TM-9-2320-361-20

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; UNIT MAINTENANCE

OCTOBER 1991

TM-9-2320-361-20 - Page 188 of 1207

TM 9-2320-361-20

Table 2-4. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 3. Test lighting system harness connector voltage.

Step 1.

Step 2.

Step 3.

Step 4.

Step 5.

Step 6.

Turn main light switch lever to OFF position.

Remove light switch assembly from instrument panel (para. 4-18).

Disconnect harness connector from light switch assembly (para. 4-18).

Check for battery voltage in harness connector at pin F.

CAUTION

Voltage at pin F is tied directly to battery without fuse protection.

Insert jumper wire in pin of faulty circuit being tested first to pre-

vent energized jumper wire from touching ground and damaging

wiring harness.

a.

b.

c.

If battery voltage is indicated at pin F, connect a jumper wire from pin F to socket pin of

faulty circuit.

If lamps light with jumper wire connected, replace main light switch (para. 4-18).

If battery voltage is not indicated, go to step 5.

Check circuit 15 for loose connections or broken wire.

Repair broken wire. If wiring cannot be repaired, notify your supervisor.

Reconnect front wiring harness connector to light switch and reinstall light switch

(para. 4-18).

END OF TESTING!

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