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

Page 146 of 1275

TM 9-2350-311-20-1 3-3 TROUBLESHOOTING CHART — CONTINUED d. STARTER MOTOR CIRCUIT (M109A4/M109A5)— (1) ENGINE DOES NOT CRANK; ALL ELECTRICAL CONTINUED ACCESSORIES OPERATE — CONTINUED CONTINUED FROM STEP J 1. Reconnect connector to voltage 2. 3. 4. 5. regulator. Disconnect lead 14 from output side of neutral safety switch. Place red lead of multimeter on lead 14 and black lead to ground. Turn MASTER switch ON, push STARTER switch, and check for voltage. Turn MASTER switch OFF. Is voltage present? Go to step M. 1. Reconnect lead 14 to output side of neutral safety switch. 2. Disconnect driver’s bulkhead-to-master relay wiring harness from driver’s bulkhead. 3. Place a jumper wire from socket B to pin B (lead 400-459B). 4. Place red lead of multimeter in socket T (lead 14) and black lead to ground. 5. Turn MASTER switch ON, push STARTER switch, and check for voltage. 6. Turn MASTER switch OFF. Is voltage present? Repair or replace lead 14 of driver’s bulkhead-to-master relay wiring harness (para 8-46). Repair or replace lead 14 of bulkhead- to-portable instrument panel wiring harness (para 8-49). 3-46