TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED t. DOME LIGHT CIRCUIT — CONTINUED DOME LIGHT FAILS TO OPERATE; ALL OTHER LIGHTS OPERATE — CONTINUED CONTINUED FROM STEP A D 1. Reconnect lead 38 to dome light. 2. Disconnect lead 37-38 from circuit breaker output. 3. Place red lead of multimeters in circuit breaker output and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? Repair or replace lead 37-38 of bulkhead-to-driver’s instrument panel wiring harness (para 8-50). 1. Reconnect lead 37-38 from circuit breaker output. 2. Disconnect lead 10 from circuit breaker input. 3. Place red lead of multimeters in lead 10 and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? Replace circuit breaker (para 8-33, M109A2/M109A3; 8-34, M109A4/ M109A5). Repair or replace lead 10 of power lead wiring harness (para 8-55, M109A2/ M109A3; 8-56, M109A4/M109A5). 3-242 END OF TASK