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 b. MASTER RELAY CIRCUIT — CONTINUED (2) MASTER SWITCH INDICATOR LIGHT FAILS TO OPERATE; MASTER SWITCH IS ON — CONTINUED CONTINUED FROM STEP F u 1. Reconnect connector to voltage regulator. 2. Disconnect engine disconnect bracket-to- bulkhead wiring harness from driver’s bulkhead. 3. Place red lead of multimeter in socket B (lead 400/459B) and black lead to ground. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. I Is voltage present? Replace or repair lead 400/459B of engine disconnect bracket-to- bulkhead wiring harness (para 8-45, M109A2/M109A3; para 8-48, M109A4/M109A5). CONTINUED ON NEXT PAGE 3-26