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 Q R 1. 2. 3. 4. With lead 76B still disconnected from engine oil pressure switch, disconnect lead 76 from left fuel pump. Place jumper wire from lead 76B to ground. Turn MASTER switch ON and check for fuel flow. Turn MASTER switch OFF. Is there fuel flow? I I Go to step T. 1. 2. 3. 4. 5. Reconnect lead 76B to engine oil pressure switch. With lead 76 disconnected from left fuel pump, disconnect lead GND from fuel pump. Using jumper wires, connect lead GND to bulkhead and lead 76 to positive battery terminal. Turn MASTER switch ON and check for fuel flow. Turn MASTER switch OFF. Is there fuel flow? I Reconnect fuel lines and replace Reconnect fuel lines and repair or replace lead 76 of bulkhead-to-headlights/bilge pump wiring harness (para 8-47). 3-338 left fuel pump (para 6-5).