TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9–2350–311–20–2 3–84 3–3 TROUBLESHOOTING — CONTINUED g. CAB POWER SYSTEM — CONTINUED (1) ALL CAB ELECTRICAL COMPONENTS FAIL TO OPERATE. — CONTINUED 1. Turn MASTER switch to OFF. 2. Reconnect J2 harness connector at gunner’s selector switch box assembly. 3. Open gunner’s selector switch box assembly. 4. Turn MASTER switch to ON. 5. Place red multimeter lead on circuit breaker input terminal A and black lead to ground. 6. Check for voltage. Is battery voltage present? 1. Place red multimeter lead on circuit breaker output terminal B and black lead to ground. 2. Check for voltage. Is battery voltage present? Repair wire 100 from har- ness connector to circuit breaker (para 8–12). G yes no CONTINUED ON NEXT PAGE CONTINUED FROM STEP F H yes no Replace circuit breaker (para 8–12). GUNNER’S SELECTOR SWITCH BOX ASSEMBLY INPUT TERMINAL A – + GUNNER’S SELECTOR SWITCH BOX ASSEMBLY OUTPUT TERMINAL B – + CIRCUIT BREAKER CIRCUIT BREAKER