ALL ELECTRICAL SYSTEMS ARE WEAK

TM 10-3930-638-24&P

2-20. BATTERY SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ALL ELECTRICAL SYSTEMS ARE WEAK (cont)

Step 3. Connect voltmeter leads to positive and

negative posts of one battery.

Note voltmeter indication while an assistant

cranks engine.

Repeat for remaining battery.

If voltmeter indicates less than 9.6 Vdc,

check the specific gravity of each battery cell.

If there is more than 25 points variation

(0.025) between individual cells, replace

2. BATTERIES ARE HOT OR USE EXCESSIVE WATER

Connect voltmeter leads to alternator BAT terminal

and case (ground).

With all accessories turned off, operate engine at 1800

rpm and note voltmeter indication.

If voltmeter indicates more than 31 Vdc,

replace alternator (para 2-26).

2-21. STARTING SYSTEM TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. STARTER CRANKS TOO SLOWLY

Step 1. Connect positive voltmeter lead to solenoid B

terminal and negative voltmeter lead to solenoid

M terminal.

Note voltmeter indication while assistant

cranks engine.

a. If voltmeter indicates less than 0.3 Vdc,

proceed to step 2.

b. If voltmeter indicates more than 0.3 Vdc,

replace starter assembly (para 2-27a).