TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 273 of 1313
GENERAL TROUBLESHOOTING INDEX - Continued
Malfunction/Symptom
Troubleshooting Procedure
EXPANSIBLE VAN
1.
Side Panels Hard To Retract Or Expand.
.........................................................................................
WP
0079
2.
Side Panel Cannot Be Locked In Retracted Position.
.......................................................................
WP
0080
3.
Van Body Not Waterproof Or Light Tight.
..........................................................................................
WP
0081
4.
Door Lock Will Not Operate.
..............................................................................................................
WP
0082
ENGINE AND VEHICLE ELECTRICAL SYSTEM
1.
Engine And Vehicle Electrical System Malfunctioning.
.....................................................................
WP
0083
2.
Engine Will Not Crank; Some Electrical Systems Inoperative Or
Weak.
................................................................................................................................................
WP
0084
3.
All Vehicle Electrical Systems Inoperative.
.......................................................................................
WP
0085
4.
Starter Motor Inoperative.
.................................................................................................................
WP
0086
5.
Solenoid Operates, Starter Operates, But Engine Cranks Slowly.
....................................................
WP
0087
6.
Starter Motor Inoperative; No Solenoid Thump.
................................................................................
WP
0088
7.
No Or Low Alternator Output.
............................................................................................................
WP
0089
8.
No Alternator Output (100 Amp Alternator).
......................................................................................
WP
0090
9.
Alternator Overcharging, Battery Indicator Gauge In Red
Position.
............................................................................................................................................
WP
0091
10.
Headlamp (One Side) Inoperative.
....................................................................................................
WP
0092
11.
Headlamp (Both Sides) Inoperative.
.................................................................................................
WP
0093
12.
Blackout Drive Or Blackout Marker Light Inoperative.
.......................................................................
WP
0094
13.
Stoplight Inoperative (Service Or Blackout).
.....................................................................................
WP
0095
14.
Tail Or Marker Lights Inoperative.
.....................................................................................................
WP
0096
15.
Individual Lights Do Not Light With Directional Signal Lever In
Any Position.
.....................................................................................................................................
WP
0097
16.
No Lights Operate With Directional Signal Control Lever In Any
Position.
............................................................................................................................................
WP
0098
17.
System Operates Incorrectly In One Or More Positions Of
Directional Signal Control Lever.
.......................................................................................................
WP
0099
18.
Protective Control Box Assembly Test.
.............................................................................................
WP
0100
INDICATOR, GAUGE, AND WARNING SYSTEM
1.
Speedometer Or Tachometer Noisy Or Erratic.
................................................................................
WP
0101
2.
Air Pressure Gauge Inoperative.
.......................................................................................................
WP
0102
3.
Oil Pressure Gauge Inoperative (Oil Level Is Correct).
.....................................................................
WP
0103
TM 9-2320-272-23-1
0005
0005-4
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