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

Page 387 of 1275

TM 9-2350-311-20-1 CONTINUED FROM STEP A 1. - 2. 3. 4. 5. 6. 7. 8. Reconnect accessory control box-to-heater/ blower wiring harness to personnel heater. Disconnect battery ground leads. Disconnect accessory control box-to-heater/ blower wiring harness from accessory control box. Place a jumper wire from pin A to socket A (lead 400). Place red lead of multimeters in socket E (lead 405) and black lead to ground. Reconnect battery ground leads. Turn MASTER switch ON, HEAT SELECTOR switch to LOW and check for voltage. Turn MASTER and HEAT SELECTOR switches OFF. is voltage present? I Go to step D. I 1. Disconnect battery ground leads. 2. Place red lead of multimeters on pin A (lead 400) and black lead to ground. 3. Reconnect battery ground leads. 4. Turn MASTER switch ON and check for voltage. 5. Turn MASTER switch OFF. Is voltage present? Troubleshoot master relay circuit I Repair or replace lead 400 of accessory control box wiring harness (para 8-53). 3-287 (para 3-3b).