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Page Title:
ELECTRICAL SYSTEM TROUBLESHOOTING INDEX |
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 TM 9-2320-361-24-1
FIELD TROUBLESHOOTING
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)
ELECTRICAL SYSTEM TROUBLESHOOTING INDEX
MALFUNCTION
TROUBLESHOOTING
NO.
MALFUNCTION
WORK PACKAGE/PAGE
BATTERY SYSTEM
All vehicle electrical systems inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00 2
STARTING SYSTEM
1. Starter will not crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00 6
2. Starter motor operates, but engine cranks slowly . . . . . . . . . . . . . . . . . . . . . . . . . . . 0012 00 14
CHARGING SYSTEM (60 AMP)
1. No alternator output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Batteries not charging properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Batteries hot or boiling, corrected specific gravity of all cells is 1.280 . . . . . . . . . . .
4. Batteries use excessive water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Batteries run down in operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHARGING SYSTEM (100 AMP)
1.
No alternator output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Batteries not charging properly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Batteries hot or boiling, corrected specific gravity of all cells is 1.280 . . . . . . . . . . .
4.
Batteries use excessive water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Batteries run down in operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0012 00 28
LIGHTING AND WIPER SYSTEM
1. Headlight does not operate on low or high or both
headlights inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Park lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Taillight or clearance lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Stoplight lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BLACKOUT LIGHTS (B. O.)
1. B. O. headlamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. B. O. light marker lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. B. O. taillight lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. B. O. stoplight lamp does not light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECTIONAL SIGNAL SYSTEM
1. Direction signal inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. All stoplights are inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Both direction signals inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Turn signals operate incorrectly with turn signal control lever in one
or more positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0011 00-1
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