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TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download

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TM9-2350-311 -20-1 3-3 TROUBLESHOOTING CHART — CONTINUED ae. ELECTRIC FUEL PUMP CIRCUIT — CONTINUED ENGINE MISSES WHEN LOW ON FUEL; ONE OR BOTH FUEL PUMPS FAIL TO OPERATE — CONTINUED CONTINUED FROM STEP K U 1 “ 2. 3. 4. 5. Reconnect lead 588 to driver’s instrument panel wiring harness to FUEL PRIMER switch. Disconnect lead 588 of driver’s instrument panel wiring harness from circuit breaker output. Place red lead of multimeter on circuit breaker output and black lead to ground. Turn MASTER switch ON and check for voltage. Turn MASTER switch OFF. i Is voltage present? I I I I Repair or replace lead 588 of driver’s I instrument panel wiring harness (para 8-51). V 1. Reconnect lead 588 of driver’s instrument panel wiring harness to circuit breaker. 2. Disconnect lead 10 of circuit breaker-to-”Y” connector lead from circuit breaker input. 3. Place red lead of multimeter 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? I 1 Replace circuit breaker (para 8-33, M109A2/M109A3; 8-34, M109A4/ M109A5). , CONTINUED ON NEXT PAGE 3-340