH) (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(12) If 12 vdc is present, repair wire 461 (LH)
or wire 460 (RH) (para 2-40) or replace
front lights cable assembly (para 7-74).
(13) Position main light switch to OFF
(TM 9-2320-365-10).
(14) Position turn signal switch to middle
(off) (TM 9-2320-365-10).
(15) Connect connector P27 to connector J27.
(16) Install PDP on dashboard with three screws.
(17) Install three washers and screws in PDP.
(18) Install PDP cover (para 16-2).

KNOWN INFO
TEST OPTIONS

Does one
stoplight illuminate?

NO

Go to step 10 of this fault.
YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

YES

NO

2.

If continuity is not present,
lamp is faulty.

Is continuity present
through lamp?

Faulty lamp.
Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

POSSIBLE PROBLEMS

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.

1.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Packing, Preformed (Item 170, Appendix G)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P

Replace lamp
(para 7-32).

TM 9-2320-365-20-1

2-710 Change 1

This question eliminates
possible faults and
determines where
troubleshooting continues.

Operational Test

REASON FOR QUESTION

START

Faulty lamp.
Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.
Faulty main light switch.
Faulty diode D1A.
Faulty relay K10.

POSSIBLE PROBLEMS

Blackout stoplights illuminate.

CONTINUITY TEST

(1) Position master power switch to on
(TM 9-2320-365-10).
(2) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(3) Apply brakes and observe stoplights.
(4) If both stoplights do not
illuminate, go to step 5 of this fault.
(5) Position main light switch to OFF
(TM 9-2320-365-10).
(6) Position master power switch to
off (TM 9-2320-365-10).

(1) Loosen six screws on composite taillight
assembly cover.
(2) Remove cover and preformed packing from
housing. Discard preformed packing.
(3) Remove lamp from socket.
(4) Set multimeter to ohms.
(5) Check continuity through lamp.
(6) If continuity is not present, replace lamp
(para 7-32).

TM 9-2320-365-20-1

Change 1 2-711

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-712 Change 1

WARNING
Read WARNING
on following page.

Is 12 VDC present at
stoplight lamp
socket center contact?

3.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

NO

Go to step 5 of this fault.
YES

TM 9-2320-365-20-1

Change 1 2-713

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
stoplight lamp socket center contact.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(6) Apply brakes and note reading on
multimeter.
(7) If 12 VDC is not present, go to step 5 of
this fault.
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Position main light switch to OFF
(TM 9-2320-365-10).
(10) Install lamp in socket.
(11) Install preformed packing and cover
on housing with six screws.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

TEST OPTIONS

NO

YES

Operational Test

REASON FOR QUESTION

4.

Does taillight illuminate?
If taillight does not illuminate,
wire 3094 (LH) or wire 3095
(RH) is faulty. If taillight
illuminates, composite taillight
assembly is faulty.

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

Replace composite taillight
assembly (para 7-32).

Repair wire 3094 from TL18 to TL93 (LH)
or wire 3095 from TL21 to TL92 (RH).

TM 9-2320-365-20-1

2-714 Change 1

(1) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(2) Observe taillight in housing with
non-illuminating stoplight.
(3) If taillight does not illuminate, repair wire
3094 from TL18 to TL93 (LH) or wire 3095
from TL21 to TL92 (RH).
(4) If taillight illuminates, replace composite
taillight assembly (para 7-32).
(5) Position main light switch to OFF
(TM 9-2320-365-10).

Change 1 2-714.1

TM 9-2320-365-20-1

KNOWN INFO

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

NO

YES

5.

Go to step 6 of this fault.

Is 12 VDC present at
connect P74 (LH) or
connector P61 (RH)?
If 12 VDC is present,
composite taillight assembly
is faulty.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

Replace composite taillight
assembly (para 7-32).

TM 9-2320-365-20-1

2-714.2 Change 1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

VOLTAGE TEST

TM 9-2320-365-20-1

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Change 1 2-715

(1) Disconnect connector P74 (LH) or
connector P61 (RH) from stoplight connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P74 or connector P61.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(7) Apply brakes and note reading on multimeter.
(8) If 12 VDC is not present, go to step 6 of
this fault.
(9) If 12 VDC is present, replace composite
taillight assembly (para 7-32).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Connect connector P74 or connector P61
to stoplight connector.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-716 Change 1

CAUTION
Read CAUTION
on following page.
6.

Is continuity present from
turn signal switch connector
socket 2 (LH) or socket 3
(RH) to socket 6?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.

KNOWN INFO

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.
Composite taillight assembly
OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

NO

Replace turn signal
switch (para 7-25).
YES

CAUTION

Change 1 2-716.1

TM 9-2320-365-20-1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect turn signal switch connector
from connector J19.
(3) Position turn signal switch to center
position (TM 9-2320-365-10).
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to turn signal switch connector socket 6.
(6) Connect negative (-) probe of multimeter
to turn signal switch connector socket 2
(LH) or socket 3 (RH) and note reading on
multimeter.
(7) If continuity is not present, replace turn
signal switch (para 7-25).
(8) Connect connector J19 to turn signal
switch connector.
(9) Install instrument panel assembly (para 7-15).

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-716.2 Change 1

WARNING
Read WARNING
on following page.
7.

Is 12 VDC present at
diode D1B-4 (LH) or
diode D2A-2 (RH)?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
If 12 VDC is not present wire
461B (LH) or wire 460B (RH)
is faulty.

KNOWN INFO

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.
Composite taillight assembly
OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

NO

Repair wire 461B from diode D1B
terminal 4 to connector J19 pin 2 (LH) or
wire 460B from diode D2A terminal 2 to connector
J19 pin 3 (RH) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

YES

Change 1 2-717

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove diode D1B (LH) or diode D2A
(RH) from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to PDP, terminal 4 (LH) or terminal 2 (RH)
where diode D1B (LH) or diode D2A (RH)
was removed.
(5) Connect negative (-) probe of multimeter
to ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(8) Apply brakes and note reading on
multimeter.
(9) If 12 VDC is not present, repair wire
461B from diode D1B terminal 4 to
connector J19 pin 2 (LH) or wire 460B
from diode D2A terminal 2 to connector
J19 pin 3 (RH) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11).
(10) Position master power switch to off
(TM 9-2320-365-10).

(11) Position main light switch to OFF
(TM 9-2320-365-10).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

8.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

If 12 VDC is present wire
461B (LH) or wire 460B (RH)
is faulty.

Go to step 9 of this fault.

Faulty rear lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

POSSIBLE PROBLEMS

Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.
Composite taillight assembly
OK.
Turn signal switch OK.

Is 12 VDC present at
connector J51 pin 5 (LH) or
connector J51 pin 4 (RH)?

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

Repair wire 461B from connector
P51 socket 5 to connector P74 (LH)
or wire 460B from connector P51 socket 4
to connector P61 (RH) or replace rear
lights cable assembly (para 7-75).

TM 9-2320-365-20-1

2-718 Change 1

(13) Position main light switch to OFF
(TM 9-2320-365-10).
(14) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

Change 1 2-718.1

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter to
connector J51 pin 5 (LH) or pin 4 (RH).
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(10) Apply brakes and note reading on
multimeter.
(11) If 12 VDC is not present, got to step 9 of
this faulty.
(12) If 12 VDC is present, repair wire 461B
from connector P51 socket 5 to connector
P74 (LH) or wire 460B from connector P51
socket 4 to connector P61 (RH) or replace
rear lights cable assembly (para 7-75).

VOLTAGE TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89
Blackout stoplights illuminate.
Main light switch OK.
Diode D1A OK.
Relay K10 OK.
Lamp OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Rear lights cable assembly OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty diode D1B.
Faulty diode D2A.

Is continuity present from
diode D1B terminal 3 to
connector J51 pin 5 (LH)
or diode D2A terminal 1 to
connector J51 pin 4 (RH)?

Replace diode D1B (LH) or
diode D2A (RH) (para 7-9).

Repair wire 461B from diode D1B
terminal 3 to connector J51 pin 5 (LH)
or wire 460B from diode D2A terminal 1 to
connector J51 pin 4 (RH) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

If 12 continuity is not present
wire 461B (LH) or wire 460B
(RH) is faulty. If continuity is
present, diode D1B (LH) or
diode D2A (RH) is faulty.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

9.

TM 9-2320-365-20-1

2-718.2 Change 1

CAUTION

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Set multimeter to volts ohms.
(2) Connect positive (+) probe of multimeter to
diode D1B terminal 3 (LH) or diode D2A
terminal 1 (RH).
(3) Connect negative (-) probe of multimeter to
connector J51 pin 5 (LH) or pin 4 (RH)
and note reading on multimeter.
(4) If continuity is not present, repair wire 461B
from connector J51 pin 5 to diode D1B
terminal 3 (LH) or wire 460B from connector
J51 pin 4 to diode D2A terminal 1 (RH) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) Connect connector J51 to connector P51.
(6) Install PDP on dashboard with three screws.
(7) Install three washers and screws in PDP.
(8) Install diode D1B (LH) or diode D2A (RH)
in PDP.
(9) Install PDP cover (para 16-2).

TM 9-2320-365-20-1

Change 1 2-719

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

Faulty dashboard cable
assembly.
Faulty main light switch.
Faulty diode D1A.
Faulty relay K10.

POSSIBLE PROBLEMS

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

11.

10.

YES

NO

NO

WARNING
Read WARNING
on following page.

POSSIBLE PROBLEMS

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.

Faulty dashboard cable
assembly.
Faulty diode D1A.
Faulty relay K10.

Replace main light
switch (para 7-17).

Is 12 VDC present at
diode D1A terminal 2?
If 12 VDC is not present,
wire 22 is faulty.

YES

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-720 Change 1

If continuity is not present,
main light switch is faulty.

REASON FOR QUESTION
Is continuity present from
main light switch pin K
to pin C?

Repair wire 22 from diode D1A
terminal 2 to connector PX15 socket C
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or
WTEC III dashboard cable
assembly (para 7-11).

CONTINUITY TEST

VOLTAGE TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Remove instrument panel assembly
for access (para 7-15).
(2) Disconnect connector PX15 from main
light switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to main light switch pin K.
(5) Connect negative (-) probe of multimeter
to main light switch pin C.
(6) Position main light switch to STOPLIGHT
(TM 9-2320-365-10) and note reading
on multimeter.
(7) If continuity is not present, replace main
light switch (para 7-17).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Connect connector PX15 to main light
switch.

TM 9-2320-365-20-1

Change 1 2-721

(1) Remove PDP cover (para 16-2).
(2) Remove diode D1A from PDP.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter
to PDP, terminal 2, where diode D1A was
removed.
(5) Connect negative (-) probe of multimeter
to ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(8) Apply brakes and note reading on
multimeter.
(9) If 12 VDC is not present, repair wire 22
from diode D1A terminal 2 to connector
PX15 socket C (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Position master power switch to off
(TM 9-2320-365-10).

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-722 Change 1

WARNING
Read WARNING
on following page.
12.

Is 12 VDC present at
terminal block TB1
position 27?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible faults and
determines where
troubleshooting continues.

KNOWN INFO

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty diode D1A.
Faulty relay K10.

NO

Go to step 17 of this fault.
YES

Change 1 2-722.1

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter
to terminal block TB1 position 27.
(6) Connect negative (-) probe of multimeter
to ground.
(7) Position master power switch to on
(TM 9-2320-365-10).
(8) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(9) Apply brakes and note reading on
multimeter.
(10) If 12 VDC is not present, go to step 17
of this fault.
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Position master power switch to off
(TM 9-2320-365-10).
(13) Install PDP on dashboard with three
screws.
(14) Install three washers and screws in PDP.
(15) Install diode D1A in PDP.

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-722.2 Change 1

WARNING
Read WARNING
on following page.
13.

Is 12 VDC present at relay
K10 terminal 86?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

KNOWN INFO

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.
Diode D1A OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K10.

Repair wire 1940 from relay K10
terminal 86 to terminal board TB1
position 29 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable
assembly (para 7-11).

YES

If 12 VDC is not present, wire
1940 is faulty.

NO

VOLTAGE TEST

TM 9-2320-365-20-1

Change 1 2-723

(1) Remove relay K10 from PDP.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to PDP, terminal 86, where relay K10
was removed.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 12 VDC is not present, repair wire
1940 from relay K10 terminal 86 to
terminal board TB1 position 29
(para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly (para 7-11).
(9) Position main light switch to OFF
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

YES

NO

NO

WARNING
Read WARNING
on following page.

YES

14.

15.

Is 12 VDC present at
relay K10 terminal 87?
If 12 VDC is not present,
wire 1940 is faulty.

KNOWN INFO

Faulty dashboard cable
assembly.
Faulty relay K10.

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.
Diode D1A OK.

POSSIBLE PROBLEMS

KNOWN INFO

Faulty dashboard cable
assembly.
Faulty relay K10.

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.
Diode D1A OK.

POSSIBLE PROBLEMS

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-724 Change 1

Is continuity present from
relay K10 terminal 85 to
ground?

REASON FOR QUESTION

If continuity is not present,
wire 3046 is faulty.

Repair wire 1940 from relay K10 terminal
87 to terminal board TB1 position 29 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Repair wire 3046 from relay K10
terminal 85 to terminal board TB2 position
60 (para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

VOLTAGE TEST

WARNING

CONTINUITY TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

Change 1 2-725

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to PDP, terminal 87, where relay K10
was removed.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position main light switch to STOPLIGHT
(TM 9-2320-365-10).
(6) Apply brakes and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire
1940 from relay K10 terminal 87 to
terminal board TB1 position 29
(para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Position master power switch to off
(TM 9-2320-365-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to PDP, terminal 85, where relay K10
was removed.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3046
from relay K10 terminal 85 to terminal board
TB2 position 60 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

Replace relay K10
(para 7-9).

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-726 Change 1

CAUTION
Read CAUTION
on following page.
16.

Is continuity present from
relay K10 terminal 30 to
connector J19 socket 6?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.
Diode D1A OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K10.

NO

Repair wire 1594 from relay K10
terminal 30 to connector J19 socket 6
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

If continuity is not present,
wire 1594 is faulty. If
continuity is present, relay
K10 is faulty.

Change 1 2-726.1

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Disconnect turn signal switch connector
from connector J19.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to PDP, terminal 30, where relay K10 was
removed.
(4) Connect negative (-) probe of multimeter
to connector J19 socket 6.
(5) If continuity is not present, repair wire
1594 from relay K10 terminal 30 to
connector J19 socket 6 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) If continuity is present, replace relay K10
(para 7-9).
(7) Connect connector J19 to turn signal switch
connector.
(8) Install instrument panel assembly (para 7-15).
(9) Install relay K10 in PDP.
(10) Install PDP cover (para 16-2).

e59. ONE OR BOTH STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-726.2 Change 1

Is continuity present from
terminal board TB1 position
27 to diode D1A terminal 1?

17.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
If continuity is not present,
wire 22 is faulty.

KNOWN INFO

Blackout stoplights illuminate.
Lamp OK.
Rear lights cable assembly
OK.
Composite taillight assembly
OK.
Turn signal switch OK.
Diode D1B OK.
Diode D2A OK.
Main light switch OK.
Relay K10 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty diode D1A.

NO

Repair wire 22 from terminal board TB1
position 27 to diode D1A terminal 1
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

Replace diode D1A
(para 7-9).

Change 1 2-727

TM 9-2320-365-20-1

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to terminal board TB1 position 27.
(6) Connect negative (-) probe of multimeter
to diode D1A terminal 1 and note reading
on multimeter.
(7) If continuity is not present, repair wire 22
from terminal board TB1 position 27 to
diode D1A terminal 1 (para 2-40) 1 or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) If continuity is present, replace diode D1A
(para 7-9).
(9) Install PDP on dashboard with three screws.
(10) Install three washers and screws in PDP.
(11) Install diode D1A in PDP.
(12) Install PDP cover (para 16-2).

CONTINUITY TEST

1.
KNOWN INFO
TEST OPTIONS

NO

YES
Go to step 5 of this fault.

Operational Test

Does one blackout
stoplight illuminate?

Stoplights operate in normal
mode.

POSSIBLE PROBLEMS

Faulty composite taillight
assembly.
Faulty lamp.
Faulty rear lights cable
assembly.
Faulty main light switch.
Faulty dashboard cable
assembly.

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE

TM 9-2320-365-20-1

2-728 Change 1

REASON FOR QUESTION

This question eliminates
possible faults and
determines where
troubleshooting continues.

START

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Packing, Preformed (Item 170, Appendix G)

Personnel Required
(2)

References
TM 9-4910-571-12&P

(1) Position master power switch to on
(TM 9-2320-365-10).
(2) Position main light switch to BO DRIVE
(TM 9-2320-365-10).
(3) Apply brakes and observe blackout
stoplights.
(4) If both blackout stoplights do not
illuminate, go to step 5 of this fault.
(5) Position main light switch to OFF
(TM 9-2320-365-10).
(6) Position master power switch to
off (TM 9-2320-365-10).

Change 1 2-729

TM 9-2320-365-20-1

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-730 Change 1

WARNING
Read WARNING
on following page.
2.

Is 12 VDC present at
blackout stoplight lamp
socket center contact?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
This question eliminates possible
faults and determines where
troubleshooting continues.

KNOWN INFO

Stoplights illuminate in normal
mode.
Dashboard cable assembly OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.
Faulty lamp.

Go to step 4 of this fault.
YES

NO

Change 1 2-731

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Loosen six screws and remove cover and
preformed packing from composite taillight
assembly housing. Discard preformed
packing.
(2) Remove lamp from socket.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
blackout stoplight lamp socket center contact.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position main light switch to BO DRIVE
(TM 9-2320-365-10).
(8) Apply brakes and note reading on multimeter.
(9) If 12 VDC is not present, go to step 4 of
this fault.
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Position main light switch to OFF
(TM 9-2320-365-10).

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-732 Change 1

Is continuity present from
terminal lug TL18 (LH) or
TL21 (RH) to blackout
stoplight lamp socket?

3.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
composite taillight assembly is
faulty. If continuity is present,
lamp is faulty.

KNOWN INFO

Stoplights illuminate in normal
mode.
Dashboard cable assembly OK.
Main light switch OK.
Rear lights cable assembly OK.

POSSIBLE PROBLEMS
Faulty composite taillight
assembly.
Faulty lamp.

NO

Replace composite taillight
assembly (para 7-32).
YES

Replace lamp
(para 7-32).

Change 1 2-733

TM 9-2320-365-20-1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to terminal lug TL18 (LH) or TL21 (RH).
(3) Connect negative (-) probe of multimeter
to blackout stoplight lamp socket and
note reading on multimeter.
(4) If continuity is not present, replace
composite taillight assembly (para 7-32).
(5) If continuity is present, replace lamp
(para 7-32).
(6) Install lamp in socket.
(7) Install preformed packing and cover on
housing with six screws.

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-734 Change 1

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
4.

Is 12 VDC present at
connector P77 (LH) or
connector P63 (RH)?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 12 VDC is not present, wire
23 is faulty. If 12 VDC is
present, composite taillight
assembly is faulty.

KNOWN INFO

Stoplights illuminate in normal
mode.
Dashboard cable assembly OK.
Main light switch OK.
Lamp OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty composite taillight
assembly.

NO

Repair wire 23 from connector P77 (LH)
or connector P63 (RH) to splice E18
(para 2-40) or replace rear lights cable
assembly (para 7-75).

YES

Replace composite taillight
assembly (para 7-32).

Change 1 2-735

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Disconnect connector P77 (LH) or
connector P63 (RH) from blackout
stoplight connector.
(3) Connect positive (+) probe of multimeter
to connector P77 or connector P63.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to BO DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 12 VDC is not present, repair
wire 23 from connector P77 (LH)
or connector P63 (RH) to splice E18
(para 2-40) or replace rear lights
cable assembly (para 7-75).
(9) If 12 VDC is present, replace composite
taillight assembly (para 7-32).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Position main light switch to OFF
(TM 9-2320-365-10).
(12) Install lamp in socket.

(13) Install preformed packing and cover on
housing with six screws.

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-736 Change 1

Is continuity present from
main light switch pin K
to pin N?

5.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
If continuity is not present,
main light switch is faulty.

KNOWN INFO

Stoplights illuminate in normal
mode.
Composite taillight assembly
OK.
Lamp OK.

POSSIBLE PROBLEMS

Faulty main light switch.
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.

NO

Replace main light
switch (para 7-17).
YES

Change 1 2-737

TM 9-2320-365-20-1

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector PX15 from main
light switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to main light switch pin K.
(5) Connect negative (-) probe of multimeter
to main light switch pin N.
(6) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace main
light switch (para 7-17).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

CONTINUITY TEST

e60. ONE OR BOTH BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-738 Change 1

CAUTION
Read CAUTION
on following page.
6.

Is continuity present from
connector PX15 socket N
to connector J51 pin 6?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 23 in dashboard cable
assembly is faulty. If
continuity is present, wire 23
in rear lights cable assembly
is faulty.

KNOWN INFO

Stoplights illuminate in normal
mode.
Composite taillight assembly
OK.
Lamp OK.
Main light switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.

NO

Repair wire 23 from connector PX15
socket N to connector J51 pin 6
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

Repair wire 23 from connector P51
socket 6 to splice E18 (para 2-40) or
replace rear lights cable assembly
(para 7-75).

Change 1 2-739

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J51 from connector
P51.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter
to connector PX15 socket N.
(8) Connect negative (-) probe of multimeter
to connector J51 pin 6 and note reading
on multimeter.
(9) If continuity is not present, repair wire 23
from connector PX15 socket N to
connector J51 pin 6 (para 2-40) or replace
WTEC II dashboard cable assembly (para
7-10) or WTEC III dashboard cable
assembly (para 7-11).
(10) If continuity is present, repair wire 23
from connector P51socket 6 to splice E18
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(11) Connect connector PX15 to main light
switch.
(12) Install instrument panel assembly
(para 7-15).
(13) Connect connector J51 to connector P51.
(14) Install PDP on dashboard with three
screws.
(15) Install three washers and screws in PDP.
(16) Install PDP cover (para 16-2).

2-740

TM 9-2320-365-20-1

e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K6.
Faulty stoplight switches.

1.

START

WARNING
Read WARNING
on following page.

Is 12 vdc present on relay
K6 terminal 86?

Go to step 7 of this fault.
YES

NO

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-741
2-741
2-741
2-741
2-741

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove relay K6 from PDP.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
PDP, terminal 86, where relay K6 was
removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, go to step 7 of
this fault.
(8) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-742
2-742
2-742
2-742
2-742

YES

NO

2.

3.

Brakes operate.
Engine starts.
Circuit breaker OK.

YES

NO

This question eliminates
possible problems and
determines where
troubleshooting continues.

If 12 vdc is not present,
wire 1641 is faulty.

Faulty dashboard cable
assembly.
Faulty relay K6.
Faulty stoplight switches.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Go to step 5 of this fault.

WARNING
Read WARNING
on following page.

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.
Stoplight switches OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K6.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Is continuity present
between relay K6
terminal 85 and a known
good ground while
depressing brake pedal?

Is 12 vdc present at
relay K6 terminal 30?

Repair wire 1641 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-743
2-743
2-743
2-743
2-743

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K6 was removed.
(3) Connect negative (-) probe of multimeter to
ground.

NOTE
Full system air pressure is required
to actuate stoplights.

(4) Apply brakes (TM 9-2320-365-10) and note
reading on multimeter.
(5) If continuity is not present, go to step 5 of this
fault.

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 30, where relay K6 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 vdc is not present, repair wire 1641
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-744
2-744
2-744
2-744
2-744

4.

If continuity is not present,
wire 1404 is faulty. If
continuity is present,
relay K6 is faulty.

Is continuity present
between relay K6
terminal 87 and
connector PX15-K?

YES

NO

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.
Stoplight switches OK.

Faulty dashboard cable
assembly.
Faulty relay K6.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1404 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace relay K6
(para 7-9).

e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-745
2-745
2-745
2-745
2-745

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX15 from main light
switch.
(3) Connect positive (+) probe of multimeter to
connector PX15-K.
(4) Connect negative (-) probe of multimeter to
PDP, terminal 87, where relay K6 was removed,
and note reading on multimeter.
(5) If continuity is not present, repair wire 1404
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(6) If continuity is present, replace relay K6
(para 7-9).
(7) Install relay K6 in PDP.
(8) Install PDP cover (para 16-2).
(9) Connect connector PX15 to main light switch.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-746
2-746
2-746
2-746
2-746

5.

Is continuity present
between relay K6
terminal 85 and
terminal lug TL154?

YES

NO

If continuity is not present,
wire 1594 is faulty.

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.
Relay K6 OK.

Faulty dashboard cable
assembly.
Faulty stoplight switches.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

NO

6.

Is continuity present
between terminal lug TL155
and a known good ground?
If continuity is not present,
wire 3043 is faulty. If
continuity is present,
stoplight switches are
faulty.

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.
Relay K6 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty stoplight switches.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1594 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3043 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
(para 7-11).

Replace stoplight
switches (para 11-25).

e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-747
2-747
2-747
2-747
2-747

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
terminal lug TL154.
(3) Connect negative (-) probe of multimeter to
PDP, terminal 85, where relay K6 was
removed, and note reading on multimeter.
(4) If continuity is not present, repair wire 1594
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) Install relay K6 in PDP.
(6) Install PDP cover (para 16-2).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
terminal lug TL155.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3043
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace both stoplight
switches (para 11-25).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-748
2-748
2-748
2-748
2-748

KNOWN INFO

Brakes operate.
Engine starts.
Circuit breaker OK.
Relay K6 OK.
Stoplight switches OK.

Faulty dashboard cable
assembly.

POSSIBLE PROBLEMS

7.

Is 12 vdc present on
circuit breaker CB76-3?

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

If 12 vdc is not present,
wire 1548 is faulty. If
12 vdc is present,
wire 1641 is faulty.

NO

YES

WARNING
Read WARNING
on following page.

Repair wire 1548 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1641 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)
e61. STOPLIGHTS AND BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Remove circuit breaker CB76 from PDP.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter
to PDP, terminal 3, where circuit breaker
CB76 was removed.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 1548
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If 12 vdc is present, repair wire 1641
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Install circuit breaker CB76 in PDP.
(10) Install relay K6 in PDP.
(11) Install PDP cover (para 16-2).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

2-749

1.
KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K28.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.

TM 9-2320-365-20-1

2-750 Change 1

NOTE

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB41 prior to beginning this task.

REASON FOR QUESTION

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

NO

Go to step 2 of this fault.
YES

Troubleshoot trailer electrical
system per trailer technical
manual.

Is 24 VDC present at
connector J130 socket E?

If 24 VDC is present, trailer
electrical system is faulty.

START

Change 1 2-751

TM 9-2320-365-20-1

VOLTAGE TEST

NOTE

CAUTION

WARNING

(1) Lift cover on connector J130 intervehicular
24 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector J130 socket E.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(6) If 24 VDC is not present, go to step 2
of this fault.
(7) If 24 VDC is present, troubleshoot trailer
electrical system per trailer technical
manual.
(8) Position main light switch to OFF
(TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-752 Change 1

CAUTION
Read CAUTION
on following page.
2.

Is continuity present from
connector J130 socket E
to relay K28 terminal 87?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K28.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

Go to step 6 of this fault.
YES

WARNING
Read WARNING
on following page.
3.

Is 24 VDC present at
relay K28 terminal 30
on PDP?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 24 VDC is not present, wire
1957 is faulty.

KNOWN INFO

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K28.
NO

Repair wire 1957 from K28 terminal 30 on PDP
to circuit breaker CB41 terminal 2 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

VOLTAGE TEST

CAUTION

Change 1 2-753

TM 9-2320-365-20-1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K28 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 24 VDC is not present, repair wire 1957
from K28 terminal 30 on PDP to circuit
breaker CB41 terminal 2 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

(1) Remove PDP cover (para 16-2).
(2) Remove relay K28 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J130 socket E.
(5) Connect negative (-) probe of multimeter
to relay K28 terminal 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, go to step 6
of this fault.

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.
4.

e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-754 Change 1

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Faulty dashboard cable
assembly.
Faulty relay K28.

NO

Repair wire 1955 from relay K28
terminal 86 on PDP to terminal board
TB1 position 5 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

YES

5.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K28.

NO

Repair wire 3056 from K28 terminal 85
on PDP to terminal board TB2 position
22 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
( para 7-11).

YES

Replace relay K28
(para 7-9).

If continuity is not present,
wire 3056 is faulty.

If 12 VDC is not present, wire
1955 is faulty.

Is 12 VDC present at relay
K28 terminal 86 on PDP?

Is continuity present from
relay K28 terminal 85 on
PDP to ground?

WARNING

Change 1 2-755

TM 9-2320-365-20-1

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K28 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3056 from K28 terminal 85 on PDP to
terminal board TB2 position 22 (para 2-40)
or replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K28
(para 7-9).
(6) Install relay K28 in PDP.
(7) Install PDP cover (para 16-2).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K28 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1955
from relay K28 terminal 86 on PDP to
terminal board TB1 position 5 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

YES

e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-756 Change 1

CAUTION
Read CAUTION
on following page.
6.

Is continuity present from
relay K28 terminal 87 on
PDP to connector J51
pin 9?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Relay K28 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

Repair wire 489T from relay K28
terminal 87 on PDP to connector J51
pin 9 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
( para 7-11).

If continuity is not present,
wire 489T is faulty.

Change 1 2-757

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K28 terminal 87 on PDP.
(7) Connect negative (-) probe of multimeter
to connector J51 pin 9 and note reading
on multimeter.
(8) If continuity is not present, repair wire
489T from relay K28 terminal 87 on PDP
to connector J51 pin 9 (para 2-40) or
replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Install relay K28 in PDP.

e62. TRAILER MARKER/TAILLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-758 Change 1

CAUTION
Read CAUTION
on following page.
7.

Is continuity present from
connector P51 socket 9
to connector P53R
pin 2?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 489T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.

KNOWN INFO

Towing vehicle marker/taillights
OK.
Circuit breaker CB41 OK.
Trailer electrical system OK.
Dashboard cable assembly OK.
Relay K28 OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

Repair wire 489T from connector
P51 socket 9 to connector P53R
pin 2 (para 2-40) or replace rear
lights cable assembly (para 7-75).

YES

Replace intervehicular
24 VDC cable (para 7-79).

Change 1 2-759

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Disconnect connector P53R from
connector J53R.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 9.
(4) Connect negative (-) probe of multimeter
to connector P53R pin 2 and note reading
on multimeter.
(5) If continuity is not present, repair wire
489T from connector P51 socket 9 to
connector P53R pin 2 (para 2-40) or
replace rear lights cable assembly
(para 7-75).
(6) If continuity is present, replace
intervehicular 24 VDC (12 pin) cable
(para 7-79).
(7) Connect connector P53R to connector
J53R.
(8) Connect connector P51 to connector J51.
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Install PDP cover (para 16-2).

e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE

TM 9-2320-365-20-1

2-760 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB44 prior to beginning this task.

NOTE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)
References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.

Is 24 VDC present at
connector J130 socket J?

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

If 24 VDC is present, trailer
electrical system is faulty.

KNOWN INFO

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.

POSSIBLE PROBLEMS

Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K31.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Troubleshoot trailer electrical
system per trailer technical
manual.

NO

Go to step 2 of this fault.
YES

NOTE

Change 1 2-761

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Lift cover on connector J130 intervehicular
24 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector J130 socket J.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 2
of this fault.
(9) If 24 VDC is present, troubleshoot trailer
electrical system per trailer technical
manual.
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Position master power switch to
off (TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-762 Change 1

CAUTION
Read CAUTION
on following page.
2.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K31.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

Go to step 6 of this fault.
YES

WARNING
Read WARNING
on following page.
3.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

NO

Repair wire 1956 from K31 terminal 30
on PDP to circuit breaker CB44 terminal 6
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

If 24 VDC is not present,
wire 1956 is faulty.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 24 VDC present at relay
K31 terminal 30 on PDP?

Is continuity present from
connector J130 socket J to
relay K31 terminal 87?

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Faulty dashboard cable
assembly.
Faulty relay K31.

Change 1 2-763

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove relay K31 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J130 socket J.
(5) Connect negative (-) probe of multimeter
to relay K31 terminal 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, go to step 6
of this fault.

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K31 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 24 VDC is not present, repair wire 1956
from K31 terminal 30 on PDP to circuit
breaker CB44 terminal 6 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.
4.

YES

e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-764 Change 1

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Is 12 VDC present at relay
K31 terminal 86 on PDP?

If 12 VDC is not present, wire
460B is faulty.

Faulty dashboard cable
assembly.
Faulty relay K31.

NO

Repair wire 460B from relay K31
terminal 86 on PDP to connector J19
socket 3 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11).

YES

5.

Is continuity present from
relay K31 terminal 85 on
PDP to ground?

KNOWN INFO

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 3048 is faulty.

Faulty dashboard cable
assembly.
Faulty relay K31.

NO

Repair wire 3048 from K31
terminal 85 on PDP to terminal
board TB2 position 53 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
( para 7-11).

Replace relay K31
(para 7-9).

Change 1 2-765

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

CONTINUITY TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K31 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Apply brakes and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 460B
from relay K31 terminal 86 on PDP to
connector J19 socket 3 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Position master power switch to off
(TM 9-2320-365-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K31 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3048 from K31 terminal 85 on PDP to
terminal board TB2 position 53 (para 2-40)
or replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K31
(para 7-9).
(6) Install relay K31 in PDP.
(7) Install PDP cover (para 16-2).

e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-766 Change 1

CAUTION
Read CAUTION
on following page.
6.
KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION
Is continuity present from
relay K31 terminal 87 on
PDP to connector J51
pin 16?

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.
Relay K31 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

If continuity is not present,
wire 460T is faulty.

Repair wire 460T from relay K31
terminal 87 on PDP to connector J51
pin 16 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
( para 7-11).

YES

NO

Change 1 2-767

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K31 terminal 87 on PDP.
(7) Connect negative (-) probe of multimeter
to connector J51 pin 16 and note reading
on multimeter.
(8) If continuity is not present, repair wire
460T from relay K31 terminal 87 on PDP
to connector J51 pin 16 (para 2-40) or
replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Install relay K31 in PDP.

YES

e63. TRAILER RIGHT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-768 Change 1

CAUTION
Read CAUTION
on following page.
7.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Towing vehicle right stop/turn
light OK.
Circuit breaker CB44 OK.
Trailer electrical system OK.
Dashboard cable assembly OK.
Relay K31 OK.

Is continuity present from
connector P51 socket 16 to
connector P53R socket 5?
If continuity is not present,
wire 460T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

Repair wire 460T from connector P51
socket 16 to connector P53R socket 5
(para 2-40) or replace rear lights cable
assembly (para 7-75).

Replace intervehicular
24 VDC cable (para 7-79).

Change 1 2-769

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Disconnect connector P53R from
connector J53R.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 16.
(4) Connect negative (-) probe of multimeter
to connector P53R socket 5 and note
reading on multimeter.
(5) If continuity is not present, repair wire
460T from connector P51 socket 16
to connector P53R socket 5 (para 2-40)
or replace rear lights cable assembly
(para 7-75).
(6) If continuity is present, replace
intervehicular 24 VDC (12 pin) cable
(para 7-79).
(7) Connect connector P53R to connector
J53R.
(8) Connect connector P51 to connector J51.
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Install PDP cover (para 16-2).

1.
KNOWN INFO
TEST OPTIONS

NO

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

Troubleshoot trailer electrical
system per trailer technical
manual.

Go to step 2 of this fault.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.

Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K30.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Is 24 VDC present at
connector J130 socket B?

e64. TRAILER LEFT STOP/TURN LIGHT DOES NOT ILLUMINATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-770 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB43 prior to beginning this task.

START

NOTE

REASON FOR QUESTION

If 24 VDC is present, trailer
electrical system is faulty.

NOTE

Change 1 2-771

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Lift cover on connector J130 intervehicular
24 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector J130 socket B.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 2
of this fault.
(9) If 24 VDC is present, troubleshoot trailer
electrical system per trailer technical
manual.
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Position master power switch to
off (TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

KNOWN INFO
TEST OPTIONS

NO

TEST OPTIONS
KNOWN INFO

NO

YES

YES

WARNING
Read WARNING
on following page.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

POSSIBLE PROBLEMS

3.

2.

POSSIBLE PROBLEMS

Go to step 6 of this fault.

CAUTION
Read CAUTION
on following page.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Faulty dashboard cable
assembly.
Faulty relay K30.

Faulty dashboard cable
assembly.
Faulty relay K30.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Is 24 VDC present at
relay K30 terminal 30
on PDP?

Is continuity present from
connector J130 socket B
to relay K30 terminal 87?

Repair wire 1922 from K30 terminal 30 on PDP
to circuit breaker CB43 terminal 8 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

2-772 Change 1

This question eliminates
possible problems and
determines where
troubleshooting continues.

If 24 VDC is not present,
wire 1922 is faulty.

e64. TRAILER LEFT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

VOLTAGE TEST

CONTINUITY TEST

NOTE

(1) Remove PDP cover (para 16-2).
(2) Remove relay K30 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J130 socket B.
(5) Connect negative (-) probe of multimeter
to relay K30 terminal 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, go to step 6
of this fault.

Change 1 2-773

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K30 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 24 VDC is not present, repair wire 1922
from K30 terminal 30 on PDP to circuit
breaker CB43 terminal 8 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.
4.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Faulty dashboard cable
assembly.
Faulty relay K30.

Is 12 VDC present at relay
K30 terminal 86 on PDP?

e64. TRAILER LEFT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-774 Change 1

If 12 VDC is not present,
wire 461B is faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

POSSIBLE PROBLEMS

5.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Is continuity present from
relay K30 terminal 85 on
PDP to ground?

Faulty dashboard cable
assembly.
Faulty relay K30.

REASON FOR QUESTION

If continuity is not present,
wire 3047 is faulty.

YES

Replace relay K30
(para 7-9).

NO

Repair wire 3047 from K30 terminal
85 on PDP to terminal board TB2 position
50 (para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly ( para 7-11).

NO

Repair wire 461B from relay K30 terminal
86 on PDP to connector J19 socket 2
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K30 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Apply brakes and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 461B
from relay K30 terminal 86 on PDP to
connector J19 socket 2 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Position master power switch to off
(TM 9-2320-365-10).

Change 1 2-775

TM 9-2320-365-20-1

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K30 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3047 from K30 terminal 85 on PDP to
terminal board TB2 position 50 (para 2-40)
or replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K30
(para 7-9).
(6) Install relay K30 in PDP.
(7) Install PDP cover (para 16-2).

KNOWN INFO
TEST OPTIONS

NO

YES

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

6.

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.
Relay K30 OK.

Is continuity present from
relay K30 terminal 87 on
PDP to connector J51
pin 15?

e64. TRAILER LEFT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-776 Change 1

Repair wire 461T from relay K30
terminal 87 on PDP to connector J51
pin 15 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly ( para 7-11).

If continuity is not present,
wire 461T is faulty.

CONTINUITY TEST

NOTE

Change 1 2-777

TM 9-2320-365-20-1

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K30 terminal 87 on PDP.
(7) Connect negative (-) probe of multimeter
to connector J51 pin 15 and note reading
on multimeter.
(8) If continuity is not present, repair wire
461T from relay K30 terminal 87 on PDP
to connector J51 pin 15 (para 2-40) or
replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Install relay K30 in PDP.

KNOWN INFO
7.
TEST OPTIONS

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Replace intervehicular
24 VDC cable (para 7-79).

e64. TRAILER LEFT STOP/TURN LIGHT DOES NOT ILLUMINATE (CONT)

Is continuity present from
connector P51 socket 15
to connector P53R
pin 8?

TM 9-2320-365-20-1

2-778 Change 1

Towing vehicle left stop/turn
light OK.
Circuit breaker CB43 OK.
Trailer electrical system OK.
Dashboard cable assembly OK.
Relay K30 OK.

If continuity is not present,
wire 461T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.

Repair wire 461T from connector P51
socket 15 to connector P53R pin 8
(para 2-40) or replace rear lights
cable assembly (para 7-75).

YES

NO

CONTINUITY TEST

Change 1 2-779

TM 9-2320-365-20-1

(1) Disconnect connector P53R from
connector J53R.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 15.
(4) Connect negative (-) probe of multimeter
to connector P53R pin 8 and note
reading on multimeter.
(5) If continuity is not present, repair wire
461T from connector P51 socket 15
to connector P53R pin 8 (para 2-40)
or replace rear lights cable assembly
(para 7-75).
(6) If continuity is present, replace
intervehicular 24 VDC (12 pin) cable
(para 7-79).
(7) Connect connector P53R to connector
J53R.
(8) Connect connector P51 to connector J51.
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Install PDP cover (para 16-2).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

KNOWN INFO
TEST OPTIONS

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K29.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Towing vehicle blackout marker
lights OK.
Circuit breaker CB42 OK.

e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE

TM 9-2320-365-20-1

2-780 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB42 prior to beginning this task.

START

NOTE

REASON FOR QUESTION

If 24 VDC is present, trailer
electrical system is faulty.

NO

Go to step 2 of this fault.
YES

Troubleshoot trailer electrical
system per trailer technical
manual.

POSSIBLE PROBLEMS

1.

Is 24 VDC present at
connector J130 sockets A,
C, and H?

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P

NOTE

Change 1 2-781

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Lift cover on connector J130 intervehicular
24 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J130 socket A.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(7) Connect positive (+) probe of multimeter
to connector J130 socket C.
(8) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(9) Connect positive (+) probe of multimeter
to connector J130 socket H.
(10) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(11) If 24 VDC is not present, go to step 2
of this fault.
(12) If 24 VDC is present, troubleshoot
trailer electrical system per trailer
technical manual.
(13) Position main light switch to OFF
(TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

TEST OPTIONS
KNOWN INFO

NO

YES

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

3.

POSSIBLE PROBLEMS

Is 24 VDC present at
relay K29 terminal 30
on PDP?

Faulty dashboard cable
assembly.
Faulty relay K29.

Towing vehicle blackout marker
lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-782 Change 1

If 24 VDC is not present,
wire 1958 is faulty.

Repair wire 1958 from K29 terminal 30 on
PDP to circuit breaker CB42 terminal 4 (para
2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

2.

CAUTION
Read CAUTION
on following page.

Faulty dashboard cable
assembly.
Faulty relay K29.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Towing vehicle blackout marker
lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
This question eliminates
possible problems and
determines where
troubleshooting continues.

Is continuity present from
connector J130 sockets A,
C, and H to relay K29
terminal 87?

YES
Go to step 6 of this fault.

NO

CONTINUITY TEST

NOTE

Change 1 2-783

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K29 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 24 VDC is not present, repair wire 1958
from K29 terminal 30 on PDP to circuit
breaker CB42 terminal 4 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove relay K29 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J130 sockets A, C, and H,
one at a time.
(5) Connect negative (-) probe of multimeter
to relay K29 terminal 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, go to step 6
of this fault.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

YES

WARNING
Read WARNING
on following page.
4.

e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-784 Change 1

If 12 VDC is not present,
wire 1408 is faulty.

Is 12 VDC present at relay
K29 terminal 86 on PDP?

Repair wire 1408 from relay K29 terminal
86 on PDP to terminal board TB1 position
53 (para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Towing vehicle blackout
marker lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

Faulty dashboard cable
assembly.
Faulty relay K29.

NO

KNOWN INFO

Towing vehicle blackout
marker lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K29.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,
wire 3040 is faulty.

5.

Is continuity present from
relay K29 terminal 85 on
PDP to ground?

NO

Repair wire 3040 from K29 terminal
85 on PDP to terminal board TB2
position 20 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10) or
WTEC III dashboard cable assembly
(para 7-11).

YES

Replace relay K29
(para 7-9).

VOLTAGE TEST

Change 1 2-785

TM 9-2320-365-20-1

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K29 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 VDC is not present, repair wire 1408
from relay K29 terminal 86 on PDP to
terminal board TB1 position 53 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K29 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3040 from K29 terminal 85 on PDP to
terminal board TB2 position 20 (para 2-40)
or replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K29
(para 7-9).
(6) Install relay K29 in PDP.
(7) Install PDP cover (para 16-2).

KNOWN INFO
TEST OPTIONS

NO

YES

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

6.

Is continuity present from
relay K29 terminal 87 on
PDP to connector J51
pin 10?

e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-786 Change 1

If continuity is not present,
wire 484T is faulty.

POSSIBLE PROBLEMS

Towing vehicle blackout
marker lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
Relay K29 OK.

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Repair wire 484T from relay K29
terminal 87 on PDP to connector
J51 pin 10 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly ( para 7-11).

CONTINUITY TEST

NOTE

Change 1 2-787

TM 9-2320-365-20-1

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K29 terminal 87 on PDP.
(7) Connect negative (-) probe of multimeter
to connector J51 pin 10 and note reading
on multimeter.
(8) If continuity is not present, repair wire
484T from relay K29 terminal 87 on PDP
to connector J51 pin 10 (para 2-40) or
replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Install relay K29 in PDP.

KNOWN INFO
7.
TEST OPTIONS

CAUTION
Read CAUTION
on following page.

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

e65. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

Replace intervehicular
24 VDC cable (para 7-79).

TM 9-2320-365-20-1

2-788 Change 1

Towing vehicle blackout
marker lights OK.
Circuit breaker CB42 OK.
Trailer electrical system OK.
Dashboard cable assembly OK.
Relay K29 OK.

Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Is continuity present from
connector P51 socket 10
to connector P53R
sockets 7 and 9 and pin 10?

If continuity is not present,
wire 484T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.

YES

Repair wire 484T from connector P51
socket 10 to connector P53R socket 7
or 9 or pin 10 (para 2-40) or replace
rear lights cable assembly (para 7-75).

NO

CAUTION

Change 1 2-789

TM 9-2320-365-20-1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Disconnect connector P53R from
connector J53R.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 10.
(4) Connect negative (-) probe of multimeter
to connector P53R sockets 7 and 9 and
pin 10, one at a time, and note reading
on multimeter.
(5) If continuity is not present, repair wire
484T from connector P51 socket 10
to connector P53R socket 7 or 9 or pin
10 (para 2-40) or replace rear lights
cable assembly (para 7-75).
(6) If continuity is present, replace
intervehicular 24 VDC (12 pin) cable
(para 7-79).
(7) Connect connector P53R to connector
J53R.
(8) Connect connector P51 to connector J51.
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Install PDP cover (para 16-2).

1.
KNOWN INFO
TEST OPTIONS

NO

YES

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.

Voltage Test or
STE/ICE-R Test #89

Troubleshoot trailer electrical
system per trailer technical
manual.

Go to step 2 of this fault.

e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-790 Change 1

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB39 prior to beginning this task.

START

NOTE

REASON FOR QUESTION
Is 24 VDC present at
connector J130 socket F?

Faulty trailer electrical system.
Faulty dashboard cable
assembly.
Faulty relay K27.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

POSSIBLE PROBLEMS

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.

If 24 VDC is present, trailer
electrical system is faulty.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Material/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

NOTE

Change 1 2-791

TM 9-2320-365-20-1

VOLTAGE TEST

(1) Lift cover on connector J130 intervehicular
24 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J130 socket F.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to BO DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 24 VDC is not present, go to step 2
of this fault.
(9) If 24 VDC is present, troubleshoot trailer
electrical system per trailer technical
manual.
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Position master power switch to
off (TM 9-2320-365-10).

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-792 Change 1

KNOWN INFO
TEST OPTIONS

NO

YES

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

2.

Go to step 6 of this fault.

CAUTION
Read CAUTION
on following page.

Is continuity present from
connector J130 socket F
to relay K27 terminal 87?
This question eliminates
possible problems and
determines where
troubleshooting continues.

TEST OPTIONS
KNOWN INFO

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

3.

POSSIBLE PROBLEMS

Is 24 VDC present at
relay K27 terminal 30
on PDP?

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

REASON FOR QUESTION

If 24 VDC is not present,
wire 1959 is faulty.

NO

Repair wire 1959 from K27 terminal 30 on
PDP to circuit breaker CB39 terminal 4
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

YES

Faulty dashboard cable
assembly.
Faulty relay K27.

POSSIBLE PROBLEMS

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.

Faulty dashboard cable
assembly.
Faulty relay K27.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

CAUTION

Change 1 2-793

TM 9-2320-365-20-1

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove PDP cover (para 16-2).
(2) Remove relay K27 from PDP.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter
to connector J130 socket F.
(5) Connect negative (-) probe of multimeter
to relay K27 terminal 87 on PDP and note
reading on multimeter.
(6) If continuity is not present, go to step 6
of this fault.

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K27 terminal 30 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position main light switch to BO DRIVE
(TM 9-2320-365-10) and note reading
on multimeter.
(5) If 24 VDC is not present, repair wire 1959
from K27 terminal 30 on PDP to circuit
breaker CB39 terminal 4 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position main light switch to OFF
(TM 9-2320-365-10).

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

Voltage Test or
STE/ICE-R Test #89

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.
4.

Faulty dashboard cable
assembly.
Faulty relay K27.

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-794 Change 1

Is 12 VDC present at relay
K27 terminal 86 on PDP?

If 12 VDC is not present, wire
23 is faulty.

NO

Repair wire 23 from relay K27
terminal 86 on PDP to connector
PX15 socket N (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

YES

Replace relay K27
(para 7-9).

YES

If continuity is not present,
wire 3044 is faulty.

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Repair wire 3044 from K27 terminal 85
on PDP to terminal board TB2 position
34 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
( para 7-11).

NO

Is continuity present from
relay K27 terminal 85 on
PDP to ground?

5.
KNOWN INFO

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Rear lights cable assembly OK.
Rear intervehicular 24 VDC
(12 pin) cable OK.

POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty relay K27.

Change 1 2-795

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter
to relay K27 terminal 86 on PDP.
(3) Connect negative (-) probe of multimeter
to ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position main light switch to BO DRIVE
(TM 9-2320-365-10).
(6) Apply brakes and note reading on
multimeter.
(7) If 12 VDC is not present, repair wire 23
from relay K27 terminal 86 on PDP to
connector PX15 socket N (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Position master power switch to off
(TM 9-2320-365-10).

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K27 terminal 85 on PDP.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire
3044 from K27 terminal 85 on PDP to
terminal board TB2 position 34 (para 2-40)
or replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(5) If continuity is present, replace relay K27
(para 7-9).
(6) Install relay K27 in PDP.
(7) Install PDP cover (para 16-2).

e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-796 Change 1

CAUTION
Read CAUTION
on following page.
6.
TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Relay K27 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

Is continuity present from
relay K27 terminal 87 on
PDP to connector J51
pin 8?

If continuity is not present,
wire 23T is faulty.

NO

YES

Repair wire 23T from relay K27
terminal 87 on PDP to connector J51
pin 8 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly ( para 7-11).

Change 1 2-797

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Remove three screws and washers from
PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J51 from connector
P51.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter
to relay K27 terminal 87 on PDP.
(7) Connect negative (-) probe of multimeter
to connector J51 pin 8 and note reading
on multimeter.
(8) If continuity is not present, repair wire
23T from relay K27 terminal 87 on PDP
to connector J51 pin 8 (para 2-40) or
replace WTEC II dashboard assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(9) Install relay K27 in PDP.

e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-798 Change 1

CAUTION
Read CAUTION
on following page.
7.

Is continuity present from
connector P51 socket 8
to connector P53R
socket 6?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Dashboard cable assembly OK.
Relay K27 OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.

NO

YES

Replace intervehicular
24 VDC cable (para 7-79).

Repair wire 23T from connector P51
socket 8 to connector P53R socket 6
(para 2-40) or replace rear lights
cable assembly (para 7-75).

If continuity is not present,
wire 23T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.

Change 1 2-799

TM 9-2320-365-20-1

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CONTINUITY TEST

(1) Disconnect connector P53R from
connector J53R.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter
to connector P51 socket 8.
(4) Connect negative (-) probe of multimeter
to connector P53R socket 6 and note
reading on multimeter.
(5) If continuity is not present, repair wire
23T from connector P51 socket 8
to connector P53R socket 6 (para 2-40)
or replace rear lights cable assembly
(para 7-75).
(6) If continuity is present, replace
intervehicular 24 VDC (12 pin) cable
(para 7-79).
(7) Connect connector P53R to connector
J53R.
(8) Connect connector P51 to connector J51.
(9) Install PDP on dashboard with three
screws.
(10) Install three washers and screws in PDP.
(11) Install PDP cover (para 16-2).

TM 9-2320-365-20-1

2-800

e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Ties, Cable, Plastic (Item 76, Appendix D)

KNOWN INFO

Towing vehicle clearance lights
operate.

POSSIBLE PROBLEMS

Faulty towed vehicle.
Faulty rear lights cable
assembly.
Faulty rear intervehicular 12
VDC (7 pin) cable.

1.

Is 12 vdc present at
connector J95-2?

WARNING
Read WARNING
on following page.

START

Go to step 2 of this fault.
YES

NO

Perform Electrical System Troubleshooting (e47.
Side and/or Rear Marker Lights Do Not Illuminate)
if towed vehicle is FMTV. If not an FMTV vehicle, refer
to towed vehicle TM for troubleshooting procedures.

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-801
2-801
2-801
2-801
2-801

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Raise cover on connector J95 intervehicular 12
vdc connector.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J95-2.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, go to step 2 of this
fault.
(7) If 12 vdc is present, perform Electrical System
Troubleshooting (e47. Side and/or Rear Marker
Lights Do Not Illuminate) if towed vehicle is
FMTV. If towed vehicle is not an FMTV, refer
to towed vehicle TM for troubleshooting
procedures.
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-802
2-802
2-802
2-802
2-802

e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE (CONT)
e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE (CONT)
e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE (CONT)
e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE (CONT)
e67. INTERVEHICLE CLEARANCE LIGHTS DO NOT OPERATE (CONT)

YES

NO

KNOWN INFO
TEST OPTIONS
Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
Towing vehicle clearance
lights operate.
Towed vehicle clearance
lights OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 vdc (7 pin) cable.

2.

Is 12 vdc present at
connector P52R-3?
If 12 vdc is not present,
wire 489 is faulty. If 12
vdc is present, rear
intervehicular (7 pin) 12
vdc cable is faulty.

Repair wire 489 (para 2-40)
or replace rear lights cable
assembly (para 7-75).

Replace rear intervehicular 12
vdc (7 pin) cable (para 7-78).

TM 9-2320-365-20-1

2-803

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

Remove plastic cable ties as required.

(1) Disconnect connector P52R from connector
J52.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter
to connector P52R-3.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 489
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) If 12 vdc is present, replace rear
intervehicular 12 VDC (7 pin) cable
(para 7-78).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

Install plastic cable ties as required.

(9) Connect connector P52R to connector J52.

NOTE

WARNING

NOTE

e68. INTERVEHICLE LEFT TURN SIGNAL DOES NOT ILLUMINATE

TM 9-2320-365-20-1

2-804 Change 1

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Ties, Cable, Plastic (Item 76, Appendix D)

Personnel Required
(2)
References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

KNOWN INFO

YES

NO

Perform Electrical System Troubleshooting
e55. Rear Hazard Lights Do Not Illuminate,
if towed vehicle is FMTV. If towed vehicle is
not FMTV, refer to vehicle TM for
troubleshooting procedures.

Go to step 2 of this fault.

Is 12 VDC pulse present at
connector J95 pin 3?

Towing vehicle left turn signal
illuminates.

POSSIBLE PROBLEMS

Faulty towed vehicle.
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

If 12 VDC pulse is present,
towed vehicle is faulty.

Change 1 2-805

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Lift cover on connector J95 intervehicular
12 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J95 pin 3.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position turn signal switch to left turn
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC pulse is not present, go to
step 2 of this fault.
(8) If 24 VDC pulse is present, perform
Electrical System Troubleshooting e55.
Rear Hazard Lights Do Not Illuminate,
if towed vehicle is FMTV. If towed
vehicle is not FMTV, refer to towed
vehicle TM for troubleshooting procedures.
(9) Position turn signal switch to off
(TM 9-2320-365-10).
(10 ) Position main light switch to OFF
(TM 9-2320-365-10).

e68. INTERVEHICLE LEFT TURN SIGNAL DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-806 Change 1

WARNING

2.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

CAUTION

Read WARNING and
CAUTION on
following page.

POSSIBLE PROBLEMS

Towing vehicle left turn signal
illuminates.
Towed vehicle left turn signal
OK.

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC pulse present at
connector J51 pin 12?

If 12 VDC pulse is not present,
wire 461B is faulty.

NO

Repair wire 461B from connector J51
pin 12 to splice E3 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

YES

WARNING

Change 1 2-807

TM 9-2320-365-20-1

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J51 from connector
P51.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector J51 pin 12.
(8) Connect negative (-) probe of multimeter
to ground.
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(10) Position turn signal switch to left turn
(TM 9-2320-365-10) and note reading
on multimeter.
(11) If 12 VDC pulse is not present, repair
wire 461B from connector J51 pin 12
to splice E3.
(12) Position main light switch to OFF
(TM 9-2320-365-10).
(13) Position turn signal switch to off
(TM 9-2320-365-10).
(14) Connect connector J51 to connector P51.
(15) Install PDP on dashboard with three
screws.

(16) Install three washers and screws in PDP.
(17) Install PDP cover (para 16-2).

e68. INTERVEHICLE LEFT TURN SIGNAL DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-808 Change 1

3.

WARNING

KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

CAUTION

Read WARNING and
CAUTION on
following page.

Is 12 VDC pulse present at
connector P52R pin 5?

Replace rear intervehicular 12 VDC
(7 pin) cable (para 7-78).

POSSIBLE PROBLEMS

Towing vehicle left turn signal
illuminates.
Towed vehicle left turn signal
OK.
Dashboard cable assembly OK.

Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

If 12 VDC pulse is not present,
wire 461B is faulty. If 12 VDC
pulse is present, rear
intervehicular 12 VDC (7 pin)
cable is faulty.

NO

Repair wire 461B from connector
P51 socket 12 to connector P52R
pin 5 (para 2-40) or replace rear lights
cable assembly (para 7-75).

YES

Change 1 2-809

TM 9-2320-365-20-1

Install plastic cable ties as required.

(10) Position main light switch to OFF
(TM 9-2320-365-10).

(11) Connect connector P52R to connector
J52.

NOTE

VOLTAGE TEST (Cont)
WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

NOTE

(1) Disconnect connector P52R from
connector J52.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P52R pin 5.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position turn signal switch to left turn
(TM 9-2320-365-10).
(7) If 12 VDC pulse is not present, repair
wire 461B from connector P51 socket
12 to connector P52R pin 5 (para 2-40)
or replace rear lights cable assembly
(para 7-75).
(8) If 12 VDC pulse is present, replace rear
intervehicular 12 VDC (7 pin) cable
(para 7-78).
(9) Position turn signal switch to off
(TM 9-2320-365-10).

Remove plastic cable ties as required.

e69. INTERVEHICLE RIGHT TURN SIGNAL DOES NOT ILLUMINATE

TM 9-2320-365-20-1

2-810 Change 1

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Ties, Cable, Plastic (Item 76, Appendix D)

Personnel Required
(2)
References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

Towing vehicle right turn signal
illuminates.

POSSIBLE PROBLEMS

Faulty towed vehicle.
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC pulse present at
connector J95 pin 5?

If 12 VDC pulse is present,
towed vehicle is faulty.

NO

Go to step 2 of this fault.
YES

Perform Electrical System Troubleshooting
e55. Rear Hazard Lights Do Not Illuminate,
if towed vehicle is FMTV. If towed vehicle is
not FMTV, refer to towed vehicle TM for
troubleshooting procedures.

Change 1 2-811

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Lift cover on connector J95 intervehicular
12 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J95 pin 5.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position turn signal switch to right turn
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 VDC pulse is not present, go to
step 2 of this fault.
(8) If 24 VDC pulse is present, perform
Electrical System Troubleshooting e55.
Rear Hazard Lights Do Not Illuminate,
if towed vehicle is FMTV. If towed
vehicle is not FMTV, refer to towed
vehicle TM for troubleshooting
procedures.
(9) Position turn signal switch to off
(TM 9-2320-365-10).
(10 ) Position main light switch to OFF
(TM 9-2320-365-10).

e69. INTERVEHICLE RIGHT TURN SIGNAL DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-812 Change 1

WARNING

2.

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION
Is 12 VDC pulse present at
connector J51 pin 11?

Towing vehicle right turn signal
illuminates.
Towed vehicle right turn signal
OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

If 12 VDC pulse is not present,
wire 460B is faulty.

NO

Repair wire 460B from connector J51
pin 11 to splice E4 (para 2-40) or replace
WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

YES

Change 1 2-813

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J51 from
connector P51.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector J51 pin 11.
(8) Connect negative (-) probe of multimeter
to ground.
(9) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(10) Position turn signal switch to right turn
(TM 9-2320-365-10) and note reading
on multimeter.
(11) If 12 VDC pulse is not present, repair
wire 460B from connector J51 pin 11
to splice E4.
(12) Position main light switch to OFF
(TM 9-2320-365-10).
(13) Position turn signal switch to off
(TM 9-2320-365-10).
(14) Connect connector J51 to connector
P51.
(15) Install PDP on dashboard with three
screws.

(16) Install three washers and screws in PDP.
(17) Install PDP cover (para 16-2).

e69. INTERVEHICLE RIGHT TURN SIGNAL DOES NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-814 Change 1

3.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

Replace rear intervehicular 12 VDC
(7 pin) cable (para 7-78).

POSSIBLE PROBLEMS

Towing vehicle right turn signal
illuminates.
Towed vehicle right turn signal
OK.
Dashboard calble assembly OK.

Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC pulse present at
connector P52R pin 7?

If 12 VDC pulse is not present,
wire 460B is faulty. If 12 VDC
pulse is present, rear
intervehicular 12 VDC (7 pin)
cable is faulty.

NO

Repair wire 460B from connector
P51 socket 11 to connector P52R
pin 7 (para 2-40) or replace rear
lights cable assembly (para 7-75).

YES

Change 1 2-815

TM 9-2320-365-20-1

NOTE
Install plastic cable ties as required.

(10) Position main light switch to OFF
(TM 9-2320-365-10).

(11) Connect connector P52R to connector
J52.

VOLTAGE TEST (Cont)

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Disconnect connector P52R from
connector J52.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P52R pin 7.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(6) Position turn signal switch to right turn
(TM 9-2320-365-10).
(7) If 12 VDC pulse is not present, repair
wire 460B from connector P51 socket
11 to connector P52R pin 7 (para 2-40)
or replace rear lights cable assembly
(para 7-75).
(8) If 12 VDC pulse is present, replace rear
intervehicular 12 VDC (7 pin) cable
(para 7-78).
(9) Position turn signal switch to off
(TM 9-2320-365-10).

NOTE
Remove plastic cable ties as required.

e70. INTERVEHICLE STOPLIGHTS DO NOT ILLUMINATE

TM 9-2320-365-20-1

2-816 Change 1

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 46, Appendix C)
STE/ICE-R (Item 41, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Material/Parts
Ties, Cable, Plastic (Item 69, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

START

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
1.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

POSSIBLE PROBLEMS

Towing vehicle stoplights
illuminate.

Faulty towed vehicle.
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC present at
connector J95 pin 4?

If 12 VDC is present, towed
vehicle is faulty.

NO

Go to step 2 of this fault.
YES

Perform Electrical System Troubleshooting
e59. One or Both Stoplights Do Not Illuminate,
if towed vehicle is FMTV. If towed vehicle is
not FMTV, refer to towed vehicle TM for
troubleshooting procedures.

Change 1 2-817

TM 9-2320-365-20-1

(1) Lift cover on connector J95 intervehicular
12 VDC connector.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector J95 pin 4.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 12 VDC is not present, go to step 2 of
this fault.
(9) If 24 VDC is present, perform Electrical
System Troubleshooting e59. One or
Both Stoplights Do Not Illuminate, if towed
vehicle is FMTV. If towed vehicle is not
FMTV, refer to towed vehicle TM for
troubleshooting procedures.
(10) Position main light switch to OFF
(TM 9-2320-365-10).
(11) Position master power switch to off
(TM 9-2320-365-10).

VOLTAGE TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

YES

e70. INTERVEHICLE STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-818 Change 1

2.

WARNING

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

Towing vehicle stoplights
illuminate.
Towed vehicle stoplights OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC present at
connector J51 pin 13?

If 12 VDC is not present, wire
22C is faulty.

Repair wire 22C from connector J51pin 13
to terminal board TB1 position 31 (para 2-40)
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).

NO

VOLTAGE TEST

NOTE

Change 1 2-819

TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from
PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J51 from
connector P51.
(6) Set multimeter to volts DC.
(7) Connect positive (+) probe of multimeter
to connector J51 pin 13.
(8) Connect negative (-) probe of multimeter
to ground.
(9) Position master power switch to on
(TM 9-2320-365-10).
(10) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(11) Apply brakes and note reading on
multimeter.
(12) If 12 VDC is not present, repair wire 22C
from connector J51 pin 13 to terminal
board TB1 position 31.
(13) Position main light switch to OFF
(TM 9-2320-365-10).
(14) Position master power switch to off
(TM 9-2320-365-10).
(15) Connect connector J51 to connector P51.
(16) Install PDP on dashboard with three
screws.

(17) Install three washers and screws in PDP.
(18) Install PDP cover (para 16-2).

e70. INTERVEHICLE STOPLIGHTS DO NOT ILLUMINATE (CONT)

TM 9-2320-365-20-1

2-820 Change 1

WARNING

3.

CAUTION

Read WARNING and
CAUTION on
following page.
KNOWN INFO
TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

Replace rear intervehicular 12 VDC
(7 pin) cable (para 7-78).

Towing vehicle stoplights
illuminate.
Towed vehicle stoplights OK.
Dashboard cable assembly OK.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 VDC (7 pin) cable.

Is 12 VDC present at
connector P52R pin 6?

If 12 VDC is not present, wire
22C is faulty. If 12 VDC is
present, rear intervehicular
12 VDC (7 pin) cable is faulty.

NO

Repair wire 22C from connector P51
socket 13 to connector P52R pin 6
(para 2-40) or replace rear lights cable
assembly (para 7-75).

YES

Change 1 2-821

TM 9-2320-365-20-1

Install plastic cable ties as required.
NOTE

VOLTAGE TEST (Cont)

(11) Position master power switch to off
(TM 9-2320-365-10).

(12) Connect connector P52R to connector
J52.

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

CAUTION

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

NOTE

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

VOLTAGE TEST

(1) Disconnect connector P52R from
connector J52.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to connector P52R pin 6.
(4) Connect negative (-) probe of multimeter
to ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(7) Apply brakes and note reading on
multimeter.
(8) If 12 VDC is not present, repair wire 22C
from connector P51 socket 13 to
connector P52R pin 6 (para 2-40) or
replace rear lights cable assembly
(para 7-75).
(9) If 12 VDC is present, replace rear
intervehicular 12 VDC (7 pin) cable
(para 7-78).
(10) Position main light switch to OFF
(TM 9-2320-365-10).

NOTE
Remove plastic cable ties as required.

TM 9-2320-365-20-1

e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Ties, Cable, Plastic (Item 76, Appendix D)

1.

Is 12 vdc present at
connector J95-6?

WARNING
Read WARNING
on following page.

START

Perform Electrical System Troubleshooting
(e48. One or Both Composite Lights Do Not Illuminate)
if towed vehicle is FMTV. If not an FMTV vehicle, refer
to towed vehicle TM for troubleshooting procedures.

YES
Go to step 2 of this fault.

NO

KNOWN INFO

Towing vehicle taillights
operate.

POSSIBLE PROBLEMS

Faulty towed vehicle.
Faulty rear lights cable
assembly.
Faulty rear intervehicular 12
VDC (7 pin) cable.

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

2-822

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-823
2-823
2-823
2-823
2-823

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Raise cover on connector J95 intervehicular 12
vdc connector.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J95-6.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, go to step 2 of this
fault.
(7) If 12 vdc is present, perform Electrical System
Troubleshooting (e48. One or Both Composite
Lights Do Not Illuminate) if towed vehicle is
FMTV. If towed vehicle is not an FMTV, refer
to towed vehicle TM for troubleshooting
procedures.
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-824
2-824
2-824
2-824
2-824

e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE (CONT)
e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE (CONT)
e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE (CONT)
e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE (CONT)
e71. INTERVEHICLE TAILLIGHTS DO NOT OPERATE (CONT)

YES

NO

KNOWN INFO
TEST OPTIONS
Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

POSSIBLE PROBLEMS

Faulty rear lights cable
assembly.
Faulty rear intervehicular
12 vdc (7 pin) cable.

2.
Towing vehicle taillights
operate.
Towed vehicle taillights
OK.

Is 12 vdc present at
connector P52R-1?
If 12 vdc is not present,
wire 21 is faulty. If 12
vdc is present, rear
intervehicular 12 vdc
(7 pin) cable is faulty.

Repair wire 21 (para 2-40)
or replace rear lights cable
assembly (para 7-75).

Replace rear intervehicular 12
vdc (7 pin) cable (para 7-78).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-825
2-825
2-825
2-825
2-825

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

VOLTAGE TEST
NOTE
Remove plastic cable ties as required.

NOTE
Install plastic cable ties as required.
(9) Connect connector P52R to connector J52.

(1) Disconnect connector P52R from connector
J52.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P52R-1.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position main light switch to SER DRIVE
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 12 vdc is not present, repair wire 21
(para 2-40) or replace rear lights cable
assembly (para 7-75).
(7) If 12 vdc is present, replace rear intervehicular
12 vdc (7 pin) cable (para 7-78).
(8) Position main light switch to OFF
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-826
2-826
2-826
2-826
2-826

YES

NO

START

1.
Circuit breaker OK.
Main instrument panel
illuminates.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty lamps.
Faulty dashboard cable
assembly.
Faulty personnel heater.

Is continuity present
through lamps?
If continuity is not present,
lamps are faulty.

e72. PERSONNEL HEATER CONTROL ILLUMINATION DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Replace lamps
(para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-827
2-827
2-827
2-827
2-827

CONTINUITY TEST

(1) Remove lamps from heater (para 18-9).
(2) Set multimeter to ohms.
(3) Check continuity through each lamp.
(4) If continuity is not present, replace lamp(s)
(para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-828
2-828
2-828
2-828
2-828

2.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 12 vdc present at power
contacts of heater control
lamp sockets?

NO

YES

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty personnel heater.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 4 of this fault.

NO

YES

3.

Is continuity present
between connector PX25-3
and a known good ground?

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty personnel heater.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not
present, wire 3003 is
faulty. If continuity is
present, personnel
heater is faulty.

Circuit breaker OK.
Main instrument panel
illuminates.
Lamps OK.

Circuit breaker OK.
Main instrument panel
illuminates.
Lamps OK.

Repair wire 3003 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace or repair
personnel heater
(para 18-9).

e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-829
2-829
2-829
2-829
2-829

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
power contact of each heater control lamp
socket.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position main light switch to SER DRIVE
(TM 9-2320-365-10).
(5) Position main light switch auxiliary lever
to PANEL BRT (TM 9-2320-365-10).
(6) Position dimmer switch to maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(7) If 12 vdc is not present, go to step 4 of
this fault.
(8) Position main light switch to OFF
(TM 9-2320-365-10).
(9) Position main light switch auxiliary lever
to OFF (TM 9-2320-365-10).
(10) Install lamps in heater (para 18-9).

(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector PX25 from personnel
heater connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX25-3.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If continuity is not present, repair wire 3003
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) If continuity is present, replace or repair personnel
heater (para 18-9).
(8) Connect connector PX25 to personnel heater
connector.
(9) Install personnel heater (para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-830
2-830
2-830
2-830
2-830

YES

NO

4.

Is 12 vdc present at
connector PX25-2?

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty personnel heater.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
If 24 vdc is not present,
wire 1908 is faulty. If
24 vdc is present,
personnel heater is faulty.

Circuit breaker OK.
Main instrument panel
illuminates.
Lamps OK.

Repair wire 1908 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace or repair
personnel heater
(para 18-9).

e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)
e72. PERSONNEL HEATER ILLUMINATION DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-831
2-831
2-831
2-831
2-831

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST
(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector PX25 from personnel
heater connector.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector PX25-1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position main light switch auxiliary lever to
PNL BRT (TM 9-2320-365-10).
(8) Position dimmer switch to maximum
brightness (TM 9-2320-365-10) and note
reading on multimeter.
(9) If 12 vdc is not present, repair wire 1908
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(10) If 12 vdc is present, replace or repair personnel
heater (para 18-9).
(11) Position master power switch to off
(TM 9-2320-365-10).
(12) Position main light switch auxiliary lever to
OFF (TM 9-2320-365-10).
(13) Connect connector PX25 to personnel heater
connector.
(14) Install personnel heater (para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-832
2-832
2-832
2-832
2-832

1.

START

YES

NO

Circuit breaker OK.
Main instrument panel
controls and indicators OK.

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

Go to step 5 of this fault.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Is 24 vdc present at heater
fan control switch blue
wire?

Faulty heater fan control
switch.
Faulty personnel heater.
Faulty dashboard cable
assembly.

e73. PERSONNEL HEATER FAN DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-833
2-833
2-833
2-833
2-833

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove heater fan control switch
(para 18-10).
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
personnel heater fan control switch blue wire.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, go to step 5 of
this fault.
(7) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-834
2-834
2-834
2-834
2-834

e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)

YES

NO

2.

YES

NO

3.

Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Is continuity present
between heater fan control
switch orange wire and a
known good ground?

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is continuity present
between heater fan control
switch terminals?
If continuity is not present,
heater fan control switch is
faulty. If continuity is
present, heater is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty heater fan control
switch.
Faulty personnel heater.
Faulty dashboard cable
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Go to step 4 of this fault.

KNOWN INFO

Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Dashboard cable
assembly OK.
POSSIBLE PROBLEMS
Faulty heater fan control
switch.
Faulty personnel heater.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace heater fan
control switch (para 18-10).

Replace or repair
personnel heater
(para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-835
2-835
2-835
2-835
2-835

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
heater fan control switch orange wire.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 4 of
this fault.

(1) Set multimeter to ohms.
(2) Position heater fan control switch to high
speed.
(3) Connect positive (+) probe of multimeter to
one heater fan control switch terminal.
(4) Connect negative (-) probe of multimeter to
other heater fan control switch terminal and
note reading on multimeter.
(5) If continuity is not present, replace heater fan
control switch (para 18-10).
(6) If continuity is present, replace or repair
personnel heater (para 18-9).
(7) Install heater fan control switch (para 18-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-836
2-836
2-836
2-836
2-836

e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)
e73. PERSONNEL HEATER FAN DOES NOT OPERATE (CONT)

NO

YES

4.

Is continuity present
between connector PX25-4
and a known good ground?

KNOWN INFO

Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Heater fan control
switch OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty personnel heater.

TEST OPTIONS

Continuity Test or
STE/ICE-R#91

REASON FOR QUESTION
If continuity is not present,
wire 3003 is faulty. If
continuity is present,
personnel heater is faulty.

NO

YES

5.

Is 24 vdc present at
connector PX25-1?

KNOWN INFO

Circuit breaker OK.
Main instrument panel
controls and indicators OK.
Heater fan control
switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty personnel heater.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
If 24 vdc is not present,
wire 1601 is faulty. If
24 vdc is present,
personnel heater is faulty.

Repair wire 3003 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace or repair
personnel heater
(para 18-9).

Repair wire 1601 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace or repair
personnel heater
(para 18-9).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-837
2-837
2-837
2-837
2-837

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

WARNING

(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector PX25 from personnel
heater connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX25-4.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If continuity is not present, repair wire 3003
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If continuity is present, replace or repair personnel
heater (para 18-9).
(8) Install personnel heater (para 18-9).
(9) Install heater fan control switch (para 18-10).

(1) Remove personnel heater for access (para 18-9).
(2) Disconnect connector PX25 from personnel
heater connector.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector PX25-2.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1601
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) If 24 vdc is present, replace or repair personnel
heater (para 18-9).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Install personnel heater (para 18-9).
(11) Install heater fan control switch (para 18-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-838
2-838
2-838
2-838
2-838

YES

NO

START

1.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Nothing.

Is 24 vdc present at
connector P125-2?

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 5 of this fault.

Faulty windshield washer
pump EMI cable.
Faulty windshield washer
pump.
Faulty front lights cable
assembly.
Faulty dashboard cable
assembly.
Faulty turn signal switch.

e74. WINDSHIELD WASHER DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-839
2-839
2-839
2-839
2-839

VOLTAGE TEST

(1) Open left cab step tread
(TM 9-2320-365-10).
(2) Disconnect connector P125 from windshield
washer pump connector.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P125-2.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Operate windshield washer
(TM 9-2320-365-10).
(7) If 24 vdc is not present, go to step 5 of this
fault.
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Connect connector P125 to windshield
washer pump connector.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-840
2-840
2-840
2-840
2-840

YES

NO

2.

3.

If continuity is not present,
wire 3038 is faulty.

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Dashboard cable
assembly OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Is continuity present
between connector P25-1
and terminal TL94?

Dashboard cable
assembly OK.
Turn signal switch OK.
Front lights cable
assembly OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty front lights cable
assembly.
Faulty windshield washer
pump.
Faulty windshield washer
pump EMI cable.

Faulty windshield washer
pump.
Faulty windshield washer
pump EMI cable.

Is continuity present
between two terminals
on windshield washer
pump?

If continuity is not present,
windshield washer pump
is faulty.

Repair wire 3038 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace windshield washer
pump (para 18-2).

e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-841
2-841
2-841
2-841
2-841

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector P25 from connector
J25.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J25-1.
(4) Connect negative (-) probe of multimeter to
terminal TL94.
(5) If continuity is not present, repair wire 3038
(para 2-40) or replace front lights cable
assembly (para 7-74).
(6) Connect connector P25 to connector J25.

(1) Disconnect connector P125 from windshield
washer pump connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal 1 of windshield washer pump
connector.
(4) Connect negative (-) probe of multimeter to
terminal 2 or windshield washer pump
connector.
(5) If continuity is not present, replace windshield
washer motorpump (para 18-2).
(6) Connect connector P125 to windshield washer
pump connector.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-842
2-842
2-842
2-842
2-842

KNOWN INFO
4.

Is continuity present
between connector P125-1
and connector P25-1?

TEST OPTIONS
Continuity Test
STE/ICE-R #91

REASON FOR QUESTION

Front lights cable
assembly OK.
Dashboard cable
assembly OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty windshield washer
pump EMI cable.
Faulty windshield washer
pump.

If continuity is not present,
windshield washer
pump EMI cableis faulty. If
continuity is present,
windshield washer pump
is faulty.
NO

YES

Replace windshield washer
pump EMI cable (para 7-60).

Replace windshield washer
pump (para 18-2).

e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-843
2-843
2-843
2-843
2-843

CONTINUITY TEST

(1) Disconnect connector P25 from connector
J25.
(2) Disconnect connector P125 from windshield
washer pump connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P25-1.
(5) Connect negative (-) probe of multimeter to
connector P125-1 and note reading on
multimeter.
(6) If continuity is not present, replace
windshield washer pump EMI cable
(para 7-60).
(7) If continuity is present, replace windshield
washer pump (para 18-2).
(8) Connect connector P25 to connector J25.
(9) Connect connector P125 to windshield
washer pump.
(10) Close left cab step tread
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-844
2-844
2-844
2-844
2-844

If 24 vdc is not present,
wire 1569 is faulty.

Is 24 vdc present at
connector P18-4?

NO

YES

NO

YES

Is continuity present
between turn signal
switch connector
terminal 4 and terminal 8?

If continuity is not present,
turn signal switch is faulty.

6.

5.
KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Windshield washer
pump OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty turn signal switch.
Faulty front lights cable
assembly.
Faulty windshield washer
pump EMI cable.

KNOWN INFO

Windshield washer
pump OK.
POSSIBLE PROBLEMS
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield washer
pump EMI cable.

Repair wire 1569 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace turn signal
switch (para 7-25).

e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-845
2-845
2-845
2-845
2-845

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

CONTINUITY TEST

VOLTAGE TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector P18 from turn signal
switch connector.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P18-4.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Press windshield washer switch
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1569
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 4.
(3) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 8.
(4) Press windshield washer switch
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If continuity is not present, replace turn
signal switch (para 7-25).
(6) Connect connector P18 to turn signal switch
connector.
(7) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-846
2-846
2-846
2-846
2-846

NO

YES

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

7.

Is 24 vdc present at
connector J27-4?
If 24 vdc is not present,
wire 1424 is faulty.

Windshield washer
pump OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty windshield washer
pump EMI cable.
Repair wire 1424 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-847
2-847
2-847
2-847
2-847

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector J27 from connector P27.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector J27-4.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position master power switch to on
(TM 9-2320-365-10).
(10) Press windshield washer switch
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If 24 vdc is not present, repair wire 1424
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(12) Position master power switch to off
(TM 9-2320-365-10).
(13) Connect connector J27 to connector P27.
(14) Install PDP on dashboard with three screws.
(15) Install three washers and screws in PDP.
(16) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-848
2-848
2-848
2-848
2-848

NO

YES

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

8.

Is 24 vdc present at
connector P25-2?

Windshield washer
pump OK.
Turn signal switch OK.
Dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.
Faulty windshield washer
pump EMI cable.

If 24 vdc is not present,
wire 1424 in front lights
cable assembly is faulty.
If 24 vdc is present,
windshield washer
pump EMI cable is faulty.

Repair wire 1424 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace windshield washer
pump EMI cable (para 7-60).

e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)
e74. WINDSHIELD WASHER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-849
2-849
2-849
2-849
2-849

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Disconnect connector P25 from connector J25.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P25-2.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Press windshield washer switch
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1424
(para 2-40) or replace front lights cable
assembly (para 7-74).
(8) If 24 vdc is present, replace windshield washer
pump EMI cable (para 7-60).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector P25 to connector J25.
(11) Close left cab step tread (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-850
2-850
2-850
2-850
2-850

1.

START

YES

NO

Windshield washer
operates.
Horn operates.
Windshield wiper
operates on high speed.
Windshield wiper operates
on intermittent speed.

This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Go to step 3 of this fault.

Voltage Test or
STE/ICE-R #89

WARNING
Read WARNING
on following page.

Is 24 vdc present on
connector PX22-5?

Faulty windshield wiper
motor.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.
Faulty windshield wiper
ECU.

e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-851
2-851
2-851
2-851
2-851

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector PX22 from windshield
wiper motor.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector PX22-5.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position master power switch to on
(TM 9-2320-365-10).
(10) Position windshield wiper switch to low
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If 24 vdc is not present, go to step 3 of this
fault.
(12) Position windshield wiper switch to off
(TM 9-2320-365-10).
(13) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-852
2-852
2-852
2-852
2-852

2.
Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.

Is 24 vdc present on
connector PX22-2?
If 24 vdc is present,
windshield wiper motor
is faulty.

YES

NO

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Go to step 5 of this fault.

YES

NO

3.
Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.

Faulty windshield wiper
motor.
Faulty dashboard cable
assembly
Faulty windshield wiper
EMI cable.
Faulty windshield wiper
ECU.

Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

Is continuity present
between turn signal
switch connector
terminals 4 and 5?

Replace windshield wiper
motor (para 18-4).

Replace turn signal
switch (para 7-25).

e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-853
2-853
2-853
2-853
2-853

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

NOTE

24 vdc is indicated for approximately
1 (one) second.

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
connector PX22-2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10).

(5) Position windshield wiper switch to low
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, go to step 5 of
this fault.
(7) Position windshield wiper switch to off
(TM 9-2320-365-10).
(8) Position master power switch to off
(TM 9-2320-365-10).

(6) Position windshield wiper switch to low position
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace turn
signal switch (para 7-25).
(8) Position windshield wiper switch to off
(TM 9-2320-365-10).
(9) Connect turn signal switch connector to
connector P18.
(10) Install instrument panel assembly (para 7-15).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect turn signal switch connector from
connector P18.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 4.
(5) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 5.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-854
2-854
2-854
2-854
2-854

YES

NO

4.

Is 24 vdc present on
connector J2-5?

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.
Turn signal switch OK.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

YES

NO

5.

Is continuity present
between connector PX21-4
and a known good ground?
If continuity is not present,
wire 3034 is faulty.

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.
Windshield wiper motor OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

If 24 vdc is not present,
wire 1527 is faulty. If
24 vdc is present,
windshield wiper EMI
cable is faulty.

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.
Faulty windshield wiper
ECU.

Repair wire 1527 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield
wiper EMI cable
(para 7-61).

Repair wire 3034 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-855
2-855
2-855
2-855
2-855

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Disconnect connector J2 from connector P2.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J2-5.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position windshield wiper switch to low
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1527
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) If 24 vdc is present, replace windshield wiper
EMI cable (para 7-61).
(9) Position windshield wiper switch to off
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Connect connector J2 to connector P2.
(12) Install PDP on dashboard with three screws.
(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).

CONTINUITY TEST

(1) Disconnect windshield wiper ECU
from connector PX21.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX21-4.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3034
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-856
2-856
2-856
2-856
2-856

YES

NO

6.

7.

Is continuity present
between connector PX21-3
and connector J2-4?

YES

NO

If continuity is not present,
wire 1916 is faulty.

Is continuity present
between connector P2-4
and connector PX22-2?

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.
Windshield wiper motor OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on intermittent speed.
Windshield wiper motor OK.
Turn signal switch OK.
Dashboard cable
assembly OK.
POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.
Faulty windshield wiper
ECU.

Faulty windshield wiper
EMI cable.
Faulty windshield wiper
ECU.

If continuity is not present,
windshield wiper EMI cable
is faulty. If continuity is
present, windshield wiper
ECU is faulty.

Repair wire 1916 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield
wiper EMI cable
(para 7-61).

Replace windshield
wiper ECU (para 7-62).

e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)
e75. WINDSHIELD WIPER DOES NOT OPERATE ON LOW SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-857
2-857
2-857
2-857
2-857

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector J2 from connector P2.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J2-4.
(4) Connect negative (-) probe of multimeter to
connector PX21-3 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1916
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Connect windshield wiper ECU to
connector PX21.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P2-4.
(3) Connect negative (-) probe of multimeter to
connector PX22-2 and note reading on
multimeter.
(4) If continuity is not present, replace windshield
wiper EMI cable (para 7-61).
(5) If continuity is present, replace windshield
wiper ECU (para 7-62).
(6) Connect connector P2 to connector J2.
(7) Connect connector PX22 to windshield wiper
motor.
(8) Install PDP on dashboard with three screws.
(9) Install three washers and screws in PDP.
(10) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-858
2-858
2-858
2-858
2-858

1.

START

YES

NO

Windshield washer
operates.
Horn operates.
Is 24 vdc present on
connector PX22-3?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 4 of this fault.

Faulty turn signal switch.
Faulty windshield wiper
motor.
Faulty windshield wiper
EMI cable.
Faulty dashboard cable
assembly.

e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-859
2-859
2-859
2-859
2-859

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector PX22 from windshield
wiper motor.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector PX22-3.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 24 vdc is not present, go to step 4 of
this fault.
(11) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-860
2-860
2-860
2-860
2-860

YES

NO

2.
Windshield washer
operates.
Horn operates.
Is continuity present
between connector PX22-1
and a known good ground?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Go to step 5 of this fault.

3.

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.
If continuity is present,
windshield wiper motor is
faulty.

Faulty turn signal switch.
Faulty windshield wiper
motor.
Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

Windshield washer
operates.
Horn operates.
Dashboard cable
assembly OK.
Windshield wiper EMI
cable OK.

POSSIBLE PROBLEMS

Faulty turn signal switch.
Faulty windshield wiper
motor.

Is continuity present
between turn signal
switch connector
terminals 4 and 6?

Replace turn signal
switch (para 7-25).

Replace windshield wiper
motor (para 18-4).

e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-861
2-861
2-861
2-861
2-861

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX22-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 5 of
this fault.
(5) Connect connector PX22 to windshield
wiper motor.

CONTINUITY TEST
(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect turn signal switch connector from
connector P18.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 6.
(5) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 4.
(6) Position windshield wiper switch to high
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace turn
signal switch (para 7-25).
(8) If continuity is present, replace windshield
wiper motor (para 18-4).
(9) Position windshield wiper switch to off
(TM 9-2320-365-10).
(10) Connect turn signal switch connector to
connector P18.
(11) Install instrument panel assembly (para 7-15).
(12) Install PDP on dashboard with three screws.
(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-862
2-862
2-862
2-862
2-862

4.

Is 24 vdc present on
connector J2-2?

NO

YES

KNOWN INFO

Windshield washer
operates.
Horn operates.
Turn signal switch OK.
Windshield wiper
motor OK.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

NO

KNOWN INFO

Windshield washer
operates.
Horn operates.
Turn signal switch OK.
Windshield wiper
motor OK.

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

5.

Is continuity present
between connector J2-3
and a known good ground?

YES

Continuity Test or
STE/ICE-R #91

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

If 24 vdc is not present,
wire 1569 in dashboard
cable assembly is faulty.
If 24 vdc is present,
windshield wiper EMI
cable is faulty.

If continuity is not present,
wire 3037 in dashboard
cable assembly is faulty.
If continuity is present,
windshield wiper EMI
cable is faulty.

Repair wire 1569 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield wiper
EMI cable (para 7-61).

Repair wire 3037 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield wiper
EMI cable (para 7-61).

e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)
e76. ALL WINDSHIELD WIPER SPEEDS DO NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-863
2-863
2-863
2-863
2-863

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector J2 from connector P2.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J2-2.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, repair wire 1569
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If 24 vdc is present, replace windshield
wiper EMI cable (para 7-61).
(8) Position master power switch to off
(TM 9-2320-365-10).
(9) Connect connector P2 to connector J2.
(10) Install PDP on dashboard with three screws.
(11) Install three washers and screws in PDP.
(12) Install PDP cover (para 16-2).

CONTINUITY TEST

(1) Disconnect connector J2 from connector P2.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J2-3.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3037
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) If continuity is present, replace
windshield wiper EMI cable (para 7-61).
(7) Connect connector P2 to connector J2.
(8) Install PDP on dashboard with three screws.
(9) Install three washers and screws in PDP.
(10) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-864
2-864
2-864
2-864
2-864

1.

START

YES

NO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

Is 24 vdc present on
connector PX21-6?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 5 of this fault.

Faulty dashboard cable
assembly.
Faulty windshield wiper
motor.
Faulty turn signal switch.
Faulty windshield wiper
ECU.

e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-865
2-865
2-865
2-865
2-865

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Disconnect windshield wiper ECU from
connector PX21.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector PX21-6.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position windshield wiper switch to
intermittent (TM 9-2320-365-10) and note
reading on multimeter.
(8) If 24 vdc is not present, go to step 5 of this
fault.
(9) Position windshield wiper switch to off
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-866
2-866
2-866
2-866
2-866

YES

NO

2.
Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

Is continuity present
between connector PX21-4
and a known good ground?
If continuity is not present,
wire 3034 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

NO

3.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is 24 vdc present on
connector PX22-5?

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 6 of this fault.

Faulty dashboard cable
assembly.
Faulty windshield wiper
motor.
Faulty turn signal switch.
Faulty windshield wiper
ECU.

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

POSSIBLE PROBLEMS

Faulty windshield wiper
motor.
Faulty dashboard cable
assembly.
Faulty turn signal switch.
Faulty windshield wiper
ECU.

Repair wire 3034 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-867
2-867
2-867
2-867
2-867

CONTINUITY TEST

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX21-4.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3034
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) Connect windshield wiper ECU to
connector PX21.

(1) Remove three screws from PDP.
(2) Remove three screws and washers from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector PX22 from windshield
wiper motor.
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
connector PX22-5.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Position windshield wiper switch to
intermittent (TM 9-2320-365-10) and note
reading on multimeter.
(10) If 24 vdc is not present, go to step 6 of
this fault.
(11) Position windshield wiper switch to off
(TM 9-2320-365-10).
(12) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-868
2-868
2-868
2-868
2-868

YES

NO

4.

Is 24 vdc present on
connector PX22-2?

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 8 of this fault.

5.
Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

Faulty turn signal switch.
Faulty dashboard cable
assembly.

Is continuity present
between turn signal
switch connector
terminals 4 and 7?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.
If continuity is present,
wire 1597 is faulty.

Faulty windshield wiper
motor.
Faulty dashboard cable
assembly.
Faulty windshield wiper
ECU.

If 24 vdc is present,
windshield wiper motor is
faulty.

Replace windshield wiper
motor (para 18-4).

Replace turn signal
switch (para 7-25).

Repair wire 1597 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-869
2-869
2-869
2-869
2-869

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
connector PX22-2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10).
(5) Position windshield wiper switch to
intermittent (TM 9-2320-365-10) and note
reading on multimeter.
(6) If 24 vdc is not present, go to step 8 of this
fault.
(7) If 24 vdc is present, replace windshield
wiper motor (para 18-4).
(8) Position windshield wiper switch to off
(TM 9-2320-365-10).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector PX22 to windshield wiper
motor.

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect turn signal switch connector from
connector P18.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 4.
(5) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 7.
(6) Position windshield wiper switch to intermittent
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace turn
signal switch (para 7-25).
(8) If continuity is present, repair wire 1597
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) Position windshield wiper switch to off
(TM 9-2320-365-10).
(10) Connect turn signal switch connector to
connector P18.
(11) Install instrument panel assembly (para 7-15).
(12) Connect windshield wiper ECU to connector
PX21.
(13) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-870
2-870
2-870
2-870
2-870

YES

NO

6.

Is continuity present
between connector PX21-1
and connector P18-9?
If continuity is not present,
wire 1599 is faulty.

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

7.

YES

NO

KNOWN INFO

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.

POSSIBLE PROBLEMS

Is continuity present
between turn signal
switch connector
terminals 5 and 9?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.

Faulty dashboard cable
assembly.
Faulty turn signal switch.
Faulty windshield wiper
ECU.

Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield wiper
ECU.

Repair wire 1599 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace turn signal
switch (para 7-25).

e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-871
2-871
2-871
2-871
2-871

CONTINUITY TEST

CONTINUITY TEST

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect windshield wiper ECU from
connector PX21.
(3) Disconnect connector P18 from turn signal
switch connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector PX21-1.
(6) Connect negative (-) probe of multimeter to
connector P18-9 and note reading on
multimeter.
(7) If continuity is not present, repair wire 1599
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 9.
(3) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 5.
(4) Position windshield wiper switch to intermittent
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If continuity is not present, replace turn
signal switch (para 7-25).
(6) Position windshield wiper switch to off
(TM 9-2320-365-10).
(7) Connect windshield wiper ECU to
connector PX21.
(8) Connect connector P18 to turn signal switch
connector.
(9) Install instrument panel assembly (para 7-15).
(10) Install PDP on dashboard with three screws.
(11) Install three washers and screws in PDP.
(12) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-872
2-872
2-872
2-872
2-872

YES

NO

Is continuity present
between connector PX21-3
and connector J2-4?
If continuity is not present,
wire 1916 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Windshield washer
operates.
Horn operates.
Windshield wiper operates
on high speed.
Windshield wiper operates
on low speed.
Windshield wiper
motor OK.

Faulty dashboard cable
assembly.
Faulty windshield wiper
ECU.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

8.

Repair wire 1916 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield
wiper ECU (para 7-62).

e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)
e77. WINDSHIELD WIPER DOES NOT OPERATE ON INTERMITTENT SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-873
2-873
2-873
2-873
2-873

CONTINUITY TEST

(1) Disconnect connector J2 from connector P2.
(2) Disconnect windshield wiper ECU from
connector PX21.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector PX21-3.
(5) Connect negative (-) probe of multimeter to
connector J2-4 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1916
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(7) If continuity is present, replace windshield
wiper ECU (para 7-62).
(8) Connect windshield wiper ECU to connector
PX21.
(9) Connect connector P2 to connector J2.
(10) Install PDP on dashboard with three screws.
(11) Install three washers and screws in PDP.
(12) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-874
2-874
2-874
2-874
2-874

1.

START

YES

NO

Windshield wiper operates
on low speed.
Is 24 vdc present on
connector PX22-4?

WARNING
Read WARNING
on following page.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

Go to step 2 of this fault.

REASON FOR QUESTION
If 24 vdc is present,
windshield wiper
motor is faulty.

Faulty windshield
wiper motor.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

Replace windshield wiper
motor (para 18-4).

e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-875
2-875
2-875
2-875
2-875

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect connector PX22 from windshield
wiper motor.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector PX22-4.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position master power switch to on
(TM 9-2320-365-10).
(10) Position windshield wiper switch to high
(TM 9-2320-365-10) and note reading on
multimeter.
(11) If 24 vdc is not present, go to step 2 of this
fault.
(12) If 24 vdc is present, replace windshield
wiper motor (para 18-4).
(13) Position windshield wiper switch to off
(TM 9-2320-365-10).
(14) Position master power switch to off
(TM 9-2320-365-10).
(15) Connect connector PX22 to windshield
wiper motor.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-876
2-876
2-876
2-876
2-876

2.

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
turn signal switch is faulty.

Is continuity present
between turn signal
switch connector
terminals 4 and 6?

Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

POSSIBLE PROBLEMS

Windshield wiper operates
on low speed.
Windshield wiper
motor OK.

Replace turn signal
switch (para 7-25).

e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-877
2-877
2-877
2-877
2-877

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect turn signal switch connector
from connector P18.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 4.
(5) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 6.
(6) Position windshield wiper switch to high
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace turn signal
switch (para 7-25).
(8) Position windshield wiper switch to off
(TM 9-2320-365-10).
(9) Connect turn signal switch connector to
connector P18.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-878
2-878
2-878
2-878
2-878

YES

NO

3.

Is 24 vdc present on
connector J2-1?

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
If 24 vdc is not present,
wire 1590 is faulty. If 24
vdc is present, windshield
wiper EMI cable is faulty.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty windshield wiper
EMI cable.

Windshield wiper operates
on low speed.
Windshield wiper
motor OK.
Turn signal switch OK.

Repair wire 1590 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace windshield
wiper EMI cable
(para 7-61).

e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)
e78. WINDSHIELD WIPER DOES NOT OPERATE ON HIGH SPEED (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-879
2-879
2-879
2-879
2-879

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Disconnect connector J2 from connector P2.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J2-1.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position windshield wiper switch to high
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1590
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) If 24 vdc is present, replace windshield wiper
EMI cable (para 7-61).
(9) Position windshield wiper switch to off
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Connect connector J2 to connector P2.
(12) Install PDP on dashboard with three screws.
(13) Install three washers and screws in PDP.
(14) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-880
2-880
2-880
2-880
2-880

1.

START

YES

Circuit breaker OK.
Windshield washer
operates.
Is 24 vdc present on
connector P5?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

WARNING
Read WARNING
on following page.

NO

Faulty front lights cable
assembly.
Faulty horn.
Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty relay K32.

e79. HORN DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

References
TM 9-4910-571-12&P

Go to step 3 of this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-881
2-881
2-881
2-881
2-881

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove two screws and washers from front
grille.
(2) Remove screw and washer from front grille.
(3) Remove front grille from cab.
(4) Disconnect connector P5 from horn.
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
connector P5.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Press horn button (TM 9-2320-365-10) and
note reading of multimeter.
(10) If 24 vdc is not present, go to step 3 of this
fault.
(11) Position master power switch to off
(TM 9-2320-365-10).
(12) Connect connector P5 to horn.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-882
2-882
2-882
2-882
2-882

e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)

YES

2.

Is continuity present
between connector P6 and
a known good ground?
If continuity is not present,
wire 3035 is faulty. If
continuity is present, horn
is faulty.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Circuit breaker OK.
Windshield washer
operates.
Turn signal switch OK.
Dashboard cable
assembly OK.
Relay K32 OK.

POSSIBLE PROBLEMS

Faulty front lights cable
assembly.
Faulty horn.

Continuity Test or
STE/ICE-R #91

Repair wire 3035 (para 2-40)
or replace front lights cable
assembly (para 7-74).

Replace horn
(para 7-44).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-883
2-883
2-883
2-883
2-883

CONTINUITY TEST

(1) Disconnect connector P6 from horn.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P6.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3035
(para 2-40) or replace front lights cable
assembly (para 7-74).
(6) If continuity is present, replace horn
(para 7-44).
(7) Connect connector P6 to horn.
(8) Position front grille on cab with washer and
screw.
(9) Position two washers and screws in front
grille.
(10) Tighten screw to 48-60 lb-in. (5-7 N·m).
(11) Tighten two screws to 24 lb-in. (3 N·m).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-884
2-884
2-884
2-884
2-884

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

3.
Circuit breaker OK.
Windshield washer
operates.
Horn OK.

POSSIBLE PROBLEMS

Faulty turn signal switch.
Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty relay K32.

If continuity is not present,
turn signal switch is faulty.

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

NO

Voltage Test or
STE/ICE-R #89

If 24 vdc is not present,
wire 25 is faulty.

Circuit breaker OK.
Windshield washer
operates.
Horn OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.
Faulty relay K32.

Is 24 vdc present on
relay K32 terminal 86?

4.

YES

NO

Is continuity present
between turn signal
switch connector terminal
4 and terminal 12?

Replace turn signal
switch (para 7-25).

Repair wire 25 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-885
2-885
2-885
2-885
2-885

CONTINUITY TEST

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector P18 from turn signal
switch connector.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
turn signal switch connector terminal 4.
(5) Connect negative (-) probe of multimeter to
turn signal switch connector terminal 12.
(6) Press horn button (TM 9-2320-365-10)
and note reading on multimeter.
(7) If continuity is not present, replace turn
signal switch (para 7-25).
(8) Connect connector P18 to turn signal
switch connector.
(9) Install instrument panel assembly (para 7-15).

(1) Remove PDP cover (para 16-2).
(2) Remove relay K32 from PDP.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
PDP, terminal 86, where relay K32 was
removed.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Press horn button (TM 9-2320-365-10)
and note reading on multimeter.
(8) If 24 vdc is not present, repair wire 25
(para 2-40) or WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) Position master power switch to off
(TM 9-2320-365-10).

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-886
2-886
2-886
2-886
2-886

5.

Is continuity present
between relay K32
terminal 85 and a known
good ground?

YES

If continuity is not present,
wire 3036 is faulty.

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

NO

Voltage Test or
STE/ICE-R #89

6.

Is 24 vdc present on
relay K32 terminal 30?
If 24 vdc is not present,
wire 26 is faulty.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

Continuity Test or
STE/ICE-R #91

Circuit breaker OK.
Windshield washer
operates.
Horn OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K32.
Faulty front lights cable
assembly.

Circuit breaker OK.
Windshield washer
operates.
Horn OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K32.
Faulty front lights cable
assembly.

Repair wire 3036 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 26 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-887
2-887
2-887
2-887
2-887

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K32 was
removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3036
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 30, where relay K32 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, repair wire 26
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-888
2-888
2-888
2-888
2-888

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

NO

WARNING
Read WARNING
on following page.
Circuit breaker OK.
Windshield washer
operates.
Horn OK.
Turn signal switch OK.

POSSIBLE PROBLEMS

Faulty relay K32.
Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

If 24 vdc is not present,
relay K32 is faulty.

7.

Is 24 vdc present at
relay K32 terminal 87?

Replace relay K32
(para 7-9).

e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-889
2-889
2-889
2-889
2-889

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Install relay K32 in PDP.
(5) Set multimeter to volts dc.
(6) Connect positive (+) probe of multimeter to
terminal 87 on relay K32.
(7) Connect negative (-) probe of multimeter to
ground.
(8) Position master power switch to on
(TM 9-2320-365-10).
(9) Press horn button (TM 9-2320-365-10) and
note reading on multimeter.
(10) If 24 vdc is not present, replace relay K32
(para 7-9).
(11) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-890
2-890
2-890
2-890
2-890

YES

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Voltage Test or
STE/ICE-R #89

NO

WARNING
Read WARNING
on following page.
8.

Is 24 vdc present at
connector J27-1?

Circuit breaker OK.
Windshield washer
operates.
Horn OK.
Turn signal switch OK.
Relay K32 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty front lights cable
assembly.

If 24 vdc is not present,
wire 26 in dashboard
cable assembly is
faulty. If 24 vdc is
present, wire 26 in front
lights cable assembly is
faulty.

Repair wire 26 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 26 (para 2-40)
or replace front lights cable
assembly (para 7-74).

e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)
e79. HORN DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-891
2-891
2-891
2-891
2-891

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST
(1) Disconnect connector J27 from connector P27.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector J27-1.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Press horn button (TM 9-2320-365-10) and
note reading on multimeter.
(7) If 24 vdc is not present, repair wire 26
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) If 24 vdc present, repair wire 26
(para 2-40) or replace front lights cable
assembly (para 7-74).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector J27 to connector P27.
(11) Install PDP on dashboard with three screws.
(12) Install three washers and screws in PDP.
(13) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-892
2-892
2-892
2-892
2-892

1.

START

YES

NO

Chemical detector indicator
operates.

If 12 vdc is not present,
wire 1803 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
Is 12 vdc present at
terminal lug TL97?

Go to step 3 of this fault.

Faulty dashboard cable
assembly.
Faulty chemical alarm kit
cable assembly.
Faulty chemical alarm.

e80. CHEMICAL ALARM DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-893
2-893
2-893
2-893
2-893

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
terminal lug TL97.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 vdc is not present, go to step 3 of
this fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-894
2-894
2-894
2-894
2-894

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

2.
Continuity Test
STE/ICE-R #91

YES

NO

Is continuity present
between terminal lug TL98
and a known good ground?
If continuity is not present,
wire 1804 is faulty. If
continuity is present,
chemical alarm is faulty.

Chemical detector indicator
operates.
POSSIBLE PROBLEMS

Replace chemical alarm.
Notify NBC.

Go to step 4 of this fault.

Faulty dashboard cable
assembly.
Faulty chemical alarm kit
cable assembly.
Faulty chemical alarm.

e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-895
2-895
2-895
2-895
2-895

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
terminal lug TL98.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 4 of this
fault.
(5) If continuity is present, replace chemical
alarm (notify NBC).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-896
2-896
2-896
2-896
2-896

YES

NO

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
Is 12 vdc present at
connector P99-1?

Chemical detector indicator
operates.
Chemical alarm OK.

POSSIBLE PROBLEMS

3.

Faulty dashboard cable
assembly.
Faulty chemical alarm kit
cable assembly.

If 12 vdc is not present,
wire 1803 in dashboard
cable assembly is faulty.
If 12 vdc is present, wire
1803 in chemical alarm
kit cable assembly is
faulty.

Repair wire 1803 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1803 (para 2-40)
or replace chemical alarm kit
cable assembly (para 7-52).

e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-897
2-897
2-897
2-897
2-897

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P99 from connector
J99.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P99-1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1803
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(8) If 24 vdc is present, repair wire 1803
(para 2-40) or replace chemical alarm kit
cable assembly (para 7-52).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector P99 to connector J99.
(11) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-898
2-898
2-898
2-898
2-898

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Chemical detector indicator
operates.
Chemical alarm OK.

POSSIBLE PROBLEMS

4.

Is continuity present at
connector P99-2?

Continuity Test or
STE/ICE-R #91

If continuity is not present,
wire 1804 in dashboard
cable assembly is faulty.
If continuity is present,
wire 1804 in chemical
alarm kit cable assembly
is faulty.

Faulty dashboard cable
assembly.
Faulty chemical alarm kit
cable assembly.

Repair wire 1804 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1804 (para 2-40)
or replace chemical alarm kit
cable assembly (para 7-52).

e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)
e80. CHEMICAL ALARM DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-899
2-899
2-899
2-899
2-899

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P99 from connector J99.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P99-2.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If continuity is not present, repair wire 1804
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) If continuity is present, repair wire 1804
(para 2-40) or replace chemical alarm kit
cable assembly (para 7-52).
(8) Connect connector P99 to connector J99.
(9) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-900
2-900
2-900
2-900
2-900

1.

START

YES

NO

Nothing.

Is 12 vdc present on
connector J106-E?
If 12 vdc is not present,
wire 1802 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

YES

NO

2.

Is continuity present
between connector J106-B
and a known good ground?
If continuity is not present,
wire 3029 is faulty.

Nothing.

Faulty start and charging
cable assembly.
Faulty dashboard cable
assembly.
Faulty lighted indicator
display.
Faulty chemical detector.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty start and charging
cable assembly.
Faulty dashboard cable
assembly.
Faulty lighted indicator
display.
Faulty chemical detector.

e81. CHEMICAL DETECTOR DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-75 lb-in. (Item 86, Appendix B)

References
TM 9-4910-571-12&P

Repair wire 1802 (para 2-40)
or replace start and charging
cable assembly (para 7-82).

Repair wire 3029 (para 2-40)
or replace start and charging
cable assembly (para 7-82).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-901
2-901
2-901
2-901
2-901

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
connector J106-E.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 12 vdc is not present, repair wire 1802
(para 2-40) or replace start and charging cable
assembly (para 7-82).
(6) Position master power switch to off
(TM 9-2320-365-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J106-B.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3029
(para 2-40) or replace start and charging cable
assembly (para 7-82).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-902
2-902
2-902
2-902
2-902

YES

NO

3.

If continuity is not present,
wire 1803 is faulty.

Is continuity present
between connector J106-A
and PX7-2?

Start and charging cable
assembly OK.

Faulty dashboard cable
assembly.
Faulty lighted indicator
display.
Faulty chemical detector.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 1803 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-903
2-903
2-903
2-903
2-903

CONTINUITY TEST

(1) Disconnect batteries (para 7-48).
(2) Remove four screws from lighted indicator
display.
(3) Remove lighted indicator display from
instrument panel assembly.
(4) Disconnect connector PX7 from lighted
indicator display.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector J106-A.
(7) Connect negative (-) probe of multimeter to
connector PX7-2 and note reading on
multimeter.
(8) If continuity is not present, repair wire 1803
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) Connect connector J106 to connector P106.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-904
2-904
2-904
2-904
2-904

YES

NO

YES

NO

4.

5.

Is continuity present
between connector PX7-17
and a known good ground?
If continuity is not present,
wire 3030 is faulty.

Is continuity present
between connector PX7-2
and connector PX7-17?

Faulty dashboard cable
assembly.
Faulty lighted indicator
display.
Faulty chemical detector.

Start and charging cable
assembly OK.

If continuity is not present,
lighted indicator display is
faulty. If continuity is
present, chemical detector
is faulty.

Start and charging cable
assembly OK.
Dashboard cable
assembly OK.

Faulty lighted indicator
display.
Faulty chemical detector.

Replace chemical detector.
Notify NBC.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Repair wire 3030 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace lighted indicator
display (para 7-16).

e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)
e81. CHEMICAL DETECTOR DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7-2.
(3) Connect negative (-) probe of multimeter to
connector PX7-17 and note reading on
multimeter.
(4) If continuity is not present, replace lighted
indicator display (para 7-16).
(5) If continuity is present, replace chemical
detector (notify NBC).
(6) Connect lighted indicator display to
connector PX7.
(7) Position lighted indicator display in
instrument panel assembly with four screws.
(8) Tighten four screws to 6-10 lb-in. (1 N·m).
(9) Connect batteries (para 7-48).

CONTINUITY TEST

2-905

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX7-17.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3030
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Perform Electrical System Troubleshooting
e1. Circuit Breaker Does Not Operate on
circuit breaker CB40 prior to beginning
this task.

NOTE

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Personnel Required
(2)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1

2-906 Change 2

NO

REASON FOR QUESTION

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

1.

POSSIBLE PROBLEMS

KNOWN INFO

Is continuity present from
connector P110 socket T?

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

CAUTION
Read CAUTION
on following page.

START

Go to step 21 of this fault.

Faulty air pressure switch.
Faulty air pressure transducer.
Faulty manifold valve
assembly.
Faulty CTIS ECU.
Faulty start and charging cable
assembly.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.

TM 9-2320-365-20-1

Change 2 2-907

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CONTINUITY TEST

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

CAUTION

NOTE

(1) Start engine (TM 9-2320-365-10).
(2) Allow air pressure to build until FRONT BRAKE
AIR and REAR BRAKE AIR pressure gages read
approximately 120 PSI.
(3) Shut down engine (TM 9-2320-365-10).
(4) Disconnect connector P110 from CTIS ECU.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector P110 socket T.
(7) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(8) If continuity is not present, go to step 21 of
this fault.

TM 9-2320-365-20-1

NO

REASON FOR QUESTION

TEST OPTIONS
KNOWN INFO

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

2.

WARNING
Read WARNING
on following page.

Is 24 VDC present at
connector P110 socket H?

Voltage Test or
STE/ICE-R Test #89

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Go to step 25 of this fault.

2-908 Change 2

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

TM 9-2320-365-20-1

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Position master power switch to on
(TM 9-2320-365-10).
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P110 socket H.
(4) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(5) If 24 VDC is not present, go to step 25 of
this fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

Change 2 2-909

TM 9-2320-365-20-1

NO

TEST OPTIONS
KNOWN INFO

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

3.

Is continuity present from
connector P110 socket F to
known good ground?

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Go to step 26 of this fault.

2-910 Change 2

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-911

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket F.
(3) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(4) If continuity is not present, go to step 26 of
this fault.

TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

Replace CTIS cable assembly
(para 7-53).

Is continuity present from
connector P111 pin A to
connector P112 socket A?

Is continuity present from
connector P111 pin A to
connector P112 socket B?

4.

KNOWN INFO
5.

2-912 Change 2

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve
assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve
assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If continuity is not present,
CTIS cable assembly is faulty.

If continuity is not present,
CTIS cable assembly is faulty.

Change 2 2-913

TM 9-2320-365-20-1

CONTINUITY TEST

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P112 from pneumatic
controller connector.
(3) Disconnect connector J111 from connector
P111.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector P111 pin A.
(6) Connect negative (-) probe of multimeter to
connector P112 socket A and note reading
on multimeter.
(7) If continuity is not present, replace CTIS
cable assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P111 pin A.
(3) Connect negative (-) probe of multimeter to
connector P112 socket B and note reading
on multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).
(5) Connect connector J111 from connector
P111.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

Replace CTIS cable assembly
(para 7-53).

Is continuity present from
connector P110 socket R to
connector P112 socket D?

Is continuity present from
connector P110 socket B to
connector P112 socket F?

TM 9-2320-365-20-1

6.

7.

2-914 Change 2

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If continuity is not present,
CTIS cable assembly is faulty.

If continuity is not present,
CTIS cable assembly is faulty.

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket R.
(3) Connect negative (-) probe of multimeter to
connector P112 socket D and note reading
on multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

Change 2 2-915

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket B.
(3) Connect negative (-) probe of multimeter to
connector P112 socket F and note reading
on multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

CONTINUITY TEST

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

Replace CTIS cable assembly
(para 7-53).

Is continuity present from
connector P110 socket C to
connector P112 socket E?

Is continuity present from
connector P110 socket P to
terminal lug TL50?

TM 9-2320-365-20-1

8.

9.

2-916 Change 2

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If continuity is not present,
CTIS cable assembly is faulty.

If continuity is not present,
CTIS cable assembly is faulty.

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket C.
(3) Connect negative (-) probe of multimeter to
connector P112 socket E and note reading
on multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

Change 2 2-917

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket P.
(3) Connect negative (-) probe of multimeter to
terminal lug TL50 and note reading on
multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).
(5) Connect connector P110 to CTIS ECU.

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

YES

NO

KNOWN INFO

Replace manifold valve assembly
(para 12-7).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES
Replace manifold valve assembly
(para 12-7).

NO

TM 9-2320-365-20-1

Resistance Test or
STE/ICE-R Test #91

Resistance Test or
STE/ICE-R Test #91

10.

11.

2-918 Change 2

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Is 30-80 ohms resistance
present from pneumatic
controller connector pin F to
pin A?

Is 30-80 ohms resistance
present from pneumatic
controller connector pin D to
pin B?

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If 30-80 ohms resistance is
not present, manifold valve
assembly is faulty.

If 30-80 ohms resistance is
not present, manifold valve
assembly is faulty.

TM 9-2320-365-20-1

Change 2 2-918.1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
pneumatic controller connector pin D.
(3) Connect negative (-) probe of multimeter to
pneumatic controller connector pin B and
note reading on multimeter.
(4) If 30-80 ohms resistance is not present,
replace manifold valve assembly (para 12-7).

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
pneumatic controller connector pin F.
(3) Connect negative (-) probe of multimeter to
pneumatic controller connector pin A and
note reading on multimeter.
(4) If 30-80 ohms resistance is not present,
replace manifold valve assembly (para 12-7).

RESISTANCE TEST

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

TM 9-2320-365-20-1

Resistance Test or
STE/ICE-R Test #91

Repair manifold valve assembly
(para 12-7).

12.

2-918.2 Change 2

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Is 30-80 ohms resistance
present from pneumatic
controller connector pin E to
pin A?

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.

POSSIBLE PROBLEMS

Faulty air pressure transducer.
Faulty manifold valve assembly.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If 30-80 ohms resistance is
not present, manifold valve
assembly is faulty.

TM 9-2320-365-20-1

RESISTANCE TEST

Change 2 2-918.3

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
pneumatic controller connector pin E.
(3) Connect negative (-) probe of multimeter to
pneumatic controller connector pin A and
note reading on multimeter.
(4) If 30-80 ohms resistance is not present,
repair manifold valve assembly (para 12-7).
(5) Connect connector P112 to pneumatic
controller connector.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

TM 9-2320-365-20-1

Resistance Test or
STE/ICE-R Test #91

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

13.

2-918.4 Change 2

Is 1-50 ohms resistance
present from pressure
transducer connector pin A to
pin B?

YES

NO

Replace pressure transducer
(para 12-7).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Resistance Test or
STE/ICE-R Test #91

YES

NO

Replace pressure transducer
(para 12-7).

14.

Is 1-50 ohms resistance
present from pressure
transducer connector pin B to
pin C?
If 1-50 ohms resistance is not
present, pressure transducer is
faulty.

If 1-50 ohms resistance is not
present, pressure transducer is
faulty.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

TM 9-2320-365-20-1

Change 2 2-918.5

RESISTANCE TEST

RESISTANCE TEST

(1) Disconnect connector P113 from pressure
transducer connector.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
pressure transducer connector pin A.
(4) Connect negative (-) probe of multimeter to
pressure transducer connector pin B and
note reading on multimeter.
(5) If 1-50 ohms resistance is not present, replace
pressure transducer (para 12-7).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
pressure transducer connector pin B.
(3) Connect negative (-) probe of multimeter to
pressure transducer connector pin C and
note reading on multimeter.
(4) If 1-50 ohms resistance is not present, replace
pressure transducer (para 12-7).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

TM 9-2320-365-20-1

Resistance Test or
STE/ICE-R Test #91

YES

NO

Replace pressure transducer
(para 12-7).

Is 1-50 ohms resistance
present from pressure
transducer connector pin C to
pin A?

2-918.6 Change 2

15.

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If 1-50 ohms resistance is not
present, pressure transducer is
faulty.

TM 9-2320-365-20-1

Change 2 2-918.7

RESISTANCE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
pressure transducer connector pin C.
(3) Connect negative (-) probe of multimeter to
pressure transducer connector pin A and
note reading on multimeter.
(4) If 1-50 ohms resistance is not present, replace
pressure transducer (para 12-7).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

TM 9-2320-365-20-1

YES

NO

2-918.8 Change 2

16.

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Is continuity present from
connector P110 socket c to
connector P113 socket C?

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

17.

Is continuity present from
connector P110 socket b to
connector P113 socket B?

If continuity is not present,
CTIS cable assembly is faulty.

If continuity is not present,
CTIS cable assembly is faulty.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.
Air pressure transducer OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.
Air pressure transducer OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

TM 9-2320-365-20-1

Change 2 2-918.9

(1) Disconnect connector P110 from CTIS ECU.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P110 socket c.
(4) Connect negative (-) probe of multimeter to
connector P113 socket C and note reading on
multimeter.
(5) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket b.
(3) Connect negative (-) probe of multimeter to
connector P113 socket B and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

CONTINUITY TEST

CONTINUITY TEST

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

TM 9-2320-365-20-1

YES

NO

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector P110 socket j to
connector P113 socket A?

19.

Replace CTIS cable assembly
(para 7-53).

Go to step 20 of this fault

2-918.10 Change 2

18.

Is connector P113 socket A,
socket B, or socket C short
circuited?

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.

POSSIBLE PROBLEMS

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

Faulty air pressure transducer.
Faulty CTIS ECU.
Faulty CTIS cable assembly.

If continuity is not present,
CTIS cable assembly is faulty.

If connector P113 is short
circuited, CTIS cable assembly
is faulty.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-918.11

CONTINUITY TEST

(10) Connect negative (-) probe of multimeter to
all other sockets on connector P113 and note
reading on multimeter
(11) If continuity not present is steps 3, 4, 6, 7, 9,
and 10, go to step 20 of this fault.
(12) If continuity present is steps 3, 4, 6, 7, 9, or
10, replace CTIS cable assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P113 socket A.
(3) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(4) Connect negative (-) probe of multimeter to
all other sockets on connector P113 and
note reading on multimeter.
(5) Connect positive (+) probe of multimeter to
connector P113 socket B.
(6) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(7) Connect negative (-) probe of multimeter to
all other sockets on connector P113 and
note reading on multimeter.
(8) Connect positive (+) probe of multimeter to
connector P113 socket C.
(9) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110 socket j.
(3) Connect negative (-) probe of multimeter to
connector P113 socket A and note reading
on multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

TM 9-2320-365-20-1

KNOWN INFO

2-918.12 Change 2

20.

Is 4.9-5.1 VDC present at
connector P113 socket B?

Voltage Test or
STE/ICE-R Test #89

WARNING
Read WARNING
on following page.

Replace pressure transducer
(para 12-7).

POSSIBLE PROBLEMS

21.

NO

REASON FOR QUESTION

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
air pressure switch pin A to
air pressure switch pin B?

YES
Replace air pressure switch
(para 23-8).

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

Faulty air pressure switch.
Faulty start and charging cable
assembly.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.

If continuity is not present, air
pressure switch is faulty.

If 4.9-5.1 VDC is not present,
CTIS ECU is faulty. If 4.9-5.1
VDC is present, pressure
transducer is faulty.

NO

YES
Replace CTIS ECU (para 12-6).

TEST OPTIONS

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.
WTEC II / WTEC III dashboard
cable assembly OK.
Manifold valve assembly OK.
CTIS cable assembly OK.

POSSIBLE PROBLEMS
Faulty air pressure transducer.
Faulty CTIS ECU.

TM 9-2320-365-20-1

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 2 2-918.13

(1) Connect connector P110 to CTIS ECU.
(2) Disconnect connector P84 from air pressure
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
air pressure switch pin A.
(5) Connect negative (-) probe of multimeter to
air pressure switch pin B and note reading
on multimeter.
(6) If continuity is not present, replace air
pressure switch (para 23-8).

CONTINUITY TEST

(1) Connect connector P110 from CTIS ECU.
(2) Position master power switch to on
(TM 9-2320-365-10).
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector P113 socket B.
(5) Connect negative (-) probe of multimeter to
known good ground and note reading on
multimeter.
(6) Position master power switch to off
(TM 9-2320-365-10).
(7) If 4.9-5.1 VDC is not present, replace CTIS
ECU (para 12-6).
(8) If 4.9-5.1 VDC is present, replace air
pressure transducer (para 12-7).

Perform steps (9) and (10) if 4.9-5.1 VDC
is not present.

(9) Connect connector P113 to air pressure
transducer connector.
(10) Install kick panel (para 16-3).

VOLTAGE TEST

NOTE

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector P84 socket A to
ground?
If continuity is not present,
wire 3032 in start and charging
cable assembly is faulty.

NO

Repair wire 3032 from connector P84 socket A
to terminal lug TL85 (para 2-40) or replace
start and charging cable assembly (para 7-82).

TM 9-2320-365-20-1

22.

TEST OPTIONS

REASON FOR QUESTION

YES

NO

Continuity Test or
STE/ICE-R Test #91

Replace CTIS cable assembly
(para 7-53).

Is continuity present from
connector P111 pin F to
connector P110 socket T?
If continuity is not present,
CTIS cable assembly is faulty.

KNOWN INFO
23.

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

2-918.14 Change 2

TM 9-2320-365-20-1

CONTINUITY TEST

CONTINUITY TEST

Change 2 2-918.15

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to connector P84 socket A.
(3) Connect negative (-) probe of multimeter
to ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3032
from connector P84 socket A to terminal lug
TL85 (para 2-40) or replace start and
charging cable assembly (para 7-82).
(5) Connect connector P84 to air pressure
switch.

(1) Disconnect connector P110 from CTIS ECU.
(2) Remove kick panel (para 16-3).
(3) Disconnect connector P111 from connector
J111.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector P111 pin F.
(6) Connect negative (-) probe of multimeter to
connector P110 socket T and note reading
on multimeter.
(7) If continuity is not present, replace CTIS
cable assembly (para 7-53).

TM 9-2320-365-20-1

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

Is continuity present from
connector J43 socket 2 to
connector J111 socket F?

24.

Repair wire 1790 from connector P43
pin 2 to connector P84 socket B (para 2-40)
or replace start and charging cable assembly
(para 7-82).

POSSIBLE PROBLEMS

Faulty start and charging cable
assembly.
Faulty WTEC II / WTEC III
dashboard cable assembly.

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
CTIS cable assembly OK.

2-918.16 Change 2

If continuity is not present,
wire 1790 from connect J43
socket 2 to connector J111
socket F is faulty. If
continuity is present, wire
1790 from connector P43 pin
2 to connector P84 socket B is
faulty.

YES

Repair wire 1790 from connector J43
socket 2 to connector J111 socket F
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

NO

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-918.17

(1) Connect connector P110 to CTIS ECU.
(2) Remove instrument panel assembly for
access (para 7-15).
(3) Disconnect connector J43 from connector
P43.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector J43 socket 2.
(6) Connect negative (-) probe of multimeter to
connector J111 socket F and note reading
on multimeter.
(7) If continuity is not present, repair wire
1790 from connector J43 socket 2 to
connector J111 socket F (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If continuity is present, repair wire 1790
from connector P43 pin 2 to connector
P84 socket B (para 2-40) or replace start
and charging cable assembly (para 7-82).

(9) Connect connector P43 to connector J43.
(10) Install instrument panel assembly (para
7-15).
(11) Connect connector J111 to connector P111.
(12) Install kick panel (para 16-3).

TM 9-2320-365-20-1

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

YES

NO

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

TEST OPTIONS

Is continuity present from
connector J111 socket E
to circuit breaker CB40
socket 7?

Repair wire 1911 from connector J111
socket E to circuit breaker CB40 socket 7
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

KNOWN INFO
25.

Replace CTIS cable assembly (para 7-53).

2-918.18 Change 2

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.

POSSIBLE PROBLEMS
Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

If continuity is not present,
wire 1911 from connector
J111 socket E to circuit
breaker CB40 socket 7 is
faulty. If continuity is present,
CTIS cable assembly is faulty.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-918.19

(1) Connect connector P110 to CTIS ECU.
(2) Remove kick panel (para 16-3).
(3) Remove circuit breaker CB40 from PDP.
(4) Disconnect connector P111 from connector
J111.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector J111 socket E.
(7) Connect negative (-) probe of multimeter to
circuit breaker CB40 socket 7 and note
reading on multimeter.
(8) If continuity is not present, repair wire
1911 from connector J111 socket E to
circuit breaker CB40 socket 7 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If continuity is present, replace CTIS cable
assembly (para 7-53).
(10) Install circuit breaker CB40 on PDP.
(11) Connect connector J111 to connector
P111.
(12) Install kick panel (para 16-3).

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

26.
KNOWN INFO

NO

YES
Replace CTIS cable assembly
(para 7-53).

Is continuity present from
connector P111 pin A to
connector P110 socket F?

e82. CENTRAL TIRE INFLATION SYSTEM (CTIS) DOES NOT OPERATE (CONT)

2-918.20 Change 2

VOLTS gage registers in green
zone with engine running.
Circuit breaker CB40 OK.
FRONT BRAKE AIR and
REAR BRAKE AIR pressure
gages read normal.
Air pressure switch OK.
Start and charging cable
assembly OK.

Faulty WTEC II / WTEC III
dashboard cable assembly.
Faulty CTIS cable assembly.

POSSIBLE PROBLEMS

If continuity is not present,
CTIS cable assembly is faulty.
If continuity is present, wire
3031 from connector J111
socket A to terminal board
TB2 position 35 is faulty.

Repair wire 3031 from connector J111
socket A to terminal board TB2 position 35
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-919

(1) Remove kick panel (para 16-3).
(2) Disconnect connector J111 from connector
P111.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P110 socket F.
(5) Connect negative (-) probe of multimeter to
connector P111 pin A and note reading on
multimeter.
(6) If continuity is not present replace CTIS
cable assembly (para 7-53).
(7) If continuity is present, repair wire 3031
from connector J111 socket A to terminal
board TB2 position 35 (para 2-40) or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) Connect connector J111 to connector
P111.
(9) Install kick panel (para 16-3).
(10) Connect connector P110 to CTIS ECU.

TM 9-2320-365-20-1

e83. CTIS DOES NOT INFLATE TIRES

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

KNOWN INFO

CTIS deflates tires.

POSSIBLE PROBLEMS

Faulty CTIS ECU.
Faulty CTIS cable assembly.
Faulty manifold valve
assembly.

1.

START

Does replacement CTIS ECU
inflate tires?

Replace CTIS ECU (para 12-6).

Go to step 2 of this fault.
YES

NO

TEST OPTIONS

Operational Test

If CTIS inflates tires, CTIS ECU
is faulty.

REASON FOR QUESTION

2-920

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-921
2-921
2-921
2-921
2-921

OPERATIONAL TEST

(1) Disconnect connector P110 from CTIS ECU.
(2) Connect connector P110 to a known-good
CTIS ECU.
(3) Start vehicle (TM 9-2320-365-10).
(4) Allow air pressure to reach 85 psi.
(5) Deflate tires (TM 9-2320-365-10).
(6) If tires do not inflate, go to step 2 of this fault.
(7) If tires inflate, replace CTIS ECU (para 12-6).
(8) Shut down vehicle (TM 9-2320-365-10).
(9) Disconnect connector P110 from known-good
CTIS ECU.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-922
2-922
2-922
2-922
2-922

YES

NO

2.

3.

CTIS deflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-B
and connector P112-F?
If continuity is not present,
CTIS cable assembly is
faulty.

YES

NO

CTIS deflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-F
and connector P112-A?
If continuity is not present,
CTIS cable assembly is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-923
2-923
2-923
2-923
2-923

CONTINUITY TEST

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P112 from manifold
valve assembly.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P110-B.
(5) Connect negative (-) probe of multimeter to
connector P112-F and note reading on
multimeter.
(6) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-F.
(3) Connect negative (-) probe of multimeter to
connector P112-A and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-924
2-924
2-924
2-924
2-924

YES

NO

YES

NO

5.

4.
CTIS deflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-R
and connector P112-D?
If continuity is not present,
CTIS cable assembly is
faulty.

CTIS deflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-F
and connector P112-B?

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
CTIS cable assembly is
faulty.

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-925
2-925
2-925
2-925
2-925

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-R.
(3) Connect negative (-) probe of multimeter to
connector P112-D and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-F.
(3) Connect negative (-) probe of multimeter to
connector P112-B and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).
(5) Connect connector P112 to manifold valve
assembly.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-926
2-926
2-926
2-926
2-926

YES

NO

YES

NO

7.

CTIS deflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-b
and connector P113-B?
If continuity is not present,
CTIS cable assembly is
faulty.

CTIS deflates tires.
CTIS ECU OK.

If continuity is not present,
CTIS cable assembly is
faulty.

6.
KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
Is continuity present
between connector P110-c
and connector P113-C?

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-927
2-927
2-927
2-927
2-927

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector P113 from manifold
valve assembly.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P110-b.
(4) Connect negative (-) probe of multimeter to
connector P113-B and note reading on
multimeter.
(5) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-c.
(3) Connect negative (-) probe of multimeter to
connector P113-C and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-928
2-928
2-928
2-928
2-928

YES

NO

8.

Is continuity present
between connector P110-J
and connector P113-A?

CTIS deflates tires.
CTIS ECU OK.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
CTIS cable assembly is
faulty. If continuity is
present, manifold valve
assembly is faulty.

Replace CTIS cable
assembly (para 7-53).

Replace manifold valve
assembly (para 12-7).

e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)
e83. CTIS DOES NOT INFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-929
2-929
2-929
2-929
2-929

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-J.
(3) Connect negative (-) probe of multimeter to
connector P113-A and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).
(5) If continuity is present, replace manifold valve
assembly (para 12-7).
(6) Connect connector P113 to manifold valve
assembly.
(7) Install kick panel (para 16-3).
(8) Connect connector P110 to CTIS ECU.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-930
2-930
2-930
2-930
2-930

1.

START

Operational Test

YES

NO

CTIS inflates tires.

Does replacement
CTIS ECU deflate tires?
If CTIS deflates tires,
CTIS ECU is faulty.

Faulty CTIS ECU.
Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Go to step 2 of this fault.

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

e84. CTIS DOES NOT DEFLATE TIRES

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Replace CTIS ECU
(para 12-6).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-931
2-931
2-931
2-931
2-931

OPERATIONAL TEST

(1) Disconnect connector P110 from CTIS ECU.
(2) Connect connector P110 to a known-good
CTIS ECU.
(3) Start vehicle (TM 9-2320-365-10).
(4) Allow air pressure to reach 85 psi.
(5) Deflate tires (TM 9-2320-365-10).
(6) If tires do not deflate, go to step 2 of
this fault.
(7) If tires deflate, replace CTIS ECU (para 12-6).
(8) Shut down vehicle (TM 9-2320-365-10).
(9) Disconnect connector P110 from known-good
CTIS ECU.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-932
2-932
2-932
2-932
2-932

YES

NO

2.

3.

YES

NO

CTIS inflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-C
and connector P112-E?
If continuity is not present,
CTIS cable assembly is
faulty.

CTIS inflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-F
and connector P112-A?
If continuity is not present,
CTIS cable assembly is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

Continuity Test or
STE/ICE-R #91

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-933
2-933
2-933
2-933
2-933

CONTINUITY TEST

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P112 from manifold
valve assembly.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P110-C.
(5) Connect negative (-) probe of multimeter to
connector P112-E and note reading on
multimeter.
(6) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-F.
(3) Connect negative (-) probe of multimeter to
connector P112-A and note reading on
multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-934
2-934
2-934
2-934
2-934

YES

NO

YES

NO

5.

4.
CTIS inflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-R
and connector P112-D?
If continuity is not present,
CTIS cable assembly is
faulty.

CTIS inflates tires.
CTIS ECU OK.
Is continuity present
between connector P110-F
and connector P112-B?
If continuity is not present,
CTIS cable assembly is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

REASON FOR QUESTION

Continuity Test or
STE/ICE-R #91

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-935
2-935
2-935
2-935
2-935

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-R.
(3) Connect negative (-) probe of multimeter to
connector P112-D and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-F.
(3) Connect negative (-) probe of multimeter to
connector P112-B and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).
(5) Connect connector P112 to manifold valve
assembly.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-936
2-936
2-936
2-936
2-936

YES

NO

YES

NO

7.

6.

Is continuity present
between connector P110-b
and connector P113-B?

CTIS inflates tires.
CTIS ECU OK.

If continuity is not present,
CTIS cable assembly is
faulty.

CTIS inflates tires.
CTIS ECU OK.

If continuity is not present,
CTIS cable assembly is
faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

Continuity Test or
STE/ICE-R #91

TEST OPTIONS

REASON FOR QUESTION

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
Is continuity present
between connector P110-c
and connector P113-C?

Replace CTIS cable
assembly (para 7-53).

Replace CTIS cable
assembly (para 7-53).

e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-937
2-937
2-937
2-937
2-937

CONTINUITY TEST

CONTINUITY TEST

(1) Disconnect connector P113 from manifold
valve assembly.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P110-b.
(4) Connect negative (-) probe of multimeter to
connector P113-B and note reading on
multimeter.
(5) If continuity is not present, replace CTIS
cable assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-c.
(3) Connect negative (-) probe of multimeter to
connector P113-C and note reading on
multimeter.
(4) If continuity is not present, replace CTIS cable
assembly (para 7-53).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-938
2-938
2-938
2-938
2-938

YES

NO

8.

Is continuity present
between connector P110-J
and connector P113-A?

CTIS inflates tires.
CTIS ECU OK.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty CTIS cable
assembly.
Faulty manifold valve
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

If continuity is not present,
CTIS cable assembly is
faulty. If continuity is
present, manifold valve
assembly is faulty.

Replace CTIS cable
assembly (para 7-53).

Replace manifold valve
assembly (para 12-7).

e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)
e84. CTIS DOES NOT DEFLATE TIRES (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-939
2-939
2-939
2-939
2-939

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-J.
(3) Connect negative (-) probe of multimeter to
connector P113-A and note reading on
multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).
(5) If continuity is present, replace manifold valve
assembly (para 12-7).
(6) Connect connector P113 to manifold valve
assembly.
(7) Install kick panel (para 16-3).
(8) Connect connector P110 to CTIS ECU.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-940
2-940
2-940
2-940
2-940

1.

START

YES

NO

Circuit breaker OK.
PTO OK.
Is 24 vdc present on
connector P902 terminal 6?
If 24 vdc is not present,
wire 1904 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty auxiliary panel
cable assembly.
Faulty winch power
switch.
Faulty WINCH IN/OUT
switch.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Repair wire 1904 (para 2-40)
or replace auxiliary panel
cable assembly (all models
except M1079 w/o winch)
(para 7-49).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-941
2-941
2-941
2-941
2-941

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove auxiliary panel and tilt back. Do not
disconnect connectors (para 7-8).
(2) Disconnect connector P902 from winch
power switch.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector P902 terminal 6.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position PTO switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1904
(para 2-40) or replace auxiliary panel
cable assembly (all models except M1079
w/o winch) (para 7-49).
(9) Position PTO switch to off
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-942
2-942
2-942
2-942
2-942

YES

NO

2.

Is continuity present
between winch power
switch terminals 6 and 2?
If continuity is not present,
winch power switch is
faulty.

KNOWN INFO

Circuit breaker OK.
PTO OK.

POSSIBLE PROBLEMS

Faulty winch power switch.
Faulty auxiliary panel cable
assembly.
Faulty WINCH IN/OUT
switch.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace winch power
switch (para 7-18).

e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-943
2-943
2-943
2-943
2-943

CONTINUITY TEST

CONTINUITY TEST

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P112 from manifold
valve assembly.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P110-C.
(5) Connect negative (-) probe of multimeter to
connector P112-E and note reading on
multimeter.
(6) If continuity is not present, replace CTIS cable
assembly (para 7-53).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P110-F.
(3) Connect negative (-) probe of multimeter to
connector P112-A and note reading on
multimeter.
(4) If continuity is not present, replace CTIS
cable assembly (para 7-53).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-944
2-944
2-944
2-944
2-944

NO

YES

3.

NO

YES

4.

Is 24 vdc present on
connector P903 terminal 3?
If 24 vdc is not present,
wire 1924 is faulty.

Faulty WINCH IN/OUT
switch.

If continuity is not present,
WINCH IN/OUT switch is
faulty.

KNOWN INFO

Circuit breaker OK.
PTO OK.
Winch power switch OK.

POSSIBLE PROBLEMS

Faulty auxiliary panel
cable assembly.
Faulty WINCH IN/OUT
switch.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

KNOWN INFO

Circuit breaker OK.
PTO OK.
Winch power switch OK.
Auxiliary panel cable
assembly OK.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Fault not corrected.
Notify DS Maintenance.

Is continuity present
between WINCH IN/OUT
switch terminal 3 and
terminal 1?

Repair wire 1924 (para 2-40)
or replace auxiliary panel
cable assembly (all models
except M1079 w/o winch)
(para 7-49).

Replace WINCH IN/OUT
switch (para 7-18).

e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)
e85. 11K SELF-RECOVERY WINCH DOES NOT REEL IN OR PAY OUT (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-945
2-945
2-945
2-945
2-945

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

(1) Disconnect connector P903 from WINCH
IN/OUT switch.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P903 terminal 3.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10).
(6) Position PTO switch to on
(TM 9-2320-365-10).
(7) Position winch power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1924
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49).
(9) Position winch power switch to off
(TM 9-2320-365-10).
(10) Position PTO switch to off
(TM 9-2320-365-10).
(11) Position master power switch to off
(TM 9-2320-365-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
WINCH IN/OUT switch terminal 3.
(3) Connect negative (-) probe of multimeter to
WINCH IN/OUT switch terminal 1.
(4) Position WINCH IN/OUT switch to in
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If continuity is not present, replace
WINCH IN/OUT switch (para 7-18).
(6) If continuity is present, fault not corrected.
Notify DS Maintenance.
(7) Connect connector P903 to WINCH IN/OUT
switch.
(8) Install auxiliary panel (para 7-8).

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

KNOWN INFO
1.

WARNING
Read WARNING
on following page.

START

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

YES

NO

Go to step 3 of this fault.

TM 9-2320-365-20-1

Is 24 VDC present on winch
in solenoid L4 connector
terminal 1?

Circuit breaker OK.
11K self-recovery winch pays
out.

POSSIBLE PROBLEMS

Faulty winch control valve
cable assembly.
Faulty winch control valve
assembly.
Faulty WINCH IN/OUT switch.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

2-946 Change 2

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

VOLTAGE TEST

TM 9-2320-365-20-1

Change 2 2-947

(1) Remove four nuts, washers, solenoid
bracket, washers, and screws.
(2) Loosen screw and disconnect winch in
solenoid L4 connector from solenoid L4.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
winch in solenoid L4 connector terminal 1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position PTO switch to on
(TM 9-2320-365-10).
(8) Position winch power switch to on
(TM 9-2320-365-10).
(9) Position WINCH IN/OUT switch to IN
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If 24 VDC is not present, go to step 3 of
this fault.
(11) Position winch power switch to off
(TM 9-2320-365-10).
(12) Position PTO switch to off
(TM 9-2320-365-10).
(13) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

KNOWN INFO
2.

Is continuity present between
winch in solenoid L4
connector terminal 2 and a
known good ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Replace winch control
valve assembly (para 17-6).

POSSIBLE PROBLEMS

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN (CONT)

2-948 Change 2

Circuit breaker OK.
11K self-recovery winch pays
out.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.
PTO cable assembly OK.

If continuity is not present,
wire 3069 is faulty. If
continuity is present, winch
control valve assembly is
faulty.

YES

NO

Repair wire 3069 (para 2-40) or
replace winch control valve cable
assembly (para 7-85).

Faulty winch control valve
cable assembly.
Faulty winch control valve
assembly.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-949

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
winch in solenoid L4 terminal 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3069
(para 2-40) or replace winch control valve
cable assembly (para 7-85).
(5) If continuity is present, replace winch control
valve assembly (para 17-6).
(6) Connect winch in solenoid L4 connector on
solenoid L4 and tighten screw.

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

NO

Is continuity present between
WINCH IN/OUT switch
terminal 3 and terminal 1?

Continuity Test or
STE/ICE-R Test #91

YES
Replace WINCH IN/OUT
switch (para 7-18).

3.

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN (CONT)

2-950 Change 2

REASON FOR QUESTION

If continuity is not present,
WINCH IN/OUT switch is
faulty.

POSSIBLE PROBLEMS

Circuit breaker OK.
11K self-recovery winch pays
out.
Winch control valve assembly
OK.

Faulty winch in/out switch.
Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-951

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.
(3) Disconnect connector P903 from WINCH
IN/OUT switch.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
WINCH IN/OUT switch terminal 3.
(6) Connect negative (-) probe of multimeter to
WINCH IN/OUT switch terminal 1.
(7) Position WINCH IN/OUT switch to in
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If continuity is not present, replace
WINCH IN/OUT switch (para 7-18).

TM 9-2320-365-20-1

TEST OPTIONS

REASON FOR QUESTION

YES

NO

YES

4.

Is continuity present between
connector P903-1 and
connector P210-14?

Repair wire 2005 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

Continuity Test or
STE/ICE-R Test #91

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN (CONT)

2-952 Change 2

KNOWN INFO

POSSIBLE PROBLEMS

Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

If continuity is not present,
wire 2005 is faulty.

Circuit breaker OK.
11K self-recovery winch pays
out.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-953

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P210 from connector
J210.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P903-1.
(5) Connect negative (-) probe of multimeter to
connector P210-14 and note reading on
multimeter.
(6) If continuity is not present, repair wire 2005
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch (para 7-49).
(7) Connect connector P903 to WINCH IN/OUT
switch.
(8) Position auxiliary panel on auxiliary panel
housing with six screws.
(9) Tighten six screws to 24 lb-in. (3 N∙m).

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES

NO

YES

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

5.

Is continuity present between
connector J210-14 and
connector P215-2?

Repair wire 2005 (para 2-40) or replace
PTO cable assembly (para 7-77).

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN (CONT)

2-954 Change 2

POSSIBLE PROBLEMS

Circuit breaker OK.
11K self-recovery winch pay
out.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.

Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.

If continuity is not present,
wire 2005 is faulty.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-955

(1) Disconnect connector P215 from connector
J215.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J210-14.
(4) Connect negative (-) probe of multimeter to
connector P215-2 and note reading on
multimeter.
(5) If continuity is not present, repair wire 2005
(para 2-40) or replace PTO cable assembly
(para 7-77).
(6) Connect connector P210 to connector J210.
(7) Install kick panel (para 16-3).

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

YES
YES

REASON FOR QUESTION

6.

Circuit breaker OK.
11K self-recovery winch pays
out.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.
PTO cable assembly OK.

Faulty winch control valve cable
assembly.

POSSIBLE PROBLEMS

Notify DS Maintenance.

NO

Repair wire 2005 (para 2-40) or replace
winch control valve cable assembly
(para 7-85).

Is continuity present between
connector J215-2 and
connector L4-1?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present, wire
2005 is faulty. If continuity is
present, notify DS Maintenance.

2-956 Change 2

e86. 11K SELF-RECOVERY WINCH DOES NOT REEL IN (CONT)

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-957

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J215-2.
(3) Connect negative (-) probe of multimeter to
winch in solenoid L4 connector terminal 1
and note reading on multimeter.
(4) If continuity is not present, repair wire
2005
(para 2-40) or replace winch control valve
cable assembly (para 7-85).
(5) If continuity is present, notify DS
Maintenance.
(6) Connect connector P215 to connector J215.
(7) Connect winch in solenoid L4 connector to
solenoid L4 and tighten screw.

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

KNOWN INFO
1.

Is 24 VDC present on winch
out solenoid L5 connector
terminal 1?

WARNING
Read WARNING
on following page.

START

YES

NO

Go to step 3 of this fault.

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

TM 9-2320-365-20-1

2-958 Change 2

Circuit breaker OK.
11K self-recovery winch reels
in OK.

POSSIBLE PROBLEMS

Faulty winch control valve
cable assembly.
Faulty winch control valve
assembly.
Faulty WINCH IN/OUT switch.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

TM 9-2320-365-20-1

Change 2 2-959

WARNING

(1) Remove four nuts, washers, solenoid
bracket, washers, and screws.
(2) Loosen screw and disconnect winch out
solenoid L5 connector from solenoid L5.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
winch out solenoid L5 connector terminal 1.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position PTO switch to on
(TM 9-2320-365-10).
(8) Position winch power switch to on
(TM 9-2320-365-10).
(9) Position WINCH IN/OUT switch to OUT
(TM 9-2320-365-10) and note reading
on multimeter.
(10) If 24 VDC is not present, go to step 3 of
this fault.
(11) Position winch power switch to off
(TM 9-2320-365-10).
(12) Position PTO switch to off
(TM 9-2320-365-10).
(13) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

2-960 Change 2

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Is continuity present between
winch out solenoid L5
connector terminal 2 and a
known good ground?

Replace winch control
valve assembly (para 17-6).

Continuity Test or
STE/ICE-R Test #91

2.

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT (CONT)

Circuit breaker OK.
11K self-recovery winch reels
in OK.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.
PTO cable assembly OK.

Faulty winch control valve
cable assembly.
Faulty winch control valve
assembly.

If continuity is not present,
wire 3070 is faulty. If
continuity is present, winch
control valve assembly is
faulty.

YES

NO

Repair wire 3070 (para 2-40) or replace
winch control valve cable assembly
(para 7-85).

TM 9-2320-365-20-1

Change 2 2-961

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
winch out solenoid L5 terminal 2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3070
(para 2-40) or replace winch control valve
cable cable assembly (para 7-85).
(5) If continuity is present, replace winch control
valve assembly (para 17-6).
(6) Connect winch out solenoid L5 connector on
solenoid L5 and tighten screw.

TM 9-2320-365-20-1

2-962 Change 2

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION
Is continuity present between
WINCH IN/OUT switch
terminal 3 and terminal 7?

Continuity Test or
STE/ICE-R Test #91

Replace WINCH IN/OUT switch
(para 7-18).

3.

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT (CONT)

If continuity is not present,
WINCH IN/OUT switch is
faulty.

POSSIBLE PROBLEMS

Faulty WINCH IN/OUT switch.
Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

Circuit breaker OK.
11K self-recovery winch reels
in OK.
Winch control valve assembly
OK.

TM 9-2320-365-20-1

Change 2 2-963

CONTINUITY TEST

(1) Remove six screws from auxiliary
panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.
(3) Disconnect connector P903 from WINCH
IN/OUT switch.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
WINCH IN/OUT switch terminal 3.
(6) Connect negative (-) probe of multimeter to
WINCH IN/OUT switch terminal 7.
(7) Position WINCH IN/OUT switch to out
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If continuity is not present, replace
WINCH IN/OUT switch (para 7-18).

TM 9-2320-365-20-1

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT (CONT)

POSSIBLE PROBLEMS

Continuity Test or
STE/ICE-R Test #91

Is continuity present between
connector P903-7 and
connector P210-8?

2-964 Change 2

4.

Circuit breaker OK.
11K self-recovery winch reels
in OK.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.

Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.
Faulty auxiliary panel cable
assembly.

If continuity is not present,
wire 2008 is faulty.

Repair wire 2008 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-965

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P210 from connector
J210.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P903-7.
(5) Connect negative (-) probe of multimeter to
connector P210-8 and note reading on
multimeter.
(6) If continuity is not present, repair wire 2008
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch (para 7-49).
(7) Connect connector P903 to WINCH IN/OUT
switch.
(8) Position auxiliary panel on
auxiliary panel housing with six screws.
(9) Tighten six screws to 24 lb-in. (3 N∙m).

TM 9-2320-365-20-1

KNOWN INFO

YES

NO

TEST OPTIONS

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT (CONT)

5.

2-966 Change 2

Is continuity present between
connector J210-8 and
connector P215-1?

Continuity Test or
STE/ICE-R Test #91

Circuit breaker OK.
11K self-recovery winch reels
in OK.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.

POSSIBLE PROBLEMS

Faulty winch control valve
cable assembly.
Faulty PTO cable assembly.

Repair wire 2008 (para 2-40) or
replace PTO cable assembly (para 7-77).

REASON FOR QUESTION

If continuity is not present,
wire 2008 is faulty.

TM 9-2320-365-20-1

Change 2 2-967

CONTINUITY TEST

(1) Disconnect connector P215 from connector
J215.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J210-8.
(4) Connect negative (-) probe of multimeter to
connector P215-1 and note reading on
multimeter.
(5) If continuity is not present, repair wire 2008
(para 2-40) or replace PTO cable assembly
(para 7-77.
(6) Connect connector P210 to connector J210.
(7) Install kick panel (para 16-3).

TM 9-2320-365-20-1

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION

e87. 11K SELF-RECOVERY WINCH DOES NOT PAY OUT (CONT)

6.

2-968 Change 2

POSSIBLE PROBLEMS

Notify DS Maintenance.

Continuity Test or
STE/ICE-R Test #91
Circuit breaker OK.
11K self-recovery winch reels
in OK.
Winch control valve assembly
OK.
WINCH IN/OUT switch OK.
Auxiliary panel cable assembly
OK.
PTO cable assembly OK.

Faulty winch control valve
cable assembly.

Is continuity present between
connector J215-1 and winch
out solenoid L5 connector
terminal 1.

Repair wire 2008 (para 2-40) or
replace winch control valve cable
assembly (para 7-85).

If continuity is not present, wire
2008 is faulty. If continuity is
present, notify DS Maintenance.

TM 9-2320-365-20-1

Change 2 2-969

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J215-1.
(3) Connect negative (-) probe of multimeter to
winch out solenoid L5 connector terminal 1
and note reading on multimeter.
(4) If continuity is not present, repair wire 2008
(para 2-40) or replace winch control valve
cable assembly (para 7-85).
(5) If continuity is present, notify DS Maintenance.
(6) Connect connector P215 to connector J215.
(7) Connect winch out solenoid L5 connector to
solenoid L5 and tighten screw.

e88. PTO DOES NOT OPERATE

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 78, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)
Wire, Relay Test (Item E-9, Appendix E)

TEST OPTIONS

Voltage Test or
STE/ICE-R Test #89

REASON FOR QUESTION

This question eliminates
possible problems and
determines where
troubleshooting continues.

1.

Is 24 VDC present at
connector P217-B?

WARNING
Read WARNING
on following page.

YES
Go to step 3 of this fault.

NO

TM 9-2320-365-20-1

KNOWN INFO

Circuit breaker OK.
Vehicle starts.

POSSIBLE PROBLEMS

Faulty PTO cable assembly.
Faulty PTO.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty PTO switch.
Faulty WTEC II VIM.
Faulty WTEC II relay SF02.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

2-970 Change 2

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

TM 9-2320-365-20-1

Change 2 2-971

(1) Disconnect connector P217 from PTO.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter to
connector P217-B.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Start engine (TM 9-2320-365-10).
(6) Position PTO switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, go to step 3 of this
fault.
(8) Position PTO switch to off
(TM 9-2320-365-10).
(9) Shut down engine (TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

POSSIBLE PROBLEMS

2.

Is continuity present at
connector P217-A?

YES

NO

Notify DS Maintenance.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Circuit breaker OK.
Vehicle starts.
Dashboard cable assembly OK.
Auxiliary panel cable assembly
OK.
PTO switch OK.
WTEC II VIM OK.
WTEC III relay K37 OK.
WTEC III transmission ECU OK.

Faulty PTO cable assembly.
Faulty PTO.

If continuity is not present,
wire 3068 is faulty. If
continuity is present, PTO is
faulty.

Repair wire 3068 (para 2-40) or replace
PTO cable assembly (para 7-77).

2-972 Change 2

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-973

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P217-A.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3068
(para 2-40) or replace PTO cable assembly
(para 7-77).
(5) If continuity is present, notify DS
Maintenance.
(6) Connect connector P217 to PTO.

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION
Is 24 VDC present at
connector P904-5?

Voltage Test or
STE/ICE-R Test #89

3.

WARNING
Read WARNING
on following page.

Circuit breaker OK.
Vehicle starts.
PTO OK.

POSSIBLE PROBLEMS
If 24 VDC is not present, wire
1925 is faulty.

Repair wire 1925 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

2-974 Change 2

Faulty auxiliary panel cable
assembly.
Faulty PTO switch.
Faulty dashboard cable
assembly.
Faulty PTO cable assembly.
Faulty WTEC II VIM.
Faulty WTEC II relay SF02.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

TM 9-2320-365-20-1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 2 2-975

(1) Remove six screws from auxiliary panel.
(2) Lift auxiliary panel from auxiliary panel
housing to gain access.
(3) Disconnect connector P904 from PTO
switch.
(4) Set multimeter to volts DC.
(5) Connect positive (+) probe of multimeter to
connector P904-5.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 VDC is not present, repair wire 1925
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49).
(9) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION

Replace PTO switch
(para 7-18).

4.

Is continuity present from
PTO switch terminal 5 to
terminal 1?

Continuity Test or
STE/ICE-R Test #91
Circuit breaker OK.
Vehicle starts.
PTO OK.

POSSIBLE PROBLEMS

Faulty PTO switch.
Faulty auxiliary panel cable
assembly.
Faulty dashboard cable
assembly.
Faulty PTO cable assembly.
Faulty WTEC II VIM.
Faulty WTEC II relay SF02.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

If continuity is not present,
PTO switch is faulty.

2-976 Change 2

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-977

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PTO switch terminal 5.
(3) Connect negative (-) probe of multimeter to
PTO switch terminal 1.
(4) Position PTO switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If continuity is not present, replace PTO
switch (para 7-18).
(6) Position PTO switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION

Repair wire 2019 (para 2-40) or replace
PTO cable assembly (para 7-77).

5.

Is continuity present from
connector P210-4 to
connector P217-B?

Continuity Test or
STE/ICE-R Test #91

2-978 Change 2

If continuity is not present,
wire 2019 is faulty.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.

POSSIBLE PROBLEMS

Faulty PTO cable assembly.
Faulty WTEC II VIM.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-979

(1) Remove kick panel (para 16-3).
(2) Disconnect connector P210 from connector
J210.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector P210-4.
(5) Disconnect connector P217 from PTO.
(6) Connect negative (-) probe of multimeter to
connector P217-B and note reading on
multimeter.
(7) If continuity is not present, repair wire 2019
(para 2-40) or replace PTO cable assembly
(para 7-77).
(8) Connect connector P217 to PTO.
(9) Connect connector P210 to connector J210.

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

YES

NO

TEST OPTIONS

REASON FOR QUESTION

Visual inspection

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 13 of this fault.

6.

Is vehicle equipped with
WTEC II transmission
controls?

2-980 Change 2

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

Faulty WTEC II VIM.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.
Faulty WTEC III relay K37.
Faulty WTEC III cab
transmission harness.
Faulty WTEC III transmission
ECU.

POSSIBLE PROBLEMS

TM 9-2320-365-20-1

(1) Check if vehicle is equipped with WTEC II
transmission ECU pushbutton shift selector.
(2) If transmission pushbutton shift selector is not
mounted with four screws and does not have a
filter cover, go to step 13.

Change 2 2-981

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

7.

Does PTO operate after
replacing WTEC II relay SF02?

Replace WTEC II VIM (para 8-6).

Operational Test

YES

NO

2-982 Change 2

If PTO operates after replacing
WTEC II relay SF02, WTEC II
relay SF02 is faulty. If
PTO does not operate after
replacing WTEC II relay SF02,
WTEC II VIM is faulty.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC II VIM.
Faulty WTEC II dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.

TM 9-2320-365-20-1

OPERATIONAL TEST

Change 2 2-983

(1) Remove WTEC II relay SF02 (para 8-6).
(2) Install new WTEC II relay SF02 (para 8-6).
(3) Start engine (TM 9-2320-365-10).
(4) Position PTO switch to on
(TM 9-2320-365-10-1).
(5) If PTO operates, replace WTEC II relay SF02
(para 8-6).
(6) If PTO does not operate, replace WTEC II
VIM (para 8-6).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

POSSIBLE PROBLEMS

Voltage Test or
STE/ICE-R Test #89

If 24 VDC is not present, wire
1925 is faulty.

NO

8.

Is 24 VDC present at
connector J913-5?

WARNING
Read WARNING
on following page.

Faulty WTEC II dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC II VIM OK.

2-984 Change 2

Repair wire 1925 (para 2-40) or replace
WTEC II dashboard cable assembly (para 7-10).

TM 9-2320-365-20-1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 2 2-985

(1) Remove personnel heater for access
(para 18-9).
(2) Disconnect connector J913 from connector
P913.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector J913-5.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, repair wire 1925
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).
(8) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

2-986 Change 2

9.

Is continuity present from
connector P904-1 to
connector P913-15?

NO

Repair wire 1904 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

Continuity Test or
STE/ICE-R Test #91

If continuity is not present,
wire 1904 is faulty.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC II VIM OK.

POSSIBLE PROBLEMS

Faulty auxiliary panel cable
assembly.
Faulty WTEC II dashboard cable
assembly.
Faulty WTEC II relay SF02.

TM 9-2320-365-20-1

Change 2 2-987

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P904-1.
(3) Connect negative (-) probe of multimeter to
connector P913-15 and note reading on
multimeter.
(4) If continuity is not present, repair wire 1904
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch (para 7-49).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC II VIM OK.

POSSIBLE PROBLEMS

Faulty WTEC II dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.

10.

Is continuity present from
connector J913-15 to
connector PX33-E3?

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

NO

Repair wire 1904 (para 2-40) or replace WTEC
II dashboard cable assembly (para 7-10).
YES

11.

Is continuity present from
connector PX33-E2 to
connector J913-14?

YES

NO

Repair wire 2019 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10).

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

KNOWN INFO

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC II VIM OK.

POSSIBLE PROBLEMS

Faulty WTEC II dashboard
cable assembly.
Faulty auxiliary panel
cable assembly.
Faulty WTEC II relay SF02.

If continuity is not present,
wire 1904 is faulty.

2-988 Change 2

If continuity is not present,
wire 2019 is faulty.

TM 9-2320-365-20-1

Change 2 2-989

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX33-E2.
(3) Connect negative (-) probe of multimeter to
connector J913-14 and note reading on
multimeter.
(4) If continuity is not present, repair wire 2019
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).
(5) Connect connector PX33 to WTEC II VIM.
(6) Tighten screw in connector PX33.

(1) Loosen screw in connector PX33.
(2) Disconnect connector PX33 from WTEC II
VIM.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
connector J913-15.
(5) Connect negative (-) probe of multimeter to
connector PX33-E3 and note reading on
multimeter.
(6) If continuity is not present, repair wire 1904
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

NO

YES

12.

Is continuity present from
connector P913-14 to
connector J210-4?

Replace WTEC II relay
SF02 (para 8-6).

Repair wire 2019 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

Continuity Test or
STE/ICE-R Test #91

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC II VIM OK.
WTEC II dashboard cable
assembly OK.

POSSIBLE PROBLEMS

Faulty auxiliary panel cable
assembly.
Faulty WTEC II relay SF02.

2-990 Change 2

If continuity is not present,
wire 2019 is faulty.

TM 9-2320-365-20-1

Change 2 2-991

CONTINUITY TEST

(1) Disconnect connector P210 from connector
J210.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P913-14.
(4) Connect negative (-) probe of multimeter to
connector J210-4 and note reading on
multimeter.
(5) If continuity is not present, repair wire 2019
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49).
(6) If continuity is present, replace WTEC II relay
SF02 (para 8-6).
(7) Connect connector P913 to connector J913.
(8) Connect connector J210 to connector P210.
(9) Install personnel heater (para 18-9).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

REASON FOR QUESTION

Repair wire 1925 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

Voltage Test or
STE/ICE-R Test #89

13.

WARNING
Read WARNING
on following page.

Is 24 VDC present at
connector J913-5?

2-992 Change 2

If 24 VDC is not present,
wire 1925 is faulty.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

TM 9-2320-365-20-1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

Change 2 2-993

(1) Remove personnel heater for access
(para 18-9).
(2) Disconnect connector J913 from connector
P913.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector J913-5.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 VDC is not present, repair wire 1925
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(8) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

14.

Is continuity present from
connector P904-1 to
connector P913-15?

Repair wire 1904 (para 2-40) or
replace auxiliary panel cable
assembly (all models except M1079
w/o winch) (para 7-49).

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty auxiliary panel cable
assembly.
Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

2-994 Change 2

If continuity is not present,
wire 1904 is faulty.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-995

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P904-1.
(3) Connect negative (-) probe of multimeter to
connector P913-15 and note reading on
multimeter.
(4) If continuity is not present, repair wire 1904
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

REASON FOR QUESTION

Continuity Test or
STE/ICE-R Test #91

15.

Is continuity present from
connector J913-15 to WTEC
III relay K37 terminal 30?

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

If continuity is not present,
wire 1904 is faulty.

Repair wire 1904 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

2-996 Change 2

TM 9-2320-365-20-1

Change 2 2-997

(1) Remove WTEC III relay K37 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector J913-15.
(4) Connect negative (-) probe of multimeter to
PDP, terminal 30, where WTEC III relay K37
was removed, and note reading on multimeter.
(5) If continuity is not present, repair wire 1904
(para 2-40) or replace WTEC III dashboard cable
assembly (para 7-11).
(6) Install WTEC III relay K37 in PDP.

CONTINUITY TEST

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

TEST OPTIONS

NO

YES

REASON FOR QUESTION

Voltage Test or
STE/ICE-R Test #89

This question eliminates
possible problems and
determines where
troubleshooting continues.

Go to step 18 of this fault.

16.

WARNING
Read WARNING
on following page.
KNOWN INFO

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty auxiliary panel cable
assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

2-998 Change 2

Is 24 VDC present at WTEC
III relay K37 terminal 87?

TM 9-2320-365-20-1

Change 2 2-999

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Install personnel heater hoses (para 18-9).
(2) Remove PTO switch from auxiliary panel.
(3) Install PTO switch on connector P904.
(4) Remove WTEC III relay K37 from PDP.
(5) Insert relay test wire in PDP, terminal 87,
where WTEC III relay K37 was removed.
(6) Install WTEC III relay K37 in PDP.
(7) Set multimeter to volts dc.
(8) Connect positive (+) probe of multimeter to
relay test wire.
(9) Connect negative (-) probe of multimeter to
ground.
(10) Start engine (TM 9-2320-365-10).
(11) Position PTO switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(12) If 24 vdc is not present, go to step 18 of
this faulty.
(13) Position PTO switch to off
(TM 9-2320-365-10).
(14) Shut down engine (TM 9-2320-365-10).
(15) Remove WTEC III relay relay K37 from PDP.
(16) Remove relay test wire from PDP.
(17) Install WTEC III relay K37 in PDP.

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

NO

YES

REASON FOR QUESTION

POSSIBLE PROBLEMS

Repair wire 2019 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

Repair wire 2019 (para 2-40) or replace
auxiliary panel cable assembly (all models
except M1079 w/o winch) (para 7-49).

Continuity Test or
STE/ICE-R Test #91

17.

Is continuity present from
connector P913-14 to
connector J210-4?

2-1000 Change 2

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.
WTEC III relay K37 OK.
WTEC III transmission ECU OK.

Faulty auxiliary panel cable
assembly.
Faulty WTEC III dashboard
cable assembly.

If continuity is not present,
wire 2019 is faulty.

TM 9-2320-365-20-1

CONTINUITY TEST

Change 2 2-1001

(1) Disconnect connector P210 from connector
J210.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector P913-14.
(4) Connect negative (-) probe of multimeter to
connector J210-4 and note reading on
multimeter.
(5) If continuity is not present, repair wire 2019
(para 2-40) or replace auxiliary panel cable
assembly (all models except M1079 w/o
winch) (para 7-49).
(6) If continuity is present, repair wire 2019
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(7) Connect connector P913 to connector J913.
(8) Remove PTO switch from connector P904.
(9) Install personnel heater (para 18-9).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

YES

REASON FOR QUESTION

NO

18.

Is continuity present from
WTEC III relay K37 terminal
85 to ground?

Continuity Test or
STE/ICE-R Test #91

If continuity is not present, wire
3101 faulty.

Repair wire 3101 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

2-1002 Change 2

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO switch OK.
PTO cable assembly OK.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

TM 9-2320-365-20-1

Change 2 2-1003

CONTINUITY TEST

(1) Remove WTEC III relay K37 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
PDP, terminal 85, where WTEC III relay K37
was removed.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If continuity is not present, repair wire 3101
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

YES

REASON FOR QUESTION

POSSIBLE PROBLEMS

NO

19.

Repair wire 118 (para 2-40) or
replace WTEC III dashboard cable
assembly (para 7-11).

Is 24 VDC present on
connector P115-13?

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

2-1004 Change 2

If 24 VDC is not present, wire
118 is faulty.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO cable assembly OK.
Auxiliary panel cable assembly
OK.
PTO switch OK.

Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

TM 9-2320-365-20-1

Change 2 2-1005

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Disconnect connector clamp from
connector P115.
(2) Disconnect connector P115 from WTEC III
transmission ECU.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
connector P115-13.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10).
(7) Position PTO switch to on
(TM 9-2320-365-10) and note reading
on multimeter.
(8) If 24 VDC is not present, repair wire 118
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(9) Position PTO switch to off
(TM 9-2320-365-10).
(10) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

YES

REASON FOR QUESTION

NO

20.

Repair wire 112 (para 2-40) or
replace WTEC III dashboard
cable assembly (para 7-11).

Continuity Test or
STE/ICE-R Test #91

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO cable assembly OK.
Auxiliary panel cable assembly
OK.
PTO switch OK.

POSSIBLE PROBLEMS

Faulty WTEC III dashboard
cable assembly.
Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

2-1006 Change 2

If continuity is not present,
wire 112 is faulty.

Is continuity present from
connector P115-22 to
WTEC III relay K37 terminal
86?

TM 9-2320-365-20-1

Change 2 2-1007

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positve (+) probe of multimeter to
connector P115-22.
(3) Connect negative (-) probe of multimeter to
PDP, terminal 86, where WTEC III relay K37
was removed, and note reading on
multimeter.
(4) If continuity is not present, repair wire 112
(para 2-40) or replace WTEC III dashboard
cable assembly (para 7-11).
(5) Connect connector P115 to WTEC III
transmission ECU.
(6) Connect connector clamp on connector
P115.

TM 9-2320-365-20-1

e88. PTO DOES NOT OPERATE (CONT)

KNOWN INFO
TEST OPTIONS

YES

REASON FOR QUESTION

NO

Replace WTEC III relay
K37 (para 7-9).

Replace WTEC III transmission
ECU (para 8-7).

21.

WARNING
Read WARNING
on following page.

Voltage Test or
STE/ICE-R Test #89

Is 24 VDC present on WTEC
III relay K37 terminal 86?

2-1008 Change 2

POSSIBLE PROBLEMS

If 24 VDC is not present,
WTEC III transmission ECU is
faulty. If 24 VDC is present,
WTEC III relay K37 is faulty.

Faulty WTEC III relay K37.
Faulty WTEC III transmission
ECU.

Circuit breaker OK.
Vehicle starts.
PTO OK.
PTO cable assembly OK.
Auxiliary panel cable assembly
OK.
PTO switch OK.
WTEC III dashboard cable
assembly OK.

TM 9-2320-365-20-1

Change 2 2-1009

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Set multimeter to volts DC.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 86, where WTEC III relay K37
was removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If 24 VDC is not present, replace WTEC III
transmission ECU (para 8-7).
(5) If 24 VDC is present, replace WTEC III relay
K37 (para 7-9).
(6) Install WTEC III relay K37 on PDP.
(7) Remove PTO switch from connector P904.
(8) Install personnel heater (para 18-9).

TEST OPTIONS

REASON FOR QUESTION

If battery(ies) is unserviceable,
12 vdc circuits will not operate.

KNOWN INFO

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE

POSSIBLE PROBLEMS

1.

Are batteries serviceable?

WARNING
Read WARNING
on following page.

START

NO

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.

YES
Charge battery(ies) (TM 9-6140-200-14)
or replace battery(ies) (para 7-46).

Faulty battery(ies).
Faulty engine oil pressure
switch.
Faulty relay K11.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty alternator ground strap.
Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

Battery Specific Gravity Test

TM 9-2320-365-20-1

2-1010 Change 1

INITIAL SETUP

Equipment Conditions
Engine shut down (TM 9-2320-365-10).

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)
Wire, Relay Test (Item 9, Appendix E)
Nut, Self-Locking (Item 131.1, Appendix G) (100 AMP)
Nut, Self-Locking (Item 130.1, Appendix G) (200 AMP)

References
TM 9-6140-200-14
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Apron, Rubber (Item 3, Appendix C)
Gloves, Rubber (Item 13, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Tester, Antifreeze and Battery (Item 41, Appendix C)
Wrench, Torque, 0-200 lb-in. (Item 58, Appendix C)

Personnel Required
(2)

BATTERY SPECIFIC GRAVITY TEST

(1) Remove battery box cover from battery box
(TM 9-2320-365-10).
(2) Remove four batteries from battery box
(para 7-46).
(3) Test batteries for serviceability (TM 9-6140-
200-14).
(4) Replace battery(ies) if unserviceable (TM 9-
6140-200-14).
(5) Install four batteries in battery box (para 7-
46).
(6) Install battery box cover on battery box
(TM 9-2320-365-10).

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.
Batteries can explode from a spark. Battery
acid is harmful to skin and eyes. Always wear
eye protection and rubber gloves when working
with batteries.

WARNING

Change 1 2-1011

TM 9-2320-365-20-1

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

POSSIBLE PROBLEMS

KNOWN INFO
2.

Does engine oil pressure
indicator light go out before
the OIL PRESS gage reaches
20 PSI?

YES

NO

TEST OPTIONS

REASON FOR QUESTION

Visual Inspection
Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.

Faulty engine oil pressure
switch.
Faulty relay K11.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty alternator ground strap.
Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

If oil pressure indicator light
remains illuminated, oil
pressure switch is faulty.

Replace engine oil pressure
switch (para 7-40).

TM 9-2320-365-20-1

2-1012 Change 1

(1) Start engine (TM 9-2320-365-10).
(2) If engine oil pressure indicator light remains on
after OIL PRESS gage reaches 20 PSI, replace
engine oil pressure switch (para 7-40).
(3) Shut down engine (TM 9-2320-365-10).

Change 1 2-1013

TM 9-2320-365-20-1

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

TEST OPTIONS

REASON FOR QUESTION

If continuity is not present,
relay K11 is faulty.

3.
KNOWN INFO

Is continuity present from
relay K11 terminal 30 to
terminal 87A?

POSSIBLE PROBLEMS

Replace relay K11 (para 7-9).
YES

NO

Faulty relay K11.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty alternator ground strap.
Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-1014 Change 1

(1) Disconnect batteries (para 7-48).
(2) Remove power distribution panel (PDP)
cover (para 16-2).
(3) Remove relay K11 from power distribution
panel (PDP).
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
relay K11 terminal 30.
(6) Connect negative (-) probe of multimeter to
relay K11 terminal 87A and note reading on
multimeter.
(7) If continuity is not present, replace relay
K11 (para 7-9).

CONTINUITY TEST

Change 1 2-1015

TM 9-2320-365-20-1

4.
TEST OPTIONS

REASON FOR QUESTION

NO

YES

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

Go to step 9 of this fault.

KNOWN INFO

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty alternator ground strap.
Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

Continuity Test or
STE/ICE-R Test #91

This question eliminates
possible problems and
determines where
troubleshooting continues.

Is continuity present from
relay K11 socket 87A on
PDP to terminal lug TL35?

TM 9-2320-365-20-1

2-1016 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter
to relay K11 socket 87A on PDP.
(3) Raise cab (TM 9-2320-365-10).
(4) Lift dust boot on terminal lug TL35.
(5) Remove self-locking nut, washer, and
terminal lug TL35 from voltage regulator.
Discard self-locking nut.
(6) Connect negative (-) probe of multimeter to
terminal lug TL35 and note reading on
multimeter.
(7) If continuity is not present, go to step 9
of this fault.
(8) Position terminal lug TL35 on voltage
regulator with washer and self-locking nut.
(9) Tighten self-locking nut to 23-27 lb-in.
(3 N.m).
(10) Position dust boot on terminal lug TL35.

CONTINUITY TEST

Change 1 2-1016.1

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

NO

Is continuity present from
terminal lug TL58 to
ground?

5.

REASON FOR QUESTION
If continuity is not present,
alternator ground strap is
faulty.

YES

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

Replace alternator ground strap
(para 7-64).

POSSIBLE PROBLEMS

Faulty alternator ground strap.
Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.
Dashboard cable assembly OK.
Engine control cable assembly
OK.

Continuity Test or
STE/ICE-R Test #91

TM 9-2320-365-20-1

2-1016.2 Change 1

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
terminal lug TL58.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, replace
alternator ground strap (para 7-64).
(5) Connect batteries (para 7-48).

CONTINUITY TEST

Change 1 2-1016.3

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

Is 12 VDC present at
terminal lug TL60?

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

Voltage Test or
STE/ICE-R Test #89
Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.
Dashboard cable assembly OK.
Engine control cable assembly
OK.
Alternator ground strap OK.

POSSIBLE PROBLEMS

Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 12 vdc
cable.
Faulty 200 AMP alternator to
terminal block 12 VDC cable.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

6.

If 12 VDC is not present,
100 AMP alternator to reverse
polarity relay 12 VDC cable or
200 AMP alternator to terminal
block 12 VDC cable is faulty.

YES

Replace 100 AMP alternator to reverse
polarity relay 12 VDC cable (para 7-65)
or replace 200 AMP alternator to terminal
block 12 VDC cable (para 20-59).

NO

TM 9-2320-365-20-1

2-1016.4 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Raise cab (TM 9-2320-365-10).
(2) Lift dust boot from terminal lug TL60.
(3) Set multimeter to volts DC.
(4) Connect positive (+) probe of multimeter to
terminal lug TL60.
(5) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(6) If 12 VDC is not present, replace 100 AMP
alternator to reverse polarity relay 12 VDC
cable (para 7-65) or replace 200 AMP
alternator to terminal block 12 VDC
cable (para 20-59).
(7) Position dust boot on terminal lug TL60.

Change 1 2-1016.5

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

YES

WARNING
Read WARNING
on following page.
7.

NO

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

Voltage Test or
STE/ICE-R Test #89

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.
Dashboard cable assembly OK.
Engine control cable assembly
OK.
Alternator ground strap OK.
100 AMP alternator to reverse
polarity relay 12 vdc cable OK.
200 AMP alternator to terminal
block 12 VDC cable OK.

POSSIBLE PROBLEMS

Faulty alternator.
Faulty voltage regulator.
Faulty 100 AMP alternator to
reverse polarity relay 24 VDC
cable.
Faulty 200 AMP alternator to
terminal block 24 VDC cable.

Replace 100 AMP alternator to reverse
polarity relay 24 VDC cable (para 7-66) or
replace 200 AMP alternator to terminal
block 24 VDC cable (para 20-61).

If 24 VDC is not present,
100 AMP alternator to reverse
polarity relay 24 VDC cable or
200 AMP alternator to terminal
block 24 VDC cable is faulty.

Is 24 VDC present at
terminal lug TL2?

TM 9-2320-365-20-1

2-1016.6 Change 1

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

WARNING

(1) Lift dust boot from terminal lug TL2.
(2) Set multimeter to volts DC.
(3) Connect positive (+) probe of multimeter
to terminal lug TL2.
(4) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(5) If 24 VDC is not present, replace 100 AMP
alternator to reverse polarity relay 24 VDC
cable (para 7-66) or replace 200 AMP
alternator to terminal block 12 VDC
cable (para 20-61).
(6) Position dust boot on terminal lug TL2.
(7) Disconnect batteries (para 7-48).
(8) Lower cab (TM9-2320-365-10).
(9) Install relay K11 in PDP.
(10) Install PDP cover (para 16-2).
(11) Connect batteries (para 7-48).

Change 1 2-1016.7

TM 9-2320-365-20-1

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

Voltage Test or
STE/ICE-R Test #89

8.

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.
Dashboard cable assembly OK.
Engine control cable assembly
OK.
Alternator ground strap OK.
100 AMP alternator to reverse
polarity relay 12 vdc cable OK.
200 AMP alternator to terminal
block 12 VDC cable OK.
100 AMP alternator to reverse
polarity relay 24 VDC cable
OK.
200 AMP alternator to terminal
block 24 VDC cable OK.

Faulty alternator.
Faulty voltage regulator.

POSSIBLE PROBLEMS

Is the alternator output
within normal voltage range
for both 12 VDC and 24
VDC terminal studs with
a known good voltage
regulator?

TM 9-2320-365-20-1

2-1016.8 Change 1

With a known good voltage
regulator installed; if the
voltage regulator output is not
within normal range, the
alternator is faulty. If the
voltage regulator output is
within normal range, the
previous voltage regulator is
faulty.

YES

NO

Replace 100 AMP alternator (para 7-2)
or 200 AMP alternator (para 20-56).

Replace 100 AMP voltage regulator
(para 7-5) or 200 AMP voltage
regulator (para 20-57).

WARNING

VOLTAGE TEST

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuits
and cause severe burns or electrical shock.

(1) Replace 100 AMP voltage regulator (para
7-5) or 200 AMP voltage regulator (para
20-57) with a known good voltage
regulator.
(2) Start engine (TM 9-2320-365-10).
(3) Raise cab (TM 9-2320-365-10).
(4) Lift dust boot from alternator 12 VDC
terminal stud.
(5) Set multimeter to volts DC.
(6) Connect positive (+) probe of multimeter
to alternator 12 VDC terminal stud.
(7) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(8) If 13.25 -14.75V is not present, replace
100 AMP alternator (para 7-2) or 200 AMP
alternator (para 20-56).
(9) If 13.25-14.75V is present, replace 100
AMP voltage regulator (para 7-5) or 200
AMP voltage regulator (para 20-57).
(10) Position dust boot on alternator 12 VDC
terminal stud.
(11) Lift dust boot from alternator 24 VDC
terminal stud.
(12) Connect positive (+) probe of multimeter to
alternator 24 VDC terminal stud.
(13) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(14) If 27.25 -28.75V is not present, replace 100
AMP alternator (para 7-2) or 200 AMP
alternator (para 20-56).
(15) If 27.25-28.75V is present, replace 100 AMP
voltage regulator (para 7-5) or 200 AMP
voltage regulator (para 20-57).
(16) Position dust boot on alternator 24 VDC
terminal stud.
(17) Lower cab (TM 9-2320-365-10).
(18) Shut down engine (TM 9-2320-365-10).

Change 1 2-1016.9

TM 9-2320-365-20-1

e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)

YES

NO

TM 9-2320-365-20-1

2-1016.10 Change 1

CAUTION
Read CAUTION
on following page.
9.

Is continuity present from
relay K11 terminal 87A on
PDP to connector J31
pin 1?

KNOWN INFO

Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R Test #91

REASON FOR QUESTION

Repair wire 568A from connector
J31 pin 1 to relay K11 terminal 87A
on PDP (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable assembly
(para 7-11).

Repair wire 568A from connector
P31 socket 1 to terminal lug TL35 (para
2-40) or replace engine control cable
assembly (para 7-72).

If continuity is not present,
wire 568A from connector J31
pin 1 to relay K11 terminal
87A on PDP is faulty. If
continuity is present , wire
568A from connector P31
socket 1 to terminal lug TL35
is faulty.

CONTINUITY TEST

Change 1 2-1017

TM 9-2320-365-20-1

Inspect connector pins/sockets for damage,
corrosion, and serviceability. Check that
connector pins are not pushed back and
are capable of making good contact.

NOTE

Use care when testing electrical connectors.
Do not damage connector pins or sockets
with multimeter probes. Failure to comply
may result in damage to equipment.

CAUTION

(1) Lower cab (TM 9-2320-365-10).
(2) Remove instrument panel for access
(para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter
to relay K11 terminal 87A on PDP.
(6) Connect negative (-) probe of multimeter to
connector J31 pin 1 and note reading on
multimeter.
(7) If continuity is not present, repair wire
568A from connector J31 pin 1 to relay
K11 terminal 87A (para 2-40) on PDP or
replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
(8) If continuity is present, repair wire 568A
from connector P31 socket 1 to terminal
lug TL35 (para 2-40) or replace engine
control cable assembly (para 7-72).
(9) Connect connector J31 to connector P31.
(10) Install instrument panel (para 7-15).
(11) Install relay K11 in PDP.
(12) Install PDP cover (para 16-2).
(13) Connect batteries (para 7-48).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1018
2-1018
2-1018
2-1018
2-1018

START

1.

YES

NO

Is continuity present
between connector J115-24
and connector J116C3?

INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Repair wire 158 (para 2-40) or
replace WTEC II cab transmission
harness (para 7-86).

KNOWN INFO

Marker lights illuminate.
Blackout lights
illuminate.
WTEC II TEPSS
illuminates.

POSSIBLE PROBLEMS

Faulty WTEC II cab
transmission harness.
Faulty WTEC II VIM.
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.

If continuity is not present,
wire 158 is faulty.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1019
2-1019
2-1019
2-1019
2-1019

CONTINUITY TEST
(1) Remove kick panel (para 16-3).
(2) Disconnect connector J116 from WTEC II VIM.
(3) Remove instrument panel assembly for access
(para 7-15).
(4) Disconnect connector J115 (top connector) from
WTEC II TEPSS.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector J115-24.
(7) Connect negative (-) probe of multimeter to
connector J116C3.
(8) If continuity is not present, repair wire 158
(para 2-40) or replace WTEC II cab transmission
harness (para 7-86).
(9) Connect connector J115 to WTEC II TEPSS.
(10) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1020
2-1020
2-1020
2-1020
2-1020

2.

NO

YES

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
Is continuity present
between WTEC II VIM
connector J116C3
and WTEC II VIM
connector terminal J3?

If continuity is not present,
WTEC II VIM is faulty.

Marker lights illuminate.
Blackout lights illuminate.
WTEC II TEPSS
illuminates.
WTEC II cab transmission
harness OK.

POSSIBLE PROBLEMS

Faulty WTEC II VIM.
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.

Replace WTEC II
VIM (para 8-6).

e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
(CONT)
(CONT)
(CONT)
(CONT)
(CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1021
2-1021
2-1021
2-1021
2-1021

CONTINUITY TEST

(1) Loosen screw and disconnect connector
PX33 from WTEC II VIM.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
WTEC II VIM connector J116C3.
(4) Connect negative (-) probe of multimeter to
WTEC II VIM connector terminal J3 and note
reading on multimeter.
(5) If continuity is not present, replace WTEC II
VIM (para 8-6).
(6) Connect connector J116 to WTEC II VIM.
(7) Connect connector PX33 to WTEC II VIM and
tighten screw.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1022
2-1022
2-1022
2-1022
2-1022

3.

NO

YES

If continuity is not present,
wire 158 is faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
Is continuity present
between connector
J7-4 and ground?

Marker lights illuminate.
Blackout lights illuminate.
WTEC II TEPSS
illuminates.
WTEC II VIM OK.
WTEC II cab transmission
harness OK.

POSSIBLE PROBLEMS

Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.
Repair wire 158 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10).

e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
(CONT)
(CONT)
(CONT)
(CONT)
(CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1023
2-1023
2-1023
2-1023
2-1023

CONTINUITY TEST

(1) Remove three screws and washers from PDP.
(2) Remove three screws from PDP.
(3) Lift PDP outward to gain access.
(4) Disconnect connector J7 from WTEC II ECU
dimmer module.
(5) Set multimeter to ohms.
(6) Connect positive (+) probe of multimeter to
connector J7-4.
(7) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(8) If continuity is not present, repair wire 158
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1024
2-1024
2-1024
2-1024
2-1024

4.

NO

YES

If continuity is not present,
wire 1426 is faulty.

NO

YES

5.

Is continuity present
between connector J7-2
and a known good
ground?

If continuity is not present,
wire 1408 is faulty.

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

Is continuity present
between connector J7-1
and a known good
ground?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Marker lights illuminate.
Blackout lights illuminate.
WTEC II TEPSS
illuminates.
WTEC II cab transmission
harness OK.
WTEC II VIM OK.
POSSIBLE PROBLEMS
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.
Repair wire 1426 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10).

Marker lights illuminate.
Blackout lights illuminate.
WTEC II TEPSS
illuminates.
WTEC II cab transmission
harness OK.
WTEC II VIM OK.

POSSIBLE PROBLEMS

Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.
Repair wire 1408 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10).

e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
(CONT)
(CONT)
(CONT)
(CONT)
(CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1025
2-1025
2-1025
2-1025
2-1025

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J7-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 1426
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J7-2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 1408
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1026
2-1026
2-1026
2-1026
2-1026

NO

YES

6.

Is continuity present
between connector J7-3
and a known good
ground?

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
wire 3099 is faulty. If
continuity is present,
WTEC II ECU dimmer
module is faulty.

Marker lights illuminate.
Blackout lights illuminate.
WTEC II TEPSS
illuminates.
WTEC II cab transmission
harness OK.
WTEC II VIM OK.
POSSIBLE PROBLEMS
Faulty WTEC II dashboard
cable assembly.
Faulty WTEC II ECU
dimmer module.
Repair wire 3099 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10).

Replace WTEC II ECU
dimmer module (para 7-13).

e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
e90. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) ILLUMINATION DOES NOT DIM
(CONT)
(CONT)
(CONT)
(CONT)
(CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1027
2-1027
2-1027
2-1027
2-1027

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J7-3.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3099
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10).
(5) If continuity is present, replace WTEC II
ECU dimmer module (para 7-13).
(6) Connect connector J7 to WTEC II ECU dimmer
module.
(7) Install PDP on dashboard with three screws.
(8) Install three washers and screws in PDP.
(9) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1028
2-1028
2-1028
2-1028
2-1028

START

1.

If continuity is not present,
water temperature switch
is faulty.

YES

NO

Continuity Test
STE/ICE-R #91

KNOWN INFO

POSSIBLE PROBLEMS

Faulty water temperature
switch.
Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.

TEST OPTIONS

REASON FOR QUESTION

Engine fan turns off using
deep water fording switch.
Is continuity present
between water temperature
switch connector
terminal 1 and terminal 2?

e91. ENGINE FAN RUNS CONSTANTLY
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Replace water temperature
switch (para 7-42).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1029
2-1029
2-1029
2-1029
2-1029

CONTINUITY TEST

NOTE
Engine must be cool during test.

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector clamp from water
temperature switch connector.
(3) Disconnect connector P36 from water
temperature switch connector.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to water
temperature switch connector terminal 1.
(6) Connect negative (-) probe of multimeter to water
temperature switch connector terminal 2 and
note reading on multimeter.
(7) If continuity is not present, replace water
temperature switch (para 7-42).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1030
2-1030
2-1030
2-1030
2-1030

YES

NO

2.

POSSIBLE PROBLEMS

KNOWN INFO

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

WARNING
Read WARNING
on following page.

Is 24 vdc present at
connector P36-2?

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 4 of this fault.

YES

NO

POSSIBLE PROBLEMS

KNOWN INFO

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TEST OPTIONS

REASON FOR QUESTION

3.
Continuity Test or
STE/ICE-R #91

Go to step 5 of this fault.

Fault corrected.

This question eliminates
possible problems and
determines where
troubleshooting continues.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Engine fan turns off using
deep water fording switch.
Water temperature switch
OK.

Engine fan turns off using
deep water fording switch.
Water temperature switch
OK.

Is continuity present
between connector P36-1?

e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1031
2-1031
2-1031
2-1031
2-1031

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P36-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, go to step 5 of this
fault.
(5) If continuity is present, fault corrected.
(6) Connect connector P36 to water temperature
switch connector.
(7) Connect connector clamp on water
temperature switch connector.

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
connector P36-2.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, go to step 4 of this
fault.
(6) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1032
2-1032
2-1032
2-1032
2-1032

YES

NO

4.
KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

WARNING
Read WARNING
on following page.

Is 24 vdc present at
connector J31-3?

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION
If 24 vdc is not present,
wire 1807 in dashboard
cable assembly is faulty.
If 24 vdc is present, wire
1807 in engine control
cable assembly is faulty.

Engine fan turns off using
deep water fording switch.
Water temperature switch
OK.

Repair wire 1807 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly
(para 7-11).

Repair wire 1807 (para 2-40)
or replace engine control cable
assembly (para 7-72).

e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1033
2-1033
2-1033
2-1033
2-1033

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST

(1) Lower cab (TM 9-2320-365-10).
(2) Remove instrument panel assembly for access
(para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter to
connector J31-3.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1807
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(9) If 24 vdc is present, repair wire 1807
(para 2-40) or replace engine control cable
assembly (para 7-72).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Connect connector J31 to connector P31.
(12) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1034
2-1034
2-1034
2-1034
2-1034

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TEST OPTIONS

REASON FOR QUESTION

5.

WARNING
Read WARNING
on following page.

Is 24 vdc present at
connector J31-4?

Voltage Test or
STE/ICE-R #91

If 24 vdc is not present,
wire 1806 in dashboard
cable assembly is faulty.
If 24 vdc is present,
wire 1806 in engine
control cable assembly
is faulty.

Engine fan turns off using
radiator fan off switch.
Water temperature switch
OK.

Repair wire 1806 (para 2-40)
or replace WTEC II dashboard
cable assembly (para 7-10) or
WTEC III dashboard cable
assembly (para 7-11).

Repair wire 1806 (para 2-40)
or replace engine control cable
assembly (para 7-72).

e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)
e91. ENGINE FAN RUNS CONSTANTLY (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1035
2-1035
2-1035
2-1035
2-1035

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Lower cab (TM 9-2320-365-10).
(2) Remove instrument panel assembly for access
(para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter to
connector J31-4.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, repair wire 1806
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(9) If 24 vdc is present, repair wire 1806
(para 2-40) or replace engine control cable
assembly (para 7-72).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Connect connector J31 to connector P31.
(12) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1036
2-1036
2-1036
2-1036
2-1036

1.

START

YES

NO

Circuit breaker OK.

Is 24 vdc present at
connector PX34-1?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Faulty dashboard cable
assembly.
Faulty fan solenoid.
Faulty fan clutch.
Faulty radiator fan off
switch.

Go to step 4 of this fault.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1037
2-1037
2-1037
2-1037
2-1037

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove kick panel (para 16-3).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect wire 1807 from terminal board TB1
terminal 38.
(6) Disconnect connector PX34 from fan solenoid
JX34.
(7) Set multimeter to volts dc.
(8) Connect positive (+) probe of multimeter to
connector PX34-1.
(9) Connect negative (-) probe of multimeter to
ground.
(10) Position master power switch to on
(TM 9-2320-365-10).
(11) Position radiator fan off switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(12) If 24 vdc is not present, go to step 4 of this
fault.
(13) Position radiator fan off switch to off
(TM 9-2320-365-10).
(14) Position master power switch to off
(TM 9-2320-365-10).
(15) Connect wire 1807 to terminal board TB1
terminal 38.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1038
2-1038
2-1038
2-1038
2-1038

YES

NO

2.

Is continuity present
between connector PX34-2
and a known good ground?
If continuity is not present,
wire 3011 is faulty.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty fan solenoid.
Faulty fan clutch.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

NO

3.

If fan solenoid does not
release air pressure to
engine fan, fan solenoid is
faulty.

Does fan solenoid release
air pressure to radiator fan?

Operational Test

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty fan solenoid.
Faulty fan clutch.

Circuit breaker OK.
Radiator fan off
switch OK.

Repair wire 3011 (para 2-40) or
replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Circuit breaker OK.
Radiator fan off
switch OK.
Dashboard cable
assembly OK.

Replace fan solenoid
(para 7-23).

Replace fan clutch
(para 6-14).

e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1039
2-1039
2-1039
2-1039
2-1039

CONTINUITY TEST

OPERATIONAL TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector PX34-2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3011
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) Connect connector PX34 to fan solenoid.

(1) Remove air hose from fan solenoid.
(2) Start engine (TM 9-2320-365-10) and allow
air pressure to build up to normal level.
(3) Position radiator fan off switch to on
(TM 9-2320-365-10).
(4) If air pressure is not present, replace
fan solenoid (para 7-23).
(5) If air pressure is present, replace fan clutch
(para 6-14).
(6) Position radiator fan off switch to off
(TM 9-2320-365-10).
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Connect wire 1807 to terminal board TB1
terminal 38.
(9) Install PDP on dashboard with three screws.
(10) Install three washers and screws in PDP.
(11) Install air hose on fan solenoid.
(12) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1040
2-1040
2-1040
2-1040
2-1040

4.

NO

YES

5.

If 24 vdc is not present,
wire 1935 is faulty.

NO

YES

KNOWN INFO

Circuit breaker OK.
Fan solenoid OK.
Fan clutch OK.

POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Circuit breaker OK.
Fan solenoid OK.
Fan clutch OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Is 24 vdc present at
terminal board TB1
terminal 37?
Faulty dashboard cable
assembly.
Faulty radiator fan off
switch.

Faulty radiator fan off
switch.
Faulty dashboard cable
assembly.

Repair wire 1935 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace radiator fan
off switch (para 7-18).

If continuity is not present,
radiator fan off switch
is faulty.

Is continuity present
between radiator fan
off switch terminal
5 and terminal 1?

e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1041
2-1041
2-1041
2-1041
2-1041

WARNING

Remove rings, bracelets, watches, necklaces,
and any other jewelry before working around
vehicle. Jewelry can catch on equipment and
cause injury or short across electrical circuit
and cause severe burns or electrical shock.

VOLTAGE TEST

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
terminal board TB1 terminal 37.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, repair wire 1935
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position master power switch to off
(TM 9-2320-365-10).
(7) Install PDP on dashboard with three screws.
(8) Install three washers and screws in PDP.
(9) Install kick panel (para 16-3).

(1) Remove instrument panel assembly for
access (para 7-15).
(2) Disconnect connector PX1 from radiator fan
off switch.
(3) Position radiator fan off switch to on
(TM 9-2320-365-10).
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
radiator fan off switch terminal 5.
(6) Connect negative (-) probe of multimeter to
radiator fan off switch terminal 1.
(7) If continuity is not present, replace radiator fan
off switch (para 7-18).
(8) Position radiator fan off switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1042
2-1042
2-1042
2-1042
2-1042

NO

6.
KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.

Voltage Test or
STE/ICE-R #91

If 24 vdc is not present, wire
1806 in dashboard cable
assembly is faulty. If 24
vdc is present, wire 1806
in engine control cable
assembly is faulty.

YES

Is 24 vdc present at
connector J31-4?

Engine fan turns off using
radiator fan off switch.
Water temperature switch
OK.

Repair wire 1812 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1806 (para 2-40)
or replace engine control cable
assembly (para 7-72).

e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)
e92. ENGINE FAN DOES NOT TURN OFF USING RADIATOR FAN OFF SWITCH (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1043
2-1043
2-1043
2-1043
2-1043

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Lower cab (TM 9-2320-365-10).
(2) Remove instrument panel assembly for
access (para 7-15).
(3) Disconnect connector J31 from connector
P31.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter
to connector J31-4.
(6) Connect negative (-) probe of multimeter
to ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading
on multimeter.
(8) If 24 vdc is not present, repair wire 1806
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(9) If 24 vdc is present, repair wire 1806
(para 2-40) or replace engine control cable
assembly (para 7-72).
(10) Position master power switch to off
(TM 9-2320-365-10).
(11) Connect connector J31 to connector P31.
(12) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1044
2-1044
2-1044
2-1044
2-1044

1.

START

YES

NO

Is 24 vdc present at
connector J93-1?
This question eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

Circuit breaker OK.
Ether cylinder OK.
POSSIBLE PROBLEMS

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 3 of this fault.

Faulty start and charging
cable assembly.
Faulty ether valve.
Faulty ether start switch.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

e93. ETHER START DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).
Spare tire lowered (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1045
2-1045
2-1045
2-1045
2-1045

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Disconnect connector clamp from ether valve
connector.
(2) Disconnect ether valve connector
from connector J93.
(3) Disconnect connector clamp from ether sensor
connector.
(4) Disconnect connector P42 from ether sensor
connector.
(5) Install jumper wire from connector P42-1 to
connector P42-2.
(6) Set multimeter to volts dc.
(7) Connect positive (+) probe of multimeter to
connector J93-1.
(8) Connect negative (-) probe of multimeter to
ground.
(9) Position master power switch to on
(TM 9-2320-365-10).
(10) Press ether start switch (TM 9-2320-365-10)
and note reading on multimeter.
(11) If 24 vdc is not present, go to step 3 of this
fault.
(12) Release ether start switch
(TM 9-2320-365-10).
(13) Position master power switch to off
(TM 9-2320-365-10).
(14) Remove jumper wire from connector P42-1 and
connector P42-2.
(15) Connect connector P42 to ether sensor
connector.
(16) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1046
2-1046
2-1046
2-1046
2-1046

REASON FOR QUESTION

YES

NO

2.

Is continuity present
between connector J93-2
and a known good ground?

Circuit breaker OK.
Ether cylinder OK.
Ether start switch OK.
Dashboard cable
assembly OK.
Engine control cable
assembly OK.

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

YES

NO

3.

If continuity is not present,
ether start switch is faulty.

KNOWN INFO

POSSIBLE PROBLEMS
Faulty ether start switch.
Faulty dashboard cable
assembly.
Faulty engine control
cable assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

If continuity is not present,
wire 3014 is faulty. If
continuity is present,
ether valve is faulty.

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.

Is continuity present
between ether start switch
terminal 1 and terminal 3?

Faulty start and charging
cable assembly.
Faulty ether valve.
Repair wire 3014 (para 2-40)
or replace start and charging
cable assembly (para 7-82).

Replace ether valve
(para 4-15).

Replace ether start
switch (para 7-18).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1047
2-1047
2-1047
2-1047
2-1047

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J93-2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3014
(para 2-40) or replace start and charging cable
assembly (para 7-82).
(5) If continuity is present, replace ether valve
(para 4-15).
(6) Raise spare tire (TM 9-2320-365-10).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector PX13 from ether start
switch.
(3) Set multimeter to ohms.
(4) Connect positive (+) probe of multimeter to
ether start switch terminal 1.
(5) Connect negative (-) probe of multimeter to
ether start switch terminal 3.
(6) Position ether start switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If continuity is not present, replace ether
start switch (para 7-18).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1048
2-1048
2-1048
2-1048
2-1048

4.

Is 24 vdc present at
connector PX13-1?
If 24 vdc is not present,
wire 1401 is faulty.

YES

NO

WARNING
Read WARNING
on following page.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

YES

NO

5.
KNOWN INFO

POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

Is continuity present from
connector J31-2 to
connector PX13-3?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
wire 1402 is faulty.

Circuit breaker OK.
Ether cylinder OK.
Start and charging
cable assembly OK.
Ether valve OK.
Ether start switch OK.

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.

Repair wire 1401 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1402 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1049
2-1049
2-1049
2-1049
2-1049

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
connector PX13-1.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, repair wire 1401
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position master power switch to off
(TM 9-2320-365-10).

(1) Disconnect connector P31 from connector
J31.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
connector PX13-3.
(4) Connect negative (-) probe of multimeter to
connector J31-2 and note reading on
multimeter.
(5) If continuity is not present, repair wire 1402
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1050
2-1050
2-1050
2-1050
2-1050

6.

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS
Faulty engine control
cable assembly.
Faulty ether sensor.
Faulty dashboard cable
assembly.

Is continuity present
between connector P31-2
and connector P42-2?

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
wire 1402 is faulty.

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.

Repair wire 1402 (para 2-40)
or replace engine control
cable assembly (para 7-72).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1051
2-1051
2-1051
2-1051
2-1051

CONTINUITY TEST

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector P42 from ether sensor
connector.
(3) Connect jumper wire to connector P42-2.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
connector P31-2.
(6) Connect negative (-) probe of multimeter to
jumper wire and note reading on multimeter.
(7) If continuity is not present, repair wire 1402
(para 2-40) or replace engine control cable
assembly (para 7-72).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1052
2-1052
2-1052
2-1052
2-1052

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

7.

POSSIBLE PROBLEMS
Faulty engine control
cable assembly.
Faulty ether sensor.

If continuity is not present,
ether sensor is faulty.

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.
Dashboard cable
assembly OK.

Is continuity present
between ether senor
terminal 1 and terminal 2?

Replace ether sensor
(para 7-39).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1053
2-1053
2-1053
2-1053
2-1053

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
ether sensor terminal 1.
(3) Connect negative (-) probe of multimeter to
ether sensor terminal 2 and note reading on
multimeter.
(4) If continuity is not present, replace ether
sensor (para 7-39).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1054
2-1054
2-1054
2-1054
2-1054

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

POSSIBLE PROBLEMS
Faulty engine control
cable assembly.
Faulty ether sensor.

8.

Is continuity present
between connector P42-1
and connector P31-15?

If continuity is not present,
wire 1403 is faulty.

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.
Dashboard cable
assembly OK.

Repair wire 1403 (para 2-40)
or replace engine control
cable assembly (para 7-72).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1055
2-1055
2-1055
2-1055
2-1055

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect jumper wire to connector P42-1.
(3) Lower cab (TM 9-2320-365-10).
(4) Connect positive (+) probe of multimeter to
connector P31-15.
(5) Connect negative (-) probe of multimeter to
jumper wire and note reading on multimeter.
(6) If continuity is not present, repair wire 1403
(para 2-40) or replace engine control cable
assembly (para 7-72).
(7) Raise cab (TM 9-2320-365-10).
(8) Remove jumper wire from connector P42.
(9) Connect connector P42 to ether sensor
connector.
(10) Connect connector clamp on ether sensor
connector.
(11) Lower cab (TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1056
2-1056
2-1056
2-1056
2-1056

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

POSSIBLE PROBLEMS
Faulty engine control
cable assembly.
Faulty ether sensor.

If continuity is not present,
wire 1403 is faulty.

9.

Is continuity present
between connector
J31-15 and connector
J43-1?

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.
Dashboard cable
assembly OK.

Repair wire 1403 (para 2-40)
or replace engine control
cable assembly (para 7-72).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1057
2-1057
2-1057
2-1057
2-1057

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J31-15.
(3) Connect negative (-) probe of multimeter to
connector J43-1 and note reading on multimeter.
(4) If continuity is not present, repair wire 1403
(para 2-40) or replace engine control cable
assembly (para 7-72).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1058
2-1058
2-1058
2-1058
2-1058

YES

NO

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

POSSIBLE PROBLEMS
Faulty engine control
cable assembly.
Faulty ether sensor.

If continuity is not present,
wire 1403 is faulty.

10.

Is continuity present
between connector
P43-1 and connector
J93-1?

Circuit breaker OK.
Ether cylinder OK.
Start and charging cable
assembly OK.
Ether valve OK.
Ether start switch OK.
Dashboard cable
assembly OK.

Repair wire 1403 (para 2-40)
or replace engine control
cable assembly (para 7-72).

Replace ether sensor
(para 7-39).

e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)
e93. ETHER START DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1059
2-1059
2-1059
2-1059
2-1059

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect jumper wire to connector J93-1.
(3) Connect positive (+) probe of multimeter to
connector P43-1.
(4) Connect negative (-) probe of multimeter to
jumper wire and note reading on multimeter.
(5) If continuity is not present, repair wire 1403
(para 2-40) or replace engine control cable
assembly (para 7-72).
(6) If continuity is present, replace ether sensor
(para 7-39).
(7) Remove jumper wire from connector J93.
(8) Connect connector J93 to ether valve
connector.
(9) Connect connector clamp to ether valve
connector.
(10) Connect connector J43 to connector P43.
(11) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1060
2-1060
2-1060
2-1060
2-1060

1.

START

Is 24 vdc present
on connector P33-2?

YES

NO

WARNING
Read WARNING
on following page.

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION
This question eliminates
possible problems and
determines where to
continue troubleshooting.

Go to step 3 of this fault.

Engine starts.

POSSIBLE PROBLEMS

Faulty engine control cable
assembly.
Faulty dashboard cable
assembly.
Faulty fuel/water
separator.

Voltage Test or
STE/ICE-R #89

e94. EXCESSIVE CONDENSATION IN FUEL
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1061
2-1061
2-1061
2-1061
2-1061

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Raise cab (TM 9-2320-365-10).
(2) Disconnect connector clamp from fuel/water
separator.
(3) Disconnect connector P33 from fuel/water
separator.
(4) Set multimeter to volts dc.
(5) Connect positive (+) probe of multimeter to
connector P33-2.
(6) Connect negative (-) probe of multimeter to
ground.
(7) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(8) If 24 vdc is not present, go to step 3 of this
fault.
(9) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1062
2-1062
2-1062
2-1062
2-1062

YES

NO

2.

Is continuity present
between connector P33-1
and a known good ground?
If continuity is not present,
wire 3017 is faulty. If
continuity is present,
fuel/water separator is
faulty.

KNOWN INFO

Engine starts.
Dashboard cable
assembly OK.

Faulty engine control cable
assembly.
Faulty fuel/water
separator.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

Engine starts.
Fuel/water separator OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.

3.

Is 24 vdc present
on connector J31-13?

Voltage Test or
STE/ICE-R #89

WARNING
Read WARNING
on following page.

If 24 vdc is not present,
wire 1460 in dashboard
cable assembly is faulty.
If 24 vdc is present,
wire 1460 in engine
control cable assembly
is faulty.

Repair wire 3017 (para 2-40)
or replace engine control
cable assembly (para 7-72).

Replace fuel/water
separator (para 4-13).

Repair wire 1460 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1460 (para 2-40)
or replace engine control
cable assembly (para 7-72).

e94. EXCESSIVE CONDENSATION IN FUEL (CONT)
e94. EXCESSIVE CONDENSATION IN FUEL (CONT)
e94. EXCESSIVE CONDENSATION IN FUEL (CONT)
e94. EXCESSIVE CONDENSATION IN FUEL (CONT)
e94. EXCESSIVE CONDENSATION IN FUEL (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1063
2-1063
2-1063
2-1063
2-1063

CONTINUITY TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

VOLTAGE TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P33-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3017
(para 2-40) or replace engine control cable
assembly (para 7-72).
(5) If continuity is present, replace fuel/water
separator (para 4-13).
(6) Connect connector P33 to fuel/water
separator.
(7) Connect connector clamp on fuel/water
separator.
(8) Lower cab (TM 9-2320-365-10).

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector P31 from connector
J31.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector J31-13.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1460
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) If 24 vdc is present, repair wire 1460
(para 2-40) or replace engine control cable
assembly (para 7-72).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector P31 to connector J31.
(11) Install instrument panel assembly on (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1064
2-1064
2-1064
2-1064
2-1064

1.

START

YES

NO

Circuit breaker OK.

Is 12 vdc present on
connector J78-3?
This step eliminates
possible problems and
determines where
troubleshooting continues.

KNOWN INFO

POSSIBLE PROBLEMS

Faulty relay K53.
Faulty dashboard cable
assembly.
Faulty radio.

WARNING
Read WARNING
on following page.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

Go to step 4 of this fault.

e95. RADIO DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1065
2-1065
2-1065
2-1065
2-1065

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove kick panel (para 16-3).
(2) Disconnect connector J78 from radio.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector J78-3.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 12 vdc is not present, go to step 4 of
this fault.
(8) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1066
2-1066
2-1066
2-1066
2-1066

YES

NO

2.

3.

Is continuity present
between connector J78-2
and a known good ground?
If continuity is not present,
wire 3018 is faulty.

YES

NO

Is continuity present
between connector J78-4
and a known good ground?
If continuity is not present,
wire 3019 is faulty. If
continuity is present, radio
is faulty.

KNOWN INFO

Circuit breaker OK.
Relay K53 OK.

Faulty dashboard cable
assembly.
Faulty radio.

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

Circuit breaker OK.
Relay K53 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty radio.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Replace radio (notify
Communications Section).

Repair wire 3018 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 3019 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1067
2-1067
2-1067
2-1067
2-1067

CONTINUITY TEST

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J78-2.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3018
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector J78-4.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3019
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace radio
(notify Communications Section).
(6) Connect connector J78 to radio.
(7) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1068
2-1068
2-1068
2-1068
2-1068

YES

NO

4.

5.

If continuity is not present,
relay K53 is faulty.

If 24 vdc is not present,
wire 1960 is faulty. If
24 vdc is present,
wire 1906 is faulty.

YES

NO

Is 24 vdc present at
relay K53 terminal 85?

KNOWN INFO

Circuit breaker OK.
Radio OK.

POSSIBLE PROBLEMS

Faulty relay K53.
Faulty dashboard cable
assembly.

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

KNOWN INFO

Circuit breaker OK.
Radio OK.
Relay K53 OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.

TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

WARNING
Read WARNING
on following page.

Is continuity present
between relay K53
terminals 30 and 87A?

Replace relay K53
(para 7-9).

Repair wire 1960 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1906 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)
e95. RADIO DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1069
2-1069
2-1069
2-1069
2-1069

CONTINUITY TEST

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST

(1) Remove relay K53 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
relay K53 terminal 30.
(4) Connect negative (-) probe of multimeter to
relay K53 terminal 87A and note reading on
multimeter.
(5) If continuity is not present, replace relay K53
(para 7-9).

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K53 was
removed.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, repair wire 1960
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(6) If 24 vdc is present, repair wire 1906
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(7) Position master power switch to off
(TM 9-2320-365-10).
(8) Install relay K53 in PDP.
(9) Connect connector J78 to radio.
(10) Install kick panel (para 16-3).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1070
2-1070
2-1070
2-1070
2-1070

1.

START

YES

NO

KNOWN INFO

POSSIBLE PROBLEMS

TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

Engine will start after start
inhibit pushbutton switch
is pressed.

Faulty start inhibit
pushbutton switch.
Faulty dashboard cable
assembly.
Faulty relay K19.

If continuity is not present,
start inhibit pushbutton
switch is faulty.

Is continuity present
between start inhibit
pushbutton switch
terminal 2 and terminal 1?

e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Materials/Parts
Wire, Elect, 50 ft (Item 77, Appendix D)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

Replace start inhibit pushbutton
switch (para 7-19).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1071
2-1071
2-1071
2-1071
2-1071

CONTINUITY TEST

(1) Remove PDP cover (para 16-2).
(2) Remove three screws and washers from PDP.
(3) Remove three screws from PDP.
(4) Lift PDP outward to gain access.
(5) Disconnect terminal lugs TL158 and TL159
from start inhibit pushbutton switch.
(6) Set multimeter to ohms.
(7) Connect positive (+) probe of multimeter to
start inhibit pushbutton switch terminal 1.
(8) Connect negative (-) probe of multimeter to
start inhibit pushbutton switch terminal 2.
(9) Press start inhibit pushbutton switch and hold
(TM 9-2320-365-10) and note reading on
multimeter.
(10) If continuity is not present, replace start
inhibit pushbutton switch (para 7-19).
(11) Install PDP on dashboard with three screws.
(12) Install three washers and screws in PDP.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1072
2-1072
2-1072
2-1072
2-1072

YES

NO

2.

3.

Is 24 vdc present on
terminal lug TL159?
If 24 vdc is not present,
wire 1463 is faulty.

YES

NO

Is continuity present
between terminal lug TL158
and relay K19 terminal 86?
If continuity is not present,
wire 1637 is faulty.

KNOWN INFO
TEST OPTIONS
Voltage Test or
STE/ICE-R #89

REASON FOR QUESTION

KNOWN INFO
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION

WARNING
Read WARNING
on following page.
Engine will start after start
inhibit pushbutton switch
is pressed.
Start inhibit pushbutton
switch OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K19.

Engine will start after start
inhibit pushbutton switch
is pressed.
Start inhibit pushbutton
switch OK.
Wire 1463 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K19.

Repair wire 1463 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1637 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1073
2-1073
2-1073
2-1073
2-1073

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

VOLTAGE TEST

CONTINUITY TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
terminal lug TL159.
(3) Connect negative (-) probe of multimeter to
ground.
(4) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(5) If 24 vdc is not present, repair wire 1463
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Position master power switch to off
(TM 9-2320-365-10).

(1) Remove relay K19 from PDP.
(2) Set multimeter to ohms.
(3) Connect positive (+) probe of multimeter to
terminal lug TL158.
(4) Connect negative (-) probe of multimeter to
PDP, terminal 86, where relay K19 was
removed, and note reading on multimeter.
(5) If continuity is not present, repair wire 1637
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(6) Connect terminal lugs TL158 and TL159 to
start inhibit pushbutton switch.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1074
2-1074
2-1074
2-1074
2-1074

YES

NO

Is continuity present
between relay K19
terminal 85 and a known
good ground?

KNOWN INFO
4.
TEST OPTIONS

Continuity Test or
STE/ICE-R #91

REASON FOR QUESTION
If continuity is not present,
wire 3016 is faulty. If
continuity is present, relay
K19 is faulty.

Engine will start after start
inhibit pushbutton switch
is pressed.
Start inhibit pushbutton
switch OK.
Wire 1463 OK.
Wire 1637 OK.

POSSIBLE PROBLEMS

Faulty dashboard cable
assembly.
Faulty relay K19.
Repair wire 3016 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Replace relay K19
(para 7-9).

e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)
e96. START INHIBIT PUSHBUTTON DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1075
2-1075
2-1075
2-1075
2-1075

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
PDP, terminal 85, where relay K19 was
removed.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3016
(para 2-40) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
(5) If continuity is present, replace relay K19
(para 7-9).
(6) Install relay K19 in PDP.
(7) Install PDP cover (para 16-2).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1076
2-1076
2-1076
2-1076
2-1076

1.

START

YES

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

POSSIBLE PROBLEMS

Faulty air dryer.
Faulty dashboard
cable assembly.
Faulty start and charging
cable assembly.

Is 24 vdc present on
connector P80-2?

Go to step 3 of this fault.

This question eliminates
possible problems and
determines where
troubleshooting continues.

Voltage Test or
STE/ICE-R #89

Air hoses and fittings OK.
Air compressor
governor OK.

e97. AIR DRYER DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)

References
TM 9-4910-571-12&P

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1077
2-1077
2-1077
2-1077
2-1077

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Disconnect connector P80 from air dryer
connector.
(2) Set multimeter to volts dc.
(3) Connect positive (+) probe of multimeter to
connector P80-2.
(4) Connect negative (-) probe of multimeter to
ground.
(5) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(6) If 24 vdc is not present, go to step 3 of
this fault.
(7) Position master power switch to off
(TM 9-2320-365-10).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1078
2-1078
2-1078
2-1078
2-1078

YES

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

2.

Is continuity present
from connector P80-1
to ground?
If continuity is not present,
wire 3009 is faulty. If
continuity is present, air
dryer is faulty.

POSSIBLE PROBLEMS

Faulty air dryer.
Faulty start and charging
cable assembly.

Continuity Test or
STE/ICE-R #91

Air hoses and fittings OK.
Air compressor
governor OK.
Dashboard cable
assembly OK.

Repair wire 3009 (para 2-40)
or replace start and charging
cable assembly (para 7-82).

Replace or repair air dryer
(para 23-6).

e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1079
2-1079
2-1079
2-1079
2-1079

CONTINUITY TEST

(1) Set multimeter to ohms.
(2) Connect positive (+) probe of multimeter to
connector P80-1.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If continuity is not present, repair wire 3009
(para 2-40) or replace start and charging
cable assembly (para 7-82).
(5) If continuity is present, replace or repair
air dryer (para 23-6).
(6) Connect connector P80 to air dryer connector.

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1080
2-1080
2-1080
2-1080
2-1080

YES

WARNING
Read WARNING
on following page.

NO

KNOWN INFO
TEST OPTIONS

REASON FOR QUESTION

3.

Is 24 vdc present on
connector J43-9?
If 24 vdc is not present,
wire 1481 in dashboard
cable assembly is faulty.
If 24 vdc is present,
wire 1481 in start and
charging cable assembly
is faulty.

POSSIBLE PROBLEMS

Faulty dashboard
cable assembly.
Faulty start and charging
cable assembly.

Voltage Test or
STE/ICE-R #89

Air hoses and fittings OK.
Air compressor
governor OK.
Air dryer OK.

Repair wire 1481 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).

Repair wire 1481 (para 2-40)
or replace start and charging
cable assembly (para 7-82).

e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)
e97. AIR DRYER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1081
2-1081
2-1081
2-1081
2-1081

VOLTAGE TEST

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock.

WARNING

(1) Remove instrument panel assembly for access
(para 7-15).
(2) Disconnect connector J43 from connector P43.
(3) Set multimeter to volts dc.
(4) Connect positive (+) probe of multimeter to
connector J43-9.
(5) Connect negative (-) probe of multimeter to
ground.
(6) Position master power switch to on
(TM 9-2320-365-10) and note reading on
multimeter.
(7) If 24 vdc is not present, repair wire 1481
(para 2-40) or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III dashboard
cable assembly (para 7-11).
(8) If 24 vdc is present, repair wire 1481
(para 2-40) or replace start and charging
cable assembly (para 7-82).
(9) Position master power switch to off
(TM 9-2320-365-10).
(10) Connect connector J43 to connector P43.
(11) Install instrument panel assembly (para 7-15).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1082
2-1082
2-1082
2-1082
2-1082

1.

START

YES

NO

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS

REASON FOR QUESTION

Vehicle starts.

POSSIBLE PROBLEMS

Faulty fuse.
Faulty battery tester.

Is continuity present
across battery tester
fuse?

Continuity Test or
STE/ICE-R #91

If continuity is not present,
battery tester fuse is
faulty.

e98. BATTERY TESTER DOES NOT OPERATE
INITIAL SETUP

Equipment Condition
Engine shut down (TM 9-2320-365-10).

Personnel Required
(2)

References
TM 9-4910-571-12&P

Tools and Special Tools
STE/ICE-R (Item 39, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Gloves, Rubber (Item 13, Appendix C)
Apron, Rubber (Item 3, Appendix C)

Replace fuse
(para 7-45).

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock. Batteries
can explode from a spark. Battery
acid is harmful to skin and eyes.
Always wear eye protection and
rubber gloves when working with
batteries.

CONTINUITY TEST

(1) Remove battery box cover (TM 9-2320-365-10).
(2) Open fuse holder on battery tester.
(3) Remove fuse from fuse holder.
(4) Set multimeter to ohms.
(5) Connect positive (+) probe of multimeter to
one end of fuse.
(6) Connect negative (-) probe of multimeter to
other end of fuse and note reading on
multimeter.
(7) If continuity is not present, replace battery
tester 3 milliamp fuse (para 7-45).

2-1083
2-1083
2-1083
2-1083
2-1083

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

2-1084
2-1084
2-1084
2-1084
2-1084

NO

KNOWN INFO

WARNING
Read WARNING
on following page.

TEST OPTIONS

REASON FOR QUESTION

Vehicle starts.
Fuse OK.

POSSIBLE PROBLEMS

Faulty battery tester.

2.

Is 24 vdc present from
right side of fuse holder
to ground?

Voltage Test or
STE/ICE-R #89

YES

If 24 vdc is not present,
wire from fuse holder to
BT2-E1 is faulty.

Repair wire from fuse
holder to BT2-E1 (para 2-40)
or replace battery tester
(para 7-45).

Replace battery
tester (para 7-45).

e98. BATTERY TESTER DOES NOT OPERATE (CONT)
e98. BATTERY TESTER DOES NOT OPERATE (CONT)
e98. BATTERY TESTER DOES NOT OPERATE (CONT)
e98. BATTERY TESTER DOES NOT OPERATE (CONT)
e98. BATTERY TESTER DOES NOT OPERATE (CONT)

TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1
TM 9-2320-365-20-1

WARNING

Remove rings, bracelets, watches,
necklaces, and any other jewelry
before working around vehicle.
Jewelry can catch on equipment
and cause injury or short across
electrical circuit and cause severe
burns or electrical shock. Batteries
can explode from a spark. Battery
acid is harmful to skin and eyes.
Always wear eye protection and
rubber gloves when working with
batteries.

VOLTAGE TEST

(1) Set multimeter to volts dc.
(2) Connect positive (+) probe of multimeter to
terminal in right side of fuse holder.
(3) Connect negative (-) probe of multimeter to
ground and note reading on multimeter.
(4) If 24 vdc is not present, repair wire from right
side of fuse holder to BT2-E1 (para 2-40) or
replace battery tester (para 7-45).
(5) If 24 vdc is present, replace battery tester
(para 7-45).
(6) Install fuse in battery tester fuse holder.
(7) Close battery tester fuse holder.
(8) Install battery box cover (TM 9-2320-365-10).

2-1085/(2-1086 Blank)
2-1085/(2-1086 Blank)
2-1085/(2-1086 Blank)
2-1085/(2-1086 Blank)
2-1085/(2-1086 Blank)

APPENDIX A
REFERENCES

A-1. SCOPE

This appendix lists all forms, field manuals, technical manuals, and other publications referenced in this manual. Those
publications that should be consulted for additional information about vehicle operations are also listed.

A-2. PUBLICATIONS INDEX

The following index should be consulted frequently for latest changes or revisions and for new publications relating to
material covered in this technical manual.

Consolidated Index of Army Publications and Blank Forms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 25-30

A-3. FORMS

The following forms pertain to this manual. See DA Pam 25-30 for index of blank forms. See DA Pam 738-750, The
Army Maintenance Management System (TAMMS), for instructions on the use of maintenance forms pertaining to this
material.

Equipment Control Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DA Form 2408-9
Equipment Inspection and Maintenance Worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Form 2404
Maintenance Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Form 2407
Packaging Improvement Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DD Form 6
Processing and Deprocessing Record of Shipping, Storage, and Issue of Vehicles and
Spare Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DD Form 1397
Product Quality Deficiency Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SF 368
Recommended Changes to DA Publications and Blank Forms . . . . . . . . . . . . . . . . . . . . . . . . . .
DA Form 2028-2
Report of Item Discrepancy (ROID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SF 364

A-4. OTHER PUBLICATIONS

The following publications contain information pertinent to the LMTV and associated equipment.

a. Safety.

First Aid for Soldiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 21-11
Security of Tactical Wheeled Vehicles
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 9-2300-422-20
Safety Inspection and Testing of Lifting Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0142

A-1

TM 9-2320-365-20-1

TM 9-2320-365-20-1

A-4. OTHER PUBLICATIONS (CONT)

b. LMTV.

Direct Support and General Support Maintenance Manual for M1078 Series, 2 1/2-Ton,
4x4, Light Medium Tactical Vehicle (LMTV)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-365-34
Hand Receipt Covering Contents of Components of End Item (COEI), Basic Issue
Items (BII), and Additional Authorization List (AAL), for M1078 Series, 2 1/2-Ton,
4x4, Light Medium Tactical Vehicles (LMTV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-365-10-HR
Operator’s Manual for M1078 Series, 2 1/2-Ton, 4x4, Light Medium Tactical Vehicle
(LMTV)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-365-10
Unit, Direct Support, and General Support Repair Parts and Special Tools List for
M1078 Series, 2 1/2-Ton, 4x4, Light Medium Tactical Vehicle (LMTV) . . . . . . . . . . . . . . . . . TM 9-2320-365-24P

Warranty Program for M1078 Series, 2 1/2-Ton, 4x4, Light Medium Tactical Vehicle
(LMTV)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 9-2300-365-15

c. General Vehicle Operation.

Army Motor Transport Units and Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 55-30
Deleted
Manual for the Wheeled Vehicle Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 21-305
Safety Prevention of Motor Vehicle Accidents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AR 385-55
Vehicle Recovery Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 20-22

d. General Maintenance and Repair.

Army Oil Analysis Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0211
Camouflage Pattern Painting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-20
Charging System Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DA Pam 750-33
Color, Marking, and Camouflage Painting of Military Vehicles
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0209
Cooling Systems: Tactical Vehicles
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 750-254
Corrosion Prevention and Control Including Rustproofing Procedures for Tactical
Vehicles and Trailers
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 43-0213
Description, Use, Bonding Techniques, and Properties of Adhesives
. . . . . . . . . . . . . . . . . . . . . . . TB ORD 1032
Equipment Improvement Report and Maintenance Digest: TACOM Equipment . . . . . . . . . . . . . . TB 43-0001-39-1
Equipment Improvement Report and Maintenance Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 43-0143
Installation Instructions for Installation Kit, Electronic Equipment,
MK-2700/VRC (NSN 5895-01-421-0814) (EIC: N/A) to Permit Installation
of Radio Set AN/VRC-87/88/90 Series into M1078, M1080, M1081, M1083-
M1086, M1088-M1094 and M1096 Family of Medium Tactical Vehicles . . . . . . . . . . . . . TB 11-5820-890-20-101
Installation Instructions for Installation Kit, Electronic Equipment,
MK-2715/VRC (NSN 5895-01-421-0812) (EIC: N/A) to Permit Installation
of Radio Set AN/VRC-89/91/92 Series into M1078, M1080, M1081, M1083-
M1086, M1088-M1094 and M1096 Family of Medium Tactical Vehicles . . . . . . . . . . . . . . TB 11-5820-890-20-92
Metal Body Repair and Related Operations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 43-2
Materials Used for Cleaning, Preserving, Abrading, and Cementing Ordnance Materiel
and Related Materials Including Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-247
Operator’s and Organizational Maintenance Manual for Radio Sets . . . . . . . . . . . . . . . . . . . . TM 11-5820-498-12
Operator’s and Organizational Maintenance Manual Including Repair Parts and
Special Tools List Simplified Test Equipment for Internal Combustion Engines
Reprogrammable (STE/ICE-R) (NSN 4910-01-222-6589) . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-4910-571-12&P
Operator’s Manual, Radio Set, AN/VRC-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-401-10-1

A-2
Change 1

TM 9-2320-365-20-1

Operator’s Manual, Radio Set, AN/VRC-90A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 11-5820-890-10-1
Operator’s, Unit, Direct Support, and General Support Maintenance Manual
for Lead-Acid Storage Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-6140-200-14
Ordnance Tracked and Wheeled Vehicle Hull and Chassis Wiring, Repair of
. . . . . . . . . . . . . . . . . . TB ORD 650
Organizational Care, Maintenance, and Repair of Pneumatic Tires and Inner Tubes . . . . . . . . . TM 9-2610-200-14
Painting Instructions for Field Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 43-0139
Purging, Cleaning, and Coating Interior Ferrous and Terne Sheet Vehicle Fuel Tanks . . . . . . . . . . . . . TB 43-0212
Repair of Tents, Canvas, and Webbing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 10-16
Rigging Techniques, Procedures, and Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-125

Use and Care of Hand Tools and Measuring Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-243
Use of Antifreeze Solutions and Cleaning Compounds in Engine Cooling Systems . . . . . . . . . . . . . . . TB 750-651
Welding Theory and Application
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TM 9-237

e. Cold Weather Operation.

Basic Cold Weather Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 31-70
Northern Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 31-71
Operation and Maintenance of Ordnance Materiel in Cold Weather (0° to -65°F) . . . . . . . . . . . . . . . . . .
FM 9-207

f. Decontamination.

Decontamination Operations Facilities & Equipment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB 700-4
NBC Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 3-4
NBC Decontamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 3-5

g. Maintenance of Special Purpose Kits.

Operator and Organizational Maintenance Manual for Chemical Alarm . . . . . . . . . . . . . . . . . . . TM 3-6665-225-12
Operator’s and Unit Maintenance Manual Including Repair Parts and Special Tools
List for Decontaminating Apparatus: M13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 3-4230-214-12&P
Operator’s, Organizational, Direct Support, and General Support Maintenance Manual
Including Repair Parts and Special Tools List for Various Machine Gun Mounts . . . . . . . . . . . TM 9-1005-245-14
Operator’s, Organizational, Direct Support, and General Support Maintenance
Manual, Air Conditioner, Horizontal Compact, 18,000 BTU/HR, 208 Volt, 3 Phase,
50/60 Hertz, Model F18H-3S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 5-4120-384-14
Unit and Direct Support Maintenance, Repair Parts and Special Tools List for
Heater, Space, Multifuel with Blower, 60,000 BTU/HR, 120V, Model UH-68G,
NSN 4520-01-203-4410, and Model UH-68GI, NSN 4520-01-297-6803
. . . . . . . . . . . . . . . . TM 5-4520-253-23P

h. General.

Operator’s Manual (M998 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-280-10
Operator’s Manual (M1008 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-289-10
Operator’s Manual (M35 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-361-10
Operator’s Manual (M939 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-2320-272-10
Principles of Automotive Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 9-8000
Procedures for Destruction of Tank-Automotive Equipment to Prevent Enemy Use
(US Army Tank-automotive and Armaments Command)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TM 750-244-6
Route Reconnaissance and Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM 5-36
Soldier’s Manual MOS 88M Motor Transport Operator, Skill Levels 1/2 . . . . . . . . . . . . . . . . . . STP 55-88-M12-SM

Change 1
A-3

A-4. OTHER PUBLICATIONS (CONT)

i. Land, Sea, and Air Shipment.

Airdrop of Supplies and Equipment: Rigging 2 1/2-Ton Trucks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FM 10-520
Containerization of Military Vehicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MTMCTEA Ref 95-55-23
Lifting and Tiedown of U.S. Military Helicopters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MTMCTEA Ref 95-55-21
Marine Lifting and Lashing Handbook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MTMCTEA Ref 95-55-22
Marine Terminal Lifting Guidance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MTMCTEA Pam 56-1
Multiservice Helicopter External Air Transport: Basic Operations and Equipment . . . . . . . . . . . . . . . . FM 55-450-3
Multiservice Helicopter External Air Transport: Dual-Point Load Rigging Procedures . . . . . . . . . . . . . FM 55-450-5
Multiservice Helicopter External Air Transport: Single-Point Load Rigging Procedures . . . . . . . . . . . . FM 55-450-4
Standard Characteristics (Dimensions, Weight, and Cube) for Transportability of Military
Vehicles and Other Outsize/Overweight Equipment (in TOE Line Sequence)
. . . . . . . . . . . . . . . . . .
TB 55-46-1
Tiedown Handbook for Rail Movements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MTMCTEA Pam 55-19
Tiedown Handbook for Truck Movements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MTMCTEA Ref 92-55-20

A-4

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Change 3 B-1

APPENDIX B
MAINTENANCE ALLOCATION CHART (MAC)
SECTION I
INTRODUCTION
B-1. The Army Maintenance System MAC.
a.This introduction (Section I) provides a general explanation of all maintenance and repair functions authorized at
various maintenance levels under the standard Army Maintenance System concept.
b.The Maintenance Allocation Chart (MAC) in Section II designates overall authority and responsibility for the
performance of maintenance functions on the identified end item or component. The application of the maintenance
functions to the end item or component will be consistent with the capacities and capabilities of the designated
maintenance levels, which are shown on the MAC in column (4) as:
Unit/Field - includes two subcolumns, C (Operator/Crew) and O (Unit) maintenance.
Direct Support/Field - includes an F subcolumn.
General Support/Sustainment - includes an H subcolumn.
Depot/Sustainment - includes a D subcolumn.
c.Section III lists the tools and test equipment (both special tools and common tool sets) required for each maintenance
function as referenced from Section II.
d.Section IV contains supplemental instructions and explanatory notes for a particular maintenance function.
B-2. Maintenance Functions. Maintenance functions are limited to and defined as follows:
a.Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical
characteristics with established standards through examination (e.g. by sight, sound, or feel).
b.Test. To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an
item and comparing those characteristics with prescribed standards.
c.Service. Operations required periodically to keep an item in proper operating condition; e.g. to clean (includes
decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemicals fluids, or gases.
d.Adjust. To maintain or regulate, within prescribed limits, by bringing into proper position, or by setting the operating
characteristics to specified parameters.
e.Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted on instruments or Test, Measurement,
and Diagnostic Equipment (TMDE) used in precision measurement. Consists of comparison of two instruments, one of
which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument
being compared.

TM 9-2320-365-20-1

B-2

g.Remove/Install. To remove and install the same item when required to perform service or other maintenance
functions. Install may be the act of emplacing, seating, or fixing into position a spare, repair part, or module (component
or assembly) in a manner to allow the proper functioning of an equipment or system.
h.Replace. To remove an unserviceable item and install a serviceable counterpart in its place. "Replace " is authorized
by the MAC and assigned maintenance level is shown as the 3d position code of the SMR code.
i. Repair. The application of maintenance services1 including fault location/troubleshooting2, removal/installation, and
disassembly/assembly3 procedures, and maintenance actions4 to identify troubles and restore serviceability to an item
by correcting specific damage, fault, malfunction, or failure in a part, subassembly, module (component or assembly),
end item, or system.
j. Overhaul. That maintenance effort (service/action) prescribed to restore an item to a completely
serviceable/operational condition as required by maintenance standards in appropriate technical publications (i.e.,
DMWR). Overhaul is normally the highest degree of maintenance performed by the Army. Overhaul does not normally
return an item to like new condition.
k.Rebuild. Consists of those services/actions necessary for the restoration of unserviceable equipment to a like new
condition in accordance with original manufacturing standards. Rebuild is the highest degree of material maintenance
applied to Army equipment. The rebuild operation includes the act of returning to zero those age measurements (e.g.,
hours/miles) considered in classifying Army equipment/components.
B-3. Explanation of Columns in the MAC, Section II.
a.Column 1, Group Number. Column 1 lists functional group code numbers, the purpose of which is to identify
maintenance significant components, assemblies, subassemblies, and modules with the next higher assembly.
b.Column 2, Component/Assembly. Column 2 contains the item names of components , assemblies, subassemblies,
and modules for which maintenance is authorized.
c.Column 3, Maintenance Function. Column 3 lists the functions to be performed on the items listed in Column 2.
(For detailed explanation of these functions, see Paragraph B-2.)
d.Column 4, Maintenance Level. Column 4 specifies each level of maintenance authorized to perform each function
listed in Column 3, by indicating work time required (expressed in man-hours in whole hours or decimals) in the
appropriate subcolumn. This work-time figure represents the active time required to perform that maintenance function at
the indicated level of maintenance. If the number or complexity of the tasks within the listed maintenance function vary at
different maintenance levels, appropriate work-time figures are to be shown for each level. The work-time figure
represents the average time required to restore an item (assembly, subassembly, component, module, end item, or
system) to a serviceable condition under typical field operating conditions.

1Services - Inspect, test, service, adjust, align calibrate, and/or replace.

2Fault location/troubleshooting - The process of investigating and detecting the cause of equipment malfunction; the act of
isolating a fault within a system or Unit Under Test (UUT).

3Disassembly/assembly - The step-by-step breakdown (taking apart) of a spare/functional group coded item, to the level of its
least component, that is assigned an SMR code for the level of maintenance under consideration (i.e., identified as maintenance
significant).

4Actions - Welding, grinding, riveting, straightening, facing, machining, and/or resurfacing.

TM 9-2320-365-20-1

Change 3 B-3

This time includes preparation time (including any necessary disassembly/assembly time), troubleshooting/fault location
time, and quality assurance time in addition to the time required to perform the specific tasks identified for the
maintenance functions authorized in the maintenance allocation chart. The symbol designations for the various
maintenance levels are as follows:
C ....................................................................................................................................... Operator or crew maintenance
O ....................................................................................................................................................Unit/Field maintenance
F....................................................................................................................................Direct Support/Field maintenance
L.................................................................................................................................. Specialized Repair Activity (SRA)5
H .................................................................................................................. General Support/Sustainment maintenance
D ....................................................................................................................................Depot/Sustainment maintenance
e.Column 5, Tools and Test Equipment Reference Code. Column 5 specifies, by code, those common tools sets
(not individual tools), common TMDE, and special tools, special TMDE, and special support equipment required to
perform the designated functions. Codes are keyed to tools and test equipment in Section III.
f. Column 6, Remarks. When applicable, this column contains a letter code, in alphabetical order, which is keyed to the
remarks contained in Section IV.
B-4. Explanation of Columns in Tool and Test Equipment Requirements, Section III.
a.Column 1, Reference Code. The tool and test equipment reference code correlates with a code used in the MAC,
Section II column 5.
b.Column 2, Maintenance Level. The lowest level of maintenance authorized to use the tool or test equipment.
c.Column 3, Nomenclature. Name or identification of the tool or test equipment.
d.Column 4, National Stock Number. The National Stock Number of tool or test equipment.
e.Column 5, Tool Number. The manufacturer's part number, model number, or type number.
B-5. Explanation of Columns in Remarks, Section IV.
a.Column 1, Remarks Code. The code recorded in column 6, Section II.
b.Column 2, Remarks. This column lists information pertinent to the maintenance function being performed as
indicated in the MAC, Section II.
5This maintenance level is not included in Section II, Column (4) of the Maintenance Allocation Chart. Functions to this level of
maintenance are identified by a work-time figure in the "H" column of Section II, Column (4), and an associated reference code is
used in the Remarks column (6). This code is keyed to Section IV, Remarks, and the SRA complete repair application is explained
there.

TM 9-2320-365-20-1

B-4 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE
(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

0100
ENGINE ASSEMBLY
Inspect
0.1
78

Test
1.5
0.3
78,79

Adjust
3.0
56,60,78,80

Service
0.8
57,59,78

Replace
7.0
16,56,59,61
,78,79

Repair
0.4
1.6
3.3
16,31,32,44
,56,59,60,6
1,78,79

0101
CYLINDER HEAD ASSEMBLY
Inspect
0.1
78

Replace
2.0
44,56,59,60
,78

Repair
2.5
56,59,60,61
,62,78,81

0102
CRANKSHAFT
Replace
16.0
56,57,60,71
,78

Repair
3.8
16.0
16,31,32,56
,59,60,61,7
8

0103
FLEXPLATE, ENGINE
Replace
6.5
56,59,78

Repair
1.0
56,49,78

0104
PISTON ASSEMBLY
Replace
9.0
56,57,59,60
,62,78,79

Repair
0.6
78

0105
CAMSHAFT ASSEMBLY
Replace
3.1
14,56,57,49
,60,78

Repair
1.2
56,78

0105
ROCKER ARM AND PUSH
RODS
Replace
2.0
44,59,60,61
,78

Repair
0.3
44,78

0106
COOLER, ENGINE OIL
Replace
1.3
56,78

Repair
0.3
56,78

0108
MANIFOLDS, INLET AND
EXHAUST
Replace
1.5
56,60,61,78
,79

0301
INJECTOR ASSEMBLY, FUEL
Replace
2.1
44,57,78,80

Adjust
1.6
56,78,79,80

0304
AIR INTAKE SYSTEM
Service
0.3

Repair
0.3
46,57

TM 9-2320-365-20-1

Change 3 B-5

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(4)
Maintenance Level

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

C
O
F
H
D

(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

0304
INTAKE AIR CLEANER
Service
0.2

Replace
0.8
6,46,57, 78

Repair
0.4
57,78

0305
TURBOCHARGER
Replace
0.8
56,61,78,79

0306
FUEL TANK
Inspect
0.1

Replace
1.5
57,59,78

0308
GOVERNOR, ENGINE SPEED
Replace
1.0
57,60,76,78
,79

Repair
0.5
0.7
57,78

0309
FILTER, FUEL/WATER
SEPARATOR
Inspect
0.2

Service
0.2
0.3
78

Replace
0.5
57,78

0311
ETHER STARTING AID
Replace
0.6
57,59,78

0312
ACCELERATOR/HAND
THROTTLE
Replace
0.5
57,78

Adjust
0.2
57,78

0401
EXHAUST MUFFLER/PIPES
Inspect
0.1
0.2

Replace
0.9
57,59,78

0501
RADIATOR/CHARGE AIR
COOLER
Inspect
0.1

Replace
2.5
2,27,53,
59,78

Service
1.5
59,79

Repair
0.6
2.0
2,27,53,
59,78

0501
RADIATOR OVERFLOW TANK Replace
0.5
46,57,78

Repair
0.3
78

0502
SHROUD, FAN
Replace
1.0
57,59,78,86

0503
HOSES, WATER
Replace
0.5
57,59,78,86

0504
PUMP, WATER
Replace
0.8
15,57,59,78
,86

0505
CLUTCH, ENGINE FAN
Inspect
1.0
57

Replace
1.5
2,53,57, 78

Repair
1.2
56,59,60,61
,78,79

TM 9-2320-365-20-1

B-6 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)
(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

0601
ALTERNATOR, 100 AMP
Inspect
0.2

Test
0.5
1.5
59,63,78

Replace
1.0
59,78

Repair
0.2
0.5
38,56,57,59
,63,78,79

0603
STARTING MOTOR, ENGINE
Inspect
0.1

Test
0.5
0.5
57,63

Replace
1.5
2,9,57,
59,78

Repair
2.1
52,56,59,60
,76,78

0606
SOLENOID, FUEL SHUTOFF
Replace
1.0
60,78,80

0607
CABLE ASSEMBLY,
DASHBOARD
Test
0.5
56

Replace
2.9
57,59,76,
78

Repair
1.0
0.6
56,57,61,78

0607
DISPLAY, LIGHTED
INDICATOR
Test
0.3

Replace
0.5
78,86

Repair
0.3
78

0609
LIGHT ASSEMBLY, BACKUP
Inspect
0.1

Replace
0.8
57,78

Repair
0.3
78

0609
LIGHT, BLACKOUT DRIVE
Inspect
0.1

Replace
0.8
57,59,78

Repair
0.5
78

0609
TAILLIGHT ASSEMBLY,
COMPOSITE
Inspect
0.1

Replace
0.8
57,59,78

Repair
0.5
78

0609
LIGHT ASSEMBLY, FRONT
TURN SIGNAL AND PARK
Inspect
0.1

Replace
0.8
57,59,78

Repair
0.5
78

0609
HEADLIGHT
Inspect
0.1

Adjust
0.4
78

Replace
1.0
57,59,78

0610
AUDIBLE ALARM
Inspect
0.1

0611
HORN, CAB
Inspect
0.1

TM 9-2320-365-20-1

Change 3 B-7

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)
(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Replace
0.4
57,78

0612
BOX ASSEMBLY, BATTERY
Inspect
0.1

Test
0.5
57,78

Service
0.3
57
A

Replace
1.0
57,59,78

Repair
0.2
63

0613
CABLE ASSEMBLY, LH/RH
CAB AND DOOR MARKER
LIGHTS

Inspect
0.1

Replace
0.8
78

Repair
0.7
63

0613
CABLE ASSEMBLY, LOWER,
CAB MARKER LIGHTS, M1081
Inspect
0.1

Replace
0.6
78,86

Repair
0.5
63

0613
CABLE ASSEMBLY, UPPER,
CAB CLEARANCE AND
MARKER LIGHTS, M1081

Inspect
0.1

Replace
0.8
78,86

Repair
0.5
63

0613
CABLE ASSEMBLY,
STE/ICE-R
Replace
1.0
78

Repair
0.5
0.8
63

0613
CABLE ASSEMBLY, CAB
CLEARANCE AND MARKER
LIGHTS

Inspect
0.1

Replace
1.2
57,78

Repair
0.5
0.8
63

0613
CABLE ASSEMBLY,
WARNING LIGHT
Replace
0.5
48,78,86

Repair
0.3
0.5
63

0613
CABLE ASSEMBLY,
WINDSHIELD WASHER
PUMP/EMI

Replace
0.5
78

Repair
0.3
63

0613
CABLE ASSEMBLY, ENGINE
CONTROL
Inspect
0.1

Replace
2.3
57,78

Repair
0.5
0.5
63

0613
CABLE ASSEMBLY, FRONT
INTERVEHICULAR, 12 VDC
Replace
0.8
59,78

Repair
0.2
1.3
63

TM 9-2320-365-20-1

B-8 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

0613
CABLE ASSEMBLY, FRONT
LIGHTS
Replace
2.0
57,59,78,86

Repair
0.5
0.5
63

0613
CABLE ASSEMBLY, REAR
LIGHTS
Replace
2.8
57,59,78

Repair
0.5
0.5
63

0613
CABLE ASSEMBLY, PTO
Replace
1.6
57,59,78

Repair
0.5
0.8
63

0613
CABLE ASSEMBLY, REAR
INTERVEHICULAR, 24 VDC
Replace
0.6
59,78

Repair
0.5
0.8
63

0613
CABLE ASSEMBLY, START
AND CHARGING
Replace
2.0
57,78

Repair
0.5
0.8
63

0613
CABLE ASSEMBLY, WINCH
CONTROL VALVE
Replace
1.8
57,59,78

Repair
0.5
0.8
63

0705
WTEC II VEHICLE
INTERFACE MODULE (VIM)
Replace
0.6
78

Repair
0.8
78

0708
TORQUE CONVERTER
Adjust
0.9
18,59,60,78

Remove/
Install
0.8
56,59,60,61
,78

Repair
1.3
30,56,59,60
,62,78

0710
TRANSMISSION
Inspect
0.4
78

Service
1.5
57,59,78

Replace
7.0
56,59,60,61
,78,79,84

Repair
0.4
2.7
1.9
3,18,19,
24,25,27,41
,56,57,59,6
0,61,78,79,
84

0710
MODULE, FRONT SUPPORT
Remove/
Install
2.0
56,57,59,60
,61,78

Repair
0.7
30,56,57,59
,60,61,78

0710
MODULE, PLANETARY GEAR
(P1)
Remove/
Install
2.0
59,60,71,78

TM 9-2320-365-20-1

Change 3 B-9

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Repair
1.5
59,60,71,78

0710
MODULE, PLANETARY (P2)
Remove/
Install
2.0
3,56,59,
60,61,78

Repair
1.9
3,19,56,
59,60,61,71
,78

0710
PLANETARY CARRIER (P3)
Remove/
Install
2.0
3,56,60, 78

Repair
1.9
3,27,56,
60,78

0710
MODULE, MAIN SHAFT
Remove/
Install
2.0
59,60,78

Repair
0.4
59,60,78

0710
MODULE, CONVERTER
HOUSING
Remove/
Install
4.3
3,56,57,
59,60,78

Repair
2.0
3,19,25,
56,57,59,60
,78

0713
CLUTCH ASSEMBLY,
C3/C4/C5, TRANSMISSION
Remove/
Install
2.0
56,57,59,60
,78

Repair
1.0
41,56,57,59
,60,78

0713
MODULE, ROTATING
CLUTCH
Remove/
Install
2.0
3,56,59,
60,78

Repair
2.4
3,19,24,
56,59,60,78

0714
VALVE ASSEMBLY,
CONTROL MODULE
Remove/
Install
2.0
56,59,60,61
,78,79

Repair
1.0
2.5
59,61,78,79

0714
BODY ASSEMBLY, MAIN
VALVE
Service
1.5
57,59,78

Remove/
Install
2.0
56,59,60,61
,78,79

Repair
1.5
2.5
56,59,60,61
,78,79

0801
MODULE, TRANSFER CASE
Adjust
1.0

Remove/
Install
2.0
21,56,57,59
,60,61,71,7
4,78,79

Repair
1.1
23,27,33,50
,56,57,60,7
8

TM 9-2320-365-20-1

B-10 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

0802
HOUSING ASSEMBLY, C6
AND C7 CLUTCH
Remove/
Install
2.0
56,59,60,61
,78

Repair
0.8
19,23,26,27
,28,29,56,5
9,60,61,62,
71,78

0802
CONTROL VALVE ASSEMBLY Remove/
Install
2.0
56,59,61,78
,79

Repair
1.0
56,59,61,78
,79

0804
PUMP ASSEMBLY, OIL
Replace
1.0
79

Repair
0.8
79

0900
PROPELLER SHAFT
Inspect
0.1

Service
0.5
59

Repair
0.6
57,59,78

Replace
0.5
57,59,78

1000
AXLE ASSEMBLY, FRONT
Inspect
0.1
0.3
0.7
78

Adjust
1.0
57,79

Service
0.5
59,78

Replace
4.5
56,57,59,60
,61,70,78

Repair
2.3
2.2
6.0
56,57,59,60
,61,78

1002
CARRIER ASSEMBLY,
DIFFERENTIAL
Inspect
0.1
0.1
0.1
78,79

Service
0.3
78

Replace
4.6
21,56,57,59
,60,78,79

Repair
2.7
56,57,59,60
,78,79

1004
STEERING KNUCKLE, AXLE
Inspect
0.2

Adjust
2.5
79

Service
0.3
79

Replace
5.1
56,57,59,60
,71,78

1100
AXLE ASSEMBLY, REAR
Inspect
0.1
0.4
0.7

Service
0.8
57,59,78

Replace
4.5
34,56,57,59
,60,78,84

TM 9-2320-365-20-1

Change 3 B-11

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Repair
0.9
6.0
21,56,57,59
,60,78,84,8
5

1102
CARRIER ASSEMBLY,
DIFFERENTIAL
Inspect
0.1
0.1
1.0
78,79

Service
0.3
78

Replace
4.6
21,56,57,59
,60,78,79,8
5

Repair
2.7
21,37,56,57
,59,60,71,7
3,78

1202
BRAKE ASSEMBLY, FRONT
AXLE
Inspect
0.1
1.0
59,78,79

Adjust
0.4
57,59,78

Repair
1.5
0.5
57,59,78,83

1202
BRAKE ASSEMBLY, REAR
AXLE
Inspect
0.1
1.0
59,78,79

Adjust
0.4
57,59,78

Repair
1.5
0.5
57,59,78,83

1208
BRAKE AIR CHAMBER
Inspect
0.1

Replace
0.5
57,59,78

1209
AIR COMPRESSOR
Adjust
0.6
59,78

Replace
1.2
56,60,61,78
,79

1311
WHEEL ASSEMBLY,
PNEUMATIC TIRE
Inspect
0.1
57
B

Replace
1.0
1.2
57,59

Repair
2.0
57,59

1313
TIRE, PNEUMATIC
Replace
2.0
57,59

1401
STEERING SYSTEM
Inspect
0.2

Adjust
1.0
56,60,78

Repair
1.0
1.5
54,56,57,59
,60,61,78,7
9

1407
STEERING GEAR ASSEMBLY
Replace
4.0
56,60,78

1410
PUMP, POWER STEERING
Replace
1.5
47,56,59,60
,78

1411
HOSES, POWER STEERING
Replace
0.3
57,59,78,88

1413
HYDRAULIC RESERVOIR,
Service
0.1
0.5
78

TM 9-2320-365-20-1

B-12 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

POWER STEERING

Replace
0.8
59,78,86

1501
FRAME ASSEMBLY
Inspect
0.1
0.3

Repair
0.8
14.0
56,57,59,60
,61,78,79

1504
RETAINER, SPARE TIRE
Inspect
0.1
0.1

Replace
3.0
57,59,78

Repair
0.6
57,59,78

1601
LEAF SPRING ASSEMBLIES
Inspect
0.1
0.2

Service
0.3
57

Replace
2.7
56,57,59,60
,78,79

1604
SHOCK ABSORBERS
Inspect
0.1
0.3

Replace
0.5
57,59,78

1605
STABILIZER BAR, REAR
Inspect
0.2

Replace
2.0
57,59,68,78

Repair
1.5
57,78

1801
CAB BODY, STANDARD
Inspect
0.1

Replace
60.0
56,57,60,61
,78,79

Repair
0.6
57,59,78

1801
CAB BODY, AIR DROP
Inspect
0.1

Replace
60.0
56,57,60,61
,78,79

Repair
0.6
57,59,78

1801
CAB DOORS, STANDARD
Inspect
0.1

Replace
1.0
55,59,78

Repair
2.7
49,57,78

1801
CAB DOORS, AIR DROP
Inspect
0.1

Replace
1.0
55,59,78

Repair
2.7
49,57,78

1801
SUPPORT ASSEMBLY, CAB
FRONT
Inspect
0.1

Repair
1.1
57,59,78

Replace
3.0
8,13,57,
59,60,78,
79

1801
SUPPORT ASSEMBLY, CAB
REAR
Inspect
0.1

TM 9-2320-365-20-1

Change 3 B-13

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)
(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Replace
1.0
57,59,78

Repair
0.8
57,78

1802
WINDSHIELD
Replace
0.6
55,59,78

1802
FENDER, VEHICULAR,
FRONT
Inspect
0.1

Replace
2.0
57,59,78

Repair
0.5
57,78

1803
ROOF, CAB, M1081
Replace
1.0
45,50,57,59
,78

1805
FLOOR COVERING, CAB
Replace
1.0
57,78

1806
SEATS
Replace

1808
TOOL BOX ASSEMBLY
Inspect
0.1

Replace
0.5
47,57,59,78

Repair
0.5
57,59,78

1808
STOWAGE BOX, CAB
Replace
0.8
57,78

Repair
0.5
57,78

1810
BODY, CARGO
Inspect
0.1

Replace
4.0
56,57,59,60
,78

Repair
0.5
57,59,78

1812
BODY ASSEMBLY, VAN
Inspect
0.1
0.1

Repair
0.5
20,35,36,42
,43,47,57,5
9,64,72,76,
78

Replace
1.9
36,64,78

1812
DOOR, ACCESS, LEFT
Inspect
0.1

Replace
2.3
78

Repair
0.1
57,59,78

1812
DOOR, ACCESS, RIGHT
Inspect
0.1

Replace
1.4
78

Repair
0.4
57,59,78

1812
WINDOW SASH ASSEMBLY
Inspect
0.1

Replace
0.2
78

Repair
0.4
57,59,78

1812
BOX ASSEMBLY, RELAY
Inspect
0.1
0.1

Replace
0.6
78

Repair
0.1
78

Test
0.1
0.5
59,78

1812
FAN ASSEMBLY
Inspect
0.1

TM 9-2320-365-20-1

B-14 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Replace
1.8
20,76,78

Repair
0.5
78

2001
WINCH, 11K SELF-
RECOVERY (SRW)
Inspect
0.1
4.0

Service
0.2
59

Replace
1.0
59,60,78

Repair
0.9
59,60,78

2004
POWER TAKEOFF
ASSEMBLY (PTO)
Inspect
0.1

Replace
1.0
56,57,59,60
,78

Repair
0.8
56,57,59,60
,78

2202
MOTOR, WIPER,
WINDSHIELD
Test
0.5

Replace
1.0
78

2207
HEATER ASSEMBLY,
PERSONNEL
Replace
2.0
57,59,78

Repair
1.0
57,59,78

2210
DECALS
Inspect
0.1

Replace
1.0
78

2401
POWER UNIT,
AIR/HYDRAULIC
Inspect
0.1

Test
0.2

Service
1.0

Replace
3.0
57,59,78

Repair
2.0
57,59,60,69
,78,79

2402
MANIFOLD, HYDRAULIC
Inspect
0.1

Test
0.2

Replace
1.5
51,57,59,78

Repair
1.0
51,57,59,78

2402
LATCH, HYDRAULIC, CAB
Inspect
0.1

Adjust
0.5
57,59,78

Replace
0.5
57,59,78

2404
SUSPENSION CYLINDER
Inspect

Replace

2406
FILTER, HYDRAULIC
Service
0.3
59,78

Replace
0.2
59,78

2408
RESERVOIR, HYDRAULIC
Replace
1.0
57,59,78

TM 9-2320-365-20-1

Change 3 B-15

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Repair
0.5
57,59,78

3303
HEATER KIT, M1079
Inspect
0.1

Remove/
Install
2.5
78

3307
ALTERNATOR KIT, 200 AMP
Inspect
0.1
0.2

Test
0.5
59

Remove/
Install
2.0
57,59,78

Replace
1.0
57,59,78

Repair
0.5
56,57,60,62
,78

3307
ALTERNATOR, 200 AMP
Inspect
0.2

Test
0.5
1.5
59,63,78

Replace
1.0
57,59,78

Repair
0.2
0.5
56,57,60,61
,63,78

3307
CRANE (LMHC), MATERIAL
HANDLING, LIGHT
Inspect
0.1
0.1

Repair
0.5
59,76,78

Replace
0.5

Test
0.5

3307
WEIGHT BLOCK AND WIRE
ROPE, LMHC
Inspect
0.1

Replace
0.1
59,78

Repair
0.5
59,78

Test
0.5

3307
WINCH, LMHC
Inspect
0.1

Replace
0.5
59,78

Repair
1.0
59,78

Test
0.5

3307
MAST/SWING ASSEMBLY,
LMHC
Inspect
0.1

Repair
1.0
59,78

Test
0.5

3307
CONTROL BOX, LMHC
Inspect
0.1

Replace
0.1

Repair
0.5
76,78

Test
0.1
0.5

3307
TROOPSEAT KIT
Remove/
Install
1.0

TM 9-2320-365-20-1

B-16 Change 3

Section II. MAINTENANCE ALLOCATION CHART FOR THE LMTV VEHICLE (CONT)

(1)
Group
Number

(2)
Component/Assembly

(3)
Maintenance
Function

(4)
Maintenance Level
(5)
Tools and
Equipment
Ref Code

(6)
Remarks
Code

FIELD
SUSTAINMENT

Unit
Direct
Support
General
Support
Depot

C
O
F
H
D

Inspect
0.1

Replace
1.0

Repair
0.5
78

3307
COVER KIT, CARGO SOFT
TOP
Remove/
Install
1.5

Inspect
0.1

Replace
2.0

Repair
0.5

3307
AIR CONDITIONER KIT,
M1079
Inspect
0.1

Remove/
Install
1.5
59,78

3307
WARNING LIGHT ASSEMBLY,
AMBER
Inspect
0.1

Repair
0.4
78

Test
0.2

3401
MACHINE GUN RING KIT
Inspect
0.1

Remove/
Install
4.0
56,57,60,78
,79,84

Repair
1.1
10,57,78

3402
MOUNT, SMALL ARMS
Inspect
0.1

Replace
0.3
78

3909
CABLE ASSEMBLY,
WARNING LIGHT
Inspect
0.1

Replace
0.5
78

4316
AIR HOSE, CTIS
Inspect
0.1

Replace
0.4
59,78

4317
VALVE, INVERSION
Replace
0.5
59,78

4321
AIR DRYER
Inspect
0.1
0.1

Replace
1.0
57,59,78

Repair
0.6
57,59,78

4702
GAUGE, AIR FILTER
RESTRICTION
Replace
0.5
78

TM 9-2320-365-20-1

Change 3 B-17

Section III. TOOLS AND TEST EQUIPMENT FOR LMTV VEHICLES
Tool or Test
Equipment
REF Code

Maintenance
Level

Nomenclature
National Stock Number
Tool Number

1
O,F
ADAPTER, RADIATOR
4910-01-170-4928
J29003-A

2
O
ADAPTER, SOCKET WRENCH
5120-00-240-8702
11655788-2

2.1
O
BASE, MAGNETIC
P5646

3
H
BUSHING DRIVER SET
5120-01-391-3541
J35922

4
O
CRIMPING TOOL, TERMINAL, HAND
5120-00-165-3912
M22520/1-01

5
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-00-078-3809
10935497

6
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-00-293-1010
5120-293-1282

7
F
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-00-181-6754
GGG-C-1507

8
F
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-074-7557
FCOM19

9
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-236-9996
FCOM15

10
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-335-1091
FCO32

11
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-335-1119
SCO34

12
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-335-1122
SCO40

12.1
O
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-335-1126
SCO48

13
F
CROWFOOT ATTACHMENT,
SOCKET WRENCH
5120-01-348-9473
AN8508-19A

13.1
O
DISPENSER, SEALANT
5120-00-061-1283
45RCT

13.2
F
DRILL SET, STOPCOLLAR
5133-01-383-7665
1955

14
H
DRIVER KIT, BEARING
4910-01-032-3128
8S0602

14.1
O
FRAME, HAND HACKSAW
5110-00-289-9657
163-20

15
DELETED

16
O,F
GAGE, BELT TENSION
6635-01-143-2237
GA-424

17
O,F
GAGE, PRESSURE, 0-150 psi
6685-00-474-5721
111T1D05A01

18
F,H
GAGE, PROFILE
5220-01-388-1460
J-38548-1

19
H
HANDLE, DRIVE
5120-00-377-2259
J8092

20
O
HEATER, GUN TYPE, ELECTRIC
4940-00-561-1002
500A

21
F,H
HOLDING BAR, PINION
5120-01-166-0573
J3453

21.1
O
INDICATOR, DIAL
P36491

22
O
INSERTER AND REMOVER,
ELECTRICAL CONTACT
5120-00-915-4588
MS3447-16

23
H
INSERTER AND REMOVER, SPRING
5120-01-388-3660
J38573

24
H
INSERTER AND REMOVER, SPRING
5120-01-388-4436
J35923

25
H
INSERTER, BEARING AND BUSHING
5120-01-388-7841
J-38565

TM 9-2320-365-20-1

B-18 Change 3

Section III. TOOLS AND TEST EQUIPMENT FOR LMTV VEHICLES (Cont)

Tool or Test
Equipment
REF Code

Maintenance
Level

Nomenclature
National Stock Number
Tool Number

26
H
INSERTER, BEARING AND BUSHING
5120-01-389-0658
J35921-1

27
H
INSERTER, BEARING AND BUSHING
5120-01-390-1104
J 38569

28
H
INSERTER, BEARING AND BUSHING
5120-01-390-1105
J 38568-3

29
H
INSERTER, BEARING AND BUSHING
5120-01-391-5133
J 38579

30
F,H
INSERTER, BEARING AND BUSHING
5120-01-414-7398
J38566

31
F
INSERTER, SEAL
5120-01-362-2026
1U7430

32
F
INSERTER, SEAL
5120-01-362-2027
1U7598

33
F
INSTALLER, SEAL
N/A
J38574

33.1
F
JACK, DOLLY TYPE HYDRAULIC
4910-01-396-5044
TTJ3

34
F
JACK, LEVELING SUPPORT,
VEHICLE
2590-00-231-7418
10876244

35.1
O
KEY, SOCKET HEAD SCREW
5120-01-355-1670
AWML2.5

35.2
F
LIFTING SADDLE ASSEMBLY
TTJ-ZIFA

36
O
LINK, CHAIN, END
4010-00-932-5013
NAS1049-16

36.1
F
NOSE ASSEMBLY
99-3307

36.2
O
PLIERS, HOG RING STAPLE
5120-01-413-8837
0012

37
H
PULLER KIT, UNIVERSAL
5180-00-089-3660
A57QB

38
F
PULLER KIT, UNIVERSAL
5180-01-124-1903
1P3075

39
O
REMOVER, ELECTRICAL CONTACT
5120-00-148-9844
MS3448-001B

40
F
RIVETER, BLIND, HAND
5120-01-289-4310
HP-2

40.1
F
RIVETER, BLIND, PNEUMATIC
5130-01-232-4042
245

41
H
RIVETER, YOKE, HAND
5120-01-415-3558
J-39354

42
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-00-180-0881
5120-00-180-0881

43
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-053-4158
FAM5A

44
O,F,H
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-055-1308
ANSIB18.3.2M

45
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-079-8032
SAM8A

46
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-160-8862
S 6 HBS

47
O,F
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3462
SA10A

47.1
O,F
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3483
FA5LE

48
O,F
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3497
TMP12A

49
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3519
F23D

50
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3526
FP24

51
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3527
FP32A

52
F,H
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3536
FTX40A

53
O
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-367-3574
GFA8A

TM 9-2320-365-20-1

Change 3 B-19

Section III. TOOLS AND TEST EQUIPMENT FOR LMTV VEHICLES (Cont)

Tool or Test
Equipment
REF Code

Maintenance
Level

Nomenclature

National Stock Number

Tool Number

53.1
F
SCREWDRIVER ATTACHMENT,
SOCKET WRENCH
5120-01-430-5715
SZ-21

54
O
SEPARATOR, BALL JOINT
5120-01-255-8238
2287

55
F
SETTING TOOL, WINDSHIELD
5120-01-316-4995
CRL216

56
O,F
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-348-7696
SC4910-95CLA02

57
O,F,H
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0650
SC4910-95CLA72

58
O
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0653
SC4910-95CLA73

59
O,F,H
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0654
SC4910-95CLA74

60
F,H
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0705
SC4910-95CLA31

61
F,H
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0706
SC4910-95CLA62

62
O,F,H
SHOP EQUIPMENT, AUTOMOTIVE
VEHICLE
4910-00-754-0707
SC4910-95CLA63

63
O,F
SHOP EQUIPMENT, FUEL AND
ELECTRICAL
4910-00-754-0714
SC4910-95CLA01

64
O
SLING, EYE
3940-01-334-0749
EE1-202

65
F
SLING, MULTIPLE LEG
3940-00-777-5744
A170

66
H
SOCKET SET, SOCKET WRENCH
5120-01-195-0640
208FA

67
F,H
SOCKET, SOCKET WRENCH
5120-01-068-5643
5555M

68
O
SOCKET, SOCKET WRENCH
5120-01-161-5907
GLDH382

69
F
SOCKET, SOCKET WRENCH
5120-01-335-0784
TW321

70
O
SOCKET, SOCKET WRENCH
5120-01-144-5324
ANS 1913A

71
F
SOLDERING AND BRAZING OUTFIT,
RESISTANCE HEATING
3439-00-460-7198
SC4940-95-CLB20

72
O
SOLDERING IRON, ELECTRIC
3439-01-036-3308
3112-S3-40W

73
H
STAND, DIFFERENTIAL CARRIER
REPAIR
4910-01-085-7729
J3409-D

74
H
STAND, MAINTENANCE,
AUTOMOTIVE ENGINE
4910-00-808-3372
J29109

75
F
TOOL, DISTORTER
5120-01-119-1748
5P-7312

76
O,F
TOOL KIT, AUTO FUEL AND
ELECTRICAL SYSTEM REPAIR
5180-00-754-0655
SC4910-95CLA50

77
F
TOOL KIT, BODY AND FENDER
5180-00-754-0643
SC5180-90-N34

78
O,F,H
TOOL KIT, GENERAL MECHANIC'S
5180-00-177-7033
SC5180-90-CL-N26

79
F,H
TOOL KIT, GENERAL MECHANIC'S
5180-00-699-5273
SC5180-90-CL-N05

80
F
TOOL KIT, INTERNAL COMBUSTION
ENGINE
5180-01-356-8155
1U6680

81
H
TOOL KIT, DIESEL INJECTOR
5180-01-466-3966
143-2099

82
F
TOOL OUTFIT, HYDRAULIC
4940-01-036-5784
SC4940-95-CL-B07

TM 9-2320-365-20-1

B-20 Change 3

Section III. TOOLS AND TEST EQUIPMENT FOR LMTV VEHICLES (Cont)

Tool or Test
Equipment
REF Code

Maintenance
Level

Nomenclature

National Stock Number

Tool Number

83
O
TOOL, SPRING REMOVAL
5120-01-360-1918
TV940010

84
F
WRENCH SET, CROWFOOT,
RATCHETING
5120-00-293-0013
GGG-W-646

85
F
WRENCH SET, SOCKET
5120-00-148-3706
ANSI-B107.5

86
O
WRENCH, TORQUE, 0-75 LB-IN.
5120-01-112-9532
TQSC6A

Section IV. REMARKS FOR THE LMTV VEHICLE

Remarks Code
Remarks

A
Battery service will be in accordance with TM 9-6140-200-14.

B
Repair of tires will be in accordance with TM 9-2610-200-14.

APPENDIX C
TOOLS IDENTIFICATION LIST

Section I. INTRODUCTION

C-1. INTRODUCTION

This appendix lists common tools, supplements, and special tools/fixtures that are suggested for maintenance tasks
performed at the Unit Maintenance level.

C-2. EXPLANATION OF COLUMNS

a. Column (1) - Item Number. This number is assigned to the entry in the listing and is referenced in the narrative
instructions to identify the item, e.g., "Bar, Pry (Item 1, Appendix C)."

b. Column (2) - Item Name. This column contains the nomenclature for the item.

c. Column (3) - National Stock Number. This is the national stock number assigned to the item which you can use
to requisition it.

d. Column (4) - Part Number. This provides the Government, manufacturer, or vendor part number for the item.

e. Column (5) - Reference. This column contains the shop catalog (SC), technical manual, or other publication
which provides an illustration and description of the item, or lists whether the item is fabricated.

APPENDIX C
Section II. TOOLS IDENTIFICATION LIST

(1)
ITEM
NUMBER

(2)

ITEM NAME

(3)
NATIONAL
STOCK NUMBER

(4)

PART NUMBER

(5)

REFERENCE

1
ADAPTER, SOCKET
WRENCH

5120-00-227-8088
A-A-2172
SC 4910-95-CL-A74

2
ADJUSTING TOOL, BRAKE
SHOE

5120-00-154-3029
J34061
SC 4910-95-CL-A74

3
APRON, RUBBER
8145-00-082-6108
MIL-A-41829
SC 4910-95-CL-A74

4
CAPS, VISE JAW
5120-00-221-1506
GGG-C-137
SC 4910-95-CL-A74

5
DISPENSING PUMP, HAND
DRIVEN

4930-00-263-9886
43D15069
SC 4910-95-CL-A74

6
DRILL SET, TWIST
5130-00-293-0983
58
SC 4910-95-CL-A74

7
DRILL, PORTABLE,
ELECTRIC

5130-00-293-1849
W-D-661
SC 4910-95-CL-A74

8
DRILL, TWIST
5133-01-120-3519
SC 4910-95-CL-A74

C-1

TM 9-2320-365-20-1

TM 9-2320-365-20-1

C-2 Change 2

Section II. TOOLS IDENTIFICATION LIST (CONT)

(1)
ITEM
NUMBER

(2)

ITEM NAME

(3)
NATIONAL
STOCK NUMBER

(4)

PART NUMBER

(5)

REFERENCE

9
FISHING TOOL, PNEUMATIC
TIRE VALVE
5120-00-516-4220
991
SC 4910-95-CL-A74

10
GAGE, DEPTH,
MICROMETER
5210-00-619-4045
445BZ-6RL
CTA 50-909

11
GAGE, TIRE PRESSURE
4910-01-117-2994
955
SC 4910-95-CL-A72

12
GAGE, WHEEL ALIGNMENT
5210-01-223-3701
WA361
SC 4910-95-CL-A72

13
GLOVES, RUBBER
8415-00-641-4601
ZZ-G-381
SC 4910-95-CL-A74

14
GLOVES, WELDER'S
8415-00-268-7859
A-A-50022
SC 4910-95-CL-A72

15
GOGGLES, INDUSTRIAL
4240-00-052-3776
A-A-1110
SC 4910-95-CL-A74

16
GUN, LUBRICATING
4930-00-253-2478
1142
SC 4910-95-CL-A74

17
HAMMER, HAND
5120-00-224-4130
A-A-1292
SC 4910-95-CL-A74

18
HAMMER, HAND
5120-01-065-9037
57-533
SC 4910-95-CL-A72

19
HOSE ASSEMBLY,
NONMETALLIC
4720-00-356-8557
ZZ-H-461
SC 4910-95-CL-A74

20
IRON, TIRE
5120-00-765-8536
T48A
SC 4910-95-CL-A74

21
JACK, HYDRAULIC, HAND
5120-00-224-7330
D120
SC 4910-95-CL-A74

22
MULTIMETER, DIGITAL
6625-01-139-2512
T00377
SC 4910-95-CL-A74

23
MULTIPLIER, TORQUE
WRENCH
5120-00-574-9318
292
SC 4910-95-CL-A72

24
PAN, DRAIN
4910-00-387-9592
450
SC 4910-95-CL-A72

25
PAN, WASH
4940-00-617-9859
5582281
SC 4910-95-CL-A72

26
PRESSURE TESTER,
RADIATOR
4910-01-170-4929
J24460-01
SC 4910-95-CL-A74

27
PULLER KIT, MECHANICAL
5120-00-313-9496
1178
SC 4910-95-CL-A74

28
PULLER, BATTERY
TERMINAL
5120-00-944-4268
21
SC 4910-95-CL-A74

29
RESPIRATOR, AIR FILTER
4240-00-022-2524
GGG-M-125/6
SC 4910-95-CL-A72

30
SCALE, WEIGHING
6670-00-254-4634
AAA-5-133
SC 4910-95-CL-A72

31
SLING, CARGO
1670-00-823-5043
63J4261-13
CTA 50-970

32
SLING, ENDLESS
3940-00-675-5003
PD101-96
CTA 50-970

33
SOCKET SET, IMPACT
5120-01-117-0466
4151MMY
SC 4910-95-CL-A74

34
SOCKET SET, SOCKET
WRENCH
5120-01-073-2821
217FMY
SC 4910-95-CL-A72

TM 9-2320-365-20-1

Change 2 C-3

Section II. TOOLS IDENTIFICATION LIST (CONT)

(1)
ITEM
NUMBER

(2)

ITEM NAME

(3)
NATIONAL
STOCK NUMBER

(4)

PART NUMBER

(5)

REFERENCE

35
SOCKET SET, SOCKET
WRENCH
5120-01-117-3876
221FSMY
SC 4910-95-CL-A02

36
SOCKET, SOCKET WRENCH
5120-00-181-6813
5530
SC 4910-95-CL-A74

37
SOCKET, SOCKET WRENCH
5120-00-232-5681
1242
SC 4910-95-CL-A74

38
SOCKET, SOCKET WRENCH
5120-01-112-0581
SIMM190
SC 4910-95-CL-A74

39
STE/ICE-R
4910-01-222-6589
12259266
SC 4910-95-CL-A74

40
TAPE, MEASURING
5210-00-081-4719
GA508A
CTA 50-970

40.1
TEST KIT, RADIATOR
4910-00-728-8227
SC 4910-95-CL-A74

40.2
TAP AND DIE SET
5136-01-119-0005
TDM99117
SC 4910-95-CL-A72

40.3
TAP, THREAD, CUTTING
5136-00-729-5692
B94.9 ½-13
UNCHSGH3
SC 4910-95-CL-A72

41
TESTER, ANTIFREEZE AND
BATTERY
6630-00-105-1418
10425
SC 4910-95-CL-A74

42
TOOL KIT, AUTO FUEL
5780-00-754-0655
SC 5180-95-CL-A50

43
TOOL KIT, BLIND RIVET
5180-01-201-4978
D-100-MIL-1
SC 4910-95-CL-A72

44
TOOL KIT, GENERAL
MECHANIC'S
5180-00-177-7033
SC 5180-90-N26

44.1
TOOL KIT, ELECTRICAL
CONTACT REPAIR
5780-00-876-9336
7550526
SC 4940-95-B09

45
TRESTLE, MOTOR VEHICLE
MAINTENANCE
4910-00-251-8013
306
SC 4910-95-CL-A72

46
VISE, MACHINIST
5120-00-293-1439
504M2
SC 4910-95-CL-A74

47
WRENCH SET, SOCKET
5120-00-081-2305
GGG-W-641
SC 4910-95-CL-A74

48
WRENCH SET, SOCKET
5120-00-204-1999
GGG-W-641
SC 4910-95-CL-A74

49
WRENCH SET, SOCKET
5120-00-322-6231
51200017510
SC 4910-95-CL-A74

50
WRENCH, ADJUSTABLE
5120-00-264-3793
2117080
SC 4910-95-CL-A72

51
WRENCH, ADJUSTABLE,
AUTOMOTIVE
5120-00-449-8083
1B7536
SC 4910-95-CL-A74

51.1
WRENCH, BOX AND OPEN
END
5120-00-228-9518
1174
SC 4910-95-CL-A74

52
WRENCH, BOX AND OPEN
END
5120-00-277-8833
1244
SC 4910-95-CL-A74

53
WRENCH, BOX AND OPEN
END
5120-00-277-8834
GGG-W-636
SC 4910-95-CL-A74

54
WRENCH, PIPE
5120-00-277-1461
SC 4910-95-CL-A74

TM 9-2320-365-20-1

C-4
Change 2

Section II. TOOLS IDENTIFICATION LIST (CONT)

(1)
ITEM
NUMBER

(2)

ITEM NAME

(3)
NATIONAL
STOCK NUMBER

(4)

PART NUMBER

(5)

REFERENCE

55
WRENCH, PIPE
5120-00-277-1485
SC 4910-95-CL-A74

56
WRENCH, STRAP,
ADJUSTABLE
5120-00-020-2947
A91C
SC 4910-95-CL-A74

57
WRENCH, TORQUE, 0-175 lb-
ft
5120-00-640-6364
1753LDF
SC 4910-95-CL-A72

58
WRENCH, TORQUE, 0-200 lb-
in.
5120-00-853-4538
F2001
SC 4910-95-CL-A72

58.1
WRENCH, TORQUE, 0-300 lb-
in.
5120-00-776-1841
2163993
SC 4910-95-CL-A74

59
WRENCH, TORQUE, 0-600 lb-
ft
5120-00-221-7983
SW130-301
SC 4910-95-CL-A72

APPENDIX D
EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

Section I. INTRODUCTION

D-1. SCOPE

This appendix lists expendable and durable items that you will need to operate and maintain the LMTV vehicle. This
listing is for information only and is not authority to requisition the listed items. These items are authorized to you by
CTA 50-970, Expendable/Durable Items (except medical, class V repair parts, and heraldic items), or CTA 8-100, Army
Medical Department Expendable/Durable Items.

D-2. EXPLANATION OF COLUMNS

a.
Column (1) - Item Number. This number is assigned to the entry in the listing and is referenced in the narrative
instructions to identify the item, e.g., "Oil, Lubricating (Item 25, Appendix D).

b.
Column (2) - Level. This column identifies the lowest level of maintenance that requires the item.

c.
Column (3) - National Stock Number. This is the national stock number assigned to the item which you can
use to requisition it.

d.
Column (4) - Item Name, Description, Commercial and Government Entity Code (CAGEC), and Part
Number. This provides the other information you need to identify the item.

e.
Column (5) - Unit of Measure. This code shows the physical measurement or count of an item, such as gallon,
dozen, gross, etc.

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

1
O
4730-00-248-9340
Adapter, Pipe to Tube (81343) 4-4 010103B
ea

1.1
O
4730-01-453-9651
Adapter, Straight, Pipe to Boss (19207)
12421890-001

ea

1.2
O
4730-01-457-4025
Adapter, Straight, Pipe to Tube (96906)
MS51503B4-4

ea

1.3
O
4730-00-760-3525
Adapter, Straight, Tube to Boss (81361) C116-3-71
ea

2
O
8040-00-273-8717
Adhesive (81348) MMM-A-121
pt

3
O
8040-00-152-0063
Adhesive (81348) MMM-A-1617 TY 3
bt

4
O
8040-01-250-3969
Adhesive (05972) 242
ea

5
O
8040-01-117-7872
Adhesive (04963) 08031
tu

6
O
8040-00-117-8510
Adhesive (71984) 3145 RTV Clear
tu

7
O
8040-00-776-9602
Adhesive (73168) 80055-31
kt

8
O
8040-00-118-2695
Adhesive (72799) RTV162
kt

Change 1
D-1

TM 9-2320-365-20-1

TM 9-2320-365-20-1

D-2
Change 2

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST (CONT)

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

9
O
8040-01-446-7842
Adhesive (01139) RTV123
ca

10
O
8040-01-331-7473
Adhesive (81349) (MIL-A-46106 GP3TY1)
tu

11
O
8040-01-331-7470
Adhesive (81349) (MIL-A-46106 GP1TY1)
tu

11.1
O
8040-00-728-3088
Adhesive (78500) 1199-T-3842
6 oz
kt

12
C
6850-00-174-1806
Antifreeze, Arctic Type (81349) (MIL-A-11755)
55 gl drum
dr

13
C

6850-01-441-3218
6850-01-441-3221
6850-01-441-3257

Antifreeze, Multi-Engine Type (58536)
(A-A-52624A)
Type I (Green) – 1 gal
Type I (Green) - 5 gal
Type II (Purple) - 5 gal

dr

gal
co
co

14
O
8030-00-597-5367
Antiseize Compound (81349) (MIL-A-907)
lb

14.1
O
5110-00-277-4588
Blade, Hand Hacksaw (54940) 31-51024
ea

14.2
O
5340-01-454-4336
Bracket, Angle (0FW39) 12421859-001
ea

15
O
5340-00-450-5718
Cap and Plug Set 10935405
ea

15.1
O
5340-01-423-0972
Clamp, Loop (18076) S630H-20
ea

16
O
6850-00-926-2275
Cleaning Compound, Windshield (81349) O-C-1901
16 oz bottle
bt

17
O
7920-00-044-9281
Cloth, Cleaning (81349) (MIL-C-85043)
bx

18
O

8030-00-062-6950
8030-01-149-1731
8030-00-837-6557
8030-00-903-0931

Corrosion Preventive Compound (81349)
(MIL-C-16173)
Grade 1 - 1 qt can
Grade 2 - 1 qt can
Grade 3 - 1 pt can
Grade 4 - 1 pt can

qt
qt
pt
pt

19
O
8030-00-033-4291
Corrosion Preventive Compound (MIL-C-82594)
8 oz can
bt

19.1
O
2540-01-460-8048
Cover, Seat, Vehicular (27797) WM1059
ea

19.2
O
2540-01-463-8394
Cover, Seat, Vehicular (0FW39) WM1058
ea

20
C
9150-00-664-0047
Damping Fluid (81348) VV-D-1078
1 lb can
lb

21
O
7520-01-209-1152
Dispenser, Pressure Sensitive Adhesive Tape
(75037) STD-0-9
ea

21.1
O
4730-01-454-1233
Elbow, Pipe to Boss (19207) 12421891-001
ea

21.2
O
4730-00-863-9098
Elbow, Pipe to Tube (30780) 4VBTXB
ea

22
O
5330-01-325-6993
Gasket Forming Compound (05972) 515
ea

22.1
O
Gasket Maker, RTV Silicone (05972) 5699
ea

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST (CONT)

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

23
C

9150-01-197-7688
9150-01-197-7690
9150-01-197-7689
9150-01-197-7692

Grease, Automotive and Artillery (GAA) (81349)
(MIL-G-10924)
2-1/4 oz tube
1.75 lb can
6.5 lb can
35 lb can

tu
cn
cn
cn

24
O
9150-00-530-6814
Grease, Wire Rope-Exposed Gear (81349)
(MIL-G-18458)
35 lb can

cn

25
O
9150-00-935-4018
Grease, Molybenum Disulfide (81349)
(MIL-G-21164)
14 oz cartridge

ca

25.1
O
4720-00-988-3842
Hose Assembly, Nonmetallic (50599) R25679-1
ea

25.2
O
4720-01-384-0995
Hose Assembly, Nonmetallic (19207)
12421858-006

ea

25.3
O
4720-01-453-9530
Hose Assembly, Nonmetallic (0FW39) 12421857
ea

25.4
O
4720-01-469-9208
Hose Assembly, Nonmetallic (19207)
12418004-002

ea

26
C

9150-00-252-6383
9150-00-223-4134

Hydraulic Fluid A (MIL-H-5606)
1 qt can
1 gl can

cn
cn

27
O
7510-00-145-0559
Ink, Marking Stencil (MIL-l-43553)
oz

28
O
7510-01-386-0787
Inking Pad, Rubber Stamp
ea

29
O
9150-01-360-1905
Insulating Compound, Electrical
tu

30
O
5970-00-838-5951
Insulation Sleeving, Electrical (06090)
CRN3-16BLACK

ft

30.1
O
5970-01-378-3018
Insulation Sleeving, Electrical (06090)
ATUM-1/4-0-4FT

lg

31
O
5970-01-422-3579
Insulation Sleeving, Electrical (06090) ATUM 1/2
4 ft length

lg

32
O
1650-00-166-4834
Lockwire (90166) 68A32
ea

33
O
9150-01-360-1905
Lubricant, Solid Film (MIL-L-46147)
16 oz can

cn

34
O
4730-00-019-0608
Nipple, Pipe
ea

35
O
4730-00-825-7304
Nipple, Tube MS51501B4
ea

36
O
5310-00-059-4265
Nut, Plain, Hex
ea

Change 1
D-3

TM 9-2320-365-20-1

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST (CONT)

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

36.1
C
Oil, Commercial Burner Fuel, Grade FO-1
(ASTM D396)

36.2
C
Oil, Commercial Burner Fuel, Grade FO-2
(ASTM D396)

37
C

9140-00-286-5282
9140-00-286-5283
9140-00-286-5284
9140-00-286-5285

Oil, Fuel Diesel, DF-A, Arctic (VV-F-800) (81348)
5 gl can
Bulk
55 gl drum, 16 gauge
55 gl drum, 18 gauge

cn
gl
dr
dr

38
C

9140-00-286-5286
9140-00-286-5287
9140-00-286-5288
9140-00-286-5289

Oil, Fuel, Diesel, DF-1, Winter (VV-F-800) (81348)
Bulk
5 gl can
55 gl drum, 16 gauge
55 gl drum, 18 gauge

gl
cn
dr
dr

39
C

9140-00-286-5294
9140-00-286-5295
9140-00-286-5296
9140-00-286-5297

Oil, Fuel, Diesel, DF-2, Regular (VV-F-800) (81348)
Bulk
Can
55 gl drum, 16 gauge
55 gl drum, 18 gauge

gl
cn
dr
dr

40
C

9150-00-402-2372
9150-00-491-7197

Oil, Lubricating, Arctic (MIL-L-46167)
5 gl can
55 gl drum

cn
dr

41
C

9150-00-035-5390
9150-00-035-5391

Oil, Lubricating, Gear, GO 75W (MIL-L-2105C)
1 qt can
5 gl can

cn
cn

42
C

9150-01-035-5392
9150-01-035-5393
9150-01-035-5394

Oil, Lubricating, Gear, 80W-90 (MIL-L-2105C)
1 qt can
5 gl can
55 gl drum, 16 gauge

qt
cn
dr

43
C

9150-00-183-7807
9150-00-186-6668
9150-00-191-2772

Oil, Lubricating, OE/HDO 10 (MIL-L-2104)
Bulk
5 gl can
55 gl drum

gl
cn
dr

44
C
9150-00-189-6727
Oil, Lubricating, OE/HDO 10W (MIL-L-2104)
1 qt can
cn

45
C

9150-01-152-4117
9150-01-152-4118
9150-01-152-4119

Oil, Lubricating, OE/HDO 15W-40 (MIL-L-2104)
1 qt can
5 gl can
55 gl drum

cn
cn
dr

D-4
Change 1

TM 9-2320-365-20-1

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST (CONT)

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

46
C

9150-00-183-7808
9150-00-186-6681
9150-00-188-9858
9150-00-189-6729

Oil, Lubricating, OE/HDO 30 (SAE 30) (MIL-L-2104)
Bulk
1 qt can
5 gl can
55 gl drum, 18 gauge

gl
cn
cn
dr

47
C

9150-00-405-2987
9150-00-189-6730
9150-00-188-9862

Oil, Lubricating, OE/HDO 40 (MIL-L-2104)
Bulk
1 qt can
5 gl can

gl
cn
cn

48
O
5350-00-067-7639
Paper, Abrasive (28124) 02347
pg contains 100 sheets
pg

49
O
8010-01-146-2650
Polyurethane Coating (MIL-C-46168)
kt

50
O
8030-00-181-8372
Primer, Sealing Compound (05972) 747-56
cn

51
C
7920-00-205-1711
Rag, Wiping A-A-531
be

52
DELETED

53
O
4020-00-855-2767
Rope, Fibrous (MIL-R-17343)
75 ft

cl

54
O
7520-00-634-2442
Rubber Stamp Set, Fixed Type
ea

55
O
5330-01-337-1108
Rubber Strip (12624) V4062
ft

56
O
5330-01-181-6482
Rubber Strip (19207) 12328583-3
ft

56.1
O
5305-00-021-3740
Screw, Cap, Hex Hd (97942) 645A560H43
ea

56.2
O
5305-01-299-4602
Screw, Cap, Hex Hd (64678) 000933 006058
ea

56.3
O
5305-01-454-5938
Screw, Cap, Hex Hd (19207) 12419954-093
ea

57
O
5305-01-296-0019
Screw, Cap, Socket Head (06888) SHCM75275
50 ct box

bx

58
O
1015-01-255-4144
Sealant, Pipe, Teflon (19207) 12297953
50 ml tube

tu

59
O
8030-00-081-2327
Sealing Compound (05972) 079-21
bx

60
O
8030-00-111-2762
Sealing Compound (05972) 290-31
bt

61
O
8030-00-133-3164
Sealing Compound (05972) 571-31
bt

62
O
8030-00-148-9833
Sealing Compound (05972) 271-21
bx

63
O
8030-00-204-9149
Sealing Compound (05972) 592-41
tu

64
O
8030-00-656-1426
Sealing Compound (81349) (MIL-S-45180)
pt

65
O
8030-01-025-1692
Sealing Compound (05972) 242-41 (MIL-S-46163)
bt

66
O
8030-01-088-8140
Sealing Compound (52571) 9001512-0011
bt

Change 1
D-5

TM 9-2320-365-20-1

TM 9-2320-365-20-1

D-6
Change 2

Section II. EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST (CONT)

(1)
Item
Number

(2)

Level

(3)
National Stock
Number

(4)

Description

(5)

U/M

67
O
8030-00-753-5006
8030-00-753-4599
8030-00-723-2746
8030-00-685-0915

Sealing Compound (81349) (MIL-S-8802TY2CLB-2)
2 oz cartridge
6 oz can
12 oz can
24 oz can

ca
kt
kt
kt

68
O
8030-01-155-3238
Sealing Compound (11083) 6V6640
ml

68.1
O
8030-01-371-8405
Sealing Compound (83574) PR-1422 B-1/2
6 oz
ca

68.2
O
8030-01-255-4144
Sealant (19207) 12297953
tb

68.3
O
8030-00-956-2397
Sealing Compound 104
tb

69
C
7930-00-634-3935
Soap, Laundry (81348) P-S-1792
lb

70
O
3439-00-006-7764
Solder, Tin Alloy (81348) SN63WRAP3
sl

71
C
6850-00-281-1985
6850-00-664-5685

Solvent, Dry Cleaning SD (P-D-680)
1 gl can
1 qt can
cn
cn

71.1
O
Strap, Tiedown, Electrical Components (06383)
PLP2S
ea

72
O
Tape, Adhesive (0SHR6) 70P00002
ea

72.1
O
9320-01-244-0046
Tape, Adhesive, Rubber (18876) MIS-41157-08
180 ft
ro

73
O
8030-00-889-3534
Tape, Antiseizing (81349) (MIL-T-27730)
ea

74
O
5640-00-103-2254
Tape, Duct (39428) 1791K70
ea

75
O
5970-00-644-3167
Tape, Insulation, Electrical (80063) TL83
ro

75.1
O
4730-00-138-8050
Tee, Pipe (81343) 8-8-8 140424C
ea

76
O
5975-01-379-4997
Ties, Cable, Plastic (06383) PLT 35-C-O
hd

C
Turbine Fuel, Aviation, Kerosene Type
(MIL-T-83133), Grade JP-8

C

9140-00-255-7764
9140-00-273-2378
9140-00-273-2377

Turbine Fuel, (MIL-F-16884), (NATO Code No. F75 or F-
72)
5 gl can
55 gl drum
1 gl can

cn
dr
cn

C

9130-00-273-2380

Turbine Fuel, (MIL-F-5624), Grade JP-4 (NATO Code No.
F40)
Drum, 16 gage
dr

C

9130-01-305-5596
9130-01-250-6353

Turbine Fuel, (MIL-T-5624), Grade JP-5
(NATO Code No. F-44)
Bulk
Drum, 16 gage
gl
dr

77
O
6145-01-148-2263
Wire, Electrical (80009) 175-0825-00
50 ft
ft

APPENDIX E
ILLUSTRATED LIST OF MANUFACTURED ITEMS

Section I. INTRODUCTION

E-1. INTRODUCTION

This appendix includes complete instructions for manufacturing or fabricating authorized items locally. All bulk materials
needed to manufacture an item are listed by part number or specification number. Figures are provided as needed. See
standards and specifications DoD-Std-00100D(AR) and ANSI Y14.5M1982 for required details.

Section II. MANUFACTURED ITEMS INDEX

ITEM NAME/PART NUMBER
ITEM DESCRIPTION
PARA NO.

Brake Adjusting Tool Support
E-2
Brake Plunger Seal Driver
E-3
Cab Support Tool
E-4
Headlight Adjustment Screen
E-5
M1079 Blackout Shield Seals
E-6
M1079 Door Gaskets
E-7
M1079 Window Sash Glazing Seals
E-8
Relay Test Wire
E-9
Wheel Bearing Shim Tool Rest
E-10
12414690-001
Pneumatic Tube
E-11
12414690-002
Pneumatic Tube
E-11
12414690-004
Pneumatic Tube
E-11
12414690-005
Pneumatic Tube
E-11
12414690-010
Pneumatic Tube
E-11
12414690-101
Pneumatic Tube
E-11
12414690-102
Pneumatic Tube
E-11
12414690-103
Pneumatic Tube
E-11
12414690-104
Pneumatic Tube
E-11
12414690-105
Pneumatic Tube
E-11
12414690-106
Pneumatic Tube
E-11
12414690-107
Pneumatic Tube
E-11
12414690-108
Pneumatic Tube
E-11
12414690-109
Pneumatic Tube
E-11
12414690-112
Pneumatic Tube
E-11
12414690-113
Pneumatic Tube
E-11
12414690-115
Pneumatic Tube
E-11
12414690-117
Pneumatic Tube
E-11
12414690-118
Pneumatic Tube
E-11
12414690-119
Pneumatic Tube
E-11
12414690-120
Pneumatic Tube
E-11
12414690-121
Pneumatic Tube
E-11
12414690-122
Pneumatic Tube
E-11
12414690-123
Pneumatic Tube
E-11
12414690-124
Pneumatic Tube
E-11
12414690-125
Pneumatic Tube
E-11
12414690-126
Pneumatic Tube
E-11
12414690-127
Pneumatic Tube
E-11
12414690-201
Pneumatic Tube
E-11
12414690-202
Pneumatic Tube
E-11

E-1
E-1

TM 9-2320-365-20-1

Section II. MANUFACTURED ITEMS INDEX (CONT)

ITEM NAME/PART NUMBER
ITEM DESCRIPTION
PARA NO.

12414690-203
Pneumatic Tube
E-11
12414690-205
Pneumatic Tube
E-11
12414690-206
Pneumatic Tube
E-11
12414690-207
Pneumatic Tube
E-11
12414690-208
Pneumatic Tube
E-11
12414690-209
Pneumatic Tube
E-11
12414690-210
Pneumatic Tube
E-11
12414690-211
Pneumatic Tube
E-11
12414690-212
Pneumatic Tube
E-11
12414690-213
Pneumatic Tube
E-11
12414690-214
Pneumatic Tube
E-11
12414690-215
Pneumatic Tube
E-11
12414690-216
Pneumatic Tube
E-11
12414690-217
Pneumatic Tube
E-11
12414690-218
Pneumatic Tube
E-11
12414690-219
Pneumatic Tube
E-11
12414690-220
Pneumatic Tube
E-11
12414690-221
Pneumatic Tube
E-11
12414690-222
Pneumatic Tube
E-11
12414690-223
Pneumatic Tube
E-11
12414690-224
Pneumatic Tube
E-11
12414690-225
Pneumatic Tube
E-11
12414690-226
Pneumatic Tube
E-11
12414690-227
Pneumatic Tube
E-11
12414690-228
Pneumatic Tube
E-11
12414690-229
Pneumatic Tube
E-11
12414690-230
Pneumatic Tube
E-11
12414690-231
Pneumatic Tube
E-11
12414690-301
Pneumatic Tube
E-11
12414690-302
Pneumatic Tube
E-11
12414690-303
Pneumatic Tube
E-11
12416381P1
Non-Metallic Electrical Cable Conduit
E-12
12416381P10
Non-Metallic Electrical Cable Conduit
E-12
12416381P11
Non-Metallic Electrical Cable Conduit
E-12
12416381P12
Non-Metallic Electrical Cable Conduit
E-12
12416381P13
Non-Metallic Electrical Cable Conduit
E-12
12416381P14
Non-Metallic Electrical Cable Conduit
E-12
12416381P15
Non-Metallic Electrical Cable Conduit
E-12
12416381P16
Non-Metallic Electrical Cable Conduit
E-12
12416381P17
Non-Metallic Electrical Cable Conduit
E-12
12416381P2
Non-Metallic Electrical Cable Conduit
E-12
12416381P20
Non-Metallic Electrical Cable Conduit
E-12
12416381P21
Non-Metallic Electrical Cable Conduit
E-12
12416381P22
Non-Metallic Electrical Cable Conduit
E-12
12416381P23
Non-Metallic Electrical Cable Conduit
E-12
12416381P26
Non-Metallic Electrical Cable Conduit
E-12
12416381P3
Non-Metallic Electrical Cable Conduit
E-12
12416381P30
Non-Metallic Electrical Cable Conduit
E-12
12416381P32
Non-Metallic Electrical Cable Conduit
E-12
12416381P34
Non-Metallic Electrical Cable Conduit
E-12
12416381P35
Non-Metallic Electrical Cable Conduit
E-12

E-2
E-2

TM 9-2320-365-20-1

ITEM NAME/PART NUMBER
ITEM DESCRIPTION
PARA NO.

12416381P36
Non-Metallic Electrical Cable Conduit
E-12
12416381P37
Non-Metallic Electrical Cable Conduit
E-12
12416381P38
Non-Metallic Electrical Cable Conduit
E-12
12416381P4
Non-Metallic Electrical Cable Conduit
E-12
12416381P5
Non-Metallic Electrical Cable Conduit
E-12
12416381P6
Non-Metallic Electrical Cable Conduit
E-12
12416381P7
Non-Metallic Electrical Cable Conduit
E-12
12416381P8
Non-Metallic Electrical Cable Conduit
E-12
12416381P9
Non-Metallic Electrical Cable Conduit
E-12
12418037
Steering Gear Return Hose
E-13
12418460-001
Transmission Oil Cooler Hose
E-13
12418460-002
Transmission Oil Cooler Hose
E-13
12418763
Lanyard Assembly
E-14
12420196
Lanyard Assembly
E-14
12420197-001
Non-Metallic Vent Air Hose
E-15
12420197-002
Non-Metallic Vent Air Hose
E-15
12420197-003
Non-Metallic Vent Air Hose
E-15
12420197-004
Non-Metallic Vent Air Hose
E-15
12420197-005
Non-Metallic Vent Air Hose
E-15
12420197-006
Non-Metallic Vent Air Hose
E-15
12420198-001
Non-Metallic Vent Air Hose
E-15
12420198-002
Non-Metallic Vent Air Hose
E-15
12420308-457
Personnel Heater Air Duct Hose
E-16
12420308-760
Personnel Heater Air Duct Hose
E-16
12420489
Block Seal
E-17
3256-H-1048
CTIS Seal Driver
E-18
3256-K-1051
Wheel Hub Grease Seal Driver
E-19
Dimmer Switch Test Wire
E-20

Purge Valve Tool
E-21

Change
Change 11
E-3
E-3

TM 9-2320-365-20-1

Section III. MANUFACTURED ITEMS

E-2. BRAKE ADJUSTING TOOL SUPPORT

Make the brake adjusting tool support from 0.134 in. (3.4 mm) flat steel stock according to the following instructions.
Refer to the parts list and Figure E-1. Brake Adjusting Tool Support for details.

Item
Part Number
Material Description
Size
Qty

1
N/A
Steel, ASTM A569 Sheet,
Hot Rolled

6.0 in. (152.4 mm) x 6.0 in. (152.4 mm) x 0.134
in. (3.4 cm)

2

Figure E-1. Brake Adjusting Tool Support

a. All dimensions are in inches (millimeters).
b. Cut steel sheet as shown by dimensions on Figure E-1. Brake Adjusting Tool Support.
c. De-burr and remove sharp edges.

E-4
E-4
Change
Change 11

TM 9-2320-365-20-1

E-3. BRAKE PLUNGER SEAL DRIVER

Figure E-2. Brake Plunger Seal Driver

a. All dimensions are in inches (millimeters).
b. Manufacture from round steel stock.
c. De-burr and remove sharp edges.

E-5
E-5

TM 9-2320-365-20-1

E-4. CAB SUPPORT TOOL

Make the cab support tool from .38 inch (.96 cm) flat steel stock and angle iron stock according to the following
instructions. Refer to the parts list and Figure E-3. Cab Support Tool Strut and Cab Rest for details.

Item
Part Number
Material Description
Size
Qty

1
N/A
Steel, Flat Bar
4.0 in. (10.2 cm) X 33.38 in. X (84.8 cm) X 0.38
in. (0.96 cm)

1

2
N/A
Steel, Flat Bar
4.0 in. (10.2 cm) X 12.0 in. (30.5 cm) X 0.38 in.
(0.96 cm)

1

3
N/A
Angle Iron
2.0 in. (5.1 cm) X 2.0 in. (5.1 cm) X 3.5 in. (8.9
cm)

2

4
H.S.105VW-1
Insulgrip, CSA 105 C

Figure E-3. Cab Support Tool Strut and Cab Rest

a. All dimensions are in inches (centimeters).
b. Cut cab support tool strut (1) from steel flat bar and bend to shape as shown in Figure E-3. Cab Support Tool
Strut and Cab Rest.
c. Cut cab support tool cab rest (2) from steel flat bar.
d. De-burr and remove sharp edges.

E-6
E-6

TM 9-2320-365-20-1

Figure E-4. Cab Support Tool Seat

e. Remove flange side of cab support tool seats (3) as shown in Figure E-4. Cab Support Tool Seat.
f. Cut cab support tool seats (3) L and (3) R according to dimensions and left\right orientation shown on Figure E-4.
Cab Support Tool Seat.
g. De-burr and remove sharp edges.

E-7
E-7

TM 9-2320-365-20-1

E-4. CAB SUPPORT TOOL (CONT)

Figure E-5. Cab Support Tool Seat Layout

h. Position and clamp cab support tool seats (3) L and (3) R together as shown by dimensions on Figure E-5. Cab
Support Tool Seat Layout.
i. Weld cab support tool seat (3) L to cab support tool seat (3) R as identified on assembly table and Figure E-5.
Cab Support Tool Seat Layout.
j. Position and clamp cab support tool seats (3) L and (3) R to cab support tool strut (1) as shown by dimensions
on Figure E-5. Cab Support Tool Seat Layout.
k. Weld items clamped in step (f) as shown in Figure E-5. Cab Support Tool Seat Layout.
l. De-burr and remove sharp edges.

E-8
E-8

TM 9-2320-365-20-1

Figure E-6. Cab Support Tool Assembly

m. Position and clamp cab support tool strut (1) to cab support tool cab rest (2) as shown by dimensions on Figure
E-6. Cab Support Tool Assembly, before insulgrip (4) is applied.
n. Weld cab support tool strut (1) to cab support tool cab rest (2).
o. Apply Insulgrip (4) to cab support tool cab rest (2) as described on material container.

E-9
E-9

TM 9-2320-365-20-1

E-5. HEADLIGHT ADJUSTMENT SCREEN

The headlight adjustment screen may be drawn on any vertical surface at least 50 in. (127 cm) high and 100 in. (254
cm) wide.

a. Draw two vertical lines (1) 50 in. (127 cm) high and 90.6 in. (230 cm) apart (centered on headlight adjustment
screen).

b. Locate two points 40 in. (101.6 cm) from floor and 13 in. (33 cm) toward the center from each vertical line (1).

c. Draw vertical line (2) about 3-5 in. (8-13 cm) centered on each of the two points.

d. Draw horizontal line (3) about 3-5 in. (8-13 cm) centered on each of the two points.

e. Measure out 4 in. (10 cm) along each vertical line (2) and horizontal line (3) from each of the two points to make
8 in. (20 cm) squares (4).

Figure E-7. Headlight Adjustment Screen

E-10
E-10

TM 9-2320-365-20-1

E-6. M1079 BLACKOUT SHIELD SEALS

Fabricate the M1079 blackout shield seals according to the following steps.
Refer to the following parts list for
materials.

Description
Material Part
Number

CAGE
Code

Cut Length

Blackout Shield Header Seal
942P00001
0SHR6
28-3/4 in. (730 mm)

Blackout Shield Jamb Seal (van body
serial numbers 001 through 190)

942P00001
0SHR6
63-3/8 in. (1610 mm)

Blackout Shield Jamb Seal (van body
serial number 191 and higher)

942P00001
0SHR6
33 in. (838 mm)

a. Dimensions are in inches (millimeters).
b. Cut seal material to the specified length using a
fine-toothed hacksaw or other suitable cutting tool.

E-7. M1079 DOOR GASKETS

Fabricate the M1079 door gaskets according to the following steps. Refer to the following parts list for materials.

Description
Material Part
Number

CAGE
Code

Cut Length

LH Door Gasket
12416417
19207
214 in. (5435 mm)

RH Door Gasket
12416417
19207
197 in. (5004 mm)

a. Dimensions are in inches (millimeters).
b. Cut seal material to the specified length using a
fine-toothed hacksaw or other suitable cutting tool.
c. Glue ends of gasket to each other using adhesive
MIL-A-46106 GP1TY1 (Item 11, Appendix D).

E-11
E-11

TM 9-2320-365-20-1

E-8. M1079 WINDOW SASH GLAZING SEALS

Fabricate the M1079 window sash glazing seals according to the following steps. Refer to the following parts list for
materials.

Description
Material Part
Number

CAGE
Code

Cut Length

Window Sash Top/Bottom Seal
941P00001
0SHR6
26-13/16 in. (681 mm)

Window Sash Side Seal (van body
serial numbers 001 through 190)

941P00001
0SHR6
28-1/2 in. (724 mm)

Window Sash Side Seal (van body
serial number 191 and higher)

941P00001
0SHR6
12-11/16 in. (322 mm)

a. Dimensions are in inches (millimeters).
b. Cut seal material to the specified length using a
fine-toothed hacksaw or other suitable cutting tool.

NOTE

Cut miters so that short side of seal faces
toward glass.

c. Cut 45-degree miters on ends of window sash seals.

E-9. RELAY TEST WIRE

Fabricate the relay test wire according to the following steps. Refer to the following parts list for materials.

Material Description
National Stock
Number

Cut Length

Wire, Electrical (MIL-W-16878)
6145-00-330-3318
6 in. (152 mm)

a. Dimensions are in inches (millimeters).
b. Cut a length of wire six inches (152 mm) long.
c. Remove approximately 3/4 in. (19 mm) of electrical insulation from each end of wire.

E-10. WHEEL BEARING SHIM TOOL REST

Fabricate the wheel bearing shim tool rest according to the following steps.
Refer to the following parts list for
materials.

Part Number
National Stock Number
Description

QQ-T-570
9510-00-866-1037
Bar, Metal

a. Dimensions are in inches (millimeters).
b. Cut metal bar to 9.0 inches (228.6 mm) long.
c. De-burr and remove sharp edges from ends of metal bar.

E-12
E-12

TM 9-2320-365-20-1

E-11. PNEUMATIC TUBES FABRICATION

Cut pneumatic tubes from bulk tubing stock listed Table E-1. Pneumatic Tube Lengths. Use a fine-toothed hacksaw
or suitable cutting device and cut tubing to required length.

Table E-1. Pneumatic Tube Lengths

Tube Part
Number

Bulk Tubing
Part Number

Cut Length

inches
cm

12414690-001
NT-100-4 (79470)
18.1
46.0

12414690-002
NT-100-4 (79470)
16.0
40.6

12414690-004
NT-100-4 (79470)
74.8
190.0

12414690-005
NT-100-4 (79470)
69.7
177.0

12414690-010
NT-100-4 (79470)
180.0
457.2

12414690-101
J844TYBSIZE 3/8 (81343)
18.0
45.7

12414690-102
J844TYBSIZE 3/8 (81343)
35.4
90.0

12414690-103
J844TYBSIZE 3/8 (81343)
20.9
53.0

12414690-104
J844TYBSIZE 3/8 (81343)
13.8
35.0

12414690-105
J844TYBSIZE 3/8 (81343)
11.8
30.0

12414690-106
J844TYBSIZE 3/8 (81343)
20.5
52.0

12414690-107
J844TYBSIZE 3/8 (81343)
39.0
99.0

12414690-108
J844TYBSIZE 3/8 (81343)
15.4
39.0

12414690-109
J844TYBSIZE 3/8 (81343)
23.0
58.4

12414690-112
J844TYBSIZE 3/8 (81343)
80.0
198.0

12414690-113
J844TYBSIZE 3/8 (81343)
11.4
29.0

12414690-115
J844TYBSIZE 3/8 (81343)
82.8
210.2

12414690-117
J844TYBSIZE 3/8 (81343)
156.5
397.5

12414690-118
J844TYBSIZE 3/8 (81343)
11.8
30.0

12414690-119
J844TYBSIZE 3/8 (81343)
269.5
684.5

12414690-120
J844TYBSIZE 3/8 (81343)
11.9
30.2

12414690-121
J844TYBSIZE 3/8 (81343)
43.0
109.2

12414690-122
J844TYBSIZE 3/8 (81343)
44.1
112.0

12414690-123
J844TYBSIZE 3/8 (81343)
259.4
659.0

12414690-124
J844TYBSIZE 3/8 (81343)
288.2
732.0

12414690-125
J844TYBSIZE 3/8 (81343)
10.8
27.3

12414690-126
J844TYBSIZE 3/8 (81343)
17.0
43.2

12414690-127
J844TYBSIZE 3/8 (81343)
17.0
43.2

E-13
E-13

TM 9-2320-365-20-1

E-11. PNEUMATIC TUBES FABRICATION (CONT)

Table E-1. Pneumatic Tube Lengths (Cont)

Tube Part
Number

Bulk Tubing
Part Number

Cut Length

inches
cm

12414690-201
C608-100BLK (13174)
14.8
37.5

12414690-202
C608-100BLK (13174)
14.0
35.7

12414690-203
C608-100BLK (13174)
6.5
16.5

12414690-205
C608-100BLK (13174)
14.5
36.8

12414690-206
C608-100BLK (13174)
14.9
37.7

12414690-207
C608-100BLK (13174)
15.5
39.5

12414690-208
C608-100BLK (13174)
6.7
17.0

12414690-209
C608-100BLK (13174)
19.5
49.5

12414690-210
C608-100BLK (13174)
15.5
39.3

12414690-211
C608-100BLK (13174)
8.0
20.3

12414690-212
C608-100BLK (13174)
16.9
43.0

12414690-213
C608-100BLK (13174)
118.5
301.0

12414690-214
C608-100BLK (13174)
124.0
315.0

12414690-215
C608-100BLK (13174)
163.0
414.0

12414690-216
C608-100BLK (13174)
160.0
406.4

12414690-217
C608-100BLK (13174)
62.6
159.0

12414690-218
C608-100BLK (13174)
119.8
304.2

12414690-219
C608-100BLK (13174)
69.0
175.3

12414690-220
C608-100BLK (13174)
45.5
115.6

12414690-221
C608-100BLK (13174)
12.6
32.0

12414690-222
C608-100BLK (13174)
5.5
14.0

12414690-223
C608-100BLK (13174)
14.6
37.1

12414690-224
C608-100BLK (13174)
170.0
431.8

12414690-225
C608-100BLK (13174)
174.0
442.0

12414690-226
C608-100BLK (13174)
103.5
263.0

12414690-227
C608-100BLK (13174)
32.8
83.2

12414690-228
C608-100BLK (13174)
3.5
8.9

12414690-229
C608-100BLK (13174)
62.2
158.1

12414690-230
C608-100BLK (13174)
14.6
37.0

12414690-231
C608-100BLK (13174)
60.5
153.7

12414690-301
PFT-10B-BLK-100 (61424)
19.0
48.3

12414690-302
PFT-10B-BLK-100 (61424)
56.0
142.2

12414690-303
PFT-10B-BLK-100 (61424)
118.1
300.0

E-14
E-14

TM 9-2320-365-20-1

E-12. NON-METALLIC ELECTRICAL CABLE CONDUIT FABRICATION

Make conduit to cover electrical cables described on 1241638 from bulk tube stock listed in Table E-2. Non-Metallic
Electrical Cable Conduit Lengths. Use a fine-toothed hacksaw or suitable cutting device and cut hose/tube to required
length.

Table E-2. Non-Metallic Electrical Cable Conduit Lengths

Tube Part Number
Bulk Tube Part Number

Cut Length

inch
cm

12416381P1
49008
8.9
22.6

12416381P10
49008
17.8
45.2

12416381P11
49008
29.9
75.9

12416381P12
49008
33.0
83.8

12416381P13
49008
13.9
35.3

12416381P14
49008
4.0
10.2

12416381P15
49008
17.4
44.2

12416381P16
49008
3.2
8.1

12416381P17
49008
4.5
11.4

12416381P2
49008
16.2
41.1

12416381P20
27413
32.8
83.3

12416381P21
27413
9.2
23.4

12416381P22
27413
8.0
20.3

12416381P23
27413
23.3
59.2

12416381P26
49008
2.5
6.4

12416381P3
27413
7.3
18.5

12416381P30
49007
17.0
43.2

12416381P32
49005
1.7
4.3

12416381P34
49005
20.7
52.6

12416381P35
49005
21.8
55.4

12416381P36
49005
5.5
14.0

12416381P37
49005
8.0
20.3

12416381P38
49008
3.7
9.4

12416381P4
49008
12.0
30.5

12416381P5
49008
26.0
66.0

12416381P6
49008
7.7
19.6

12416381P7
49008
26.7
67.8

12416381P8
49008
5.2
13.2

12416381P9
49008
16.8
42.7

E-15
E-15

TM 9-2320-365-20-1

E-13. STEERING GEAR RETURN HOSE AND TRANSMISSION OIL COOLER HOSES
FABRICATION

Cut the following hoses from bulk hose using a fine-toothed hacksaw or suitable cutting device.

Hose Part Number
Bulk Hose Part Number

Cut Length

inches
cm

12418037
A110 (30327)
75.5
191.7

12418460-001
MS521302B110360 (96906)
17.5
44.4

12418460-002
MS521301A206R (96906)
16.0
40.6

E-14. LANYARD ASSEMBLIES P/N 12418763 AND 12420196 FABRICATION

Make the following lanyard assemblies from bulk cable material, sleeves, and tab material and assemble according to
Figure E-8. Lanyard Assembly. The following parts list identifies part numbers and lengths of cut pieces.

Item
Part Number
Material Description
Size
Qty

1
MIL-W-83420 Type 1,
Comp B

1/16 in. stranded wire
cable

4 in. (102 mm)
1

2
MS51844-22
Sleeve
2

3
N/A
Tab, Stainless Steel ASTM
A617

.06 in. (16 cm) X .37 in. (9.5 mm) X 1.25
in. (32 mm)

1

E-16
E-16

TM 9-2320-365-20-1

Figure E-8. Lanyard Assembly

a. All dimensions are in inches (millimeters).
b. Make from bulk cable and flat steel material as identified in parts list.
c. Drill two 0.19 in. (4.8 mm) diameter holes through tab material as shown on Figure E-14. Lanyard Assembly.
d. De-burr and remove sharp edges.
e. Bend tab as shown on Figure E-14. Lanyard Assembly.
f. Form loops on cable ends and insert sleeve material over cable on one end of cable and over cable and through
sleeve at other end of cable as shown in Figure E-14. Lanyard Assembly.
g. Crimp two sleeves over cable ends.

E-17
E-17

TM 9-2320-365-20-1

E-15. NON-METALLIC VENT AIR HOSES FABRICATION

Cut the following vent air hoses from bulk hose using a fine-toothed hacksaw or suitable cutting device.

Hose Part Number
Bulk Hose Part Number

Cut Length

inches
cm

12420197-001
483666 (02280)
180.0
457.2

12420197-002
483666 (02280)
120.0
304.8

12420197-003
483666 (02280)
96.0
243.8

12420197-004
483666 (02280)
36.0
91.4

12420197-005
483666 (02280)
156.0
396.2

12420197-006
483666 (02280)
72.0
182.9

12420198-001
881-16 (98441)
120.0
304.8

12420198-002
11657469
36.0
91.4

E-16. PERSONNEL HEATER AIR DUCT HOSE FABRICATION

Cut the following hoses from bulk hose using a fine-toothed hacksaw or suitable cutting device.

Hose Part Number
Bulk Hose Part Number

Cut Length

inches
cm

12420308-457
8711054 (19207)
18.3
46.4

12420308-760
8711054 (19207)
30.4
77.2

E-17. BLOCK SEAL 12420489 FABRICATION

Make block seal from P/N (0VXY8) STN2.38X.5. Use a suitable cutting tool to cut seal to 0.52 inch (1.3 cm) long.

E-18
E-18

TM 9-2320-365-20-1

E-18. CTIS SEAL DRIVER 3256-H-1048

Used on Front and Rear Axle CTIS Seals.

Figure E-9. CTIS Seal Driver

a. All dimensions are in inches (millimeters).
b. Manufacture from round steel stock.
c. De-burr and remove sharp edges.

E-19
E-19

TM 9-2320-365-20-1

E-19. WHEEL HUB GREASE SEAL DRIVER 3256-K-1051

Figure E-10. Wheel Hub Grease Seal Driver

a. All dimensions are in inches (millimeters).
b. Manufacture from round steel stock.
c. De-burr and remove sharp edges.

E-20
E-20

TM 9-2320-365-20-1

E-20. DIMMER SWITCH TEST WIRE

Fabricate the dimmer switch test wire according to the following steps. Refer to the following parts list for materials.

Material Description
National Stock Number
Quantity
Cut Length

Wire, Electrical
(M168678/14BKE9)

6145-01-229-4134
1
12 in (305 mm)

Pin, Grooved, Headless
(12258939-1)

5315-01-156-6314
1

Contact, Electrical
(12258939-2)

5999-01-150-8808
1

a. Dimensions are in inches (millimeters).
b. Cut a length of electrical wire approximately 12 in. (305 mm) long.
c. Remove approximately 1/4 in. (6 mm) of insulation from each end of electrical wire.
d. Crimp headless grooved pin on one end of electrical wire.
e. Crimp electrical contact on opposite end of electrical wire.

Change
Change 11
E-21
E-21

TM 9-2320-365-20-1

E-21. PURGE VALVE TOOL

Fabricate Purge Valve Tool according to the following instructions. Refer to Figure E-11. Purge Valve Tool for details.

Item
Part Number
Material Description
Size
Qty

1
N/A
Steel, ASTM A 108 or A576 Grade 1015-1025, BAR
(Ref UNS G10150-G10250).
Finish Black Oxide Coat, Class I, IAW MIL-C-13924.

14.0 in. (356 mm)
1

Figure E-11. Purge Valve Tool

a. All dimensions are in inches (cm).
b. Cut steel bar (1) and bend to shape as shown in Figure E-11.
c. Dimensional limits apply after coating.
d. All edges shall be broken and free from burrs.
e. Metal Stamp, electro etch, or engrave with the following marking IAW MIL-STD-130: 19207-12379968 MFR-19207.

E-22
E-22
Change
Change 11

TM 9-2320-365-20-1

APPENDIX
APPENDIX FF
TORQUE
TORQUE LIMITS
LIMITS

F-1. GENERAL

This appendix provides general torque limits for screws and nuts used on the vehicle. Special torque limits are shown
in the maintenance procedures for applicable components. Use the general torque limit given in this appendix when
specific torque limits are not given in the maintenance procedure. These general torque limits can not be applied to
screws that retain rubber components. The rubber components will be damaged before the torque limit is reached.
If a special torque limit is not given in the maintenance instructions for a fastener which retains a rubber component,
tighten the screw or nut until it touches metal, then tighten one more turn. Whenever possible, the tightening force
(torque) should be applied to the nut side of the fastener group.

F-2. TORQUE LIMITS

Refer to Table F-1. Torque Limits for SAE and ANSI Fasteners for torque limits on standard (SAE and ANSI) screws
and free spinning nuts. Refer to Table F-2. Torque Limits for SAE and ANSI Prevailing Torque Nuts for torque
limits on standard (SAE and ANSI) self-locking nuts. Refer to Table F-3. Torque Limits for Metric Screws and Free
Spinning Nuts for torque limits on metric screws and free spinning nuts. Refer to Table F-4. Torque Limits for
Metric Prevailing Torque Nuts for torque limits on metric self-locking nuts.

F-3. USE OF TORQUE TABLES

(1) Measure the diameter of the screw to be installed.

(2) Count the number of threads per inch.

(3) Under the heading DIAMETER look down the column
until the diameter of the screw is found. (There are
usually two lines beginning with the same diameter.)

(4) Under the heading THREADS PER INCH (SAE and
ANSI) or THREAD PITCH (metric), find the number of
threads per inch that matches the number counted in
step (2).

(5) To find the grade of the screw, match the markings on
the head to the correct picture under CAPSCREW HEAD
MARKINGS on the torque table.

(6) Look down the column under the picture found in step
(5) until the torque limit (lb-ft or N·m) for the diameter
and threads per inch (or thread pitch, in the case of
metric fasteners) of the screw are located.

F-1
F-1

TM 9-2320-365-20-1

APPENDIX F
TORQUE LIMITS

Table F-1. Dry Torque Limits for SAE and ANSI Screws and Free Spinning Nuts

NOTE

Manufacturer’s marks
may vary. These are all
SAE Grade 5.

Material Grade Markings

SAE Grade 2
SAE Grade 5
SAE Grade 8

Diameter
Threads
per inch

Torque

inch
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

1/4
20
3-5
5-7
5-7
8-10
8-10
10-14

1/4
28
4-6
5-7
6-8
9-11
8-12
12-16

1/4
32
4-6
5-7
7-9
9-11
9-13
12-16

5/16
18
7-9
9-13
11-15
15-21
15-21
21-29

5/16
24
8-10
11-15
12-16
17-23
17-23
24-32

5/16
32
9-11
12-16
14-18
18-24
19-25
27-34

3/8
16
13-17
17-23
20-26
27-35
28-38
38-50

3/8
24
15-19
20-26
22-30
31-41
32-42
43-57

3/8
32
15-21
21-27
24-32
33-43
33-45
55-61

7/16
14
20-28
28-38
32-42
43-57
44-60
61-81

7/16
20
23-31
31-41
35-47
48-64
49-67
68-90

7/16
28
25-33
33-45
37-51
51-69
54-72
73-97

1/2
13
32-42
43-57
49-65
66-88
68-92
93-123

1/2
20
35-47
48-64
55-73
74-98
77-103
105-139

1/2
28
38-50
51-67
58-78
79-105
82-110
111-149

9/16
12
55-61
62-82
70-94
95-127
98-132
134-178

9/16
18
50-68
69-91
78-104
105-141
109-147
149-199

9/16
24
53-71
72-96
82-110
111-149
115-155
158-210

5/8
11
62-84
85-113
95-129
131-175
136-182
184-246

5/8
18
70-94
96-128
108-146
148-198
154-206
209-279

5/8
24
73-99
100-134
114-154
155-207
161-217
219-293

F-2
F-2

TM 9-2320-365-20-1

Table F-1. Dry Torque Limits for SAE and ANSI Screws and Free Spinning Nuts (Cont)

Manufacturer’s marks
may vary. These are all
SAE Grade 5

Material Grade Markings

SAE Grade 2
SAE Grade 5
SAE Grade 8

Diameter
Threads
per inch

Torque

inch
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

11/16
24
99-133
135-181
153-207
209-279
217-291
296-394

3/4
10
110-148
150-200
171-229
232-310
240-324
328-438

3/4
16
123-165
168-224
190-256
259-345
269-361
366-488

3/4
20
127-171
174-232
197-265
268-358
278-374
379-505

13/16
20
252-340
345-459
357-481
487-649

7/8
9
275-369
374-498
387-521
528-704

7/8
14
303-407
413-551
427-575
583-777

7/8
20
319-429
435-579
450-606
614-818

15/16
20
395-531
538-718
558-750
760-1014

1
8
411-553
560-748
581-781
792-1056

1
12
450-606
614-818
636-856
867-1155

1
20
483-649
658-878
681-917
929-1239

1-1/16
18
576-776
782-1044
813-1095
1109-1479

1-1/8
7
507-683
693-923
824-1108
1123-1497

1-1/8
12
570-766
776-1034
923-1241
1258-1678

1-1/8
18
600-806
817-1089
971-1307
1324-1766

1-3/16
18
709-953
966-1288
1149-1545
1566-2088

1-1/4
7
716-964
976-1302
1161-1563
1584-2112

1-1/4
12
793-1067
1081-1441
1286-1730
1754-2338

1-1/4
18
831-1117
1132-1510
1346-1812
1835-2447

1-5/16
18
965-1299
1316-1754
1565-2105
2134-2846

1-3/8
6
939-1263
1281-1707
1523-2049
2076-2768

F-3
F-3

TM 9-2320-365-20-1

APPENDIX F
TORQUE LIMITS

Table F-2. Dry Torque Limits for SAE and ANSI Prevailing Torque Nuts

Material Grade Markings

SAE Grade 5
SAE Grade 8

Hole
Diameter

Threads
per inch

Torque

inch
lb-ft
N·m
lb-ft
N·m

1/4
20
10-12
14-16
15-17
20-24

1/4
28
12-14
16-18
14-18
21-25

5/16
18
20-24
27-33
26-32
36-44

5/16
24
22-26
30-36
29-35
40-48

3/8
16
35-41
47-55
48-58
65-77

3/8
24
38-46
53-63
53-63
72-86

7/16
14
55-65
74-88
75-91
103-123

7/16
20
60-70
81-97
80-98
110-132

1/2
13
86-102
116-138
113-137
154-184

1/2
20
92-110
125-149
127-153
177-207

9/16
12
120-144
162-194
168-202
229-273

9/16
18
135-161
183-219
179-217
244-294

5/8
11
165-199
226-270
226-272
306-368

5/8
18
181-219
246-296
244-296
331-401

3/4
10
296-354
402-480
395-479
538-648

3/4
16
310-376
422-508
424-516
576-698

7/8
9
460-554
625-749
612-746
833-1009

7/8
14
503-607
684-822
652-800
888-1082

1
8
686-828
933-1121
941-1141
1280-1544

F-4
F-4

TM 9-2320-365-20-1

Table F-3. Dry Torque Limits for Metric Screws and Free Spinning Nuts

Material Grade Markings

Metric Grade 4.8
Metric Grade 8.8
Metric Grade 10.9
Metric Grade 12.9

Diameter
Thread
Pitch

Torque

mm
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

6
1
3
4-5
5-7
7-9
7-9
10-13
8-11
11-15

8
1.25
7-9
9-11
13-17
17-23
17-23
23-31
21-27
27-37

8
1
7-9
9-13
14-18
18-24
19-25
25-33
21-29
29-39

10
1.5
13-17
17-23
25-33
33-45
34-46
46-62
40-54
54-72

10
1.25
14-18
18-24
26-34
35-47
36-48
49-65
42-56
57-77

10
0.75
15-19
21-27
29-39
39-53
40-54
54-72
47-63
63-85

12
1.75
22-30
30-40
43-57
58-78
60-80
81-107
69-93
94-126

12
1.5
23-31
32-42
46-60
61-81
63-83
85-113
73-97
99-131

12
1.25
24-32
33-45
47-63
65-85
65-87
88-118
76-102
104-138

12
1
26-34
34-46
49-65
67-89
68-90
93-123
80-106
108-144

14
2
36-48
48-74
69-91
93-125
95-127
129-173
112-148
151-201

14
1.5
39-51
52-70
75-99
99-135
103-137
140-186
120-160
163-217

15
1
51-69
69-93
100-132
135-179
137-183
187-249
160-214
218-290

16
2
55-73
75-99
107-143
145-193
148-198
201-267
173-231
235-313

16
1.5
59-79
80-106
114-152
155-207
158-210
214-286
184-246
250-334

18
1.5
166-222
225-301
230-306
311-415
268-358
364-486

20
2.5
209-279
283-377
289-385
392-522
338-450
458-610

20
1.5
232-308
315-419
321-427
435-579
375-499
508-678

20
1
244-324
330-440
337-449
457-609
394-524
534-712

22
2.5
285-379
387-515
394-524
534-712
461-613
624-832

22
1.5
313-417
424-566
432-576
586-782
664-884
900-1200

24
3
361-481
489-653
499-665
677-903
584-778
791-1055

24
2
394-524
534-712
545-725
738-984
725-965
982-1310

25
1.5
467-621
633-843
645-859
875-1167
754-1004
1023-1363

F-5
F-5

TM 9-2320-365-20-1

APPENDIX F
TORQUE LIMITS

Table F-4. Dry Torque Limits for Metric Prevailing Torque Nuts

Material Grade Markings

Metric Grade 4.8
Metric Grade 8.8
Metric Grade 10.9
Metric Grade 12.9

Diameter
Thread
Pitch

Torque

mm
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

6
1
5-6
7-8
7-9
10-12
10-12
14-17
11-14
15-19

8
1.25
12-14
16-18
18-22
24-30
24-30
32-40
27-33
36-46

8
1
12-14
16-20
19-23
25-31
25-31
34-42
28-36
38-48

10
1.5
21-25
28-34
33-41
44-56
44-56
60-76
50-64
68-86

10
1.25
21-25
29-35
34-42
46-58
46-58
63-79
53-67
71-91

10
0.75
23-27
31-37
37-47
49-63
50-64
68-86
57-73
77-99

12
1.75
33-41
46-56
55-69
74-94
75-95
102-128
85-109
115-147

12
1.5
35-43
47-57
56-72
77-97
78-98
106-134
89-113
120-152

12
1.25
36-44
48-60
58-74
79-101
81-103
109-139
91-117
125-159

12
1
37-45
50-62
61-77
82-104
84-106
114-144
95-121
129-165

14
2
53-65
72-88
87-109
117-149
118-150
160-204
134-172
182-232

14
1.5
57-69
76-94
92-116
125-159
126-160
171-217
143-183
194-248

16
2
79-97
107-131
130-166
177-225
178-228
243-309
204-262
277-355

16
1.5
82-102
112-138
138-176
187-239
189-241
256-328
215-277
292-376

18
1.5
197-253
267-343
271-347
367-471
309-399
420-542

20
2.5
248-318
337-431
342-438
464-594
391-503
530-682

20
1.5
271-349
369-473
374-480
507-651
428-552
580-750

20
1
283-365
384-494
390-502
529-681
447-577
606-784

22
2.5
335-429
455-583
460-592
624-802
526-680
714-922

22
1.5
363-467
492-634
499-643
676-872
730-950
990-1290

24
3
420-540
569-733
577-743
783-1009
662-856
897-1161

24
2
453-583
614-792
622-804
844-1090
803-1043
1088-1416

F-6
F-6

TM 9-2320-365-20-1

Table
Table F-5.
F-5. Wet
Wet Torque
Torque Limits
Limits for
for SAE
SAE and
and ANSI
ANSI Screws
Screws and
and Free
Free Spinning
Spinning Nuts
Nuts

NOTE

Manufacturer’s marks
may vary. These are all
SAE Grade 5.

Material Grade Markings

SAE Grade 2
SAE Grade 5
SAE Grade 8

Diameter
Threads
per inch

Torque

inch
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

1/4
20
4
6
6
8
9
12

1/4
28
5
7
7
9
10
14

5/16
18
8
11
13
18
18
24

5/16
24
9
12
14
19
20
27

3/8
16
15
20
23
31
35
47

3/8
24
17
23
25
34
35
47

7/16
14
24
33
35
47
55
75

7/16
20
25
34
40
54
60
81

1/2
13
35
47
55
75
80
108

1/2
20
40
54
65
88
90
122

9/16
12
50
68
80
108
110
149

9/16
18
55
75
90
122
130
176

5/8
11
70
95
110
149
170
231

5/8
18
80
108
130
176
180
244

3/4
10
120
163
200
271
280
380

3/4
16
140
190
220
298
320
434

7/8
9
110
149
300
407
460
624

7/8
14
120
163
320
434
500
678

1
8
160
217
440
597
680
922

1
12
170
231
480
651
740
1003

1-1/8
7
220
298
600
814
960
1302

1-1/8
12
260
353
660
895
1080
1464

F-7
F-7

TM 9-2320-365-20-1

APPENDIX F
TORQUE LIMITS

Table F-5. Wet Torque Limits for SAE and ANSI Screws and Free Spinning Nuts (Cont)

Manufacturer’s marks
may vary. These are all
SAE Grade 5

Material Grade Markings

SAE Grade 2
SAE Grade 5
SAE Grade 8

Diameter
Threads
per inch

Torque

inch
lb-ft
N·m
lb-ft
N·m
lb-ft
N·m

1-1/4
7
320
434
840
1139
1360
1844

1-1/4
12
360
488
920
1248
1500
2034

1-3/8
6
420
570
1100
1492
1780
2414

1-3/8
12
460
624
1260
1709
2040
2766

F-8
F-8

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Change 2 G-1

APPENDIX G
MANDATORY REPLACEMENT PARTS

Section I. INTRODUCTION

G-1. SCOPE

This appendix lists mandatory replacement parts you will need to maintain the LMTV vehicle.

G-2. EXPLANATION OF COLUMNS

a.Column (1) - Item Number.
This number is assigned to each entry in the listing and is
referenced in the Initial Setup of the applicable task under
Materials/Parts.

b.Column (2) - Nomenclature.
Name or identification of the part.

c.Column (3) - Part Number.
The manufacturer's part number.

d.Column (4) - National Stock Number.
The National stock number of the part.

Section II. MANDATORY REPLACEMENT PARTS LIST

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

1
BLADE, WINDSHIELD WIPER
105.384
2540-01-364-1621

2
BOLT, MACHINE
12414307-065
5306-01-382-5054

3
BOOT KIT, EXHAUST
DQ6025
4730-01-417-3197

4
BUMPER, RUBBER
12419182
5340-01-410-8397

5
BUSHING, SLEEVE
7-199-002668
3120-01-367-6894

6
CHANNEL, RUBBER
ZZR765/2-001A7
9390-01-420-4560

7
CLAMP
12421183-005
4730-01-447-4312

8
CLAMP
12421183-006
4730-01-447-4313

9
DECAL
12340917
7690-01-256-4909

10
FASTENER TAPE
MIL-F-21840
8315-00-006-9855

11
FASTENER TAPE
50-534718-19
8315-00-935-6762

12
FILTER ASSEMBLY
75223-11
2940-01-417-9333

13
FILTER ELEMENT
1048011
2940-01-385-8931

14
FILTER ELEMENT, FLUID
R22146
2910-01-360-6366

14.1
FILTER ELEMENT, FLUID
ST117073098-000
2910-01-467-4594

15
FILTER ELEMENT, FLUID
29507750
2940-01-361-2406

16
FILTER ELEMENT, FLUID
599791
4460-01-284-2344

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.

(2)
NOMENCLATURE

(3)
PART NUMBER

(4)
NATIONAL STOCK
NUMBER

17
FILTER ELEMENT, FLUID
931558
2940-01-363-4377

18
FILTER ELEMENT, INTAKE AIR CLEANER
P52-7750
2940-01-361-2407

19
FILTER, AIR
12416539

20
FILTER, AIR
12416563
4730-01-398-5654

21
FILTER, FUEL
7E9763
2940-01-363-3089

22
FILTER, OIL
1R0739
2940-00-029-0388

23
GASKET
F337576M6

24
GASKET
M28840/24HA
5935-01-421-9754

25
GASKET
QS-1181
5330-01-058-3788

26
GASKET
10-36675-18
5330-00-298-0190

26.1
GASKET
11446
5330-00-247-4174

27
GASKET
119-2940
5330-01-424-7905

28
GASKET
12421469
5330-01-453-2980

29
GASKET
12422254

30
GASKET
13848
5330-01-211-0717

31
GASKET
350700
5330-01-295-3053

32
GASKET
350903
5330-00-576-4626

33
GASKET
352200
5330-01-421-6105

34
GASKET
352302
5330-01-421-6107

35
GASKET
353400
5330-01-421-6102

36
GASKET
353806
5330-01-421-6103

37
GASKET
353810
5330-01-450-6666

38
GASKET
355148
5330-01-423-0596

39
GASKET
355175
5330-01-423-0623

40
GASKET
3K3257
5330-01-305-6550

40.1
GASKET
3N4087
5330-01-061-8003

41
GASKET
4P1624
5330-01-360-5934

42
GASKET
9Y8103
5330-01-360-5931

42.1
GASKET AND PREFORMED PACKING SET
9X8318
5330-01-360-9098

43
GASKET, FUEL FILTER
7C1159
5330-01-360-5941

44
NOT USED

G-2
Change 1

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Change 2 G-3

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

45
GASKET, THERMOSTAT
2W7212
5330-01-347-3206

46
GROMMET, NONMETALLIC
MS35489-6
5325-00-263-6632

47
GROMMET, NONMETALLIC
12417598
5325-01-375-1299

48
GROMMET, NONMETALLIC
12421402
5325-01-440-2178

49
GROMMET, NONMETALLIC
4082-37634-01
5325-01-194-3076

50
GROMMET, NONMETALLIC
50S12-1-1AA
5325-01-145-0105

51
GROMMET, NONMETALLIC
8741442
5325-00-088-6147

51.1
HEAD, FLUID FILTER
7632-002-144
2940-01-387-4397

52
INSULATOR, TANK
A1394J
5970-01-385-7317

53
INSULATOR, TANK
A1394K
5970-01-385-7262

54
KIT, FILTER
29503829

55
KIT, FILTER
29526899
5330-01-453-0770

56
NOT USED

57
LAMP, INCANDESCENT
CM7-7373
6240-00-270-6824

58
LAMP, INCANDESCENT
CM7376
6240-00-499-6278

59
LATCH, BAIL HEAD
68-20-101-10
2540-01-232-2470

60
LOCKNUT
0770-023-003
5310-01-423-3725

61
LOCKWASHER
ABCH207-LW-1/2

62
LOCKWASHER
ABCH207-LW-3/8

63
LOCKWASHER
B7949000161

64
LOCKWASHER
D70336/1-20
5310-01-110-7933

65
LOCKWASHER
D70336/3-50
5310-01-439-2542

66
LOCKWASHER
D70336/3-52
5310-01-439-2543

66.1
LOCKWASHER
MS35333-78
5310-01-110-7953

66.2
LOCKWASHER
ERNA245
5310-00-584-5272

67
LOCKWASHER
MS35335-30
5310-00-209-0788

68
LOCKWASHER
MS35335-31
5310-00-596-7693

69
LOCKWASHER
MS35335-33
5310-00-209-0786

70
LOCKWASHER
MS35335-36
5310-00-550-3503

71
LOCKWASHER
MS35335-38
5310-00-616-6354

72
LOCKWASHER
MS35335-58
5310-00-209-1366

73
LOCKWASHER
MS35335-61
5310-00-527-3634

74
LOCKWASHER
MS35335-62
5310-00-184-9562

TM 9-2320-365-20-1

G-4
Change 2

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

75
LOCKWASHER
MS35337-25
5310-00-013-8502

76
LOCKWASHER
MS35338-100
5310-00-261-8278

77
LOCKWASHER
MS35338-102
5310-00-167-0671

78
LOCKWASHER
MS35338-103
5310-00-184-8971

79
LOCKWASHER
MS35338-135
5310-00-933-8118

80
LOCKWASHER
MS35338-136
5310-00-929-6395

81
LOCKWASHER
MS35338-137
5310-00-933-8119

82
LOCKWASHER
MS35338-138
5310-00-933-8120

83
LOCKWASHER
MS35338-139
5310-00-933-8121

84
LOCKWASHER
MS35338-140
5310-00-974-6623

85
LOCKWASHER
MS35338-141
5310-00-984-7042

86
LOCKWASHER
MS35338-143
5310-00-933-8778

87
LOCKWASHER
MS35338-158
5310-00-883-9417

88
LOCKWASHER
MS35338-171
5310-01-130-9066

89
LOCKWASHER
MS35338-42
5310-00-045-3299

90
LOCKWASHER
MS35338-43
5310-00-045-3296

91
LOCKWASHER
MS35338-45
5310-00-407-9566

92
LOCKWASHER
MS35338-46
5310-01-334-4710

93
LOCKWASHER
MS35338-51
5310-00-584-7888

94
LOCKWASHER
MS35340-44
5310-00-682-5930

95
LOCKWASHER
MS51414-1
5310-01-235-2057

96
LOCKWASHER
MS51414-2
5310-01-310-1098

97
LOCKWASHER
MS51848-50
5310-01-033-8615

98
LOCKWASHER
N9015
5310-01-369-6073

99
LOCKWASHER
N9018
5310-01-032-4827

100
LOCKWASHER
N9459
5310-01-348-8393

101
LOCKWASHER
N9461
5310-01-348-8392

101.1
LOCKWASHER
XP1113
5310-01-460-5991

101.2
LOCKWASHER
10241
5310-01-416-3010

101.3
LOCKWASHER
10030

102
LOCKWASHER
1229-S-513C
5310-01-062-3384

102.1
LOCKWASHER
12414570-011
5310-01-374-3292

TM 9-2320-365-20-1

Change 2 G-5

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

102.2
LOCKWASHER
12414570-013
5310-01-374-4515

103
LOCKWASHER
12414570-015
5310-01-388-2043

103.1
LOCKWASHER
12414570-019
5310-01-470-2362

104
LOCKWASHER
12414570-021
5310-01-374-4516

105
LOCKWASHER
MS35338-40
5310-00-543-2410

106
LOCKWASHER
MS35338-47
5310-00-550-3741

107
NOT USED

108
LOCKWASHER
1729B262
5310-00-964-7811

109
NOT USED

110
NUT, BLIND RIVET
MS27130-S136
5310-01-409-4435

111
NUT, BLIND RIVET
MS27130-S148
5310-01-370-5548

112
NUT, BLIND RIVET
12421403-060

113
NUT, BLIND RIVET
12421403-065

114
NUT, BLIND RIVET
12421634-017

115
NUT, BLIND RIVET
12442158-5

115.1
NUT, PLAIN, ROUND
1727N40
5310-00-123-2572

116
NUT, SELF-LOCKING
DIN-934STM6
5310-01-342-2739

117
NUT, SELF-LOCKING
MS16228-10C
5310-00-245-8826

118
NUT, SELF-LOCKING
MS16228-5C
5310-00-584-7992

119
NUT, SELF-LOCKING
MS20500-524
5310-00-208-4023

120
NUT, SELF-LOCKING
MS21042-04
5310-00-811-6419

121
NUT, SELF-LOCKING
MS21042-5
5310-00-807-1469

122
NUT, SELF-LOCKING
MS21044C08
5310-00-982-6814

122.1
NUT, SELF-LOCKING
MS21045L5
5310-00-857-5559

123
NUT, SELF-LOCKING
MS21083N08
5310-00-941-6019

124
NUT, SELF-LOCKING
MS21083N6
5310-00-926-1852

125
NUT, SELF-LOCKING
MS51922-1
5310-00-088-1251

126
NUT, SELF-LOCKING
MS51922-2
5310-00-929-1807

127
NUT, SELF-LOCKING
MS51922-33
5310-00-225-6993

128
NUT, SELF-LOCKING
MS51922-5
5310-00-959-7600

129
NUT, SELF-LOCKING
N9406
5310-01-362-6171

130
NUT, SELF-LOCKING
N9410
5310-01-348-8398

TM 9-2320-365-20-1

G-6
Change 2

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

130.1
NUT, SELF-LOCKING
N9453
5310-01-348-8314

131
NUT, SELF-LOCKING
N9467
5310-01-350-4257

131.1
NUT, SELF-LOCKING
N9556
5310-01-423-0880

132
NUT, SELF-LOCKING
12301125
5310-01-210-0199

132.1
NUT, SELF-LOCKING
12411174-008

133
NUT, SELF-LOCKING
12412476-04
5310-01-466-0565

134
NUT, SELF-LOCKING
12414308-002
5310-01-381-2819

135
NUT, SELF-LOCKING
12414308-003
5310-01-377-1549

136
NUT, SELF-LOCKING
12414308-004
5310-01-369-5703

137
NUT, SELF-LOCKING
12414308-007
5310-01-046-0186

138
NUT, SELF-LOCKING
12414308-017
5310-01-381-9830

139
NUT, SELF-LOCKING
12414308-018
5310-01-369-3337

140
NUT, SELF-LOCKING
12414308-019
5310-01-369-9522

141
NUT, SELF-LOCKING
12414308-020
5310-01-381-9849

142
NUT, SELF-LOCKING
12414308-021
5310-01-369-3338

143
NUT, SELF-LOCKING
12414308-022
5310-01-417-1262

144
NUT, SELF-LOCKING
12414308-025
5310-01-367-6706

145
NUT, SELF-LOCKING
12414308-027
5310-01-369-3339

146
NUT, SELF-LOCKING
12414315-003
5310-01-374-1382

147
NUT, SELF-LOCKING
12414315-005
5310-01-372-3023

148
NUT, SELF-LOCKING
12414315-006
5310-01-369-3332

149
NUT, SELF-LOCKING
12414315-009
5310-01-365-7236

150
NUT, SELF-LOCKING
12414315-012
5310-01-369-3331

151
NUT, SELF-LOCKING
12414315-017
5310-01-368-8065

152
NUT, SELF-LOCKING
12414420-004
5310-01-370-0010

152.1
NUT, SELF-LOCKING
12417642-002
5310-01-374-3288

153
NUT, SELF-LOCKING
12419003
5310-01-376-0773

154
NUT, SELF-LOCKING
270W10000

155
NUT, SELF-LOCKING
29514660

156
NUT, SELF-LOCKING
7951286
5310-00-789-0398

157
PACKING, PREFORMED
A82777
5330-00-579-6495

158
PACKING, PREFORMED
F4001-16
5331-01-466-0354

158.1
PACKING, PREFORMED
J515-16-3
5331-01-465-3634

TM 9-2320-365-20-1

Change 2 G-7

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

158.2
PACKING, PREFORMED
J515-4-1
5331-01-387-9490

159
PACKING, PREFORMED
J515-8-1
5330-00-292-8171

160
PACKING, PREFORMED
5999807
5331-01-456-9156

161
PACKING, PREFORMED
MS28775-011
5330-00-582-2133

162
PACKING, PREFORMED
MS28775-227
5330-00-576-9731

162.1
PACKING, PREFORMED
MS28775-910
5331-00-448-6753

163
PACKING, PREFORMED
MS28778-10
5330-00-285-9842

164
PACKING, PREFORMED
MS28778-12
5330-00-251-8839

165
PACKING, PREFORMED
MS28778-16
5330-00-816-3546

166
PACKING, PREFORMED
MS28778-4
5330-00-805-2966

166.1
PACKING, PREFORMED
MS28778-6
5331-00-804-5695

167
PACKING, PREFORMED
MS9955-113
5330-01-374-2325

168
PACKING, PREFORMED
M25988/1-246
5330-01-189-6351

168.1
PACKING, PREFORMED
M83461/1-442
5330-01-183-0987

169
PACKING, PREFORMED
OR42OA
5330-01-389-6028

170
PACKING, PREFORMED
11639519-1
5330-00-463-0200

170.1
PACKING, PREFORMED
12422548-004
5331-01-059-1141

171
PACKING, PREFORMED
1509
5330-00-172-1919

171.1
PACKING, PREFORMED
195045
5331-00-618-5361

171.2
PACKING, PREFORMED
19755
5331-01-415-9632

171.3
PACKING, PREFORMED
198336
5331-00-584-1840

172
PACKING, PREFORMED
2M4453
5330-00-074-3768

173
PACKING, PREFORMED
22617-16
5330-01-168-0885

174
PACKING, PREFORMED
23043446
5330-01-424-6629

174.1
PACKING, PREFORMED
250192
5331-01-417-5105

174.2
PACKING, PREFORMED
251216
5330-01-417-5107

175
PACKING, PREFORMED
29500969
5330-01-360-7852

176
PACKING, PREFORMED
29503383
5330-01-360-6017

177
PACKING, PREFORMED
3-906N522-90
5330-01-104-1093

178
PACKING, PREFORMED
3-908N522-90
5330-00-929-8171

179
PACKING, PREFORMED
3D2824
5330-00-944-8281

180
PACKING, PREFORMED
3J1907
5330-01-333-6444

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.

(2)
NOMENCLATURE

(3)
PART NUMBER

(4)
NATIONAL STOCK
NUMBER

181
PACKING, PREFORMED
3J7354
5330-00-954-8008

182
PACKING, PREFORMED
3K0360
5330-00-948-6482

183
PACKING, PREFORMED
4J5477
5330-00-855-8059

184
PACKING, PREFORMED
4L9564
5330-00-828-8639

184.1
PACKING, PREFORMED
420828
5340-01-417-3788

185
PACKING, PREFORMED
5-X-1155
5330-01-392-1637

186
PACKING, PREFORMED
5F7054
5330-00-339-6224

187
PACKING, PREFORMED
5P7813
5330-01-335-0042

188
PACKING, PREFORMED
6V8397
5330-00-579-6495

189
PACKING, PREFORMED
673268

190
PACKING, PREFORMED
673269
5330-01-395-1252

191
PACKING, PREFORMED
7F8267
5330-01-291-7353

192
PACKING, PREFORMED
7320658
5330-00-297-7106

193
PACKING, PREFORMED
9604792-001
5330-01-429-3089

194
PAD, CUSHIONING
12416479-001
2590-01-397-7844

195
PAD, CUSHIONING
12416479-002
2590-01-412-2663

196
PARTS KIT, DEHYDRATOR
RN-60-A
4440-01-337-7324

197
PARTS KIT, SEAL REPLACEMENT
SK10-2
5330-01-350-4474

198
PARTS KIT, SEAL REPLACEMENT
SK10-3
5330-01-350-4472

199
PARTS KIT, SEAL REPLACEMENT
SK10-4
5330-01-343-2745

200
PIN, COTTER
K-2412-Z
5315-01-179-9882

201
PIN, COTTER
MS171659
5315-00-846-8337

202
PIN, COTTER
MS24665-151
5315-00-815-1405

203
PIN, COTTER
MS24665-298
5315-00-234-1861

204
PIN, COTTER
MS24665-385
5315-00-187-9382

205
PIN, COTTER
MS24665-423
5315-00-013-7228

206
PIN, COTTER
MS24665-457
5315-00-187-9393

207
PIN, COTTER
MS24665-459
5315-00-187-9394

208
PIN, COTTER
MS24665-69
5315-00-828-8190

208.1
PIN, COTTER
XB-781-1
5315-01-369-1346

209
NOT USED

G-8
Change 1

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Change 2 G-9

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

210
PIN, SPRING
MS16562-142
5315-00-058-6115

211
PIN, SPRING
MS16552-146
5315-00-853-3814

212
PLASTIC STRIP
352700
5330-01-296-2109

213
RECEPTACLE
50R4-1-1AA
5325-01-049-2049

213.1
REPAIR KIT, GOVERNOR
RN32W

213.2
RETAINER, PACKING
11863-012
5330-01-417-7795

213.3
RETAINER, PACKING
202624
5330-01-417-7794

214
RETAINER
A-1205-D-2344
5330-01-360-5253

215
RIVET, BLIND
AK42H
5320-00-874-4477

216
RIVET, BLIND
AK43H
5320-00-143-6149

217
RIVET, BLIND
MS20600AD5W12
5320-01-047-0467

217.1
RIVET, BLIND
MS20601B4W2
5320-00-616-5274

218
RIVET, BLIND
MS20604B3W2
5320-00-721-9075

219
RIVET, BLIND
M24243/1-A806
5320-00-850-3256

220
RIVET, BLIND
M24243/1-B302
5320-00-999-0397

221
RIVET, BLIND
M24243/1-D502
5320-00-850-3248

222
RIVET, BLIND
M24243/1-D608
5320-00-850-3246

223
RIVET, BLIND
M24243/1-F402
5320-00-129-9706

223.1
RIVET, BLIND
M24243/1-F608
5320-01-392-0699

223.2
RIVET, BLIND
M24243/1-F610

224
RIVET, BLIND
M24243/6-A403H
5320-00-882-8388

225
RIVET, BLIND
M24243/6-A405H
5320-01-291-9121

226
RIVET, BLIND
M24243/6-A406H
5320-01-421-0484

227
RIVET, BLIND
M24243/6-A602H
5320-00-956-7362

228
RIVET, BLIND
M24243/6-A604H
5320-00-956-7355

229
RIVET, BLIND
M24243/6-A606H
5320-00-882-8385

230
RIVET, BLIND
M24243/6-A608H
5320-01-032-6534

231
RIVET, BLIND
M24243/7-A402H
5320-00-874-4477

232
RIVET, BLIND
M24243/7-A403H
5320-00-143-6149

233
RIVET, BLIND
M24243/7-A604H
5320-00-420-2165

234
RIVET, BLIND
M24243/7-A606H
5320-00-490-5523

TM 9-2320-365-20-1

G-10
Change 2

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

235
RIVET, BLIND
SD64BSLF
5320-01-397-3347

236
RIVET, BLIND
206057
5320-01-411-0081

237
RIVET, COMPRESSION
12418469
5320-01-376-0699

237.1
SCREW, CAP
CSH5-24-39
5305-01-479-7857

238
SCREW, CAP
12414475-131
5303-01-363-0703

239
SCREW, CAP
6V-2315
5306-01-433-4753

240
SCREW, MACHINE
MS24693-144

241
SCREW, MACHINE
MS51958-83
5305-00-071-2095

242
SCREW, SELF-LOCKING
MS16998-61L
5305-01-211-3097

243
SEAL
VC08G1R0B
5330-01-389-6109

244
SEAL
12421431
9320-01-398-6317

245
SEAL
125128-5

246
SEAL
125128-6

247
SEAL
355150
5330-01-423-0689

247.1
SEAL
12422401-001
5999-01-478-5940

247.2
SEAL
12422401-002
5999-01-478-5932

247.3
SEAL
12422401-003
5999-01-478-5937

248
SEAL ASSEMBLY, CTIS
A1205-Q-2435
5330-01-360-7753

249
SEAL ASSEMBLY, HUB
A1205-R-2254
5330-01-360-5252

250
SEAL, DOOR
12416467
5330-01-385-3769

251
SEAL RING, METAL
29505809
5330-01-360-5329

252
SEAL, NONMETALLIC
CC3550
5330-01-431-7575

253
SEAL, NONMETALLIC
12417725
5330-01-375-2908

254
SEAL, NONMETALLIC
2418974-1
5330-01-257-1709

255
SEAL, NONMETALLIC
673999
5310-01-454-5553

255.1
SEAL, PLAIN
N72143
5330-01-453-4462

255.2
SEAL, SHAFT
SERUR25-2
5330-01-135-3376

256
SEAL, URETHANE FOAM
12420420-001
5680-01-453-8912

257
SEAL, URETHANE FOAM
12420420-002
5680-01-453-8485

258
SEAL, URETHANE FOAM
12420420-003
5680-01-453-8486

259
SEAL, WEATHER
147P00039

259.1
SPACER
12422545
5365-01-490-6790

TM 9-2320-365-20-1

Change 2 G-11/(G-12 Blank)

Section II. MANDATORY REPLACEMENT PARTS LIST (CONT)

(1)
ITEM NO.
(2)
NOMENCLATURE
(3)
PART NUMBER
(4)
NATIONAL STOCK
NUMBER

260
SPACER, RING
4P2987
5365-01-433-8407

260.1
SPIDER, UNIVERSAL JOINT, VEHICULAR
R279X

261
SPLICE, CONDUCTOR
12420927-001
5940-01-456-1319

262
SPLICE, CONDUCTOR
12420927-002
5940-01-421-6955

263
STRAIN RELIEF
10280870-3
5975-00-376-1585

263.1
STRIP, RUBBER
12412581
9320-01-399-4888

264
TERMINAL, LUG
MS20659-163
5940-00-113-3145

265
TERMINAL, LUG
MS20659-164
5940-00-113-3148

266
TERMINAL, LUG
MS25036-108
5940-00-143-4780

267
TERMINAL, LUG
MS25036-122
5940-00-113-8190

268
TERMINAL, LUG
12414275-001

269
TERMINAL, LUG
12416409-006

269.1
TERMINAL, LUG
12420344
5940-01-082-3321

270
WASHER, FLAT
MS27183-10
5310-00-809-4058

270.1
WASHER, FLAT
12414473-010
5310-01-374-6990

271
WASHER, FLAT
12417948-004
5365-01-436-8308

271.1
WASHER, FLAT
251391
5310-01-417-1041

272
WASHER, FLAT RUBBER
900.032
5330-01-378-7541

273
WASHER, NYLON
MS51859-16
5310-00-964-7811

274
WASHER, SPRING
D63474/1-30
5310-01-413-8475

275
WASHER, SPRING
WW579S18

276
WASHER, SPRING
110 7289
5310-01-246-1387

277
WASHER, SPRING
12414559-021
5310-01-374-4517

278
WASHER, SPRING
12414560-017
5310-01-395-0820

279
WASHER, SPRING
12414560-018
5310-01-381-3281

280
WASHER, SPRING
12414560-019
5310-01-369-6074

281
WASHER, SPRING
12417503
5310-01-406-6326

282
WASHER, SPRING
12418220
5310-01-372-3495

283
WASHER, SPRING
12414560-009
5310-01-333-5517

TM 9-2320-365-20-1

Change 2
H-1

APPENDIX H
LUBRICATION ORDER AND SERVICES

SECTION I. INTRODUCTION

H-1. GENERAL

The information contained in this appendix provides the lubrication/services requirements for the LMTV vehicle.

a.
Adherence. Intervals (on-condition or hardtime) and the related man-hour times are based on normal operation.
The man-hour time specified is the time needed to do all the services prescribed for a particular interval. On-
condition (OC) oil sample intervals will be applied unless changed by the Army Oil Analysis Program (AOAP)
laboratory. Change the hardtime interval if the lubricants are contaminated or if operating the equipment under
adverse operating conditions, including longer-than-usual operating hours. The calendar interval may be extended
during periods of low activity. If extended, adequate preservation precautions must be taken. Hardtime intervals
will be applied in the event AOAP laboratory support is not available. Hardtime intervals must be applied during
the warranty period.

Intervals shown in this lubrication order and services are based on mileage/calendar, and in some cases mileage
alone. An example of a mileage/calendar interval is: Q, which means every 3,000 miles (4,827 km) or quarterly (every
three months). The lubrication is to be performed at whichever interval occurs first for the vehicle. An example of a
mileage alone interval is: 6K, which stands for every 6,000 miles (9,654 km). The lubrication/services is to be performed
at the mileage indicated regardless of the calendar interval.

•
Dry Cleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves;
use only in well-ventilated area; avoid contact with skin, eyes, and clothes, and do not breath
vapors. Keep away from heat or flame. Never smoke when using solvent; the flashpoint for
Type I Dry Cleaning Solvent is 100°F (38 C) and for Type II is 138 F (50 C). Failure to comply
may result in serious injury or death to personnel.

• If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts eyes,
immediately flush eyes with water and get medical attention. Failure to comply may result in
injury to personnel.

b. Cleaning fittings before lubricating. Clean parts with dry cleaning solvent (SD P-D-680) (Item 71, Appendix D)
or equivalent. Dry before lubricating. Dashed arrows indicate lubrication on both sides of the equipment.

c. Lubricating after fording. If fording occurs, lubricate all fittings below fording depth and check submerged
gearboxes for presence of water.

d. Lubricating after high-pressure washing. After a thorough washing, lubricate all grease fittings and oil can
points outside and underneath vehicle.

e. Level of Maintenance. The lowest level of maintenance authorized to lubricate a point is Operator/Unit
Maintenance (O). Operator/crew (C) may lubricate points authorized for Unit Maintenance (O) when authorized by
Unit Maintenance (O).

f.
Localized views. A reference to the appropriate localized view is given after most lubrication entries. Localized
views begin on page H-9.

WARNING

TM 9-2320-365-20-1

H-2
Change 2

H-1. GENERAL (CONT)

g. Interval Symbols. The lubrication/service interval symbols will be used as applicable:

Q-quarterly/3,000 mi (4,827 km) (whichever occurs first)
S-semiannually/6,000 mi (9,654 km) (whichever occurs first)
A-annually/12,000 mi (19,308 km) (whichever occurs first)
B-biennially/24,000 mi (38,616 km) (whichever occurs first)
3K-every 3,000 mi (4,827 km) (no calendar interval)
6K-every 6,000 mi (9,654 km) (no calendar interval)
12K-every 12,000 mi (19,308 km) (no calendar interval)
24K-every 24,000 mi (38,616 km) (no calendar interval)

H-2. OIL FILTERS

Oil filters shall be serviced/changed as applicable, when:

a.
They are known to be contaminated, or clogged;

b.
Service is recommended by AOAP laboratory analysis; or

c.
At prescribed hardtime intervals while vehicle is
under warranty, or if AOAP is not available/used
as required.

H-3. AOAP SAMPLING INTERVAL

•
Engine oil is hot and under pressure. The oil sampling valve releases oil proportionally to
the amount of pressure applied to valve. Activate oil sampling valve by pressing in slowly to
prevent injury to personnel. Failure to comply may result in injury to personnel.

•
Wear safety goggles when taking oil sample. Oil is under pressure and could cause injury to
personnel. Failure to comply may result in injury to personnel.

Units participating in AOAP will sample engine oil every 3,000 miles (4,827 km) or 6 months, whichever occurs
first and change engine oil as directed by AOAP. Units participating in AOAP will sample transmission oil every
6,000 miles (9,654 km) or 12 months, whichever occurs first and change transmission oil as directed by AOAP.
Units participating in AOAP will sample hydraulic system oil initially after 6 weeks or 10 hours of operation,
whichever occurs first. After initial oil change samples should be taken every 12 months or 50 hours of
operation, whichever occurs first and change hydraulic oil as directed by AOAP.

H-4. WARRANTY HARDTIME STATEMENT

"For equipment under manufacturer's warranty, hardtime oil service intervals shall be followed. Intervals shall
be shortened if lubricants are known to be contaminated or if operation is under adverse conditions (such as
longer than usual operating hours, extended idling periods, extreme dust)."

WARNING

TM 9-2320-365-20-1

Change 2
H-3

SECTION II. LUBRICATION/SERVICE CHART

H-5. LUBRICATION/SERVICE KEY

LUBRICANTS

Specification
Type

MIL-L-2104
(OE/HDO)
Lubricating Oil, Internal Combustion Engine, Combat/Tactical
Service

MIL-L-46167
(OEA)
Lubricating Oil, Internal Combustion Engine, Arctic

MIL-L-2105
(GO)
Lubricating Oil, Gear, Multipurpose

MIL-G-10924
(GAA)
Grease, Automotive and Artillery

MIL-G-18458
(GW)
Grease, Wire-Rope and Exposed Gear

MIL-H-5606
(OHA)
Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and Ordnance

DESCRIPTION
CAPACITY
EXPECTED TEMPERATURES

Above +40 F
(Above +4 C)
+40 F to -15 F
(+4 C to -26 C)
-15 F to -50 F
(-26 C to -46 C)

Engine crankcase
25 qt
(24 L)
OE/HDO-15/40
OE/HDO-15/40
OEA

Transmission
(total system)
43.3 qt
(41 L)
OE/HDO-15/40
OE/HDO-10
OEA

Transmission (at oil change)
31.8 qt
(30.0 L)
OE/HDO-15/40
OE/HDO-10
OEA

Transmission (after overhaul)
39.0 qt
(37.0 L)
OE/HDO-15/40
OE/HDO-10
OEA

Steering system
5 qt
(4.8 L)
OE/HDO-10
OE/HDO-10
OEA

Hydraulic reservoir
27 gal
(102.2 L)
OE/HDO-10
OE/HDO-10
OEA

Front axle differential
(maximum capacity)
9.5 qt
(9.0 L)
GO-80/90
GO-80/90
SAE 75W90 OR
GO-75

Rear axle differential
(maximum capacity)
18.05 qt
(17.1 L)
GO-80/90
GO-80/90
SAE 75W90 OR
GO-75

Front axle planetary hubs
11-13 oz
(0.33-0.38 L)
GO-80/90
GO-80/90
SAE 75W90 OR
GO-75

11K Self-Recovery Winch (SRW)
As Required
GO-85/140
GO-80/90
GO-75

Propeller shaft universal and slip
joints
As Required
GAA
GAA
GAA

Tie rod ends
As Required
GAA
GAA
GAA

Towing pintle assembly
As Required
GAA
GAA
GAA

Spring bolts and spring shackles
As Required
GAA
GAA
GAA

Front axle shaft U-joints and
steering knuckles
As Required
GAA
GAA
GAA

TM 9-2320-365-20-1

H-4
Change 2

H-5. LUBRICATION/SERVICE KEY (CONT)

DESCRIPTION
CAPACITY
EXPECTED TEMPERATURES

Above +40 F
(Above +4 C)
+40 F to -15 F
(+4 C to -26 C)
-15 F to -50 F
(-26 C to -46 C)

Front axle inner wheel
bearing
As Required
GAA
GAA
GAA

Rear axle inner wheel
bearing
As Required
GAA
GAA
GAA

Front lifting beam
As Required
GAA
GAA
GAA

11K Self-Recovery Winch
(SRW) cable
As Required
GW
GW
GW

Air/hydraulic power unit
3 pt
(1.4 L)
OHA
OHA
OHA

Backup hydraulic pump
19 oz
(562 ml)
OHA
OHA
OHA

COOLANT

Specification
Type

A-A-52624A
Antifreeze, Multi-Engine Type

MIL-A-11755
Antifreeze, Arctic-Type

DESCRIPTION
CAPACITY
EXPECTED TEMPERATURES

Above +40 F
(Above +4 C)
+40 F to -15 F
(+4 C to -26 C)
-15 F to -50 F
(-26 C to -46 C)

Cooling system
(engine only)
14 qt
(13 L)
A-A-52624A
A-A-52624A
N/A

Cooling system
(total system)
43.8 qt
(41.5 L)
A-A-52624A
A-A-52624A
N/A

Cooling system, Arctic
(total system)
58.3 qt
(55.2 L)
N/A
N/A
MIL-A-11755

CLEANING AGENT

Specification
Type

P-D-680
Dry Cleaning Solvent, SD-II

O-C-1901
Cleaning Compound, Windshield

TM 9-2320-365-20-1

Change 2
H-5

DESCRIPTION
CAPACITY
EXPECTED TEMPERATURES

Above +15 F
(Above -9 C)
+15 F to -15 F
(-9 C to -26 C)
-15 F to -50 F
(-26 C to -46 C)

All metal parts as required
N/A
SD-II (all temperatures)

Windshield washer reservoir
7.5 qt
(7.1 L)
2/3 water to
1/3 O-C-1901
1/2 water to
1/2 O-C-1901
1/3 water to
2/3 O-C-1901

For arctic operation refer to FM 9-207.

H-6. LUBRICATION/SERVICE INTERVALS

Intervals
Total Man-Hours

Quarterly (Q)
Lubrication performed once every three months or 3,000 mi
(4,827 km).*
2.0

Semi-annually (S)
Lubrication performed once every six months or 6,000 mi (9,654
km).*
2.5

Annually (A)
Lubrication performed once every year or every 12,000 mi
(19,308 km).*
1.5

Biennially (B)
Lubrication performed once every two years or every 24,000 mi
(38,616 km).*
3.5

3K
Lubrication performed once every 3,000 mi (4,827 km).**
1.0

6K
Lubrication performed once every 6,000 mi (9,654 km).**
1.0

12K
Lubrication performed once every 12,000 mi (19,308 km).**
4.0

24K
Lubrication performed once every 24,000 mi (38,616 km).**
0.5

* Whichever occurs first.
** No calendar interval.

TM 9-2320-365-20-1

H-6
Change 2

H-7. LOCATOR VIEWS

LUBRICANT INTERVAL
INTERVAL LUBRICANT

CHASSIS

NOTE: Dashed arrows indicate lubrication on both sides of vehicle.

Engine
Crankcase
Breather (O)
(See note 17 and view A)

Fuel Filter (O)
(See note 6 and view A)

Fuel/Water Separator (O)
(See note 5 and view B)

Cooling System (O)
(See note 7)

Transmission Filter (O)
(See note 3 and view F)

Transmission
Drain and Fill (O)
(See note 3 and views D,
E, and F)

Towing Pintle
Fill (O)
(See note 16 and views J
and K)

Engine Oil Filter (O)
(See note 2 and view C)

Crankcase
Drain and Fill (O)
(See note 1 and views C
and D)

Front Axle Inner Wheel
Bearing
Repack (O)
(See note 22)

Power Steering Reservoir
Drain and Fill (O)
(See note 4 and view G)

Power Steering Filter (O)
(See note 4 and view G)

Spring Bolt
Fill (O)
(See note 18 and view H)

Spring Shackle
Fill (O)
(See note 18 and view AE)

LUBRICANT INTERVAL
INTERVAL LUBRICANT

Spring Bolt
Fill (O)
(See note 18 and view H)

Spring Shackle
Fill (O)
(See note 18 and view I)

Tie Rod Ends
Fill (O)
(See note 13 and view N)

Universal and Slip Joints
Fill (O)
(See note 9 and view P)

Battery Posts (O)
(See note 19 and view Q)

Air Dryer (O)
(See note 25 and view AF)

Universal and Slip Joints
Fill (O)
(See note 9 and view P)

11K Self-Recovery Winch
(SRW) Cable Front Roller
Fairlead
Fill (O)
(See note 23 and views Z
and AA)

Brake
Wedge
and
Air
Chamber (O)
(See note 21 and view L)

Backup
Hydraulic
Pump
Drain and Fill (O)
(See note 10 and view R)

Air/Hydraulic
Power
Unit
Drain and Fill (O)
(See note 10 and view S)

Brake
Wedge
and
Air
Chamber (O)
(See note 21 and view M)

11K Self-Recovery Winch
(SRW) Cable Rear Roller
Fairlead
Fill (O)
(See note 23 and views AB
and AC)

CHASSIS

NOTE: Dashed arrows indicate lubrication on both sides of vehicle.

H-7

TM 9-2320-365-20-1

TM 9-2320-365-20-1

H-8
Change 2

H-7. LOCATOR VIEWS (CONT)

LUBRICANT INTERVAL
INTERVAL LUBRICANT

CHASSIS

NOTE: Dashed arrows indicate lubrication on both sides of vehicle.

Front Axle
Check and Fill (O)
(See note 11 and view T)

Axle Shaft U-Joints
Fill (O)
(See note 20 and view U)

Steering Knuckles
Fill (O)
(See note 20 and view U)

Front Lifting Beam
Clean and Grease (O)
(See note 24 and view AD)

Hydraulic Reservoir and
Filter
Drain and Fill (O)
(See note 8 and view X)

Rear Axle Inner Wheel
Bearing Repack (O)
(See note 22)

Rear Axle
Check and Fill (O)
(See note 11 and view T)

Front Axle
Drain and Fill (O)
(See note 11 and view T)

Wheel
End
Planetary
Hubs
Drain and Fill (O)
(See note 12 and view V)

Wheel
End
Planetary
Hubs
Check and Fill (O)
(See note 12 and view V)

11K Self-Recovery Winch
(SRW) Cable
Fill (O)
(See note 14 and view W)

11K Self-Recovery Winch
(SRW)
Check and Fill (O)
(See note 15 and view Y)

11K Self-Recovery Winch
(SRW)
Drain and Fill (O)
(See note 15 and view Y)

Rear Axle
Drain and Fill (O)
(See note 11 and view T)

TM 9-2320-365-20-1

Change 2
H-9

TM 9-2320-365-20-1

H-10
Change 2

H-8. LOCAL VIEWS (CONT)

H-11

TM 9-2320-365-20-1

TM 9-2320-365-20-1

H-12
Change 2

H-8. LOCAL VIEWS (CONT)

H-13

TM 9-2320-365-20-1

H-8. LUBRICATION LOCAL VIEWS (CONT)

H-14

TM 9-2320-365-20-1

H-15

TM 9-2320-365-20-1

TM 9-2320-365-20-1

H-16 Change 2

H-8. LOCAL VIEWS (CONT)

TM 9-2320-365-20-1

Change 2 H-17

H-9. LUBRICATION/SERVICES NOTES

1.
ENGINE CRANKCASE. Check engine oil level daily. Change engine oil at initial 5,000 miles (8,045 km). During
the remainder of the 12,000 mile (19,308 km)/18 month warranty period, Units participating in AOAP will sample engine
oil every 3,000 miles (4,827 km) or 6 months, whichever occurs first and change engine oil as directed by AOAP. Units
not participating in AOAP, will change engine oil every 6,000 miles (9,654 km) or every six months, whichever occurs
first. After expiration of engine warranty period, Units participating in AOAP will perform engine oil change as directed by
AOAP. Units not participating in AOAP will change engine oil every 6,000 miles (9,654 km) or every six months,
whichever occurs first, or when operating in dusty areas or under severe operating conditions, change the oil every
3,000 miles (4,827 km) or every three months, whichever occurs first. Drain engine oil when engine is warm. Refill
engine crankcase with OE/HDO specified for the ambient temperature. Engine oil is full when level is within crosshatch
marks on the dipstick. Do not overfill.

2.
ENGINE OIL FILTER. Filter is replaced each time the crankcase is drained. If water or metal particles are detected
during oil filter replacement, notify Direct Support Maintenance personnel before refilling crankcase (para 3-4).

3.
TRANSMISSION. Check transmission oil level daily. Change transmission oil at initial 5,000 miles (8,045 km).
During the remainder of the 24 month/unlimited mileage warranty, Units participating in AOAP will sample transmission
oil every 6,000 miles (9,654 km) or 12 months, whichever occurs first and change transmission oil as directed by AOAP.
Units not participating in AOAP will perform transmission oil change every 24,000 miles (38,616 km) or once every two
years, whichever occurs first. Drain transmission oil when engine is warm. Refill with OE/HDO specified for ambient
temperature. Add oil until the proper level is reached (TM 9-2320-365-10). Do not overfill. Replace oil filters each time
transmission oil is changed (para 8-9).

4.
POWER STEERING. Check power steering oil level weekly. Change the oil every 24,000 miles (38,616 km).
Disconnect upper and lower hoses from steering gear and drain oil. Refill power steering pump reservoir with OE/HDO
specified for the ambient temperature. Reservoir is full when oil is between the two marks on the dipstick. Do not
overfill. Remove dipstick, wipe clean and install dipstick fully into reservoir. Remove dipstick and read oil level. Replace
oil filter each time power steering oil is changed (para 13-8).

5.
FUEL/WATER SEPARATOR. Replace filter element every 6,000 miles (9,654 km) or once every six months,
whichever occurs first (para 4-13).

6.
FUEL FILTER. The fuel particle filter is replaced when a new fuel/water separator filter element is installed. The
normal replacement interval is every 6,000 miles (9,654 km) or once every six months, whichever occurs first (para 4-
14).

7.
ENGINE COOLANT. Check engine coolant level daily. Change the coolant and flush the cooling system every
24,000 miles (38,616 km) or once every two years, whichever occurs first. Fill radiator overflow tank with an Ethylene
Glycol/water mixture as specified in 0-A-548D. Service the cooling system before the specified interval if:

•
Coolant is heavily contaminated.
•
Engine overheats.
•
Oil cooler has failed allowing oil and coolant to mix.

8.
HYDRAULIC RESERVOIR and FILTER. Check oil level weekly and make sure oil level gage reads F (full). Units
participating in AOAP will sample oil annually and change oil and filter as directed by AOAP. Units not participating in
AOAP will change oil and filter every two years. Drain oil and refill hydraulic reservoir with OE/HDO specified for
ambient operating temperature. Fill hydraulic reservoir until oil level gage reads F (full). Do not overfill. Replace oil filter
each time oil is changed (para 9-12).

TM 9-2320-365-20-1

H-18 Change 2

H-9. LUBRICATION/SERVICE NOTES (CONT)

9.
DRIVE SHAFT UNIVERSAL and SLIP YOKE.
Lubricate drive shafts with GAA every 3,000 miles (4,827 km) or once every three months, whichever occurs first, using
a low pressure lubrication gun. If operating conditions are severe or abnormal, service at 1,000 miles (1,609 km) or once
every month, whichever occurs first. Perform drive shaft hinging inspection every time drive shafts are serviced (para 9-
3).

•
UNIVERSAL JOINT:
A. Apply grease to both grease fittings until new grease purges from all four bearing caps.
B. If grease does not purge from all four bearing caps, perform the following steps:
(1) Loosen two screws on bearing cap that does not purge, approximately 1/4 in.
(2) Apply grease to grease fitting for bearing cap that does not purge until bearing cap purges.
(3) Remove and discard the two screws loosened in step (1).
(4) Position two replacement screws in bearing cap and tighten down evenly.
(5) Tighten two screws to 26-35 lb-ft (35-47 N•m).

•
SLIP JOINT:
A. Apply grease until grease appears at the vent in the welch plug.
B. Place your finger over the welch plug vent and add grease until grease purges from the dust seal.
C. If grease does not purge from the dust seal, inspect drive shaft slip yoke (para 9-2).

10. AIR/HYDRAULIC POWER UNIT and BACKUP HYDRAULIC PUMP. Change OHA oil every 24,000 miles (38,616
km) or once every two years, whichever occurs first. To service air/hydraulic power unit and backup hydraulic pump
refer to vehicle para 19-7, Air Transportability Hydraulic System Service.

11. ALL AXLE DIFFERENTIALS. Check oil level in differentials every 3,000 miles (4,827 km). Check oil level with
vehicle parked on level surface and axle differential at ambient temperature, allowing at least one hour to cool down after
vehicle operation. If oil is checked when axle differential is hot, it is normal for oil to spill out of the port due to expansion
from the heat. Oil level is considered full if it is within one inch of the bottom of the fill port. If oil spills from the fill port
when the axle differential is cool, it is overfull. Allow oil to drain until no more drains out. If the oil level is more than one
inch below the bottom of the fill port, refill axle differential with GO specified for the ambient temperature until level with
bottom of fill port. Change the oil every 24,000 miles (38,616 km) or once every two years, whichever occurs first. Drain
oil when hot after operation.

12. FRONT AXLE WHEEL END PLANETARY HUBS. There are two lube intervals for the front axle wheel end
planetary hubs.

a.
Check and fill front axle wheel end planetary hubs every 3,000 miles (4,827 km) or once every three months,
whichever occurs first, as follows:

(1)Position vehicle on a level surface. Allow 15 minutes for vehicle to cool before checking oil levels.
(2)Position fill port at 4 o'clock position. If oil flows from fill port when plug is loosened, let oil drain to correct level.
If oil level is below fill port, fill hub with GO specified for the ambient temperature until oil is level with fill port.

b.
Drain and fill front axle wheel end planetary hubs every 24,000 miles (38,616 km) or once every two years,
whichever occurs first, following the repacking of the inner wheel bearings or whenever wheel end assemblies
are taken apart for other maintenance as follows:

(1)Position vehicle on a level surface.
(2)Position fill port at the 6 o'clock (down) position.
(3)Drain hub oil (allow a minimum of 15 minutes for oil to drain down from vent tubes).
(4)Refill hubs with 11-13 ounces of GO specified for the ambient temperature.

TM 9-2320-365-20-1

13. TIE ROD ENDS.
Lubricate tie rod ends with GAA every 6,000 miles (9,654 km) or once every six months,
whichever occurs first, using a low pressure lubrication gun, until new grease is seen purging from the boot area. If
operating conditions are severe or abnormal, service at 1,000 miles (1,609 km) or once every month, whichever occurs
first.

14. 11K SELF-RECOVERY WINCH (SRW) CABLE:

CAUTION

Do not use dry cleaning solvent to clean 11K Self-Recovery Winch (SRW) cables. Use of dry cleaning
solvent will remove lubricant from inner strands of 11K SRW cables. Failure to comply may result in
damage to equipment.

a.
After winch operation:

Refer to FM 5-125.

b. Care of wire rope:

Refer to FM 5-125.

c. Inspection of wire rope:

Refer to FM 5-125.

d. Every six months:

(1)
Unwind entire length of 11K SRW cable (TM 9-2320-365-10).
(2)
Soak and clean 11K SRW cable with new OE/HDO 30.
(3)
Wipe off excess OE/HDO 30.
(4)
Coat 11K SRW cable with GW.
(5)
Rewind 11K SRW cable (TM 9-2320-365-10).

15. 11K SRW. Check 11K SRW gear oil level every 6,000 miles (9,654 km) or once every six months, whichever
occurs first. Refill 11K SRW with GO specified for ambient temperature. Change oil every 12,000 miles (19,308 km)
or once every year, whichever occurs first. Use procedure (a) to check and fill oil level; use procedure (b) to change
oil.

a. Check and fill oil level as follows:

(1) Shift the freespool mechanism to the disengage position so the drum can be freely rotated.
(2) Rotate the drum to where either plug is near the top of the 11K SRW. Remove the plug.
(3) Rotate the drum 90 degrees in the direction that allows the other plug to be near the top of the 11K SRW.
Remove the plug.

NOTE

Oil level is full if a small amount of oil runs out of lower plug.

(4) Add oil until a small amount of oil runs out of lower plug hole.
(5) Apply adhesive (Item 2, Appendix D) to plug and position plug in top hole.
(6) Rotate drum until open hole is at top.
(7) Apply adhesive (Item 2, Appendix D) to plug and position plug in top hole.
(8) Tighten plugs to 13-15 lb-ft (18-20 N·m).

Change 1
H-19

TM 9-2320-365-20-1

H-20 Change 2

H-9. LUBRICATION/SERVICE NOTES (CONT)

b.
Change oil as follows:

(1)
Shift the freespool mechanism to the disengage position so the drum can be freely rotated.
(2)
Rotate the drum to where either plug is near the top of the 11K SRW. Remove the plug.
(3)
Rotate the drum 90 degrees in the direction that allows the other plug to be near the top of the 11K SRW.
Remove the plug.
(4)
Position drain pan (Item 17, Appendix C) under 11K SRW.
(5)
Rotate the drum until either hole is straight down to the bottom of the 11K SRW. Allow the oil to drain
completely.
(6)
Rotate the drum until either hole is at top.

NOTE

Oil level is full if a small amount of oil runs out of lower plug.

(7)
Add oil until a small amount of oil runs out of lower plug hole.
(8)
Apply adhesive (Item 2, Appendix D) to plug and position plug in top hole.
(9)
Rotate drum until open hole is at top.
(10)
Apply adhesive (Item 2, Appendix D) to plug and position plug in top hole.
(11)
Tighten plugs to 13-15 lb-ft (18-20 N•m).

16. TOWING PINTLE. Lubricate towing pintle with GAA every 6,000 miles (9,654 km) or once every six months,
whichever occurs first, using a low pressure lubrication gun until new grease is seen purging.

•
Dry Cleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves; use
only in well-ventilated area; avoid contact with skin, eyes, and clothes, and do not breath vapors.
Keep away from heat or flame. Never smoke when using solvent; the flashpoint for Type I Dry
Cleaning Solvent is 100 F (38 C) and for Type II is 138 F (50 C). Failure to comply may result in
serious injury or death to personnel.

•
If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical help.
If solvent contacts skin or clothes, flush with cold water. If solvent contacts eyes, immediately flush
eyes with water and get medical attention. Failure to comply may result in injury to personnel.

17. ENGINE CRANKCASE BREATHER. Remove crankcase breather and clean with Dry Cleaning Solvent (SD P-D-
680) (Item 71, Appendix D) or equivalent, and replace o-ring seal every 6,000 miles (9,654 km) or once every six
months, whichever occurs first (para 3-5).

18. FRONT and REAR AXLE SPRING BOLT and SPRING SHACKLE. Lubricate front and rear axle spring bolts and
spring shackles with GAA every 3,000 miles (4,827 km) or once every three months, whichever occurs first, using a low
pressure lubrication gun until grease appears between pins and bushings at both ends of spring bolt and spring shackle.
If pins do not accept grease, notify Direct Support to remove pins. Clean and inspect pins and bushings, replace if
necessary. If operating conditions are severe or abnormal, service at 1,000 miles (1,609 km) or once every month,
whichever occurs first.

19. BATTERY POSTS. Service batteries in accordance with TM 9-6140-200-14, every 6,000 miles (9,654 km) or once
every six months, whichever occurs first.

WARNING

TM 9-2320-365-20-1

Change 2 H-21/(H-22 Blank)

20. FRONT AXLE SHAFT UNIVERSAL JOINTS and STEERING KNUCKLES. Lubricate universal joints every 3,000
miles (4,827 km) or once every three months, whichever occurs first. Lubricate steering knuckles with GAA every 6,000
miles (9,654 km) or once every six months, whichever occurs first, using a low pressure lubrication gun. If operating
conditions are severe or abnormal, service at 1,000 miles (1,609 km) or once every month, whichever occurs first.

21. BRAKE WEDGE and AIR CHAMBER: BRAKE SPIDER, SELF-ADJUSTER MECHANISM, AND WEDGE
ASSEMBLY. Clean and lubricate (with GAA) areas of spider and hardware that contact the brake shoes. Disassemble,
clean and lubricate the self-adjuster mechanism. Clean and lubricate the wedge head, rollers and ramps in the plungers.
Clean and lubricate every 6,000 miles (9,654 km). If operating conditions are severe or abnormal, service at 3,000 miles
(4,827 km) or once every three months, whichever occurs first, or when any of the following occur: Refer to para 11-4
and 11-5.

• Seals are replaced
• Plungers are removed
• Brakes are relined
• Grease becomes contaminated or hardened

22. FRONT and REAR AXLE INNER WHEEL BEARINGS. Repack inner wheel bearings with GAA every 12,000 miles
(19,308 km), when semiannual PMCS inspection of service brakes reveals oil leak from inner hub, or whenever
wheel end assemblies are taken apart for other maintenance (para 10-2).

23. 11K SRW CABLE ROLLER FAIRLEADS. Lubricate with GAA every 6,000 miles (9,654 km) or once every six
months, whichever occurs first, using a low pressure lubrication gun. If operating conditions are severe or abnormal,
service at 1,000 miles (1,609 km) or once every month, whichever occurs first.

• Dry Cleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and
gloves; use only in well-ventilated area; avoid contact with skin, eyes, and clothes, and do
not breath vapors. Keep away from heat or flame. Never smoke when using solvent; the
flashpoint for Type I Dry Cleaning Solvent is 100 F (38 C) and for Type II is 138 F (50 C).
Failure to comply may result in serious injury or death to personnel.

• If personnel become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts
eyes, immediately flush eyes with water and get medical attention. Failure to comply may
result in injury to personnel.

24. FRONT LIFTING BEAM. Remove left and right lifting beams and clean with Dry Cleaning Solvent (SD P-D-680)
(Item 71, Appendix D) or equivalent, every 6,000 miles (9,654 km) or once every six months, whichever occurs first.
Apply a light coat of GAA to lifting beams. If operating conditions are severe or abnormal, service at 1,000 miles (1,609
km) or once every month, whichever occurs first.

25. AIR DRYER. Service air dryer (para 23-6) every 12,000 miles (19,308 km) or annually, whichever occurs first.

26. FRONT AND REAR LEAF SPRING. At initial 1000 miles (1609 km) of vehicle operation, tighten U-bolts to 390-510
lb-ft (529-692 N•m).

WARNING

APPENDIX J
ADDITIONAL AUTHORIZATION LIST (AAL)

Section I. INTRODUCTION

J-1. SCOPE

This appendix lists additional items you are authorized for the support of the LMTV.

J-2. GENERAL

This list identifies items that do not have to accompany the LMTV and that do not have to be turned in with it. These
items are all authorized to you by Common Tables of Allowance (CTA), Modification Table of Organization and
Equipment (MTOE), Tables of Distribution and Allowances (TDA), or Joint Table of Allowance (JTA).

J-3. EXPLANATION OF LISTING

National Stock Numbers, description, and quantities are provided to help you identify and request the additional items
you require to support this equipment.

Section II. ADDITIONAL AUTHORIZATION LIST

(1)
National Stock
Number

(2)
Description
(CAGE) Part Number

(3)

U/M

(4)
Qty
Auth

6685-01-193-1733
10,000 PSI Transducer:
(19207) 12258956

EA
1

J-1/(J-2 Blank)

TM 9-2320-365-20-1

TM 9-2320-365-20-1

Change 1 K-1

APPENDIX K
TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART

Section I. INTRODUCTION

K-1. INTRODUCTION

This appendix lists the various transmission controls and configuration modifications that may be required to permit
the transmission to function correctly. This appendix will guide the mechanic through the hardware selection process
by identifying compatibility issues between the transmission controls (WTEC II/WTEC III) and the numerous revisions
of the Allison MD3070PT transmission (PRE-ID w/ 24-pin connector, PRE-ID w/ 31-pin connector, TID 1, TID 2, and
TID 3). Refer to Figure 1. After replacing any component of the transmission controls or the transmission assembly,
perform calibration procedures in TM 9-2320-365-20-3 paragraph 8-2 or 8-3.

K-2. EXPLANATION OF COLUMNS

a. Column (1) - Installed Controls or Controls Being Installed. This column lists all of the variables concerning
which version of transmission controls are installed in the vehicle, or may need to be installed, to communicate
correctly with the transmission.

b. Column (2) - Installed Transmission or Transmission Being Installed. This column lists all of the various
revisions of the Allison MD3070PT transmissions that may be installed in the vehicle.

c. Column (3) - Required Modification. This column lists the various electrical interface (hardware) modifications
that may be required to allow the transmission controls to communicate with the transmission.

K-3. HOW TO USE THIS CHART

a. Determine which controls and transmission are installed in the vehicle.

b. Determine which component requires replacement.

c. Read across the row to column (3) to determine the required modification.

Section II.

TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART

(1)
Installed Controls or
Controls Being Installed

(2)
Installed Transmission or
Transmission Being Installed

(3)
Required Modification
(Refer to Section III)

WTEC II
(with 24-pin connector)
PRE-ID w/ 24-pin connector
(transmission serial number prior to
6510032369)

No modification required.

WTEC II
(with 24-pin connector)
PRE-ID w/ 31-pin connector
(transmission serial number
6510032369 to 6510090785)

Install 31-pin connector.

WTEC II
(with 24-pin connector)
TID 1
(transmission serial number
6510090786 to 6510142171)

Install 31-pin connector.

WTEC II
(with 24-pin connector)
TID 2
(transmission serial number
6510142172 to 6510262116)

Install 31-pin connector and replace
transmission internal wiring harness.

TM 9-2320-365-20-1

K-2 Change 2

TRANSMISSION/TRANSMISSION CONTROLS ADAPTABILITY CHART (CONT)

(1)
Installed Controls or
Controls Being Installed

(2)
Installed Transmission or
Transmission Being Installed

(3)
Required Modification
(Refer to Section III)

WTEC II
(with 24-pin connector)
TID 3
(transmission serial number
6510262117 and subsequent)

Install 31-pin connector, replace
transmission internal wiring harness,
and reprogram WTEC II TEPSS. 1

WTEC II
(with 31-pin connector)
PRE-ID w/ 24-pin connector
(transmission serial number prior to
6510032369)

Install adapter cable assembly.

WTEC II
(with 31-pin connector)
PRE-ID w/ 31-pin connector
(transmission serial number
6510032369 to 6510090785)

No modification required.

WTEC II
(with 31-pin connector)
TID 1
(transmission serial number
6510090786 to 6510142171)

No modification required.

WTEC II
(with 31-pin connector)
TID 2
(transmission serial number
6510142172 to 6510262116)

Replace transmission internal wiring
harness.

WTEC II
(with 31-pin connector)
TID 3
(transmission serial number
6510262117 and subsequent)

Replace transmission internal wiring
harness and reprogram WTEC II
TEPSS. 1

WTEC III
(with ECU manufactured prior to
October 1999) 2

PRE-ID w/ 24-pin connector
(transmission serial number prior to
6510032369)

Install adapter cable assembly and ID
harness.

WTEC III
(with ECU manufactured prior to
October 1999) 2

PRE-ID w/ 31-pin connector
(transmission serial number
6510032369 to 6510090785)

Install ID harness.

WTEC III
(with ECU manufactured prior to
October 1999) 2

TID 1
(transmission serial number
6510090786 to 6510142171)

No modification required.

WTEC III
(with ECU manufactured prior to
October 1999) 2

TID 2
(transmission serial number
6510142172 to 6510262116)

No modification required.

WTEC III
(with ECU manufactured prior to
October 1999) 2

TID 3
(transmission serial number
6510262117 and subsequent)

Reprogram WTEC III ECU 1 or install
new WTEC III ECU (P/N 12421787-
002).

WTEC III
(with ECU manufactured after
October 1999) 3

PRE-ID w/ 24-pin connector
(transmission serial number prior to
6510032369)

Install adapter cable assembly and ID
harness.

WTEC III
(with ECU manufactured after
October 1999) 3

PRE-ID w/ 31-pin connector
(transmission serial number
6510032369 to 6510090785)

Install ID harness.

WTEC III
(with ECU manufactured after
October 1999) 3

TID 1
(transmission serial number
6510090786 to 6510142171)

No modification required.

1 Reprogramming can only be accomplished by an authorized Allison Transmission distributor. You must provide the
transmission serial number of the transmission being installed to ensure correct reprogramming. If at a later time, an
earlier version transmission is installed in a WTEC II equipped vehicle, WTEC II TEPSS will require reprogramming
again.
2 Vehicle serial number 012477 and lower. Refer to Figure 1.
3 Vehicle serial number 012478 and higher. Refer to Figure 1.

TM 9-2320-365-20-1

Change 2 K-3

(1)
Installed Controls or
Controls Being Installed

(2)
Installed Transmission or
Transmission Being Installed

(3)
Required Modification
(Refer to Section III)

WTEC III
(with ECU manufactured after
October 1999) 3

TID 2
(transmission serial number
6510142172 to 6510262116)

No modification required.

WTEC III
(with ECU manufactured after
October 1999) 3

TID 3
(transmission serial number
6510262117 and subsequent)

No modification required.

Section III.

MODIFICATION PARTS IDENTIFICATION

Identification
Part Number/NSN
Description

31-pin connector
300130
5935-21-921-1813
Converts a transmission external wiring harness from a
24-pin ("D" type) connector to a 31-pin (round type)
connector.

Transmission internal wiring
harness
29529474
6150-01-481-8088
Converts a TID 2 transmission to a TID 1 configuration to
allow WTEC II controls to communicate with the
transmission.

Gasket
29503283
5330-01-360-9035
Required when replacing transmission internal wiring
harness.

ID harness
200100
6150-21-921-1191
Allows WTEC III controls to communicate with a PRE-ID
transmission.

Adapter cable assembly
29519210
6150-01-420-5987
Adapts a PRE-ID transmission with 24-pin ("D" type)
connector to a transmission external wiring harness with a
31-pin (round) connector.

TM 9-2320-365-20-1

K-4 Change 1

MODIFICATION PARTS IDENTIFICATION (CONT)

TM 9-2320-365-20-1

SUBJECT INDEX

Subject
Para

A

Absorber
Rear Axle Shock Absorber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 15-4
Accessory
Introduction, Body, Chassis, and
Accessory Items Maintenance
. . . . . . . . . . 18-1
M1079 Van Body Interior Accessory
Mounting Locations . . . . . . . . . . . . . . . . . 16-44
Accelerator Pedal Replacement . . . . . . . . . . . . 4-21
Air
Brake Air Hoses Replacement
. . . . . . . . . . 11-19
Brake Protecting Valve Replacement
. . . . . 11-16
Brake System Loses Air When Brakes
Are Applied . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Cab Leveling Air Springs Will Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Charge Air Cooler to Air Inlet Elbow
Tubes and Hoses Replacement . . . . . . . . . . 4-5
Compressor Governor Adjustment
. . . . . . . 11-29
Compressor Inlet and Outlet Coolant
Tubes Replacement . . . . . . . . . . . . . . . . . . 6-11
Dryer Does Not Operate . . . . . . . . . . . . . . . . 2-16
Dryer Purges Constantly
. . . . . . . . . . . . . . . 2-21
Dryer Replacement/Repair . . . . . . . . . . . . . 21-14
Engine Air Intake System . . . . . . . . . . . . . . . 1-11
Filter Restriction Gauge
Replacement . . . . . . . . . . . . . . . . . . . . . . . 24-2
Front Brake Air Chamber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-7
Front Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI
. . . . . . . . . . . . . . . . . . . . . 2-16
FRONT BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front Brake Air Pressure Gage
Does Not Operate or Is Inaccurate . . . . . . . 2-16
/Hydraulic Power Unit and Bracket
Replacement/Repair
. . . . . . . . . . . . . . . . . 19-3
Intake Air Cleaner Filter Element, Air
Cleaner Assembly, and Particle
Extraction Tube Replacement . . . . . . . . . . . . 4-2
Introduction, Air System
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 23-1
Large Quantity of Moisture Expelled
From Air Reservoirs . . . . . . . . . . . . . . . . . . 2-21
M1079 Air Conditioner Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Subject
Para

A (Cont)

Air (Cont)
M1079 Air Conditioner ECU
Connector Replacement . . . . . . . . . . . . . . 16-47
M1079 Air Conditioner Kit Installation/
Removal . . . . . . . . . . . . . . . . . . . . . . . . . 20-81
M1079 Air Conditioner Power Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-82
M1079 Air Filter Replacement . . . . . . . . . . . 16-33
M1079 Heater and Air Conditioner
Cover Replacement . . . . . . . . . . . . . . . . . 16-31
M1079 Van Preparation For Air
Transport
. . . . . . . . . . . . . . . . . . . . . . . . 16-73
No Air Pressure Present At Rear
Gladhands
. . . . . . . . . . . . . . . . . . . . . . . . 2-21
Noisy Air Compressor Operation . . . . . . . . . . 2-21
Pressure Transmitter Replacement . . . . . . . . 7-36
Primary and Central Tire Inflation System
(CTIS) Air Hoses Replacement . . . . . . . . . . 23-2
Radiator/Charge Air Cooler
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 6-2
REAR BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
REAR BRAKE AIR Pressure Gage Does
Not Operate or Is Inaccurate
. . . . . . . . . . . 2-16
Rear Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI
. . . . . . . . . . . . . . . . . . . . . 2-16
Rear Brake Air Chamber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-8
Secondary and Primary Air Tanks
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-20
Spring and Bracket Replacement . . . . . . . . . 16-9
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
System Loses Pressure During Operation/
Slow, No, or Incorrect Air Pressure
Buildup . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
System Park and Trailer Air Supply
Valves Replacement
. . . . . . . . . . . . . . . . 11-18
System Pressure Builds Up to More
Than 120 psi (827 kPa) (Compressor
Fails to Unload) . . . . . . . . . . . . . . . . . . . . . 2-21
System Troubleshooting . . . . . . . . . . . . . . . . 2-21
Transport Troubleshooting . . . . . . . . . . . . . . 2-30
Transportability Air Hoses
Replacement . . . . . . . . . . . . . . . . . . . . . . . 23-3

Change 1
INDEX-1

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

A (Cont)

Air (Cont)
Transportability Hydraulic Hose
Replacement . . . . . . . . . . . . . . . . . . . . . . 19-11
Transportability Hydraulic System . . . . . . . . . 1-18
Transportability Hydraulic System
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-7
Alarm
Audible Alarm Does Not Operate
. . . . . . . . . 2-16
Audible Alarm Replacement . . . . . . . . . . . . . 7-35
Chemical Alarm Does Not Operate . . . . . . . . 2-16
Chemical Alarm Kit Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-52
M1079 Van Door Open Light Does
Not Illuminate and Audible Alarm
Does Not Operate . . . . . . . . . . . . . . . . . . . 2-16
Troop Transport Alarm Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-79
Troop Transport Alarm Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Troop Transport Audible Alarm Does
Not Operate
. . . . . . . . . . . . . . . . . . . . . . . 2-16
Troop Transport Alarm Switch,
Connector, and Bracket Replacement . . . . 20-80
All Marker Lights Do Not Illuminate In
Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Alternator
Belts Replacement . . . . . . . . . . . . . . . . . . . . . 7-3
Brackets Replacement . . . . . . . . . . . . . . . . . . 7-4
Ground Strap Replacement
. . . . . . . . . . . . . 7-64
100 Amp Alternator Replacement . . . . . . . . . . 7-2
100 Amp Alternator to Reverse
Polarity Relay 12 VDC Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-65
100 Amp Alternator to Reverse
Polarity Relay 24 VDC Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-66
24 VDC Circuits Do Not Operate
. . . . . . . . . 2-16
200 Amp Alternator Kit Installation
. . . . . . . 20-54
200 Amp Alternator Kit Removal . . . . . . . . . 20-55
200 Amp Alternator to Terminal
Block 12 VDC Cable Replacement . . . . . . 20-59
200 Amp Alternator to Terminal
Block 24 VDC Cable Replacement . . . . . . 20-61
200 Amp Alternator Replacement . . . . . . . . 20-56
Amber Warning Light Switch Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . . 2-16

A (Cont)

Amp
100 Amp Alternator Replacement . . . . . . . . . . 7-2
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 12 VDC
Cable Replacement . . . . . . . . . . . . . . . . . . 7-80
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 24 VDC
Cable Replacement . . . . . . . . . . . . . . . . . . 7-81
100 Amp Reverse Polarity Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-27
100 Amp Voltage Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 7-5
24 VDC Circuits Do Not Operate
. . . . . . . . . 2-16
12 VDC and/or 24 VDC Circuits
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
200 Amp Alternator Kit Installation
. . . . . . . 20-54
200 Amp Alternator Kit Removal . . . . . . . . . 20-55
200 Amp Alternator Replacement . . . . . . . . 20-56
200 Amp Alternator to Terminal Block
12 VDC Cable Replacement . . . . . . . . . . . 20-59
200 Amp Alternator to Terminal Block
24 VDC Cable Replacement . . . . . . . . . . . 20-61
200 Amp Reverse Polarity Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-58
200 Amp Terminal Block Replacement . . . . 20-69
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC
Cable Replacement . . . . . . . . . . . . . . . . . 20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC
Cable Replacement . . . . . . . . . . . . . . . . . 20-68
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-60
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-62
200 Amp Voltage Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-57
Anchor
Latch and Cab Anchor Brackets
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-74
Anti-Compounding Relay Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-11
Armament
Introduction, Armament/Sighting and
Fire Control Materiel Maintenance . . . . . . . . 21-1

INDEX-2
Change 1

TM 9-2320-365-20-1

Subject
Para
Subject
Para

A (Cont)

Assembly
General Assembly Instructions . . . . . . . . . . . 2-41
Audible
Alarm Does Not Operate
. . . . . . . . . . . . . . . 2-16
Alarm Replacement . . . . . . . . . . . . . . . . . . . 7-35
Troop Transport Audible Alarm Does
Not Operate
. . . . . . . . . . . . . . . . . . . . . . . 2-16
Auxiliary
M1079 W/O Winch Auxiliary Panel
Cable Assembly Replacement
. . . . . . . . . . 7-50
Panel Cable Assembly Replacement
(All Models Except M1079 W/O
Winch) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49
Panel Does Not Illuminate
. . . . . . . . . . . . . . 2-16
Panel, Instrument Panel, and Personnel
Heater Do Not Illuminate . . . . . . . . . . . . . . 2-16
Panel Replacement . . . . . . . . . . . . . . . . . . . . 7-8
Panel Switch Does Not Illuminate . . . . . . . . . 2-16
Starter Solenoid Replacement
. . . . . . . . . . . . 7-6
Axle
Differential(s) Noisy . . . . . . . . . . . . . . . . . . . 2-25
Introduction, Front and Rear Axle
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 10-1
Front Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-8
Rear Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-9
Rear Axle Shaft Replacement . . . . . . . . . . . . 10-4
Rear Axle Shock Absorber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 15-4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 2-25

B

Backup
Light Assembly Replacement/Repair . . . . . . . 7-29
Light Does Not Illuminate . . . . . . . . . . . . . . . 2-16
Back-Up
Hydraulic Pump Replacement . . . . . . . . . . . . 19-2
Batteries
Disconnecting/Connecting Batteries
. . . . . . . 7-48
Battery
Box Replacement
. . . . . . . . . . . . . . . . . . . . 7-47
/Battery Cables Replacement . . . . . . . . . . . . 7-46
Tester Does Not Operate . . . . . . . . . . . . . . . 2-16
Tester Replacement . . . . . . . . . . . . . . . . . . . 7-45
to Shunt Cable Assembly Replacement . . . . . 7-69
to Starter Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-70

B (Cont)

Battery (Cont)
to 100 Amp Reverse Polarity Relay
12 VDC Cable Replacement . . . . . . . . . . . . 7-67
to 100 Amp Reverse Polarity Relay
24 VDC Cable Replacement . . . . . . . . . . . . 7-68
to 200 Amp Terminal Block 12 VDC
Cable Assembly Replacement
. . . . . . . . . 20-63
to 200 Amp Terminal Block 24 VDC
Cable Assembly Replacement
. . . . . . . . . 20-64
Beams
One or Both Headlights (High and
Low Beams) Do Not Illuminate . . . . . . . . . . 2-16
One or Both Headlight High Beams
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
One or Both Headlight Low Beams
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
Turn Signal Indicators and High
Beams on Indicator Do Not Operate . . . . . . 2-16
Belt
Drive Belt and Tension Pulley
Replacement . . . . . . . . . . . . . . . . . . . . . . . 6-13
Seat Belt Replacement . . . . . . . . . . . . . . . . 16-15
Belts
Alternator Belts Replacement . . . . . . . . . . . . . 7-3
Binding
M1079 Field Telephone Binding Post/
Box and Conduit Replacement . . . . . . . . . 16-51
M1079 24 VDC Binding Post/Box and
Conduit Replacement . . . . . . . . . . . . . . . . 16-52
Blackout
Drive Light Does Not Illuminate . . . . . . . . . . . 2-16
Drive Light Replacement/Repair . . . . . . . . . . 7-30
Marker Lights Do Not Illuminate . . . . . . . . . . 2-16
M1079 Blackout Light(s) Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Blackout Override Switch
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-56
M1079 Blackout Shield and Frame
Replacement/Repair
. . . . . . . . . . . . . . . . 16-37
M1079 Blackout Switch Replacement . . . . . 16-57
M1079 Blackout/Emergency Light
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-58
M1079 Fluorescent Lights Do Not
Operate In Blackout Override Mode
. . . . . . 2-16
M1079 110 VAC Outlet J232 and
J233 Do Not Operate In Blackout
Override Mode
. . . . . . . . . . . . . . . . . . . . . 2-16
One or Both Blackout Stoplights
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
Boarding Handles Replacement . . . . . . . . . . . 16-76

Change 1
INDEX-3

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

B (Cont)

Body
All M1079 Van Body Marker Lights
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
Introduction, Body and Cab
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 16-1
Introduction, Body, Chassis, and
Accessory Items Maintenance
. . . . . . . . . . 18-1
M1079 Van Body Floor Tapping Plate
Initial Installation (Serial Numbers 001
through 190) . . . . . . . . . . . . . . . . . . . . . . 16-43
M1079 Van Body Interior Mounting
Locations
. . . . . . . . . . . . . . . . . . . . . . . . 16-44
M1079 Van Body Clearance Marker Light
Does Not Illuminate . . . . . . . . . . . . . . . . . . 2-16
M1079 Van Body Replacement . . . . . . . . . . 16-19
Boom
Light Material Handling Crane (LMHC)
Boom Replacement . . . . . . . . . . . . . . . . . 20-74
Light Material Handling Crane (LMHC)
Boom Sheave Replacement . . . . . . . . . . . 20-75
Brackets
Alternator Brackets Replacement
. . . . . . . . . . 7-4
Brake
Air Brake Protecting Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-16
Air Hoses Replacement . . . . . . . . . . . . . . . 11-19
Foot Control Valve and Brake Foot
Pedal Replacement . . . . . . . . . . . . . . . . . . 11-9
Front Brake Air Chamber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-7
FRONT BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI
. . . . . . . . . . . . . . . . . . . . . 2-16
FRONT BRAKE AIR Pressure Gage Does
Not Operate or Is Inaccurate
. . . . . . . . . . . 2-16
Front Brake Plunger Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 11-4
Front Brake Shoes Replacement/
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 11-2
Introduction, Brake System
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 11-1
Parking Brake Indicator and/or
Emergency Brake Indicator Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Parking Brake Does Not Release . . . . . . . . . 2-20
REAR BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16

B (Cont)

Brake (Cont)
REAR BRAKE AIR Pressure Gage Does
Not Operate or Is Inaccurate
. . . . . . . . . . . 2-16
Rear Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI
. . . . . . . . . . . . . . . . . . . . . 2-16
Rear Brake Air Chamber
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-8
Rear Brake Plunger Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 11-5
Rear Brake Shoes Replacement/
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 11-3
Rear Spring Brake Caging . . . . . . . . . . . . . . 11-6
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
System Loses Air When Brakes
Are Applied . . . . . . . . . . . . . . . . . . . . . . . . 2-20
System Troubleshooting . . . . . . . . . . . . . . . . 2-20
Braking
Excessive Braking Distance . . . . . . . . . . . . . 2-20
Brakes
Brake System Loses Air When Brakes
Are Applied . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Front Brakes Do Not Apply . . . . . . . . . . . . . . 2-20
Front Brakes Overheat and/or
Do Not Release . . . . . . . . . . . . . . . . . . . . . 2-20
Parking Brakes Does Not Apply . . . . . . . . . . 2-20
Rear Brakes Do Not Apply . . . . . . . . . . . . . . 2-20
Rear Brakes Overheat . . . . . . . . . . . . . . . . . 2-20
Vehicle Brakes Unevenly, Brakes Pull
to One Side or Grab
. . . . . . . . . . . . . . . . . 2-20
Breather
Crankcase Breather Replacement . . . . . . . . . . 3-5
Bumper
Front Bumper Replacement . . . . . . . . . . . . . 14-2
M1079 Rubber Bumper and Tee Latch
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-29

C

Cab
Clearance Marker Lights Cable
Assembly Replacement . . . . . . . . . . . . . . . 7-59
Does Not Raise . . . . . . . . . . . . . . . . . . . . . . 2-32
Does Not Lower . . . . . . . . . . . . . . . . . . . . . . 2-32
Emergency Cab Lift Procedure . . . . . . . . . . . 19-8
Exhaust Fumes in Cab . . . . . . . . . . . . . . . . . 2-14

INDEX-4
Change 1

TM 9-2320-365-20-1

Change 2
INDEX-5

Subject
Para

C (Cont)

Cab (Cont)
Floor Covering Replacement.............................16-12
Hydraulic Cylinder Replacement .......................19-10
Hydraulic Latch Replacement/
Adjustment.................................................... 19-6
Introduction, Body and Cab
Maintenance.................................................. 16-1
Latch and Cab Anchor Brackets
Replacement ................................................16-74
Left-Hand Door and Cab Marker Lights
Cable Assembly Replacement ........................ 7-54
Leveling Air Springs Will Not Operate................. 2-30
Leveling Valve and linkage Replacement/
Adjustment.................................................... 16-8
Panel Liners Replacement ...............................16-13
M1081 Cab Clearance and Marker Lights
Lower Cable Assembly Replacement............... 7-55
M1081 Cab Clearance and Marker Lights
Upper Cable Assembly Replacement............... 7-56
M1081 Cab Roof Replacement .......................... 16-4
Mirror Replacement .......................................... 18-7
Convex Mirror
Initial Installation................................................. 20-3
RH Convex Mirror Initial Installation ...................... 20-2
RH Convex Mirror Replacement ..........................18-13
One or More Cab Top Marker Lights
Do Not Illuminate ........................................... 2-16
Power Distribution Panel (PDP) to
Cab Ground Cable Replacement...................... 7-76
Rear Cab Support Assembly
Replacement ................................................. 16-7
Right-Hand Door and Cab Marker
Lights Cable Assembly Replacement............... 7-57
Step Replacement...........................................16-11
Storage Box Replacement/Repair .....................16-17
Tilt and Spare Tire Retainer
Troubleshooting ............................................. 2-32
Tilt, Spare Tire Retainer, and
Suspension Compression Will Not
Work ............................................................ 2-30
to Chassis Ground Strap Replacement............... 7-71
Will Not Raise or Lower Properly ....................... 2-32
WTEC II Cab Transmission Harness
Replacement ................................................. 7-86
WTEC III Cab Transmission Harness
Replacement ................................................. 7-87
Cable
Auxiliary Panel Cable Assembly
Replacement (All Models Except
M1079 W/O winch) ........................................ 7-49
Battery/Battery Cables Replacement ................. 7-46
Battery to Shunt Cable Assembly
Replacement ................................................. 7-69
Battery to Starter Cable Assembly
Replacement ................................................. 7-70

Subject
Para

C (Cont)

Cable (Cont)
Central Tire Inflation System (CTIS)
Cable Assembly Replacement ........................ 7-53
Engine Control Cable Assembly
Replacement ................................................. 7-72
Front Intervehicular 12 VDC (7 Pin)
Cable Replacement........................................ 7-73
Front Lights Cable Assembly
Replacement ................................................. 7-74
Left-Hand Door and Cab Marker
Lights Cable Assembly Replacement............... 7-54
Load Sensing Valve and Control Cable
Replacement/Adjustment...............................11-10
Rear Lights Cable Assembly
Replacement ................................................. 7-75
M1079 Air Conditioner Power Cable
Replacement ................................................20-82
M1079 Heater Control Cable
Replacement ................................................20-43
M1079 Heater Fuel Pump Power Cable
Replacement ................................................20-49
M1079 Heater Power Cable
Replacement ................................................20-42
M1079 Heater Thermostat Cable
Replacement ................................................20-45
M1079 W/O Winch Auxiliary Panel
Cable Assembly Replacement ........................ 7-50
M1079 110/208 VAC Power In/Out
Cable Replacement.......................................16-68
M1079 12/24 VDC Power Cable
Replacement ................................................. 7-51
M1081 Cab Clearance and Marker
Lights Lower Cable Assembly
Replacement ............................................... 7-55
M1081 Cab Clearance and Marker
Lights Upper Cable Assembly
Replacement ............................................... 7-56
NATO Power Cable Replacement ...................... 7-63
Power Distribution Panel (PDP) to
Cab Ground Cable Replacement...................... 7-76
Power Take-Off (PTO) Cable Assembly
Replacement ................................................. 7-77
Rear Intervehicular 12 VDC (7 Pin)
Cable Replacement........................................ 7-78
Rear Intervehicular 24 VDC (12 Pin)
Cable Replacement........................................ 7-79
Right-Hand Door and Cab Marker Lights
Cable Assembly Replacement ........................ 7-57
Start and Charging Cable Assembly
Replacement ................................................. 7-82

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

C (Cont)

Cable (Cont)
Starter to Chassis Ground Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-83
Starter to Shunt 24 VDC Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-84
STE/ICE-R Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-58
Throttle Control Cable Replacement/
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Throttle Position Sensor (TPS) Cable
Assembly Replacement . . . . . . . . . . . . . . . 4-16
Troop Transport Alarm Cable
Assembly Replacement . . . . . . . . . . . . . . 20-79
Warning Light Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 22-2
Winch Control Valve Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-85
Windshield Washer Pump
Electromagnetic Interference (EMI)
Cable Assembly Replacement
. . . . . . . . . . 7-60
Windshield Wiper Electromagnetic
Interference (EMI) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-61
WTEC II Dashboard Cable Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 7-10
WTEC III Dashboard Cable Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 7-11
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP)
12 VDC Cable Replacement . . . . . . . . . . . . 7-80
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP)
24 VDC Cable Replacement . . . . . . . . . . . . 7-81
11K Self-Recovery Winch (SRW)
Cable Replacement . . . . . . . . . . . . . . . . . . 17-5
200 Amp Alternator to Terminal Block
12 VDC Cable Replacement . . . . . . . . . . . 20-59
200 Amp Alternator to Terminal Block
24 VDC Cable Replacement . . . . . . . . . . . 20-61
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC
Cable Replacement . . . . . . . . . . . . . . . . . 20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC
Cable Replacement . . . . . . . . . . . . . . . . . 20-68
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Battery Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-66

C (Cont)

Cable (Cont)
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Battery Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-67
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-60
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-62
Caging
Rear Spring Brake Caging . . . . . . . . . . . . . . 11-6
Central
Tire Inflation System (CTIS) Cable
Assembly Replacement . . . . . . . . . . . . . . . 7-53
Tire Inflation System (CTIS) Does Not
Deflate Tires . . . . . . . . . . . . . . . . . . . . . . . 2-16
Tire Inflation System (CTIS) Does Not
Inflate Tires . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Tire Inflation System (CTIS) Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Tire Inflation System (CTIS) ECU
Indicates No Fault Code But Fails
to Inflate or Deflate
. . . . . . . . . . . . . . . . . 2-24
Tire Inflation System (CTIS) ECU
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-6
Tire Inflation System (CTIS) Hose
Assemblies, Manifold Valve, Kneeling
Valve and Bracket Replacement . . . . . . . . . 12-5
Tire Inflation System (CTIS) Overspeed
Indicator Does Not Operate . . . . . . . . . . . . 2-16
Tire Inflation System (CTIS) Repeatedly
Resumes Cycling 30 Seconds After
Indicator Lights Stop Flashing . . . . . . . . . . . 2-24
Tire Inflation System (CTIS)
Troubleshooting . . . . . . . . . . . . . . . . . . . . . 2-24
Charge
Radiator/Charge Air Cooler Replacement
. . . . 6-2
Turbocharger to Charge Air Cooler Tube
and Hoses Replacement
. . . . . . . . . . . . . . . 4-4
Charging
Start and Charging Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-82
Chassis
Introduction, Body, Chassis, and
Accessory Items Maintenance
. . . . . . . . . . 18-1
M1079 Chassis Ground Lug
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-69

INDEX-6
Change 1

TM 9-2320-365-20-1

Change 2
INDEX-7

Subject
Para

C (Cont)

Checking and Stenciling High/Low Hand
Throttle Positions ........................................... 4-22
Chemical
Alarm Does Not Operate................................... 2-16
Alarm Kit Cable Assembly
Replacement ................................................. 7-52
Detector Does Not Operate............................... 2-16
Detector Indicator Does Not Operate.................. 2-16
Circuit
Breaker, Diode, and Relay Replacement .............. 7-9
Breaker Does Not Operate................................ 2-16
M1079 15/20/30 and 50 Amp AC
Circuit Breaker Replacement..........................16-64
M1079 200 Amp AC Circuit Breaker
Replacement ................................................16-65
M1079 5/20 Amp DC Circuit Breaker
Replacement ................................................16-61
Circuits
24 VDC Circuits Do Not Operate........................ 2-16
12 VDC and/or 24 VDC Circuits Do
Not Operate................................................... 2-16
Cleaning
General Cleaning Instructions............................ 2-38
Clearance
And Marker Light Assemblies
Replacement ................................................. 7-31
Intervehicle Clearance Lights Do Not
Operate......................................................... 2-16
M1079 Clearance and Marker Lights
Replacement ................................................16-60
Code
WTEC II Code Reading and Code
Clearing Procedures......................................... 8-4
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Emits Eight
Seconds of Beeps and/or
Transmission Does Not Shift Gears............. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 14................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 15................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 16................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 24 and/or 33 and
Any Sub Code........................................... 2-17

Subject
Para

C (Cont)

Code (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 32 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays
Main Code 41, 42, 44, 45, 66, and/or
69 and Any Sub Code................................ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 43 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 52 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 57 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 21 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 51 Sub Code 10, 12, 21, 43,
45, or 65................................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 25 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 53 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 54 Sub Code 01, 07, 10, 12, 17,
21, 23, 27, 32, 34, 43, 45, 54,
56, 65, 70, 71, 72, 80, 81, 82,
83, 85, 86, 92, 93, 95, 96,
or 97.................................................. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 55 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 56 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 13 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 23 and Any Sub Code.......................... 2-17

TM 9-2320-365-20-1

INDEX-8
Change 2

SUBJECT INDEX (CONT)

Subject
Para

C (Cont)

Code (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Does Not
Illuminate..................................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 14................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 15................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 16................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 24
and/or 33 and Any Sub Code......................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 32
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 42,
44, 45, 46, 66, and/or 69 and Any
Sub Code.................................................. 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 52
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 57
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 21
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 51
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 25
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 53
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 54
and Any Sub Code....................................... 2-17

Subject
Para

C (Cont)

Code (Cont)
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 55
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 56
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 13
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Indicator Displays
"--" and/or Transmission Does
Not Shift Gears.......................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 23
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Does Not Illuminate ............... 2-17
Column
Steering Column Replacement .......................... 13-6
Common Tools and Equipment, Vehicle
Compressor
Air Compressor Governor Adjustment................11-29
Air Compressor Inlet and Outlet Coolant
Tubes Replacement ....................................... 6-11
Noisy Air Compressor Operation........................ 2-21
Conduit
M1079 Door Ajar Switch/Box and
Conduit Replacement ....................................16-55
M1079 Fan Switch/Box and Conduit
Replacement ................................................16-54
M1079 Field Telephone Binding Post/
Box and Conduit Replacement .......................16-51
M1079 Interior Lights Switch/Box and
Conduit Replacement ....................................16-50
M1079 Lighting Fixture and Conduit
Replacement ................................................16-59
M1079 110 VAC Outlet/Box and
Conduit Replacement ....................................16-53
M1079 110/208 VAC Power Entry
Panel and Conduit Replacement.....................16-70
M1079 12/24 VDC Power Entry Panel
and Conduit Replacement..............................16-72
M1079 24 VDC Binding Post/Box
and Conduit Replacement..............................16-52

TM 9-2320-365-20-1

Change 2
INDEX-9

Subject
Para

C (Cont)

Coolant
Bypass Tube Replacement ................................. 6-7
In Engine Lubrication Oil ................................... 2-12
Loss of Coolant................................................ 2-15
Lower Coolant Hose Replacement ..................... 6-10
Temperature Gage Sensor
Replacement ................................................. 7-37
Temperature Light Switch
Replacement ................................................. 7-22
Upper Coolant Tube and Hoses
Replacement ................................................... 6-9
Cooler
Radiator/Charge Air Cooler
Replacement ................................................... 6-2
Transmission Oil Cooler Hoses Initial
Installation..................................................... 8-14
Transmission Oil Cooler Hoses
Replacement ................................................. 8-15
Transmission Oil Cooler Hose
Bracket Replacement ..................................... 8-16
Transmission Oil Cooler Replacement................ 8-10
Transmission Oil Cooler Tubes
Replacement ................................................. 8-11
Cooling
Introduction, Cooling System
Maintenance.................................................... 6-1
Oil In Cooling System....................................... 2-15
System ........................................................... 1-13
System Troubleshooting ................................... 2-15
Cover
Cold Weather Radiator Cover
Installation/Removal ......................................18-12
Defrost Cover Replacement ............................... 18-8
M1079 Heater and Air Conditioner
Cover Replacement .......................................16-31
M1079 Raceway Cover Replacement ................16-45
M1079 Vent Cover Replacement.......................16-32
M1079 Window Cover Replacement ..................16-41
Rim Cover Initial Installation............................... 20-4
Rim Cover Replacement...................................12-10
Crane
Light Material Handling Crane (LMHC)
Assembly/Disassembly.................................20-70
Light Material Handling Crane (LMHC)
Boom Replacement.......................................20-74
Light Material Handling Crane (LMHC)
Boom Sheave Replacement ...........................20-75
Light Material Handling Crane (LMHC)
Control Box Repair........................................20-77
Light Material Handling Crane (LMHC)
Does Not Operate.......................................... 2-31
Light Material Handling Crane (LMHC)
Hoist IN Does Not Operate.............................. 2-31

C (Cont)

Crane (Cont)
Light Material Handling Crane (LMHC)
Hoist OUT Does Not Operate.......................... 2-31
Light Material Handling Crane (LMHC)
Mast and Swing Assembly Repair ..................20-78
Light Material Handling Crane (LMHC)
Replacement ................................................20-71
Light Material Handling Crane (LMHC)
Turret Replacement.......................................20-76
Light Material Handling Crane (LMHC)
Weight Block and Wire Rope
Replacement/Repair......................................20-72
Light Material Handling Crane (LMHC)
Winch Replacement/Repair............................20-73
Crankcase Breather Replacement........................... 3-5
Cranks
Engine Cranks But Does Not Start..................... 2-12
Engine Cranks But Does Not Start..................... 2-16
Engine Cranks But Does Not Start or
Engine Stalls After Starting............................. 2-13
Engine Does Not Crank .................................... 2-12
Engine Does Not Crank .................................... 2-16
CTIS
Central Tire Inflation System (CTIS)
Cable Assembly Replacement ........................ 7-53
Central Tire Inflation System (CTIS)
Does Not Operate.......................................... 2-16
Central Tire Inflation System (CTIS)
ECU Replacement ......................................... 12-6
Central Tire Inflation System (CTIS)
Hose Assemblies, Manifold Valve,
Kneeling Valve and Bracket
Replacement............................................. 12-5
Central Tire Inflation System (CTIS) ECU
Indicates No Fault Code But Fails to
Inflate or Deflate........................................... 2-24
Central Tire Inflation System (CTIS)
Troubleshooting ............................................. 2-24
Does Not Deflate Tires...................................... 2-16
Does Not Inflate Tires ....................................... 2-16
Does Not Operate ............................................ 2-16
Five Central Tire Inflation System (CTIS)
ECU Indicator Lights Flashing ......................... 2-24
Four CTIS ECU Indicator Lights
Flashing........................................................ 2-24
Front Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-8
Rear Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-9

TM 9-2320-365-20-1

INDEX-10
Change 2

SUBJECT INDEX (CONT)

Subject
Para

C (Cont)

CTIS (Cont)
Overspeed Indicator Does Not Operate............... 2-16
Primary and Central Tire Inflation
System (CTIS) Air Hoses
Replacement ................................................. 23-2
Repeatedly Resumes Cycling 30
Seconds After Indicator Lights Stop
Flashing........................................................ 2-24
Wheel Bearing/Central Tire Inflation
System (CTIS) Seal Replacement ................... 10-2

D

Dashboard
WTEC II Dashboard Cable Assembly
Replacement/Repair....................................... 7-10
WTEC III Dashboard Cable Assembly
Replacement/Repair....................................... 7-11
Defrost Cover Replacement .................................. 18-8
Deprocessing
Unpacking and Deprocessing .............................. 2-4
Destruction of Army Materiel to Prevent
Enemy Use..................................................... 1-3
Detector
Chemical Detector Does Not Operate................. 2-16
Chemical Detector Indicator Does Not
Operate......................................................... 2-16
Differences Between Models................................... 1-9
Differential
Axle Differential(s) Noisy................................... 2-25
Spider Assembly Replacement.......................... 10-3
Digitization Kit
Aft Storage Box Replacement...........................20-90
Circuit Breaker Replacement ............................20-87
Co-Drivers Seat Replacement ...........................20-92
Drivers Storage Box Replacement.....................20-91
Installation ......................................................20-86
No Power to Digitization Rack ........................... 2-31
No Power to Driver Visual Enhancement
(DVE) ........................................................... 2-31
No Power to Enhanced Position Location
Reporting System (EPLRS) ............................ 2-31
No Power to Mobile Tracking system (MTS)........ 2-31
No Power to Mobile Tracking System (MTS)
Sense........................................................... 2-31
No Power to Precision Lightweight Global
Positioning System Receiver (PLGR)............... 2-31
No Power to SINCGAR/Force XXI Battle
Command Brigade and Below (FBCB).............. 2-31
Power Cable Replacement ...............................20-88
Radio Rack Replacement.................................20-89
Removal .........................................................20-86

Subject
Para

D (Cont)
Dimmer
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
Switch Replacement......................................... 7-12
Disassembly
General Disassembly Instructions...................... 2-37
Door
Left-Hand Door and Cab Marker lights
Cable Assembly Replacement ........................ 7-54
LH Door and/or LH Front Marker Lights
Do Not Illuminate ........................................... 2-16
M1079 Door Ajar Switch and Conduit
Replacement 16-55
Door (Cont)
M1079 Door Seal, Retainer, and Latch
Striker Replacement......................................16-30
M1079 Pod Door and Panel
Replacement ................................................16-22
M1079 LH Door Assembly
Replacement/Repair......................................16-36
M1079 RH Door Assembly
Replacement/Repair......................................16-35
M1079 Van Door Open Light Does
Not Illuminate and Audible
Alarm Does Not Operate............................... 2-16
M1081 Door Repair/Adjustment ......................... 16-6
Panel Stowage Door Assembly Repair ..............16-18
Repair/Adjustment (All Models Except
M1081) ......................................................... 16-5
Drag Link Replacement/Repair.............................. 13-3
Drive
Belt and Tension Pulley Replacement ................ 6-13
Shaft and Universal Joint Replacement................. 9-2
Shaft Hinging Inspection ..................................... 9-3
Shaft or Universal Joint
Unusually Noisy When Operating.................... 2-18
Dryer
Air Dryer Does Not Operate............................... 2-16
Air Dryer Purges Constantly.............................. 2-21
Air Dryer Replacement/Repair ........................... 23-6

E

ECU
Central Tire Inflation System (CTIS)
ECU Indicates No Fault Code But
Fails to Inflate or Deflate............................... 2-24
Central Tire Inflation System (CTIS)
ECU Replacement ......................................... 12-6
Five Central Tire Inflation System (CTIS)
ECU Indicator Lights Flashing ......................... 2-24

TM 9-2320-365-20-1

Change 2
INDEX-11

Subject
Para

E (Cont)

ECU (Cont)
Four CTIS ECU Indicator Lights
Flashing........................................................ 2-24
Frequency ECU Replacement ........................... 7-28
M1079 Air Conditioner ECU Connector
Replacement ................................................16-47
Windshield Wiper ECU Replacement ................... 7-62
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) and Bracket
Replacement and Calibration............................. 8-2
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Illumination
Does Not Dim................................................ 2-16
WTEC III Transmission ECU
Replacement ................................................... 8-7
Electrical
Gages Replacement......................................... 7-14
Introduction, Electrical System
Maintenance.................................................... 7-1
System ........................................................... 1-14
System Does Not Maintain a Charge ................. 2-16
System Troubleshooting ................................... 2-16
Emergency
Cab Lift Procedure............................................ 19-8
Gladhand Two-Way Check Valve
Replacement ................................................11-24
M1079 Blackout/Emergency Light
Replacement ................................................16-58
M1079 Emergency Light(s) Does Not
Operate......................................................... 2-16
EMI
Windshield Washer Pump
Electromagnetic Interference (EMI)
Cable Assembly Replacement ........................ 7-60
Windshield Wiper Electromagnetic
Interference (EMI) Cable
Replacement ................................................. 7-61
Engine
Air Intake System ............................................ 1-11
And Transmission Oil Sampling Valves
Replacement ................................................... 3-6
Control Cable Assembly Replacement ............... 7-72
Coolant In Engine Lubrication Oil....................... 2-12
Cranks But Does Not Start................................ 2-12
Cranks But Does Not Start................................ 2-16
Cranks But Does Not Start or
Engine Stalls After Starting............................. 2-13
Does Not Crank ............................................... 2-12
Does Not Crank ............................................... 2-16
Excessive Black or Gray
Exhaust Smoke............................................. 2-12
Excessive Engine Oil Consumption ................. 2-12

Subject
Para

E (Cont)

Engine (Cont)
Exhaust System Unusually Noisy or
Vibrates Excessively During Engine
Operation...................................................... 2-14
Fan and Fan Clutch Assembly
Replacement ................................................. 6-14
Fan Does Not Turn Off Using Radiator
Fan Off Switch............................................... 2-16
Fan Runs Constantly........................................ 2-16
High Engine Temperature Indicator
Does Not Operate.......................................... 2-16
High Engine Temperature Indicator
Illuminates..................................................... 2-16
Introduction, Engine Maintenance........................ 3-1
Low Engine Oil Pressure................................... 2-12
Low Engine Power............................................ 2-12
Master Power Switch Does Not Shut
Down Engine................................................. 2-16
Oil Pressure Gage Does Not Operate
or Is Inaccurate.............................................. 2-16
Oil Pressure Indicator Does Not
Operate......................................................... 2-16
Overheats........................................................ 2-12
Overheats........................................................ 2-15
Overspeeds on Start......................................... 2-12
Speed Sensor Replacement/
Adjustment.................................................... 7-38
Stalls at Low RPM ........................................... 2-12
System Troubleshooting ................................... 2-12
Too Much Engine Vibration ............................... 2-12
Transmission Engine Speed Sensor
Replacement ................................................. 7-43
Equipment Characteristics, Capabilities,
and Features ................................................... 1-7
Ether
Sensor Replacement ........................................ 7-39
Start Switch Does Not Illuminate ....................... 2-16
Start Does Not Operate .................................... 2-16
Starting Aid Does Not Operate .......................... 2-13
Starting Aid Replacement ................................. 4-15
Excessive
Black or Gray Exhaust Smoke.......................... 2-12
Braking Distance.............................................. 2-20
Condensation in Fuel........................................ 2-16
Engine Oil Consumption ................................... 2-12
Play When Turning Steering Wheel.................... 2-26
Exhaust
Excessive Black or Gray Exhaust
Smoke.......................................................... 2-12
Fumes in Cab.................................................. 2-14
Introduction, Exhaust System
Maintenance.................................................... 5-1
Muffler and Exhaust Heat Shields
Replacement ................................................... 5-2
Pipe Replacement.............................................. 5-3
System Troubleshooting ................................... 2-14

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

E (Cont)

Exhaust (Cont)
System Unusually Noisy or Vibrates
Excessively During Engine Operation . . . . . 2-14
White Exhaust Smoke . . . . . . . . . . . . . . . . . 2-12

F

Fan
Engine Fan and Fan Clutch Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 6-14
Engine Fan Does Not Turn Off Using
Radiator Fan Off Switch . . . . . . . . . . . . . . . 2-16
Engine Fan Runs Constantly
. . . . . . . . . . . . 2-16
M1079 Fan Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-67
M1079 Fan Does Not Operate . . . . . . . . . . . 2-16
M1079 Fan Switch/Box and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-54
Off Indicator Does Not Operate . . . . . . . . . . . 2-16
Personnel Heater Fan Does Not Operate
. . . 2-16
Radiator Fan Off Switch Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
Radiator Fan Shrouds Replacement . . . . . . . . 6-4
Solenoid Replacement . . . . . . . . . . . . . . . . . 7-23
Fender and Splash Guard Replacement . . . . . 16-10
Filter
Air Filter Restriction Gauge
Replacement . . . . . . . . . . . . . . . . . . . . . . . 24-2
Fuel Filter and Filter Base
Replacement . . . . . . . . . . . . . . . . . . . . . . . 4-14
Fuel Filter Tubes Replacement . . . . . . . . . . . 4-10
Intake Air Cleaner Filter Element, Air
Cleaner Assembly, and Particle
Extraction Tube Replacement . . . . . . . . . . . . 4-2
M1079 Air Filter Replacement . . . . . . . . . . . 16-33
Oil Filter Replacement . . . . . . . . . . . . . . . . . . 3-4
Transmission Oil Filter Replacement . . . . . . . . 8-9
Five Central Tire Inflation System (CTIS)
ECU Indicator Lights Flashing . . . . . . . . . . . . 2-24
Flasher Unit Replacement . . . . . . . . . . . . . . . . 7-24
Floor
Cab Floor Covering Replacement . . . . . . . . 16-12
M1079 Van Body Floor Tapping Plate
Initial Installation (Serial Numbers 001
through 190) . . . . . . . . . . . . . . . . . . . . . . 16-43

F (Cont)

Fluorescent
All M1079 Fluorescent Lights Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Fluorescent Lights Do Not
Operate In Blackout Override Mode
. . . . . . 2-16
Folding
M1079 Folding Step Replacement
. . . . . . . 16-28
Foot Control Valve and Brake Foot Pedal
Replacement . . . . . . . . . . . . . . . . . . . . . . . 11-9
Forms
Maintenance Forms, Records, and
Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Four CTIS ECU Indicator Lights Flashing . . . . . 2-24
Frame
Introduction, Frame, Towing
Attachments, and Drawbars
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 14-1
M1079 Blackout Shield and Frame
Replacement/Repair
. . . . . . . . . . . . . . . . 16-37
M1079 Pod Frame Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-23
M1079 Window Main Frame
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-40
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 2-33
Frequency ECU Replacement . . . . . . . . . . . . . 7-28
Front
And Rear Hazard Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
And Rear Turn Signals Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Axle Central Tire Inflation System
(CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-8
Axle Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-15
Axle Shock Absorber Replacement . . . . . . . . 15-3
Brake Air Chamber Replacement . . . . . . . . . 11-7
BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI
. . . . . . . . . . . . . . . . . . . . . 2-16
Brake Air Pressure Gage Does Not
Operate or Is Inaccurate
. . . . . . . . . . . . . . 2-16
Brake Plunger Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4

INDEX-12
Change 1

TM 9-2320-365-20-1

Subject
Para
Subject
Para

F (Cont)

Front (Cont)
Brake Shoes Replacement/Adjustment . . . . . 11-2
Brakes Do Not Apply . . . . . . . . . . . . . . . . . . 2-20
Brakes Overheat and/or Do Not Release . . . . 2-20
Bumper Replacement . . . . . . . . . . . . . . . . . . 14-2
Composite Front Light Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 7-33
Gladhand Replacement . . . . . . . . . . . . . . . 11-21
Hazard Lights Do Not Illuminate . . . . . . . . . . 2-16
Intervehicular 12 VDC (7 Pin) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-73
Left or Right Front Turn Signals Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Lights Cable Assembly Replacement
. . . . . . 7-74
One or Both Front Blackout Marker
Lights Do Not Illuminate . . . . . . . . . . . . . . . 2-16
RH Door and/or RH Front Marker
Lights Do Not Illuminate . . . . . . . . . . . . . . . 2-16
Wheel Toe-In Alignment/Adjustment . . . . . . . 13-5
Fuel
Consumption Too High . . . . . . . . . . . . . . . . . 2-13
Excessive Condensation in Fuel . . . . . . . . . . 2-16
Filter and Filter Base Replacement . . . . . . . . 4-14
Filter Tubes Replacement . . . . . . . . . . . . . . . 4-10
Gage Does Not Illuminate
. . . . . . . . . . . . . . 2-16
Gage Does Not Operate or
Is Inaccurate . . . . . . . . . . . . . . . . . . . . . . . 2-16
Hoses Replacement . . . . . . . . . . . . . . . . . . . . 4-9
Introduction, Fuel System Maintenance . . . . . . 4-1
M1079 Heater Fuel Pump Power Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-49
M1079 Heater Fuel Pump
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-48
M1079 Heater Fuel Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-47
M1079 Heater Fuel Tubes/Hoses
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-46
Pressure Regulating Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Ratio Control Tube Replacement
. . . . . . . . . . 4-6
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
System Bleeding . . . . . . . . . . . . . . . . . . . . . 4-11
System Troubleshooting . . . . . . . . . . . . . . . . 2-13
Tank and Brackets Replacement
. . . . . . . . . . 4-8
/Water Separator and Filter
Replacement . . . . . . . . . . . . . . . . . . . . . . . 4-13

G

Gage
Engine Oil Pressure Gage Does Not
Operate or Is Inaccurate
. . . . . . . . . . . . . . 2-16

G (Cont)

Gage (Cont)
FRONT BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front Brake Air Pressure Gage Does Not
Operate or Is Inaccurate
. . . . . . . . . . . . . . 2-16
FUEL Gage Does Not Illuminate . . . . . . . . . . 2-16
FUEL Gage Does Not Operate or Is
Inaccurate . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
OIL PRESS Gage Does Not Illuminate . . . . . 2-16
REAR BRAKE AIR Gage Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
REAR BRAKE AIR Pressure Gage Does
Not Operate or Is Inaccurate
. . . . . . . . . . . 2-16
VOLTS Gage Does Not Illuminate . . . . . . . . . 2-16
VOLTS Gage Does Not Operate or Is
Inaccurate . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
WATER TEMP Gage Does Not Illuminate . . . 2-16
WATER TEMP Gage Does Not Operate
or Is Inaccurate . . . . . . . . . . . . . . . . . . . . . 2-16
Gages
Electrical Gages Replacement
. . . . . . . . . . . 7-14
Introduction, Gages (Non-Electrical)
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 24-1
General
Assembly Instructions
. . . . . . . . . . . . . . . . . 2-41
Cleaning Instructions . . . . . . . . . . . . . . . . . . 2-38
Disassembly Instructions
. . . . . . . . . . . . . . . 2-37
Inspection Instructions . . . . . . . . . . . . . . . . . 2-39
Installation Instructions . . . . . . . . . . . . . . . . . 2-42
Maintenance Procedures . . . . . . . . . . . . . . . . 2-8
Removal Instructions . . . . . . . . . . . . . . . . . . 2-36
Repair Instructions . . . . . . . . . . . . . . . . . . . . 2-40
Gladhand
Emergency Gladhand Two-Way Check
Valve Replacement . . . . . . . . . . . . . . . . . 11-24
Front Gladhand Replacement . . . . . . . . . . . 11-21
Rear Gladhand Replacement . . . . . . . . . . . 11-22
Service Gladhand Two-Way Check
Valve Replacement . . . . . . . . . . . . . . . . . 11-23
Gladhands
No Air Pressure Present At
Rear Gladhands
. . . . . . . . . . . . . . . . . . . . 2-21
Governor Linkage Replacement . . . . . . . . . . . . 4-12
Gravel
Gravel Deflector and Gravel Deflector
Extension Replacement . . . . . . . . . . . . . . . 14-2
Ground
Alternator Ground Strap Replacement . . . . . . 7-64
Cab to Chassis Ground Strap
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-71
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

Change 1
INDEX-13

TM 9-2320-365-20-1

INDEX-14
Change 2

SUBJECT INDEX (CONT)

Subject
Para

G (Cont)

Ground (Cont)
M1079 Chassis Ground Lug
Replacement ................................................16-69
Power Distribution Panel (PDP) to Cab
Ground Cable Replacement ............................ 7-76
Starter to Chassis Ground Cable
Replacement ................................................. 7-83
Guides
M1079 Sling Spreader and Guides
Replacement ................................................16-24

H

Hand
Checking and Stenciling High/Low Hand
Throttle Positions ........................................... 4-22
Receipt Manual and Inventory of
Equipment....................................................... 2-5
Right-Hand Door and Cab Marker Lights
Cable Assembly Replacement ........................ 7-57
Throttle Lever Replacement/
Adjustment.................................................... 4-17
Handle(s)
Boarding Handles Replacement........................16-76
M1079 Roof Bail Handle Replacement...............16-27
Hard to Steer ...................................................... 2-26
Hatch
Roof Hatch Replacement (All Models
Except M1081) .............................................16-75
Hazard
Front Hazard Lights Do Not Illuminate................ 2-16
Lights Switch Does Not Illuminate...................... 2-16
Rear Hazard Lights Do Not Illuminate................. 2-16
Headlight
One or Both Headlight High Beams Do
Not Illuminate ................................................ 2-16
One or Both Headlight Low Beams Do
Not Illuminate ................................................ 2-16
and Housing Replacement/Repair/
Adjustment.................................................... 7-34
Headlights
One or Both Headlights (High and Low
Beams) Do Not Illuminate............................... 2-16
Heater
Fan Control Switch Replacement......................18-10
M1079 Heater and Air Conditioner
Cover Replacement .......................................16-31

Subject
Para

H (Cont)

Heater (Cont)
M1079 Heater Deflector/Duct
Replacement ................................................20-50
M1079 Heater Does Not Operate....................... 2-16
M1079 Heater Fuel Pump Power Cable
Replacement ................................................20-49
M1079 Heater Fuel Pump
Replacement ................................................20-48
M1079 Heater Fuel Regulator
Replacement ................................................20-47
M1079 Heater Fuel Tubes/Hoses
Replacement ................................................20-46
M1079 Heater Connector
Replacement ................................................16-49
M1079 Heater Control Cable
Replacement ................................................20-43
M1079 Heater Kit Installation
/Removal......................................................20-41
M1079 Heater Power Cable
Replacement ................................................20-42
M1079 Heater Replacement .............................20-51
M1079 Heater Thermostat Cable
Replacement ................................................20-45
M1079 Heater Thermostat Connector
Replacement ................................................16-48
M1079 Heater Thermostat
Replacement ................................................20-44
Personnel Heater Fan Does Not
Operate......................................................... 2-16
Personnel Heater Hoses Replacement ................. 6-8
Personnel Heater Illumination Does
Not Operate................................................... 2-16
Personnel Heater Replacement/Repair............... 18-9
High
Beams Indicator Does Not Operate.................... 2-16
Engine Temperature Indicator Does
Not Operate................................................... 2-16
Engine Temperature Indicator Illuminates............ 2-16
Hinging
Drive Shaft Hinging Inspection ............................. 9-3
Hoist
Light Material Handling Crane (LMHC)
Hoist IN Does Not Operate.............................. 2-31
Light Material Handling Crane (LMHC)
Hoist OUT Does Not Operate.......................... 2-31
Horn
And Bracket Replacement ................................ 7-44
Does Not Operate ............................................ 2-16

TM 9-2320-365-20-1

Change 2
INDEX-15

Subject
Para

H (Cont)

Hose
Lower Coolant Hose Replacement ..................... 6-10
Transmission Oil Cooler Hose
Bracket Replacement ..................................... 8-16
Transmission Scavenge Pump Hose
Replacement ................................................. 8-12
Hoses
Brake Air Hoses Replacement..........................11-19
Fuel Hoses Replacement.................................... 4-9
M1079 Heater Tubes/Hoses
Replacement ................................................20-46
Personnel Heater Hoses Replacement ................. 6-8
Power Steering Hoses and Tube
Replacement ................................................. 13-7
Primary and Central Tire Inflation
System (CTIS) Air Hoses
Replacement ................................................. 23-2
Transmission Oil Cooler Hoses Initial
Installation..................................................... 8-14
Transmission Oil Cooler Hoses
Replacement ................................................. 8-15
Upper Coolant Tube and Hoses
Replacement ................................................... 6-9
Windshield Washer Hoses and Connector
Replacement ................................................. 18-6
11K Self-Recovery Winch (SRW) Hoses
Replacement ................................................. 17-7
Hubs
Introduction, Wheels, Tires, and Hubs
Maintenance.................................................. 12-1
Hydraulic
Air/Hydraulic Power Unit and Bracket
Replacement/Repair....................................... 19-3
Back-Up Hydraulic Pump Replacement.............. 19-2
Cab Hydraulic Cylinder Replacement ................19-10
Cab Hydraulic Latch Replacement/
Adjustment.................................................... 19-6
Introduction, Hydraulic System
Maintenance.................................................. 19-1
Loss of Hydraulic Pressure (Single
Stage Pump) ................................................. 2-23
Manifold Filter Replacement .............................. 19-5
Manifold Replacement/Repair............................ 19-4
Oil Filter Assembly Service/
Replacement ................................................19-12
Reservoir and Bracket Replacement..................19-13
System Troubleshooting ................................... 2-23
Steering Hydraulic System
Troubleshooting ............................................. 2-29

Subject
Para

I

Illumination
Personnel Heater Illumination Does Not
Operate......................................................... 2-16
Inclinometer Replacement ...................................16-77
Indicator
CTIS Overspeed Indicator Does Not
Operate......................................................... 2-16
CTIS Repeatedly Resumes Cycling 30
Seconds After Indicator Lights Stop
Flashing........................................................ 2-24
Engine Oil Pressure Indicator Does Not
Operate......................................................... 2-16
Fan Off Indicator Does Not Operate.................... 2-16
Five Central Tire Inflation System (CTIS)
ECU Indicator Lights Flashing ......................... 2-24
Four CTIS ECU Indicator Lights
Flashing........................................................ 2-24
Front Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI............................................... 2-16
High Beams Indicator Does Not
Operate......................................................... 2-16
High Engine Temperature Indicator Does
Not Operate................................................... 2-16
High Engine Temperature Indicator Illuminates ...... 2-16
Left Turn Signal Indicator Does Not
Operate......................................................... 2-16
Lighted Indicator Display Replacement/
Repair........................................................... 7-16
Master Stop Indicator Does Not
Operate......................................................... 2-16
Parking Brake Indicator and/or
Emergency Brake Indicator
Does Not Operate ........................................ 2-16
PTO Indicator Does Not Operate........................ 2-16
Rear Brake Air Indicator Does Not
Illuminate When Air Pressure Is
Below 65 PSI............................................... 2-16
Right Turn Signal Indicator Does Not
Operate......................................................... 2-16
Transmission Temperature Indicator
Does Not Operate.......................................... 2-16
Turn Signal Indicators and High Beams
on Indicator Do Not Operate............................ 2-16
Indicators
Turn Signal Indicators and High Beams
on Indicator Do Not Operate............................ 2-16
Inflation
Central Tire Inflation System (CTIS)
Cable Assembly Replacement ........................ 7-53
Central Tire Inflation System (CTIS)
Does Not Operate.......................................... 2-16
Central Tire Inflation System (CTIS)
ECU Replacement ......................................... 12-6

TM 9-2320-365-20-1

INDEX-16
Change 2

SUBJECT INDEX (CONT)

Subject Para

I (Cont)

Inflation (Cont)
Central Tire Inflation System (CTIS)
Hose Assemblies, Manifold Valve,
Kneeling Valve and Bracket
Replacement ................................................. 12-5
Central Tire Inflation System (CTIS)
Troubleshooting ............................................. 2-24
Front Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-8
Primary and Central Tire Inflation
System (CTIS) Air Hoses
Replacement ................................................. 23-2
Rear Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-9
Wheel Bearing/Central Tire Inflation
System (CTIS) Seal Replacement ................... 10-2
Initial Installation
Convex Mirror Initial Installation.......................... 20-3
RH Convex Mirror Initial Installation .................... 20-2
Rim Cover Initial Installation............................... 20-4
Transmission Oil Cooler Hoses
Initial Installation ............................................ 8-14
Inspection
Drive Shaft Hinging Inspection ............................. 9-3
General Inspection Instructions.......................... 2-39
Installation
General Installation Instructions......................... 2-42
Instructions
General Assembly Instructions .......................... 2-41
General Cleaning Instructions............................ 2-38
General Disassembly Instructions...................... 2-37
General Inspection Instructions.......................... 2-39
General Installation Instructions......................... 2-42
General Removal Instructions ............................ 2-36
General Repair Instructions ............................... 2-40
Instrument Panel Assembly
Replacement/Repair......................................... 7-15
Intake Air Cleaner Filter Element, Air
Cleaner Assembly, and Particle Extraction
Tube Replacement ............................................. 4-2
Intervehicle
Clearance Lights Do Not Operate....................... 2-16
Left Turn Signal Does Not Illuminate................... 2-16
Right Turn Signal Does Not Illuminate................ 2-16
Stoplights Do Not Illuminate.............................. 2-16
Taillights Do Not Operate.................................. 2-16

Subject
Para

I (Cont)

Intervehicular
Front Intervehicular 12 VDC (7 Pin)
Cable Replacement........................................ 7-73
Rear Intervehicular 12 VDC (7 Pin)
Cable Replacement........................................ 7-78
Rear Intervehicular 24 VDC (12 Pin)
Cable Replacement........................................ 7-79
Introduction
Air System Maintenance................................... 23-1
Armament/Sighting and Fire Control
Materiel Maintenance..................................... 21-1
Body and Cab Maintenance .............................. 16-1
Body, Chassis, and Accessory Items
Maintenance.................................................. 18-1
Brake System Maintenance.............................. 11-1
Cooling System Maintenance.............................. 6-1
Electrical Illuminating Equipment
Maintenance.................................................. 22-1
Electrical System Maintenance........................... 7-1
Engine Maintenance........................................... 3-1
Exhaust System Maintenance............................. 5-1
Frame, Towing Attachments, and
Drawbars Maintenance................................... 14-1
Front and Rear Axle Maintenance...................... 10-1
Fuel System Maintenance .................................. 4-1
Gages (Non-Electrical) Maintenance.................. 24-1
Hydraulic System Maintenance......................... 19-1
Propeller Shaft Maintenance................................ 9-1
Special Purpose Kits Maintenance .................... 20-1
Steering System Maintenance........................... 13-1
Suspension System Maintenance...................... 15-1
To Logic Tree Troubleshooting........................... 2-10
Transmission Maintenance.................................. 8-1
Wheels, Tires, and Hubs Maintenance............... 12-1
11K Self-Recovery Winch (SRW)
Maintenance.................................................. 17-1
Inversion
Valve Replacement..........................................11-12
Valve Replacement........................................... 23-4

J

Joint
Drive Shaft or Universal Joint
Unusually Noisy When Operating.................... 2-18

TM 9-2320-365-20-1

Subject
Para
Subject
Para

K

Kick Panel Replacement . . . . . . . . . . . . . . . . . 16-3
Kit
M1078/M1081 S-280 Shelter Tiedown
Kit Installation/Removal . . . . . . . . . . . . . . 20-84
M1079 Air Conditioner Kit Installation/
Removal . . . . . . . . . . . . . . . . . . . . . . . . . 20-81
M1079 Heater Kit Installation/Removal
. . . . 20-41
200 Amp Alternator Kit Installation
. . . . . . . 20-54
200 Amp Alternator Kit Removal . . . . . . . . . 20-55

L

Ladder
M1079 Ladder, Mounting Bracket, and
Stowage Bracket Replacement/Repair . . . . 16-34
Lamp
Test Switch Does Not Illuminate . . . . . . . . . . 2-16
Large Quantity of Moisture Expelled From
Air Reservoirs . . . . . . . . . . . . . . . . . . . . . . 2-21
Latch
and Cab Anchor Brackets Replacement
. . . 16-74
Cab Hydraulic Latch Replacement/
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 19-6
M1079 Door Seal, Retainer, and Latch
Striker Replacement
. . . . . . . . . . . . . . . . 16-30
M1079 Rubber Bumper and Tee Latch
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-29
M1079 Window Latch and Prop
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-38
Power Distribution Panel (PDP) Cover
and Latch Replacement/Adjustment
. . . . . . 16-2
Leans to One Side or Rear Of Vehicle
Sags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Left
Hand Door and Cab Marker Lights
Cable Assembly Replacement
. . . . . . . . . . 7-54
Intervehicle Left Turn Signal Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
LH
Door and/or LH Front Marker Lights Do
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 LH Door Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-36
Lift
M1079 Lift Casting Replacement
. . . . . . . . 16-25
Lifting Plate Replacement . . . . . . . . . . . . . . . . . 3-2
Light
Amber Warning Light Assembly Repair . . . . 20-83
Amber Warning Light Switch Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16

L (Cont)

Light (Cont)
Backup Light Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-29
Backup Light Does Not Illuminate . . . . . . . . . 2-16
Blackout Drive Light Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Blackout Drive Light Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30
Clearance and Marker Light Assemblies
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-31
Composite Front Light Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . . 7-33
Main Light Switch Replacement
. . . . . . . . . . 7-17
Material Handling Crane (LMHC)
Assembly/Disassembly . . . . . . . . . . . . . . . 20-70
Material Handling Crane (LMHC) Boom
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-74
Material Handling Crane (LMHC) Boom
Sheave Replacement . . . . . . . . . . . . . . . . 20-75
Material Handling Crane (LMHC) Control
Box Repair . . . . . . . . . . . . . . . . . . . . . . . 20-77
Material Handling Crane (LMHC) Does
Not Operate
. . . . . . . . . . . . . . . . . . . . . . . 2-31
Material Handling Crane (LMHC) Hoist
IN Does Not Operate . . . . . . . . . . . . . . . . . 2-31
Material Handling Crane (LMHC) Hoist
OUT Does Not Operate . . . . . . . . . . . . . . . 2-31
Material Handling Crane (LMHC) Mast
and Swing Assembly Repair . . . . . . . . . . . 20-78
Material Handling Crane (LMHC)
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-71
Material Handling Crane (LMHC) Turret
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-76
Material Handling Crane (LMHC) Weight
Block and Wire Rope Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-72
Material Handling Crane (LMHC) Winch
Replacement/Repair
. . . . . . . . . . . . . . . . 20-73
M1079 Van Body Clearance Marker Light
Does Not Illuminate . . . . . . . . . . . . . . . . . . 2-16
M1079 Van Door Open Light Does Not
Illuminate and Audible Alarm Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
No Overspeed Warning Light and/or
Overspeed Pressure Change . . . . . . . . . . . 2-24
Trailer Left Stop/Turn Light Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
Trailer Right Stop/Turn Light Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Warning Light Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 22-2
Warning Light Does Not Illuminate
. . . . . . . . 2-16

Change 1
INDEX-17

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

L (Cont)

Lighted Indicator Display Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16
Lighting
M1079 Lighting Fixture and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-59
M1079 Lighting Fixture(s) DS80 and/
or DS81 Do Not Operate . . . . . . . . . . . . . . 2-16
M1079 Lighting Fixture(s) DS82 and/
or DS83 Do Not Operate . . . . . . . . . . . . . . 2-16
Lights
All M1079 Van Body Fluorescent Lights
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
All M1079 Van Body Marker Lights
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
All Marker Lights Do Not Illuminate
In Normal Mode . . . . . . . . . . . . . . . . . . . . . 2-16
Cab Clearance Marker Lights Cable
Assembly Replacement . . . . . . . . . . . . . . . 7-59
Blackout Marker Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Five Central Tire Inflation System (CTIS)
ECU Indicator Lights Flashing
. . . . . . . . . . 2-24
Four CTIS ECU Indicator Lights
Flashing . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Front and Rear Hazard Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front Hazard Lights Do Not Illuminate . . . . . . 2-16
Front Lights Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-74
Hazard Lights Switch Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Intervehicle Clearance Lights Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Left Door and/or LH Front Marker Lights
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
Left-Hand Door and Cab Marker Lights
Cable Assembly Replacement
. . . . . . . . . . 7-54
M1079 Blackout Light(s) Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Emergency Light(s) Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Clearance and Marker Lights
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-60
M1079 Fluorescent Lights Do Not
Operate In Blackout Override Mode
. . . . . . 2-16
M1079 Interior Lights Switch/Box and
Conduit Replacement . . . . . . . . . . . . . . . . 16-50

L (Cont)

Lights (Cont)
M1081 Cab Clearance and Marker
Lights Lower Cable Replacement . . . . . . . . 7-55
M1081 Cab Clearance and Marker
Lights Upper Cable Replacement . . . . . . . . 7-56
One or Both Composite Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
One or Both Front Blackout Marker
Lights Do Not Illuminate . . . . . . . . . . . . . . . 2-16
One or Both Rear Blackout Marker
Lights Do Not Illuminate . . . . . . . . . . . . . . . 2-16
One or More Cab Top Marker Lights
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
Parking Lights Do Not Illuminate . . . . . . . . . . 2-16
Rear Hazard Lights Do Not Illuminate . . . . . . 2-16
Rear Lights Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-75
RH Door and/or RH Front Marker
Lights Do Not Illuminate . . . . . . . . . . . . . . . 2-16
Right-Hand Door and Cab Marker
Lights Cable Assembly Replacement
. . . . . 7-57
Side and/or Rear Marker Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Two Steady Mode Lights Illuminate
on Central Tire Inflation System
(CTIS) ECU . . . . . . . . . . . . . . . . . . . . . . . 2-24
LMHC
Light Material Handling Crane (LMHC)
Assembly/Disassembly . . . . . . . . . . . . . . . 20-70
Light Material Handling Crane (LMHC)
Boom Replacement . . . . . . . . . . . . . . . . . 20-74
Light Material Handling Crane (LMHC)
Boom Sheave Replacement . . . . . . . . . . . 20-75
Light Material Handling Crane (LMHC)
Control Box Repair
. . . . . . . . . . . . . . . . . 20-77
Light Material Handling Crane (LMHC)
Does Not Operate . . . . . . . . . . . . . . . . . . . 2-31
Light Material Handling Crane (LMHC)
Hoist IN Does Not Operate . . . . . . . . . . . . . 2-31
Light Material Handling Crane (LMHC)
Hoist OUT Does Not Operate . . . . . . . . . . . 2-31
Light Material Handling Crane (LMHC)
Mast and Swing Assembly Repair . . . . . . . 20-78
Light Material Handling Crane (LMHC)
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-71
Light Material Handling Crane (LMHC)
Turret Replacement . . . . . . . . . . . . . . . . . 20-76

INDEX-18
Change 1

TM 9-2320-365-20-1

Change 2
INDEX-19

Subject
Para

L (Cont)

LMHC (Cont)
Light Material Handling Crane (LMHC)
Weight Block and Wire Rope
Replacement/Repair......................................20-72
Light Material Handling Crane (LMHC)
Winch Replacement/Repair............................20-73
Load Sensing Valve and Control Cable
Replacement/Adjustment .................................11-10
Location and Description of Major
Components...................................................... 1-8
Loss
of Coolant........................................................ 2-15
of Hydraulic Pressure (Single Stage
Pump)........................................................... 2-23
Low
Engine Oil Pressure ......................................... 2-12
Engine Power .................................................. 2-12
Pressure Transmitter Replacement .................... 7-88
Pressure Transmitter Two-Way Check
Valve Replacement .......................................11-28
Windshield Wiper Does Not Operate
On Low Speed............................................... 2-16
Lower
Cab Does Not Lower......................................... 2-32
Coolant Hose Replacement............................... 6-10
M1079 Lower Spreader Bar
Replacement ................................................16-21
Lubrication
AOAP Sampling Intervals....................................H-3
General.............................................................H-1
Intervals.............................................................H-6
Key...................................................................H-5
Local Views.......................................................H-8
Locator Views....................................................H-7
Notes................................................................H-9
Oil Filters ..........................................................H-2
Warranty Hardtime Statement .............................H-4

M

Machine Gun
Ring Center Seat Replacement.......................... 21-5
Ring Lower Platform Replacement ..................... 21-3
Ring Replacement............................................ 21-2
Ring Roof Support Replacement ........................ 21-6
Ring Top Platform Replacement......................... 21-4
Main Light Switch Replacement ............................ 7-17
Maintenance
Common Tools and Equipment, Vehicle
Maintenance.................................................... 2-1
Forms, Records, and Reports.............................. 1-2

Subject
Para

M (Cont)

Maintenance (Cont)
General Maintenance Procedures ........................ 2-8
Introduction...................................................... 2-34
Manifold
Hydraulic Manifold Filter Replacement................ 19-5
Hydraulic Manifold Replacement/
Repair........................................................... 19-4
Valve Assembly Replacement ........................... 12-7
Marker
All Marker Lights Do Not Illuminate
In Normal Mode ............................................. 2-16
Left Door and/or LH Front Marker Lights
Do Not Illuminate ........................................... 2-16
Left-Hand Door and Cab Marker Lights
Cable Assembly Replacement ........................ 7-54
M1079 Clearance and Marker Lights
Replacement ................................................16-60
Trailer Marker/Taillights Do Not
Illuminate ...................................................... 2-16
Mast
Light Material Handling Crane (LMHC)
Mast and Swing Assembly Repair ..................20-78
Master
Power Switch Does Not Shut Down Engine ........ 2-16
Power Switch Does Not Operate........................ 2-16
Master Stop Indicator Does Not Operate................ 2-16
Mechanical
Resilient Mount and Mechanical Stop
Replacement ................................................. 15-2
Mirror
Cab Mirror Replacement ................................... 18-7
Convex Mirror Initial Installation.......................... 20-3
RH Convex Mirror Initial Installation .................... 20-2
RH Convex Mirror Replacement ........................18-13
Module
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
WTEC II Vehicle Interface Module (VIM)
Replacement/Repair......................................... 8-6
Motor
Windshield Wiper Motor Replacement................ 18-4
Muffler and Exhaust Heat Shields
Replacement ..................................................... 5-2
M1079
Air Conditioner Does Not Operate...................... 2-16
Air Conditioner ECU Connector
Replacement ................................................16-47
Air Filter Replacement .....................................16-33
All M1079 Fluorescent Lights Do Not
Operate......................................................... 2-16
All M1079 Van Body Marker Lights Do
Not Operate................................................... 2-16
Blackout Light(s) Does Not Operate................... 2-16

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

M (Cont)

M1079 (Cont)
Blackout Override Switch Replacement . . . . 16-56
Blackout Switch Replacement . . . . . . . . . . . 16-57
Blackout Shield and Frame Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-37
Blackout/Emergency Light
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-58
Chassis Ground Lug Replacement . . . . . . . 16-69
Clearance and Marker Lights
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-60
Door Ajar Switch and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-55
Door Seal, Retainer, and Latch Striker
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-30
Emergency Light(s) Does Not Operate
. . . . . 2-16
Fan Assembly Replacement/Repair . . . . . . . 16-67
Fan Does Not Operate . . . . . . . . . . . . . . . . . 2-16
Fan Switch/Box and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-54
Field Phone 1 and/or 2 Binding Post
Does Not Operate . . . . . . . . . . . . . . . . . . . 2-16
Field Telephone Binding Post/Box and
Conduit Replacement . . . . . . . . . . . . . . . . 16-51
Fluorescent Lights Do Not Operate In
Blackout Override Mode . . . . . . . . . . . . . . . 2-16
Folding Step Replacement . . . . . . . . . . . . . 16-28
Heater and Air Conditioner Cover
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-31
Heater Connector Replacement
. . . . . . . . . 16-49
Heater Control Cable Replacement . . . . . . . 20-43
Heater Deflector/Duct Replacement
. . . . . . 20-50
Heater Does Not Operate . . . . . . . . . . . . . . . 2-16
Heater Fuel Pump Power Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-49
Heater Fuel Pump Replacement . . . . . . . . . 20-48
Heater Fuel Regulator Replacement . . . . . . 20-47
Heater Fuel Tubes/Hoses Replacement
. . . 20-46
Heater Kit Installation/Removal . . . . . . . . . . 20-41
Heater Power Cable Replacement
. . . . . . . 20-42
Heater Replacement
. . . . . . . . . . . . . . . . . 20-51
Heater Thermostat Cable Replacement . . . . 20-45
Heater Thermostat Connector
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-48
Heater Thermostat Replacement . . . . . . . . . 20-44
Interior Lights Switch/Box and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-50
Ladder, Mounting Bracket, and Stowage
Bracket Replacement/Repair
. . . . . . . . . . 16-34

M (Cont)

M1079 (Cont)
Lift Casting Replacement . . . . . . . . . . . . . . 16-25
Lighting Fixture and Conduit
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-59
Lighting Fixture(s) DS80 and/or DS81
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
Lighting Fixture(s) DS82 and/or DS83
Do Not Operate . . . . . . . . . . . . . . . . . . . . . 2-16
LH Door Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-36
Lower Spreader Bar Replacement
. . . . . . . 16-21
Pod Door and Panel Replacement
. . . . . . . 16-22
Pod Frame Replacement/Repair . . . . . . . . . 16-23
Raceway Replacement . . . . . . . . . . . . . . . . 16-46
Raceway Cover Replacement . . . . . . . . . . . 16-45
Relay Box Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-63
RH Door Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-35
Roof Bail Handle Replacement . . . . . . . . . . 16-27
Rubber Bumper and Tee Latch
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-28
Sling Bearing Angle Replacement . . . . . . . . 16-26
Sling Spreader and Guides
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-24
Tapping Plate Replacement . . . . . . . . . . . . 16-42
Upper Sub-Frame Replacement . . . . . . . . . 16-20
Van Body Floor Tapping Plate Initial
Installation (Serial Numbers 001
through 190) . . . . . . . . . . . . . . . . . . . . . . 16-43
Van Body Interior Accessory Mounting
Locations
. . . . . . . . . . . . . . . . . . . . . . . . 16-44
Van Body Clearance Marker Light
Does Not Illuminate . . . . . . . . . . . . . . . . . . 2-16
Van Body Replacement . . . . . . . . . . . . . . . 16-19
Van Door Open Light Does Not Illuminate
and Audible Alarm Does Not Operate . . . . . 2-16
Van Preparation for Air Transport . . . . . . . . 16-73
Vent Cover Replacement . . . . . . . . . . . . . . 16-32
Window Cover Replacement . . . . . . . . . . . . 16-41
Window Latch and Prop Replacement . . . . . 16-38
Window Main Frame Replacement . . . . . . . 16-40
Window Sash Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-39
110 VAC and 24 VDC Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-62

INDEX-20
Change 1

TM 9-2320-365-20-1

Change 2
INDEX-21

Subject
Para

M (Cont)

M1079 (Cont)
110 VAC Outlet J230 Does Not
Operate......................................................... 2-16
110 VAC Outlet J231 Does Not
Operate......................................................... 2-16
110 VAC Outlet J232 and J233 Do Not
Operate In Blackout Override Mode.................. 2-16
110 VAC Outlet J232 Does Not
Operate......................................................... 2-16
110 VAC Outlet J232 Does Not
Operate In Normal Mode................................. 2-16
110 VAC Outlet J233 Does Not
Operate......................................................... 2-16
110 VAC Outlet J234 Does Not
Operate......................................................... 2-16
110 VAC Outlet J235 Does Not
Operate......................................................... 2-16
110 VAC Outlet/Box and Conduit
Replacement ................................................16-53
110 VAC Power Does Not Operate.................... 2-16
110/208 VAC Power Distribution Panel
Replacement ................................................16-66
110/208 VAC Power Entry Panel and
Conduit Replacement ....................................16-70
110/208 VAC Power In/Out Cable
Replacement ................................................16-68
12/24 VDC Power Entry Connector
Replacement ................................................16-71
12/24 VDC Power Entry Panel
Replacement ................................................16-72
15/20/30 and 50 Amp AC Circuit Breaker
Replacement ................................................16-64
200 Amp AC Circuit Breaker
Replacement ................................................16-65
24 VDC Binding Post Does Not
Operate......................................................... 2-16
24 VDC Binding Post/Box and Conduit
Replacement ................................................16-52
5/20 Amp DC Circuit Breaker
Replacement ................................................16-61
M1081
Cab Clearance and Marker Lights Lower
Cable Assembly Replacement ........................ 7-55
Cab Clearance and Marker Lights Upper
Cable Assembly Replacement ........................ 7-56
Cab Roof Replacement ..................................... 16-4
Door Repair/Adjustment.................................... 16-6
Parachute Suspension Slides
Replacement ................................................. 14-3

N

NATO Power Cable Replacement.......................... 7-63
No
Air Pressure Present At Rear
Gladhands..................................................... 2-21

Subject
Para

N (Cont)

No (Cont)
Overspeed Warning Light and/or
Overspeed Pressure Change........................... 2-24
Response When Turning Steering
Wheel........................................................... 2-26
Power to Digitization Rack ................................ 2-31
Power to Driver Visual Enhancement (DVE)........ 2-31
Power to Enhanced Position Location
Reporting System (EPLRS) ............................ 2-31
Power to Mobile Tracking system (MTS)............. 2-31
Power to Mobile Tracking System (MTS)
Sense........................................................... 2-31
Power to Precision Lightweight Global
Positioning System Receiver (PLGR)............... 2-31
Power to SINCGAR/Force XXI Battle
Command Brigade and Below (FBCB).............. 2-31
Noisy Air Compressor Operation........................... 2-21
Nozzle
Windshield Wiper and Nozzle
Replacement ................................................. 18-3

O

Official Nomenclature, Names and
Designations...................................................... 1-4
Oil
Engine Oil Filter Replacement ............................. 3-4
Engine Oil Pressure Gage Does Not
Operate or Is Inaccurate................................. 2-16
Engine Oil Pressure Indicator Does Not
Operate......................................................... 2-16
Hydraulic Oil Filter Assembly Service/
Replacement ................................................19-12
In Cooling System............................................ 2-15
Low Engine Oil Pressure................................... 2-12
PRESS Gage Does Not Illuminate..................... 2-16
Pressure Switch Replacement........................... 7-40
Pressure Transmitter Replacement .................... 7-41
Transmission Oil Cooler Hoses
Initial Installation ............................................ 8-14
Transmission Oil Cooler Hoses
Replacement ................................................. 8-15
Transmission Oil Cooler Hose
Bracket Replacement ..................................... 8-16
Transmission Oil Cooler Replacement................ 8-10
Transmission Oil Cooler Tubes
Replacement ................................................. 8-11
Transmission Oil Fill Tube
Replacement ................................................. 8-13
Transmission Oil Filter Replacement.................... 8-9
One
Or Both Blackout Stoplights Do Not
Illuminate ...................................................... 2-16

TM 9-2320-365-20-1

INDEX-22
Change 2

SUBJECT INDEX (CONT)

Subject
Para

O (Cont)

One (Cont)
Or Both Composite Lights Do Not
Illuminate ...................................................... 2-16
Or Both Front Blackout Marker Lights
Do Not Illuminate ........................................... 2-16
Or Both Headlight High Beams Do Not
Illuminate 2-16
Or Both Headlight Low Beams Do Not
Illuminate ...................................................... 2-16
Or Both Headlights (High and Low
Beams) Do Not Illuminate............................... 2-16
Or Both Rear Blackout Marker Lights
Do Not Illuminate ........................................... 2-16
Or Both Stoplights Do Not Illuminate.................. 2-16
Or More Cab Top Marker Lights Do Not
Illuminate ...................................................... 2-16
Orifice Tube Assembly Replacement....................... 4-7
Overflow
Radiator Overflow Tank and Bracket
Replacement/Repair......................................... 6-3
Overheat
Front Brakes Overheat and/or Do Not
Release ........................................................ 2-20
Rear Brakes Overheat....................................... 2-20
Overheats
Engine Overheats............................................. 2-12
Engine Overheats............................................. 2-15
Overspeed
No Overspeed Warning Light and/or
Overspeed Pressure Change........................... 2-24

P

Panel
Auxiliary Panel Cable Assembly
Replacement (All Models Except
M1079 W/O Winch) ....................................... 7-49
Auxiliary Panel Does Not Illuminate ................... 2-16
Auxiliary Panel, Instrument Panel, and
Personnel Heater Do Not Illuminate................. 2-16
Auxiliary Panel Replacement............................... 7-8
Auxiliary Panel Switch Does Not
Illuminate ...................................................... 2-16
Instrument Panel Assembly
Replacement/Repair....................................... 7-15
Kick Panel Replacement................................... 16-3
M1079 Pod Door and Panel
Replacement ................................................16-22
M1079 W/O Winch Auxiliary Panel Cable
Assembly Replacement.................................. 7-50
M1079 110/208 VAC Power Distribution
Panel Replacement.......................................16-66

Subject
Para

P (Cont)

Panel (Cont)
M1079 110/208 VAC Power Entry Panel
and Conduit Replacement..............................16-70
M1079 12/24 VDC Power Entry Panel
and Conduit Replacement..............................16-72
Power Distribution Panel (PDP) Cover
and Latch Replacement/Adjustment ................ 16-2
Power Distribution Panel (PDP) to Cab
Ground Cable Replacement ............................ 7-76
Stowage Door Assembly Repair .......................16-18
100 Amp Reverse Polarity Relay to Power
Distribution Panel (PDP) 12 VDC Cable
Replacement ................................................. 7-80
100 Amp Reverse Polarity Relay to Power
Distribution Panel (PDP) 24 VDC Cable
Replacement ................................................. 7-81
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC Cable
Replacement ................................................20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC Cable
Replacement ................................................20-68
Parachute
M1081 Parachute Suspension
Slides Replacement ....................................... 14-3
Park Control Two-Way Check Valve
Replacement ..................................................11-17
Parking
Brake Indicator and/or Emergency Brake
Indicator Does Not Operate............................. 2-16
Brake Does Not Release................................... 2-20
Brake Does Not Apply ...................................... 2-20
Lights Do Not Illuminate.................................... 2-16
PDP
Power Distribution Panel (PDP) Cover and
Latch Replacement/Adjustment....................... 16-2
Power Distribution Panel (PDP) to Cab
Ground Cable Replacement ............................ 7-76
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 12 VDC
Cable Replacement........................................ 7-80
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 24 VDC
Cable Replacement........................................ 7-81

TM 9-2320-365-20-1

Change 2
INDEX-23

Subject
Para

P (Cont)

PDP (Cont)
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC
Cable Replacement.......................................20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC
Cable Replacement.......................................20-68
Personnel
Heater Fan Does Not Operate........................... 2-16
Heater Hoses Replacement................................. 6-8
Heater Illumination Does Not Operate................. 2-16
Heater Replacement/Repair............................... 18-9
Pipe
Exhaust Pipe Replacement ................................. 5-3
Platform
Machine Gun Ring Lower Platform
Replacement ................................................. 21-3
Machine Gun Ring Top Platform
Replacement ................................................. 21-4
Plunger
Front Brake Plunger Assembly
Replacement/Repair....................................... 11-4
Rear Brake Plunger Assembly
Replacement/Repair....................................... 11-5
PMCS
Preventive Maintenance Checks and
Services (PMCS) Introduction............................ 2-7
Preventive Maintenance Checks and
Services (PMCS) Table..................................... 2-9
Pod
M1079 Pod Door and Panel
Replacement ................................................16-22
M1079 Pod Frame Replacement/Repair ............16-23
Power
Distribution Panel (PDP) Cover and
Latch Replacement/Adjustment....................... 16-2
Distribution Panel (PDP) to Cab Ground
Cable Replacement........................................ 7-76
Low Engine Power............................................ 2-12
M1079 Air Conditioner Power Cable
Replacement ................................................20-82
M1079 Heater Fuel Pump Power Cable
Replacement ................................................20-49
M1079 Heater Power Cable
Replacement ................................................20-42
M1079 110/208 VAC Power Distribution
Panel Replacement.......................................16-66
M1079 110/208 VAC Power Does Not
Operate......................................................... 2-16
M1079 101/208 VAC Power Entry Panel
and Conduit Replacement..............................16-70

Subject
Para

P (Cont)

Power (Cont)
M1079 110/208 VAC Power In/Out
Cable Replacement.......................................16-68
M1079 12/24 VDC Power Entry
Connector Replacement ................................16-71
M1079 12/24 VDC Power Entry Panel
and Conduit Replacement..............................16-72
Master Power Switch Does Not Shut
Down Engine................................................. 2-16
No Power to Digitization Rack ........................... 2-31
No Power to Driver Visual Enhancement
(DVE) ........................................................... 2-31
No Power to Enhanced Position Location
Reporting System (EPLRS) ............................ 2-31
No Power to Mobile Tracking system (MTS)........ 2-31
No Power to Mobile Tracking System (MTS)
Sense........................................................... 2-31
No Power to Precision Lightweight Global
Positioning System Receiver (PLGR)............... 2-31
No Power to SINCGAR/Force XXI Battle
Command Brigade and Below (FBCB).............. 2-31
Steering Hoses and Tube Replacement.............. 13-7
Steering Pump Replacement............................. 13-9
Steering Pump Reservoir and Bracket
Replacement ................................................. 13-8
Take-Off (PTO) Cable Assembly
Replacement ................................................. 7-77
Take Off (PTO) Troubleshooting ......................... 2-19
100 Amp Reverse Polarity Relay to Power
Distribution Panel (PDP) 12 VDC Cable
Replacement ................................................. 7-80
100 Amp Reverse Polarity Relay to Power
Distribution Panel (PDP) 24 VDC Cable
Replacement ................................................. 7-81
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC Cable
Replacement ................................................20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC Cable
Replacement ................................................20-68
Powertrain .......................................................... 1-10
Preparation
for Storage or Shipment .................................... 2-44
for Storage or Shipment Introduction .................. 2-43
M1079 Van Preparation For Air
Transport......................................................16-73
Pressure
Air Pressure Transmitter Replacement ............... 7-36
Engine Oil Pressure Gage Does Not
Operate or Is Inaccurate................................. 2-16
Engine Oil Pressure Indicator Does Not
Operate......................................................... 2-16

TM 9-2320-365-20-1

INDEX-24
Change 2

SUBJECT INDEX (CONT)

Subject
Para

P (Cont)

Pressure (Cont)
Low Pressure Transmitter Replacement ............. 7-88
Oil Pressure Switch Replacement...................... 7-40
Oil Pressure Transmitter Replacement ............... 7-41
Protection Valve Replacement..........................11-27
Switch Replacement......................................... 23-8
Preventive
Maintenance Checks and Services (PMCS)
Introduction ..................................................... 2-7
Maintenance Checks and Services (PMCS)
Table .............................................................. 2-9
Primary and Central Tire Inflation System
(CTIS) Air Hoses Replacement
23-2
Procedures
General Maintenance Procedures ........................ 2-8
Propeller
Introduction, Propeller Shaft
Maintenance.................................................... 9-1
Shaft Troubleshooting....................................... 2-18
PTO
Power Take-Off (PTO) Cable Assembly
Replacement ................................................. 7-77
Does Not Engage............................................. 2-19
Does Not Operate ............................................ 2-16
Indicator Does Not Operate............................... 2-16
Power Take Off (PTO) Troubleshooting............... 2-19
Pulls
Wanders, Pulls to One Side, or
Shimmies...................................................... 2-26
Wanders, Pulls to One Side, or
Shimmies...................................................... 2-27
Pump
Loss of Hydraulic Pressure (Single Stage
Pump)........................................................... 2-23
M1079 Heater Fuel Pump Power Cable
Replacement ................................................20-49
M1079 Heater Fuel Pump
Replacement ................................................20-48
Power Steering Pump Replacement................... 13-9
Power Steering Pump Reservoir and
Bracket Replacement ..................................... 13-8
Power Steering Pump Reservoir Filter
Replacement ................................................13-10
Transmission Scavenge Pump Hose
Replacement ................................................. 8-12
Water Pump and Fittings
Replacement ................................................. 6-12
Windshield Washer Pump
Electromagnetic Interference (EMI)
Cable Assembly Replacement ........................ 7-60
Pushbutton
Start Inhibit Pushbutton Does Not
Operate......................................................... 2-16

Subject
Para

P (Cont)

Pushbutton (Cont)
Start Inhibit Pushbutton Switch
Replacement ................................................. 7-19
Starter Pushbutton Switch
Replacement ................................................. 7-20
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) and Bracket
Replacement and Calibration
8-2
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Emits Eight
Seconds of Beeps and/or
Transmission Does Not Shift Gears............. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 14................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 15................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 16................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 24 and/or 33 and Any
Sub Code.................................................. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 32 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays
Main Code 41, 42, 44, 45, 66, and/or
69 and Any Sub Code................................ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 43 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 52 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 57 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 21 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 51 Sub Code 10, 12, 21, 43,
45, or 65................................................... 2-17

TM 9-2320-365-20-1

Change 2
INDEX-25

Subject
Para

P (Cont)

Pushbutton (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 25 and Any Sub Code............................ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 53 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 54 Sub Code 01, 07, 10, 12, 17,
21, 23, 27, 32, 34, 43, 45, 54,
56, 65, 70, 71, 72, 80, 81, 82,
83, 85, 86, 92, 93, 95, 96,
or 97.................................................. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 55 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 56 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 13 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 23 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Does Not
Illuminate..................................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 14................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 15................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 16................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 24
and/or 33 and Any Sub Code......................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 32
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 42,
44, 45, 46, 66, and/or 69 and Any
Sub Code.................................................. 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 52
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 57
and Any Sub Code....................................... 2-17

Subject
Para

P (Cont)

Pushbutton (Cont)
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 21
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 51
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 25
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 53
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 54
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 55
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 56
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 13
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Indicator Displays
"--" and/or Transmission Does
Not Shift Gears.......................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 23
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Does Not Illuminate ............... 2-17

R

Raceway
M1079 Raceway Replacement .........................16-46
M1079 Raceway Cover Replacement ................16-45
Radiator
Cold Weather Radiator Cover Installation/
Removal.......................................................18-12
/Charge Air Cooler Replacement.......................... 6-2
Radiator Fan Off Switch Does
Not Illuminate ................................................ 2-16
Fan Shrouds Replacement.................................. 6-4
Overflow Tank and Bracket Replacement/
Repair............................................................. 6-3
Radio Does Not Operate...................................... 2-16

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

R (Cont)

Rear
Axle Central Tire Inflation System
(CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-9
Axle Shaft Replacement . . . . . . . . . . . . . . . . 10-4
Axle Shock Absorber Replacement . . . . . . . . 15-4
BRAKE AIR Gage Does Not Illuminate . . . . . 2-16
BRAKE AIR Pressure Gage Does Not

Operate or Is Inaccurate . . . . . . . . . . . . . . . . 2-16
Brake Air Indicator Does Not Illuminate
When Air Pressure Is Below 65 PSI . . . . . . 2-16
Brake Air Chamber Replacement . . . . . . . . . 11-8
Brake Plunger Assembly Replacement/
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
Brake Shoes Replacement/Adjustment . . . . . 11-3
Brakes Do Not Apply . . . . . . . . . . . . . . . . . . 2-20
Brakes Overheat . . . . . . . . . . . . . . . . . . . . . 2-20
Cab Support Assembly Replacement
. . . . . . 16-7
Front and Rear Hazard Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front and Rear Turn Signals Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Gladhand Replacement . . . . . . . . . . . . . . . 11-22
Hazard Lights Do Not Illuminate . . . . . . . . . . 2-16
Intervehicular 12 VDC (7 Pin) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-78
Intervehicular 24 VDC (12 Pin) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-79
Leans to One Side or Rear Of Vehicle
Sags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Rear Lights Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-75
No Air Pressure Present At Rear
Gladhands
. . . . . . . . . . . . . . . . . . . . . . . . 2-21
One or Both Rear Blackout Marker Lights
Do Not Illuminate . . . . . . . . . . . . . . . . . . . . 2-16
Side and/or Rear Marker Lights Do Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Spring Brake Caging . . . . . . . . . . . . . . . . . . 11-6
Stabilizer Bar Replacement/Repair . . . . . . . . 15-5
11K Self-Recovery Winch (SRW) Rear
Roller Fairlead Replacement
. . . . . . . . . . . 17-3
Records
Maintenance Forms, Records, and
Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Regulator
M1079 Heater Fuel Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-47

R (Cont)

Relay
Anti-Compounding Relay Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-11
Circuit Breaker, Diode, and Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 7-9
M1079 Relay Box Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . 16-63
M1079 110 VAC and 24 VDC Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-62
Relay Valve Replacement
. . . . . . . . . . . . . 11-13
100 Amp Alternator to Reverse Polarity
Relay 12 VDC Cable Replacement . . . . . . . 7-65
100 Amp Alternator to Reverse Polarity
Relay 24 VDC Cable Replacement . . . . . . . 7-66
100 Amp Reverse Polarity Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-27
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 12 VDC
Cable Replacement . . . . . . . . . . . . . . . . . . 7-80
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 24 VDC
Cable Replacement . . . . . . . . . . . . . . . . . . 7-81
200 Amp Reverse Polarity Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-58
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Battery Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-66
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-60
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Battery Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-67
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Load Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-62
Removal
General Removal Instructions . . . . . . . . . . . . 2-36
Repair
General Repair Instructions
. . . . . . . . . . . . . 2-40
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Reporting Equipment Improvement
Recommendations (EIR)
. . . . . . . . . . . . . . . . 1-5
Reports
Maintenance Forms, Records, and
Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

INDEX-26
Change 1

TM 9-2320-365-20-1

Change 2
INDEX-27

Subject
Para

R (Cont)

Reservoir
Hydraulic Reservoir and Bracket
Replacement ................................................19-13
Power Steering Pump Reservoir and
Bracket Replacement ..................................... 13-8
Reservoirs
Large Quantity of Moisture Expelled
From Air Reservoirs........................................ 2-21
Resilient Mount and Mechanical Stop
Replacement ................................................... 15-2
Restriction
Air Filter Restriction Gauge
Replacement ................................................. 24-2
Reverse
100 Amp Alternator to Reverse Polarity
Relay 12 VDC Cable Replacement .................. 7-65
100 Amp Alternator to Reverse Polarity
Relay 24 VDC Cable Replacement .................. 7-66
100 Amp Reverse Polarity Relay
Replacement ................................................. 7-27
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 12 VDC
Cable Replacement........................................ 7-80
100 Amp Reverse Polarity Relay to
Power Distribution Panel (PDP) 24 VDC
Cable Replacement........................................ 7-81
200 Amp Reverse Polarity Relay
Replacement ................................................20-58
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Battery Cable
Replacement ................................................20-66
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Load Cable
Replacement ................................................20-60
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Battery Cable
Replacement ................................................20-67
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Load Cable
Replacement ................................................20-62
RH
Door and/or RH Front Marker Lights Do
Not Illuminate ................................................ 2-16
M1079 RH Door Assembly Replacement/
Repair..........................................................16-35
Right
Door and/or RH Front Marker Lights Do
Not Illuminate ................................................ 2-16
Hand Door and Cab Marker Lights Cable
Assembly Replacement.................................. 7-57
Intervehicle Right Turn Signal Does Not
Illuminate ...................................................... 2-16

Subject
Para

R (Cont)

Right (Cont)
Left or Right Front Turn Signals Do Not
Operate......................................................... 2-16
Turn Signal Indicator Does Not
Operate......................................................... 2-16
Rim
Cover Initial Installation........................................ 20-4
Cover Replacement............................................12-10
Ring
Machine Gun Ring Center Seat
Replacement ................................................. 21-5
Machine Gun Ring Lower Platform
Replacement ................................................. 21-3
Machine Gun Ring Replacement........................ 21-2
Machine Gun Ring Roof Support
Replacement ................................................. 21-6
Machine Gun Ring Top Platform
Replacement ................................................. 21-4
Rocker Switches Replacement ............................. 7-18
Roller
11K Self-Recovery Winch (SRW) Front
Roller Fairlead Replacement ........................... 17-2
11K Self-Recovery Winch (SRW) Rear
Roller Fairlead Replacement ........................... 17-3
Roof
Hatch Replacement (All Models Except
M1081) ........................................................16-74
M1079 Roof Bail Handle Replacement...............16-27
M1081 Cab Roof Replacement .......................... 16-4
Machine Gun Ring Roof Support
Replacement ................................................. 21-6

S

Scope, Introduction................................................ 1-1
Seat
Machine Gun Ring Center Seat
Replacement ................................................. 21-5
Seat Belt Replacement .......................................16-15
Seats Replacement/Repair..................................16-14
Secondary and Primary Air Tanks
Replacement ................................................11-20
Self-Recovery
Introduction, 11K Self-Recovery Winch
(SRW) Maintenance....................................... 17-1
11K Self-Recovery Winch (SRW)....................... 1-17
11K Self-Recovery Winch (SRW) Cable
Replacement ................................................. 17-5
11K Self-Recovery Winch (SRW) Cable
Pulleys Replacement ..................................... 17-4
11K Self-Recovery Winch (SRW) Does
Not Pay Out .................................................. 2-16
11K Self-Recovery Winch (SRW) Does
Not Reel In.................................................... 2-16

TM 9-2320-365-20-1

INDEX-28
Change 2

SUBJECT INDEX (CONT)

Subject
Para

S (Cont)

Self-Recovery (Cont)
11K Self-Recovery Winch (SRW) Does
Not Reel In or Pay Out ................................... 2-16
11K Self-Recovery Winch (SRW) Does
Not Work ...................................................... 2-28
11K Self-Recovery Winch (SRW) Front
Roller Fairlead Replacement ........................... 17-2
11K Self-Recovery Winch (SRW) Hoses
Replacement ................................................. 17-7
11k Self-Recovery Winch (SRW) Rear
Roller Fairlead Replacement ........................... 17-3
11K Self-Recovery Winch (SRW) System
Troubleshooting ............................................. 2-28
Sensor
Coolant Temperature Gage Sensor
Replacement ................................................. 7-37
Ether Sensor Replacement ............................... 7-39
Transmission Engine Speed Sensor
Replacement ................................................. 7-43
Throttle Position Sensor (TPS) Cable
Assembly Replacement.................................. 4-16
Service
Before Operation................................................ 2-6
Gladhand Two-Way Check Valve
Replacement ................................................11-23
Shaft
Drive Shaft and Universal Joint
Replacement ................................................... 9-2
Drive Shaft or Universal Joint
Unusually Noisy When Operating.................... 2-18
Rear Axle Shaft Replacement............................ 10-4
Propeller Shaft Troubleshooting ......................... 2-18
Shelter
M1078/M1081 S-280 Shelter Tiedown
Kit Installation/Removal .................................20-84
Shield
Muffler and Exhaust Heat Shields
Replacement ................................................... 5-2
M1079 Blackout Shield and Frame
Replacement/Repair......................................16-37
Shift
Transmission Does Not Shift or Is Slow
to Shift When Cold......................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) and Bracket
Replacement and Calibration............................. 8-2

Subject
Para

S (Cont)

Shift (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Emits Eight
Seconds of Beeps and/or
Transmission Does Not Shift Gears............. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 14................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 15................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 16................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 24 and/or 33 and Any Sub Code............ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 32 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays
Main Code 41, 42, 44, 45, 66, and/or
69 and Any Sub Code................................ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 43 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 52 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 57 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 21 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 51 Sub Code 10, 12, 21, 43,
45, or 65................................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 25 and Any Sub Code.......................... 2-17

TM 9-2320-365-20-1

Change 2
INDEX-29

Subject
Para

S (Cont)

Shift (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 53 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 54 Sub Code 01, 07, 10, 12, 17,
21, 23, 27, 32, 34, 43, 45, 54,
56, 65, 70, 71, 72, 80, 81, 82,
83, 85, 86, 92, 93, 95, 96,
or 97.................................................. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 55 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 56 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 13 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 23 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Does Not
Illuminate..................................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 14................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 15................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 16................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 24
and/or 33 and Any Sub Code......................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 32
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 42,
44, 45, 46, 66, and/or 69 and Any
Sub Code.................................................. 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 52
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 57
and Any Sub Code....................................... 2-17

Subject
Para

S (Cont)

Shift (Cont)
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 21
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 51
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 25
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 53
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 54
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 55
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 56
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 13
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Indicator Displays
"--" and/or Transmission Does
Not Shift Gears.......................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 23
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Does Not Illuminate ............... 2-17
Shimmies
Wanders, Pulls to One Side, or
Shimmies...................................................... 2-26
Wanders, Pulls to One Side, or
Shimmies...................................................... 2-27
Shipment
Preparation for Storage or Shipment................... 2-44
Preparation for Storage or Shipment
Introduction ................................................... 2-43
Shock
Front Axle Shock Absorber
Replacement ................................................. 15-3
Rear Axle Shock Absorber
Replacement ................................................. 15-4
Shoes
Front Brake Shoes Replacement/
Adjustment.................................................... 11-2

TM 9-2320-365-20-1

INDEX-30
Change 2

SUBJECT INDEX (CONT)

Subject
Para

S (Cont)

Shoes (Cont)
Rear Brake Shoes Replacement/
Adjustment.................................................... 11-3
Shrouds
Radiator Fan Shrouds Replacement..................... 6-4
Shunt
Replacement ................................................... 7-26
Starter to Shunt 24 VDC Cable
Replacement ................................................. 7-84
Shuttle Valve Replacement................................... 23-5
Side and/or Rear Marker Lights Do Not
Illuminate......................................................... 2-16
Slides
M1081 Parachute Suspension
Slides Replacement ....................................... 14-3
Sling
M1079 Sling Bearing Angle
Replacement ................................................16-26
M1079 Sling Spreader and Guides
Replacement ................................................16-24
Small Arms Mount Replacement........................... 21-7
Spare
Tire Retainer Replacement/Repair...................... 14-4
Tire Retainer Does Not Lower............................ 2-32
Tire Retainer Does Not Raise............................ 2-32
Special
Introduction, Special Purpose Kits
Maintenance.................................................. 20-1
Purpose Kit Troubleshooting.............................. 2-31
Tools, TMDE, and Support Equipment.................. 2-2
Speed
Engine Speed Sensor Replacement/
Adjustment.................................................... 7-38
Speedometer
Does Not Illuminate.......................................... 2-16
Does Not Operate or Is
Inaccurate..................................................... 2-16
Spider
Differential Spider Assembly
Replacement ................................................. 10-3
Spindle Replacement........................................... 10-5
Spreader
M1079 Lower Spreader Bar
Replacement ................................................16-21
M1079 Sling Spreader and Guides
Replacement ................................................16-24
Spring
Air Spring and Bracket Replacement.................. 16-9
Rear Spring Brake Caging................................. 11-6

S (Cont)

SRW
Introduction, 11K Self-Recovery Winch
(SRW) Maintenance....................................... 17-1
11K Self-Recovery Winch (SRW)....................... 1-17
11K Self-Recovery Winch (SRW) Cable
Replacement ................................................. 17-5
11K Self-Recovery Winch (SRW) Does
Not Pay Out .................................................. 2-16
11K Self-Recovery Winch (SRW) Does
Not Reel In.................................................... 2-16
11K Self-Recovery Winch (SRW) Does
Not Reel In or Pay Out ................................... 2-16
11K Self-Recovery Winch (SRW) Does
Not Work ...................................................... 2-28
11K Self-Recovery Winch (SRW) Front
Roller Fairlead Replacement ........................... 17-2
11K Self-Recovery Winch (SRW) Hoses
Replacement ................................................. 17-7
11K Self-Recovery Winch (SRW)
Maintenance.................................................. 17-1
11K Self-Recovery Winch (SRW) Cable
Pulleys Replacement ..................................... 17-4
11K Self-Recovery Winch (SRW) Rear
Roller Fairlead Replacement ........................... 17-3
11K Self-Recovery Winch (SRW) System
Troubleshooting ............................................. 2-28
Stabilizer
Rear Stabilizer Bar Replacement/Repair............. 15-5
Stalls
Engine Stalls at Low RPM ................................ 2-12
Start
and Charging Cable Assembly
Replacement ................................................. 7-82
Engine Overspeeds on Start.............................. 2-12
Ether Start Does Not Operate............................ 2-16
Ether Start Switch Does Not Illuminate............... 2-16
Hazard Lights Switch Does Not
Illuminate ...................................................... 2-16
Inhibit Pushbutton Does Not Operate ................. 2-16
Inhibit Pushbutton Switch
Replacement ................................................. 7-19
Starter
Auxiliary Starter Solenoid Replacement................ 7-6
Battery to Starter Cable Assembly
Replacement ................................................. 7-70
Pushbutton Switch Replacement ....................... 7-20
to Chassis Ground Cable Replacement .............. 7-83
to Shunt 24 VDC Cable Replacement................. 7-84

TM 9-2320-365-20-1

Change 2
INDEX-31

Subject
Para

S (Cont)

Starting
Ether Starting Aid Does Not Operate.................. 2-13
Ether Starting Aid Replacement......................... 4-15
Motor Replacement ............................................ 7-7
STE/ICE-R Cable Assembly Replacement ............. 7-58
Steering
Column Replacement ....................................... 13-6
Excessive Play When Turning Steering
Wheel........................................................... 2-26
Hard or Does Not Work..................................... 2-29
Hydraulic System Troubleshooting..................... 2-29
Introduction, Steering System
Maintenance.................................................. 13-1
No Response When Turning Steering
Wheel........................................................... 2-26
Power Steering Hoses and Tube
Replacement ................................................. 13-7
Power Steering Pump Replacement................... 13-9
Power Steering Pump Reservoir and
Bracket Replacement ..................................... 13-8
System ........................................................... 1-16
Troubleshooting................................................ 2-26
Wheel Replacement ......................................... 13-2
Step
Cab Step Replacement....................................16-11
M1079 Folding Step Replacement ....................16-28
Stop
Master Stop Indicator Does Not
Operate......................................................... 2-16
Trailer Left Stop/Turn Light Does
Not Illuminate ................................................ 2-16
Trailer Right Stop/Turn Light Does
Not Illuminate ................................................ 2-16
Stoplights
and Blackout Stoplights Do Not
Operate......................................................... 2-16
Intervehicle Stoplights Do Not
Illuminate ...................................................... 2-16
One or Both Blackout Stoplights Do
Not Illuminate ................................................ 2-16
One or Both Stoplights Do Not
Illuminate ...................................................... 2-16
Stoplight Switch Replacement .............................11-25
Storage
Cab Storage Box Replacement/Repair ..............16-17
Preparation for Storage or Shipment................... 2-44
Preparation for Storage or Shipment
Introduction ................................................... 2-43
Storage Maintenance Procedures ......................... 2-45
Stowage
Panel Stowage Door Assembly Repair..............16-18

Subject
Para

S (Cont)

Stud
Wheel Stud Replacement ................................. 12-3
Wheel Stud Tightening Sequence...................... 12-4
Sub-Frame
M1079 Upper Sub-Frame
Replacement ................................................16-20
Suspension
Introduction, Suspension System
Maintenance.................................................. 15-1
M1081 Parachute Suspension
Slides Replacement ....................................... 14-3
System Troubleshooting ................................... 2-27
Will Not Compress or Return to Normal.............. 2-30
Swing
Light Material Handling Crane (LMHC)
Mast and Swing Assembly Repair ..................20-78
Switch
Amber Warning Light Switch Does
Not Illuminate ................................................ 2-16
Dimmer Switch Replacement ............................ 7-12
Heater Fan Control Switch
Replacement ................................................18-10
Lamp Test Switch Does Not Illuminate............... 2-16
Main Light Switch Replacement......................... 7-17
Master Power Switch Does Not
Illuminate ...................................................... 2-16
Master Power Switch Does Not Shut
Down Engine ................................................... 2-16
M1079 Blackout Override Switch
Replacement ................................................16-56
M1079 Blackout Switch Replacement ...............16-57
M1079 Door Ajar Switch and Conduit
Replacement ................................................16-55
M1079 Fan Switch/Box and Conduit
Replacement ................................................16-54
M1079 Interior Lights Switch/Box and
Conduit Replacement ....................................16-50
Oil Pressure Switch Replacement...................... 7-40
Pressure Switch Replacement........................... 23-8
Radiator Fan Off Switch Does
Not Illuminate ................................................ 2-16
Start Inhibit Pushbutton Switch
Replacement ................................................. 7-19
Starter Pushbutton Switch
Replacement ................................................. 7-20
Stoplight Switch Replacement ..........................11-25
Troop Transport Alarm Switch, Connector,
and Bracket Replacement..............................20-80
Turn Signal Switch Replacement ....................... 7-25
Water Temperature Switch
Replacement ................................................. 7-42

TM 9-2320-365-20-1

INDEX-32
Change 2

SUBJECT INDEX (CONT)

Subject
Para

S (Cont)

Switches
Rocker Switches Replacement.......................... 7-18
System
11K Self-Recovery Winch (SRW) System
Troubleshooting ............................................. 2-28
Air System ...................................................... 1-19
Air System Loses Pressure During
Operation/Slow, No, or Incorrect
Air Pressure Buildup..................................... 2-21
Air System Troubleshooting .............................. 2-21
Brake System.................................................. 1-15
Brake System Loses Air When Brakes
Are Applied ................................................... 2-20
Brake System Troubleshooting.......................... 2-20
Cooling System ............................................... 1-13
Cooling System Troubleshooting........................ 2-15
Electrical System............................................. 1-14
Electrical System Does Not Maintain A
Charge.......................................................... 2-16
Electrical System Troubleshooting..................... 2-16
Engine System Troubleshooting ........................ 2-12
Exhaust System Troubleshooting ...................... 2-14
Exhaust System Unusually Noisy or
Vibrates Excessively During Engine
Operation...................................................... 2-14
Fuel System.................................................... 1-12
Fuel System Bleeding ...................................... 4-11
Fuel System Troubleshooting ............................ 2-13
Hydraulic System Troubleshooting..................... 2-23
Introduction, Air System Maintenance................ 23-1
Introduction, Brake System
Maintenance.................................................. 11-1
Introduction, Cooling System
Maintenance.................................................... 6-1
Introduction, Electrical System
Maintenance.................................................... 7-1
Introduction, Exhaust System
Maintenance.................................................... 5-1
Introduction, Fuel System Maintenance................ 4-1
Introduction, Hydraulic System
Maintenance.................................................. 19-1
Introduction, Steering System
Maintenance.................................................. 13-1
Introduction, Suspension System
Maintenance.................................................. 15-1
Oil In Cooling System....................................... 2-15

Subject
Para

S (Cont)

System (Cont)
Park and Trailer Air Supply Valves
Replacement ................................................11-18
Steering Hydraulic System
Troubleshooting ............................................. 2-29
Steering System .............................................. 1-16
Suspension System Troubleshooting ................. 2-27
Transmission System Troubleshooting ............... 2-17

T

Tachometer
Does Not Illuminate.......................................... 2-16
Does Not Operate or Is Inaccurate..................... 2-16
Replacement ................................................... 7-21
Taillight
Composite Taillight Assembly
Replacement/Repair....................................... 7-32
Trailer Marker/Taillights Do Not
Illuminate ...................................................... 2-16
Taillights
Intervehicle Taillights Do Not Illuminate............... 2-16
Tailpipe Replacement............................................. 5-4
Tank
Fuel Tank and Brackets Replacement.................. 4-8
Radiator Overflow Tank and
Bracket Replacement/Repair............................. 6-3
Wet Tank Replacement .................................... 23-7
Tanks
Secondary and Primary Air Tanks
Replacement ................................................11-20
Tapping
M1079 Tapping Plate Replacement...................16-42
M1079 Van Body Floor Tapping Plate
Initial Installation (Serial Numbers 001
through 190).................................................16-43
Temperature
Coolant Temperature Gage Sensor
Replacement ................................................. 7-37
Coolant Temperature Light Switch
Replacement ................................................. 7-22
High Engine Temperature Indicator
Illuminates..................................................... 2-16
Terminal Block
Battery to 200 Amp Terminal Block
12 VDC Cable Assembly
Replacement ................................................20-63

TM 9-2320-365-20-1

Change 2
INDEX-33

Subject
Para

T (Cont)

Terminal Block (Cont)
Battery to 200 Amp Terminal Block
24 VDC Cable Assembly
Replacement ................................................20-64
200 Amp Alternator to Terminal Block
12 VDC Cable Replacement...........................20-59
200 Amp Alternator to Terminal Block
24 VDC Cable Replacement...........................20-61
200 Amp Terminal Block Replacement..............20-69
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Battery Cable
Replacement ................................................20-66
200 Amp Terminal Block to Reverse
Polarity Relay 12 VDC Load Cable
Replacement ................................................20-60
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Battery Cable
Replacement ................................................20-67
200 Amp Terminal Block to Reverse
Polarity Relay 24 VDC Load Cable
Replacement ................................................20-62
200 Amp Terminal Block to Power
Distribution Panel (PDP) 12 VDC Cable
Replacement ................................................20-65
200 Amp Terminal Block to Power
Distribution Panel (PDP) 24 VDC Cable
Replacement ................................................20-68
Test
Lamp Test Switch Does Not Illuminate............... 2-16
Tester
Battery Tester Does Not Operate....................... 2-16
Battery Tester Replacement.............................. 7-45
Thermostat
Housing Replacement......................................... 6-6
M1079 Heater Thermostat Connector
Replacement ................................................16-48
Replacement ..................................................... 6-5
Throttle
Checking and Stenciling High/Low Hand
Throttle Positions ........................................... 4-22
Hand Throttle Lever Replacement/
Adjustment.................................................... 4-17
Control Cable Replacement/
Adjustment.................................................... 4-18
Control Lever Replacement................................ 4-20
Control Threaded Rod Replacement ................... 4-19
Position Sensor (TPS) Cable Assembly
Replacement ................................................. 4-16
Tiedown
M1078/M1081 S-280 Shelter Tiedown
Kit Installation/Removal .................................20-84
Tie-Rod Replacement/Repair
13-4

Subject
Para

T (Cont)

Tilt
Cab Tilt and Spare Tire Retainer
Troubleshooting ............................................. 2-32
Cab Tilt, Spare Tire Retainer, and
Suspension Compression Will Not
Work ............................................................ 2-30
Tire
Central Tire Inflation System (CTIS)
Cable Assembly Replacement ........................ 7-53
Central Tire Inflation System (CTIS)
Does Not Operate.......................................... 2-16
Central Tire Inflation System (CTIS)
ECU Replacement ......................................... 12-6
Central Tire Inflation System (CTIS)
Hose Assemblies, Manifold Valve,
Kneeling Valve and Bracket
Replacement ................................................. 12-5
Central Tire Inflation System (CTIS)
Troubleshooting ............................................. 2-24
Front Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-8
Primary and Central Tire Inflation
System (CTIS) Air Hoses
Replacement ................................................. 23-2
Rear Axle Central Tire Inflation
System (CTIS) Quick Release Valve
Replacement ................................................. 12-9
Spare Tire Retainer Replacement/
Repair........................................................... 14-5
Spare Tire Retainer Does Not Lower................... 2-32
Spare Tire Retainer Does Not Raise................... 2-32
Wheel Bearing/Central Tire Inflation
System (CTIS) Seal Replacement ................... 10-2
Tires
CTIS Does Not Deflate Tires.............................. 2-16
CTIS Does Not Inflate Tires ............................... 2-16
Introduction, Wheels, Tires, and Hubs
Maintenance.................................................. 12-1
Wear Unevenly or Excessively........................... 2-22
Too Much Engine Vibration................................... 2-12
Tool Box Replacement/Repair..............................16-16
Trailer
Left Stop/Turn Light Does Not
Illuminate ...................................................... 2-16
Marker/Taillights Do Not Illuminate..................... 2-16
Right Stop/Turn Light Does Not
Illuminate ...................................................... 2-16

TM 9-2320-365-20-1

INDEX-34
Change 2

SUBJECT INDEX (CONT)

Subject
Para

T (Cont)

Transmission
Does Not Shift or Is Slow to Shift When
Cold.............................................................. 2-17
Engine and Transmission Oil Sampling
Valves Replacement......................................... 3-6
Engine Speed Sensor Replacement................... 7-43
Introduction, Transmission Maintenance............... 8-1
Metal Particles Found During Transmission
Oil Change.................................................... 2-17
Oil Cooler Hoses Initial Installation..................... 8-14
Oil Cooler Hoses Replacement.......................... 8-15
Oil Cooler Hose Bracket Replacement ............... 8-16
Oil Cooler Replacement .................................... 8-10
Oil Cooler Tubes Replacement .......................... 8-11
Oil Filter Replacement ........................................ 8-9
Scavenge Pump Hose Replacement .................. 8-12
System Troubleshooting ................................... 2-17
Temperature Indicator Does Not
Operate......................................................... 2-16
Unusually Noisy When Operating ...................... 2-17
WTEC II Cab Transmission Harness
Replacement ................................................. 7-86
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) and Bracket
Replacement and Calibration............................. 8-2
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Dimmer Module
Replacement ................................................. 7-13
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Emits Eight
Seconds of Beeps and/or
Transmission Does Not Shift Gears............. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 14................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 15................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 22 Sub Code 16................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 24 and/or 33 and
Any Sub Code........................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 32 and Any Sub Code.......................... 2-17

Subject
Para

T (Cont)

Transmission (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays
Main Code 41, 42, 44, 45, 66, and/or
69 and Any Sub Code................................ 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 43 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 52 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 57 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 21 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 51 Sub Code 10, 12, 21, 43,
45, or 65................................................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 25 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 53 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 54 Sub Code 01, 07, 10, 12, 17,
21, 23, 27, 32, 34, 43, 45, 54,
56, 65, 70, 71, 72, 80, 81, 82,
83, 85, 86, 92, 93, 95, 96,
or 97.................................................. 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 55 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 56 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 13 and Any Sub Code.......................... 2-17
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Displays Main
Code 23 and Any Sub Code.......................... 2-17

TM 9-2320-365-20-1

Change 2
INDEX-35

Subject
Para

T (Cont)

Transmission (Cont)
WTEC II Transmission ECU Pushbutton
Shift Selector (TEPSS) Does Not
Illuminate..................................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 14................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 15................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 22
Sub Code 16................................................ 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 24
and/or 33 and Any Sub Code......................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 32
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 42,
44, 45, 46, 66, and/or 69 and Any
Sub Code.................................................. 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 52
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 57
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 21
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 51
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 25
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 53
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 54
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 55
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 56
and Any Sub Code....................................... 2-17

Subject
Para

T (Cont)

Transmission (Cont)
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 13
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Indicator Displays
"--" and/or Transmission Does
Not Shift Gears.......................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Displays Main Code 23
and Any Sub Code....................................... 2-17
WTEC III Transmission Pushbutton Shift
Selector (TPSS) Does Not Illuminate ............... 2-17
Transmitter
Low Pressure Transmitter Replacement ............. 7-88
Oil Pressure Transmitter Replacement ............... 7-41
Transport/Transportability
Air Transport Troubleshooting............................ 2-30
Air Transportability Air Hoses
Replacement ................................................. 23-3
Air Transportability Hydraulic Hose
Replacement ................................................19-11
Air Transportability Hydraulic System................. 1-18
Air Transportability Hydraulic System
Service.......................................................... 19-7
M1079 Van Preparation for Air
Transport......................................................16-73
Troop Transport Alarm Cable
Assembly Replacement.................................20-79
Troop Transport Alarm Does Not
Operate......................................................... 2-31
Troop Transport Audible Alarm
Does Not Operate.......................................... 2-16
Troop Transport Alarm Switch,
Connector, and Bracket Replacement.............. 2-80
Troop Transport Audible Alarm Does
Not Operate..................................................... 2-16
Troubleshooting
Axle Troubleshooting........................................ 2-25
Electrical System Troubleshooting..................... 2-16
Engine System Troubleshooting ........................ 2-12
Exhaust System Troubleshooting ...................... 2-14
Fuel System Troubleshooting ............................ 2-13
Hydraulic System Troubleshooting..................... 2-23
Introduction to Logic Tree
Troubleshooting ............................................. 2-10
Power Take Off (PTO) Troubleshooting............... 2-19
Special Purpose Kit Troubleshooting.................. 2-31
Steering Hydraulic System
Troubleshooting ............................................. 2-29
Steering Troubleshooting................................... 2-26
Suspension System Troubleshooting ................. 2-27

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

T (Cont)

Troubleshooting (Cont)
Transmission System Troubleshooting
. . . . . 2-17
Wheel Troubleshooting . . . . . . . . . . . . . . . . . 2-22
11K Self-Recovery Winch (SRW) System
Troubleshooting . . . . . . . . . . . . . . . . . . . . . 2-28
Tube
Coolant Bypass Tube Replacement
. . . . . . . . 6-7
Engine Oil Fill Tube Replacement . . . . . . . . . . 3-7
Fuel Ratio Control Tube Replacement . . . . . . . 4-6
Intake Air Cleaner Filter Element, Air
Cleaner Assembly, and Particle Extraction
Tube Replacement
. . . . . . . . . . . . . . . . . . . 4-2
Orifice Tube Assembly Replacement . . . . . . . . 4-7
Power Steering Hoses and Tube
Replacement . . . . . . . . . . . . . . . . . . . . . . . 13-7
Transmission Oil Fill Tube
Replacement . . . . . . . . . . . . . . . . . . . . . . . 8-13
Turbocharger to Charge Air Cooler Tube
and Hoses Replacement
. . . . . . . . . . . . . . . 4-4
Upper Coolant Tube and Hoses
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Tubes
Air Compressor Inlet and Outlet Coolant
Tubes Replacement . . . . . . . . . . . . . . . . . . 6-11
Charge Air Cooler to Air Inlet Elbow
Tubes and Hoses Replacement . . . . . . . . . . 4-5
Fuel Filter Tubes Replacement . . . . . . . . . . . 4-10
M1079 Heater Fuel Tubes/Hoses
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-46
Transmission Oil Cooler Tubes
Replacement . . . . . . . . . . . . . . . . . . . . . . . 8-11
Turn
Intervehicle Left Turn Signal Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Intervehicle Right Turn Signal Does Not
Illuminate
. . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Front and Rear Turn Signals Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Left or Right Front Turn Signals Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Left Turn Signal Indicator Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Right Turn Signal Indicator Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Signal Indicators and High Beams on
Indicator Do Not Operate . . . . . . . . . . . . . . 2-16

T (Cont)

Turn (Cont)
Signal Switch Replacement
. . . . . . . . . . . . . 7-25
Trailer Left Stop/Turn Light Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
Trailer Right Stop/Turn Light Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
Turret
Light Material Handling Crane (LMHC)
Turret Replacement . . . . . . . . . . . . . . . . . 20-76
Two
Steady Mode Lights Illuminate on Central
Tire Inflation System (CTIS) ECU . . . . . . . . 2-24
Way Check Valve Replacement . . . . . . . . . 11-14

U

Universal
Drive Shaft or Universal Joint
Unusually Noisy When Operating . . . . . . . . 2-18
Universal Joint
Drive Shaft and Universal Joint
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Unpacking and Deprocessing
. . . . . . . . . . . . . . 2-4
Upper
Coolant Tube and Hoses Replacement . . . . . . 6-9
M1079 Upper Sub-Frame
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-20

V

Valve
Cab Leveling Valve and Linkage
Replacement/Adjustment . . . . . . . . . . . . . . 16-8
Cover and Gasket Replacement . . . . . . . . . . . 3-3
Emergency Gladhand Two-Way Check
Valve Replacement . . . . . . . . . . . . . . . . . 11-24
Front Axle Central Tire Inflation System
(CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-8
Front Axle Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-15
Front Gladhand One-Way Check Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-26
Fuel Pressure Regulating Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 4-3

INDEX-36
Change 1

TM 9-2320-365-20-1

Subject
Para
Subject
Para

V (Cont)

Valve (Cont)
Rear Axle Central Tire Inflation System
(CTIS) Quick Release Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . 12-9
Inversion Valve Replacement . . . . . . . . . . . 11-12
Inversion Valve Replacement . . . . . . . . . . . . 23-4
Load Sensing Valve and Control Cable
Replacement/Adjustment . . . . . . . . . . . . . 11-10
Low Pressure Transmitter Two-Way
Check Valve Replacement . . . . . . . . . . . . 11-28
Manifold Valve Assembly Replacement . . . . . 12-7
Park Control Two-Way Check Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-17
Pressure Protection Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-27
Relay Valve Replacement
. . . . . . . . . . . . . 11-13
Service Gladhand Two-Way Check Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . 11-23
Shuttle Valve Replacement . . . . . . . . . . . . . . 23-5
Two-Way Check Valve Replacement . . . . . . 11-14
Winch Control Valve Assembly and
Bracket Replacement . . . . . . . . . . . . . . . . . 17-6
Winch Control Valve Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-85
Valves
System Park and Trailer Air Supply
Valves Replacement
. . . . . . . . . . . . . . . . 11-18
Van
All M1079 Van Body Marker Lights Do
Not Operate
. . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Van Body Floor Tapping Plate
Initial Installation (Serial Numbers 001
through 190) . . . . . . . . . . . . . . . . . . . . . . 16-43
M1079 Van Body Interior Accessory
Mounting Locations . . . . . . . . . . . . . . . . . 16-44
M1079 Van Body Clearance Marker Light
Does Not Illuminate . . . . . . . . . . . . . . . . . . 2-16
M1079 Van Body Replacement . . . . . . . . . . 16-19
M1079 Van Door Open Light Does Not
Illuminate and Audible Alarm Does Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
M1079 Van Preparation for Air
Transport
. . . . . . . . . . . . . . . . . . . . . . . . 16-73
Vehicle
Brakes Unevenly, Brakes Pull to One Side
or Grab . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
WTEC II Vehicle Interface Module (VIM)
Replacement/Repair
. . . . . . . . . . . . . . . . . . 8-6
Vent
M1079 Vent Cover Replacement
. . . . . . . . 16-32

V (Cont)

Voltage Regulator
100 Amp Voltage Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 7-5
200 Amp Voltage Regulator
Replacement . . . . . . . . . . . . . . . . . . . . . . 20-57
VOLTS
Gage Does Not Illuminate
. . . . . . . . . . . . . . 2-16
Gage Does Not Operate or Is
Inaccurate . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

W

Wanders
Pulls to One Side, or Shimmies
. . . . . . . . . . 2-26
Pulls to One Side, or Shimmies
. . . . . . . . . . 2-27
Warning
Amber Warning Light Assembly
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-83
Amber Warning Light Switch Does
Not Illuminate
. . . . . . . . . . . . . . . . . . . . . . 2-16
Light Cable Assembly Replacement
. . . . . . . 22-2
Light Does Not Illuminate . . . . . . . . . . . . . . . 2-16
No Overspeed Warning Light and/or
Overspeed Pressure Change . . . . . . . . . . . 2-24
Warranty Information . . . . . . . . . . . . . . . . . . . . . 1-6
Washer
Windshield Washer Does Not Operate
. . . . . 2-16
Windshield Washer Does Not Operate
on Low Speed . . . . . . . . . . . . . . . . . . . . . . 2-16
Windshield Washer Hoses and Connector
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-6
Windshield Washer Pump
Electromagnetic Interference (EMI)
Cable Replacement . . . . . . . . . . . . . . . . . . 7-60
Windshield Washer Reservoir and Pump
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-2
Water
Fuel/Water Separator and Filter
Replacement . . . . . . . . . . . . . . . . . . . . . . . 4-13
Pump and Fittings Replacement . . . . . . . . . . 6-12
TEMP Gage Does Not Illuminate
. . . . . . . . . 2-16
TEMP Gage Does Not Operate or
Is Inaccurate . . . . . . . . . . . . . . . . . . . . . . . 2-16
Temperature Switch Replacement . . . . . . . . . 7-42
Wet Tank Replacement . . . . . . . . . . . . . . . . . . 23-7
Wheel
Bearing/Central Tire Inflation System
(CTIS) Seal Replacement . . . . . . . . . . . . . . 10-2
Front Wheel Toe-In Alignment/
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 13-5
No Response When Turning Steering
Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Change 1
INDEX-37

TM 9-2320-365-20-1

SUBJECT INDEX (CONT)

Subject
Para
Subject
Para

W (Cont)

Wheel (Cont)
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2
Steering Wheel Replacement . . . . . . . . . . . . 13-2
Stud Replacement . . . . . . . . . . . . . . . . . . . . 12-3
Stud Tightening Sequence . . . . . . . . . . . . . . 12-4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 2-22
Wheels
Introduction, Wheels, Tires, and Hubs
Maintenance . . . . . . . . . . . . . . . . . . . . . . . 12-1
Wobbles or Shimmies
. . . . . . . . . . . . . . . . . 2-22
White Exhaust Smoke . . . . . . . . . . . . . . . . . . . 2-12
Winch
Control Valve Assembly and Bracket
Replacement . . . . . . . . . . . . . . . . . . . . . . . 17-6
Control Valve Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-85
Light Material Handling Crane (LMHC)
Winch Replacement/Repair
. . . . . . . . . . . 20-73
11K Self-Recovery Winch (SRW) . . . . . . . . . 1-17
11K Self-Recovery Winch (SRW) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 17-5
11K Self-Recovery Winch (SRW) Does
Not Pay Out . . . . . . . . . . . . . . . . . . . . . . . 2-16
11K Self-Recovery Winch (SRW) Does
Not Reel In . . . . . . . . . . . . . . . . . . . . . . . . 2-16
11K Self-Recovery Winch (SRW) Does
Not Reel In or Pay Out
. . . . . . . . . . . . . . . 2-16
11K Self-Recovery Winch (SRW) Does
Not Work
. . . . . . . . . . . . . . . . . . . . . . . . . 2-28
11K Self-Recovery Winch (SRW) Front
Roller Fairlead Replacement
. . . . . . . . . . . 17-2
11K Self-Recovery Winch (SRW) Hoses
Replacement . . . . . . . . . . . . . . . . . . . . . . . 17-7
11K Self-Recovery Winch (SRW) Cable
Pulleys Replacement . . . . . . . . . . . . . . . . . 17-4
11K Self-Recovery Winch (SRW) Rear
Roller Fairlead Replacement
. . . . . . . . . . . 17-3
11K Self-Recovery Winch (SRW) System
Troubleshooting . . . . . . . . . . . . . . . . . . . . . 2-28
Window
M1079 Window Latch and Prop
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-38
M1079 Window Main Frame
Replacement . . . . . . . . . . . . . . . . . . . . . . 16-40
M1079 Window Sash Assembly
Replacement/Repair
. . . . . . . . . . . . . . . . 16-39
M1079 Window Cover Replacement . . . . . . 16-41

W (Cont)

Windshield
All Windshield Wiper Speeds Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Washer Does Not Operate . . . . . . . . . . . . . . 2-16
Washer Does Not Operate on Low
Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Washer Hoses and Connector
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-6
Washer Pump Electromagnetic
Interference (EMI) Cable Assembly
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-60
Washer Reservoir and Pump
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-2
Wiper and Nozzle Replacement . . . . . . . . . . 18-3
Wiper Does Not Operate on High
Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Wiper Does Not Operate on Intermittent
Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Wiper ECU Replacement . . . . . . . . . . . . . . . 7-62
Wiper Electromagnetic Interference
(EMI) Cable Replacement
. . . . . . . . . . . . . 7-61
Wiper Linkage Replacement . . . . . . . . . . . . . 18-5
Wiper Motor Replacement
. . . . . . . . . . . . . . 18-4
Wiper Speed Does Not Operate On
Low Speed . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Wiper
All Windshield Wiper Speeds Do Not
Operate
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Windshield Wiper and Nozzle
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-3
Windshield Wiper Does Not Operate
on High Speed
. . . . . . . . . . . . . . . . . . . . . 2-16
Windshield Wiper Does Not Operate
on Intermittent Speed . . . . . . . . . . . . . . . . . 2-16
Windshield Wiper Does Not Operate
on Low Speed . . . . . . . . . . . . . . . . . . . . . . 2-16
Windshield Wiper ECU Replacement
. . . . . . 7-62
Windshield Wiper Electromagnetic
Interference (EMI) Cable
Replacement . . . . . . . . . . . . . . . . . . . . . . . 7-61
Windshield Wiper Linkage
Replacement . . . . . . . . . . . . . . . . . . . . . . . 18-5
Windshield Wiper Motor Replacement . . . . . . 18-4
Wire
Light Material Handling Crane (LMHC)
Weight Block and Wire Rope
Replacement/Repair
. . . . . . . . . . . . . . . . 20-72

INDEX-38
Change 1
All data on page INDEX-39, including pages
INDEX-39 and INDEX-40 Blank, deleted

TM 9-2320-365-20-1

GLOSSARY
ABBREVIATIONS

A/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Conditioner

Glossary-1

ANSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . American National Standards Institute

CCW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Counterclockwise

CTIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Central Tire Inflation System

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise

ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Control Unit

EMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electromagnetic Interference

LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light Emitting Diode

LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Left Hand

LMHC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light Material Handling Crane

MAC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance Allocation Chart

NATO
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . North Atlantic Treaty Organization

NBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nuclear, Biological, or Chemical

NO/NC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normally Open/Normally Closed

PDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Panel

PMCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventive Maintenance Checks and Services

PTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Takeoff

RH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Right Hand

SAE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Society of Automotive Engineers

SRW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Self-Recovery Winch

STE/ICE-R . . . . . . . . . . . . . . . . . . . . . . . Simplified Test Equipment/Internal Combustion Engine-Reprogrammable

TEPSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission ECU Pushbutton Shift Selector

TPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Throttle Position Sensor

VDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Volts Direct Current

VIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle Interface Module

TM 9-2320-365-20-1

Glossary-2

WTEC II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . World Transmission Electronic Controls (version 2)

WTEC III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
World Transmission Electronic Controls (version 3)

By Order of the Secretary of the Army:

Official:

DENNIS J. REIMER
General, United States Army
Chief of Staff

JOEL B. HUDSON
Administrative Assistant to the
Secretary of the Army
05140

DISTRIBUTION: To be distributed in accordance with the initial distribution
number (IDN) 380934 requirements for TM 9-2320-365-20-1.

*U.S. GOVERNMENT PRINTlNG 0FFICE:1999-746-025/80087

RECOMMENDED CHANGES TO PUBLICATIONS AND
BLANK FORMS
For use of this form, see AR 25-30; the proponent agency is OAASA

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

TYPED NAME, GRADE OR TITLE

PUBLICATION/FORM NUMBER

DATE
Use Part II (reverse) for Repair Parts and
Special Tool Lists (RPSTL) and Supply
Catalogs/Supply Manuals (SC/SM).

FROM: (Activity and location) (Include ZIP Code)
TO:

REPLACES DA FORM 2028, 1 DEC 68, WHICH WILL BE USED.

PARA-
GRAPH

(Forward to proponent of publication or form) (Include ZIP Code)

PART I - ALL PUBLICATIONS (EXCEPT RPSTL AND SC/SM) AND BLANK FORMS

DATE
TITLE

PAGE
ITEM
LINE
FIGURE
NO.

TABLE
RECOMMENDED CHANGES AND REASON

* Reference to line numbers within the paragraph or subparagraph.

SIGNATURE

DA FORM 2028, FEB 74
USAPA V3.01

TO: (Forward direct to addressee listed in publication)

TYPED NAME, GRADE OR TITLE

PART III - REMARKS (Any general remarks or recommendations, or suggestions for improvement of publications and
blank forms. Additional blank sheets may be used if more space is needed.)

TITLE

FROM: (Activity and location) (Include ZIP Code)

PAGE
NO.

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

PUBLICATION NUMBER

COLM
NO.

LINE
NO.

NATIONAL STOCK
NUMBER

REFERENCE
NO.

FIGURE
NO.

ITEM
NO.

DATE

TOTAL NO.
OF MAJOR
ITEMS
SUPPORTED

RECOMMENDED ACTION

PART II - REPAIR PARTS AND SPECIAL TOOL LISTS AND SUPPLY CATALOGS/SUPPLY MANUALS

DATE

SIGNATURE

USAPA V3.01

RECOMMENDED CHANGES TO PUBLICATIONS AND
BLANK FORMS
For use of this form, see AR 25-30; the proponent agency is OAASA

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

TYPED NAME, GRADE OR TITLE

PUBLICATION/FORM NUMBER

DATE
Use Part II (reverse) for Repair Parts and
Special Tool Lists (RPSTL) and Supply
Catalogs/Supply Manuals (SC/SM).

FROM: (Activity and location) (Include ZIP Code)
TO:

REPLACES DA FORM 2028, 1 DEC 68, WHICH WILL BE USED.

PARA-
GRAPH

(Forward to proponent of publication or form) (Include ZIP Code)

PART I - ALL PUBLICATIONS (EXCEPT RPSTL AND SC/SM) AND BLANK FORMS

DATE
TITLE

PAGE
ITEM
LINE
FIGURE
NO.

TABLE
RECOMMENDED CHANGES AND REASON

* Reference to line numbers within the paragraph or subparagraph.

SIGNATURE

DA FORM 2028, FEB 74
USAPA V3.01

TO: (Forward direct to addressee listed in publication)

TYPED NAME, GRADE OR TITLE

PART III - REMARKS (Any general remarks or recommendations, or suggestions for improvement of publications and
blank forms. Additional blank sheets may be used if more space is needed.)

TITLE

FROM: (Activity and location) (Include ZIP Code)

PAGE
NO.

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

PUBLICATION NUMBER

COLM
NO.

LINE
NO.

NATIONAL STOCK
NUMBER

REFERENCE
NO.

FIGURE
NO.

ITEM
NO.

DATE

TOTAL NO.
OF MAJOR
ITEMS
SUPPORTED

RECOMMENDED ACTION

PART II - REPAIR PARTS AND SPECIAL TOOL LISTS AND SUPPLY CATALOGS/SUPPLY MANUALS

DATE

SIGNATURE

USAPA V3.01

RECOMMENDED CHANGES TO PUBLICATIONS AND
BLANK FORMS
For use of this form, see AR 25-30; the proponent agency is OAASA

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

TYPED NAME, GRADE OR TITLE

PUBLICATION/FORM NUMBER

DATE
Use Part II (reverse) for Repair Parts and
Special Tool Lists (RPSTL) and Supply
Catalogs/Supply Manuals (SC/SM).

FROM: (Activity and location) (Include ZIP Code)
TO:

REPLACES DA FORM 2028, 1 DEC 68, WHICH WILL BE USED.

PARA-
GRAPH

(Forward to proponent of publication or form) (Include ZIP Code)

PART I - ALL PUBLICATIONS (EXCEPT RPSTL AND SC/SM) AND BLANK FORMS

DATE
TITLE

PAGE
ITEM
LINE
FIGURE
NO.

TABLE
RECOMMENDED CHANGES AND REASON

* Reference to line numbers within the paragraph or subparagraph.

SIGNATURE

DA FORM 2028, FEB 74
USAPA V3.01

TO: (Forward direct to addressee listed in publication)

TYPED NAME, GRADE OR TITLE

PART III - REMARKS (Any general remarks or recommendations, or suggestions for improvement of publications and
blank forms. Additional blank sheets may be used if more space is needed.)

TITLE

FROM: (Activity and location) (Include ZIP Code)

PAGE
NO.

TELEPHONE EXCHANGE/AUTOVON,
PLUS EXTENSION

PUBLICATION NUMBER

COLM
NO.

LINE
NO.

NATIONAL STOCK
NUMBER

REFERENCE
NO.

FIGURE
NO.

ITEM
NO.

DATE

TOTAL NO.
OF MAJOR
ITEMS
SUPPORTED

RECOMMENDED ACTION

PART II - REPAIR PARTS AND SPECIAL TOOL LISTS AND SUPPLY CATALOGS/SUPPLY MANUALS

DATE

SIGNATURE

USAPA V3.01

TM 9-2320-365-20-1

Change 1

TM 9-2320-365-20-1

Change 2

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THE METRIC SYSTEM AND EQUIVALENTS

LINEAR MEASURE
SQUARE MEASURE

1 Centimeter = 10 Millimeters = 0.01 Meters = 0.3937 Inches
1 Sq Centimeter = 100 Sq Millimeters = 0.155 Sq Inches
1 Meter = 100 Centimeters = 1000 Millimeters = 39.37 Inches
1 Sq Meter = 10,000 Sq Centimeters = 10.76 Sq Feet
1 Kilometer = 1000 Meters = 0.621 Miles
1 Sq Kilometer = 1,000,000 Sq Meters = 0.386 Sq Miles

WEIGHTS
CUBIC MEASURE

1 Gram = 0.001 Kilograms = 1000 Milligrams = 0.035 Ounces
1 Cu Centimeter = 1000 Cu Millimeters = 0.06 Cu Inches
1 Kilogram = 1000 Grams = 2.2 Lb
1 Cu Meter = 1,000,000 Cu Centimeters = 35.31 Cu Feet
1 Metric Ton = 1000 Kilograms = 1 Megagram = 1.1 Short Tons

LIQUID MEASURE
TEMPERATURE

1 Milliliter = 0.001 Liters = 0.0338 Fluid Ounces
5/9 (°F - 32) = °C
1 Liter = 1000 Milliliters = 33.82 Fluid Ounces
212° Fahrenheit is equivalent to 100° Celsius
90° Fahrenheit is equivalent to 32.2° Celsius
32° Fahrenheit is equivalent to 0° Celsius
9/5 C° + 32 = F°

APPROXIMATE CONVERSION FACTORS

TO CHANGE
TO
MULTIPLY BY

Inches . . . . . . . . . . . . . . . . Centimeters . . . . . . . .
2.540
Inches . . . . . . . . . . . . . . . . Millimeters . . . . . . . . . .
25.4
Feet . . . . . . . . . . . . . . . . . . Meters
. . . . . . . . . . .
0.305
Yards . . . . . . . . . . . . . . . . . Meters
. . . . . . . . . . .
0.914
Miles . . . . . . . . . . . . . . . . . Kilometers . . . . . . . . .
1.609
Square Inches . . . . . . . . . . Square Centimeters . .
6.451
Square Feet . . . . . . . . . . . . Square Meters . . . . . .
0.093
Square Yards . . . . . . . . . . . Square Meters . . . . . .
0.836
Square Miles
. . . . . . . . . . . Square Kilometers . . .
2.590
Acres . . . . . . . . . . . . . . . . . Square Hectometers
.
0.405
Cubic Feet . . . . . . . . . . . . . Cubic Meters . . . . . . .
0.028
Cubic Yards . . . . . . . . . . . . Cubic Meters . . . . . . .
0.765
Fluid Ounces . . . . . . . . . . . Milliliters . . . . . . . . . .
29.57
Pints
. . . . . . . . . . . . . . . . . Liters
. . . . . . . . . . . .
0.473
Quarts . . . . . . . . . . . . . . . . Liters
. . . . . . . . . . . .
0.946
Gallons
. . . . . . . . . . . . . . . Liters
. . . . . . . . . . . .
3.785
Ounces
. . . . . . . . . . . . . . . Grams . . . . . . . . . . . .
28.35
Pounds
. . . . . . . . . . . . . . . Kilograms . . . . . . . . .
0.454
Pounds (force) . . . . . . . . . . Newtons . . . . . . . . . .
4.448
Short Tons . . . . . . . . . . . . . Metric Tons . . . . . . . .
0.907
Pound-Feet
. . . . . . . . . . . . Newton-Meters
. . . . .
1.356
Pounds/Sq Inch . . . . . . . . . Kilopascals . . . . . . . .
6.895
Miles per Gallon . . . . . . . . . Kilometers per Liter . .
0.425
Miles per Hour . . . . . . . . . . Kilometers per Hour . .
1.609

TO CHANGE
TO
MULTIPLY BY

Centimeters . . . . . . .
Inches . . . . . . . . . . . . .
0.394
Millimeters . . . . . . . .
Inches . . . . . . . . . . . .
0.0394
Meters . . . . . . . . . . .
Feet . . . . . . . . . . . . . . .
3.280
Meters . . . . . . . . . . .
Yards . . . . . . . . . . . . . .
1.094
Kilometers . . . . . . . .
Miles . . . . . . . . . . . . . .
0.621
Sq Centimeters . . . . .
Square Inches
. . . . . . .
0.155
Square Meters . . . . .
Square Feet . . . . . . . .
10.764
Square Meters . . . . .
Square Yards . . . . . . . .
1.196
Square Kilometers
. .
Square Miles
. . . . . . . .
0.386
Sq Hectometers . . . .
Acres . . . . . . . . . . . . . .
2.471
Cubic Meters . . . . . .
Cubic Feet . . . . . . . . .
35.315
Cubic Meters . . . . . .
Cubic Yards . . . . . . . . .
1.308
Milliliters . . . . . . . . . .
Fluid Ounces
. . . . . . . .
0.034
Liters . . . . . . . . . . . .
Pints
. . . . . . . . . . . . . .
2.113
Liters . . . . . . . . . . . .
Quarts . . . . . . . . . . . . .
1.057
Liters . . . . . . . . . . . .
Gallons . . . . . . . . . . . . .
0.264
Grams . . . . . . . . . . .
Ounces
. . . . . . . . . . . .
0.035
Kilograms . . . . . . . . .
Pounds . . . . . . . . . . . . .
2.205
Newtons . . . . . . . . . .
Pounds (force) . . . . . .
0.2248
Metric Tons
. . . . . . .
Short Tons . . . . . . . . . .
1.102
Newton-Meters . . . . .
Pound-Feet
. . . . . . . . .
0.738
Kilopascals . . . . . . . .
Pounds per Sq Inch
. . .
0.145
Km per Liter . . . . . . .
Miles per Gallon . . . . . .
2.354
Km per Hour
. . . . . .
Miles per Hour . . . . . . .
0.621

Change 1

PIN: 074407-000