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 190 of 1207

TM 9-2320-361-20

Table 2-4. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR lNSPECTlON

CORRECTIVE ACTION

20. STOPLIGHT LAMP DOES NOT LIGHT

Test 1. Test battery voltage at rear composite light.

Step 1. Turn main light switch to OFF position.

Step 2. Disconnect lead 22/460 or lead 22/461 from rear composite light on side of vehicle where

stoplight has failed.

NOTE

Ensure turn indicator is in NEUTRAL position.

Step 3. Check for battery voltage on contact end of lead 22/460 or 22/461.

a. Depress brake pedal to activate stoplight switch.

b. If voltage is present, go to test 2 and check lamp filament.

c. If battery voltage is not present, go to malfunction 17, test 3, and test lighting system

harness connector pin C.

Test 2. Test continuity of filament in stoplight lamp.

Check continuity between frame grounds and lead 22/460 or 22/461 connected to rear com-

posite light.

If continuity is present, check for corroded contacts at lamp and leads 22/460 or 22/461

connection to rear wiring harness. Reconnect lead 22/461 or 22/460.

END OF TESTING!

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