TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 370 of 1275
TM 9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED w. STOP LIGHT CIRCUIT — CONTINUED B.O. STOP LIGHT FAILS TO OPERATE; ALL OTHER LIGHTS OPERATE — CONTINUED CONTINUED FROM STEP A B 1. Install inoperative B.O. stop light assembly (para 8-25). 2. Disconnect lead 23 of bulkhead-to-driver’s instrument panel wiring harness from taillight lead assembly. 3. Place red lead of multimeters in lead 23 and black lead to ground. 4. Turn MASTER switch ON, place main light switch to B.O. DRIVE position, apply parking brake, and check for voltage. 5. Turn MASTER and main light switches OFF. Is voltage present? Replace taillight lead assembly (para 8-25). C 1. Reconnect lead 23 of bulkhead-to-driver’s instrument panel wiring harness to taillight assembly. 2. Disconnect bulkhead-to-driver’s instrument panel wiring harness from main light switch. 3. Place a jumper wire from socket F (lead 15) to socket N (lead 23). 4. Turn MASTER switch ON, place main light switch to B.O. DRIVE position, apply parking brake, and check B.O. stop light for operation. 5. Turn MASTER and main light switches OFF. Does B.O. stop light operate? Replace light switch (para 8-17). I Repair or replace lead 23 of bulkhead-to- driver’s instrument panel wiring harness (para 8-50). I END OF TASK 3-270