TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 157 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-10.
TROUBLESHOOTING SYMPTOM INDEX.
MALFUNCTION
MALFUNCTION
TROUBLESHOOTING
NO
PROCEDURE
PAGE
ELECTRICAL SYSTEM
22
Starter Motor is Noisy and Engagement is Erratic
(STE/ICE Tests GO1-G02-G04-NG20-NG80).
.....................................................................
2-62
23
Retarder Not Working in One or Two Selector Positions .
....................................................
2-62
24
No Retarding Action.
.............................................................................................................
2-66
25
Batteries are Being Undercharged or Overcharged
(STE/ICE Tests GO1-G04-NG50-NG80-NG81) .
..................................................................
2-70
26
Hot Engine Indicator Not Working
(STE/ICE Tests GO1-NG31) .
...............................................................................................
2-71
27
Low Engine Oil Indicator Not Working
(STE/ICE Tests GO1-NG05-NG31).
.....................................................................................
2-76
28
Low Air Pressure Indicator and/or Buzzer Not Working .
......................................................
2-80
29
Differential Lock Lamp Not Working .
....................................................................................
2-84
30
Park Brake Lamp Not Working .
............................................................................................
2-87
31
Instrument Panel Gages Not Working .
.................................................................................
2-90
32
Tachograph Clock Not Working .
..........................................................................................
2-98
33
No Power at 12-volt Circuit Breakers CB-2, CB-3,
and/or CB-4.
........................................................................................................................
2-100
34
No Power at 12-volt Circuit Breakers CB-1, CB-5, CB-6,
and/or CB-7.
........................................................................................................................
2-110
35
No Power at 24-volt Circuit Breakers CB-8 and/or CB-9.
...................................................
2-120
36
Shift Tower Lamp Not Working.
..........................................................................................
2-124
37
Ether Lamp and/or Clearance Lamp Not Working .
............................................................
2-125
38
Washer Lamp and/or Wiper Lamp Not Working .
...............................................................
2-128
39
Heater Lamp Not Working .
.................................................................................................
2-130
40
Instrument Panel Gage Lamp or Lamps Not Working.
.......................................................
2-131
41
Both Headlamps Blink On and Off.
.....................................................................................
2-134
42
One Headlamp Not Working.
..............................................................................................
2-138
43
Both Headlamps Not Working in either High or
Low Beam Position .
............................................................................................................
2-140
44
Headlamp Switch Not Working.
..........................................................................................
2-142
45
Dimmer Switch Indicator Lamp Not Working.
.....................................................................
2-143
46
Both Front Marker Lamps Not Working
(Front Turn Signal Lamps OK).
...........................................................................................
2-144
47
One Front Marker Lamp Not Working
(Front Turn Signal Lamp OK) .
............................................................................................
2-146
48
One or More Cab Clearance and Marker Lamps Not Working .
.........................................
2-150
49
All Cab Clearance and Marker Lamps Not Working.
..........................................................
2-154
50
One Taillamp Not Working .
................................................................................................
2-156
51
Both Taillamps Not Working .
..............................................................................................
2-157
52
One Front Turn Signal Lamp Not Working .
........................................................................
2-160
2-32
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