BATTERY SYSTEM TROUBLESHOOTING

TM 10-3930-638-24&P

2-19. TROUBLESHOOTING SYMPTOM INDEX (cont)

Para/Malfunction

Page

CHARGING SYSTEM

Abnormal alternator light operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-22/1

2-103

Alternator output low, unsteady, or zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-22/2

2-104

HORN SYSTEM

2-23/1

Horn does not sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-105

Back-up alarm does not sound.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-23/2

2-106

LIGHT SYSTEMS

Front floodlights inoperative.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-24/1

2-107

Front black out light inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-24/2

2-107

Black out tail lights inoperative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-24/3

2-108

2-24/4

Service taillights inoperative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-109

2-24/5

Black out stoplights inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-109

2-24/6

2-110

Service stoplights inoperative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear flood lights inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gage lights inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTRUMENT PANEL

Warning lights inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-25/ 1

2-112

Warning lights, back-up alarm, and electric fuel pump inoperative . . . . . . . . . . . . . . . . . .

2-25/2

2-113

2-20. BATTERY SYSTEM TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ALL ELECTRICAL SYSTEMS ARE WEAK

Step 1. Connect voltmeter leads to connectors of negative battery cable at battery post and starter

ground.

Note voltmeter indication while an assistant cranks engine.

a. If voltmeter indicates less than 0.5 Vdc, proceed to step 2.

b. If voltmeter indicates more than 0.5 Vdc, replace the negative battery cable

(para 2-33b)

Step 2. Connect voltmeter leads to connectors of positive battery cable at battery post and starter B terminal.

Note voltmeter indication while an assistant cranks engine.

a. If voltmeter indicates less than 0.5 Vdc,

proceed to step 3.

b. lf voltmeter indicates more than 0.5 Vdc,

replace the positive battery cable

(para 2-33 b).

2-99