TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 COOLANT HEATER MALFUNCTIONS — Continued 0070 00 EY 1. Remove heater harness plug (1) from heater control jack (2). 2. Measure voltage between heater control jack (2) pin A (3) and ground with HEATER SWITCH on START. 3. Does multimeter read more than 17 volts? EYN GO TO FY (PAGE 0070 00-8) E2Y 1. Install heater harness on heater control box jack. 2. Remove heater harness 402A plug (1) from heater fuel pump jack (2). 3. Measure voltage between plug (1) pin and ground with HEATER SWITCH on START. 4. Does multimeter read more than 17 volts? E2YN 1. Faulty heater harness circuit 402. 2. Notify your supervisor. E3Y 1. Replace coolant heater fuel pump (WP 0640 00 or WP 0641 00). 2. Verify no faults found. 0070 00-7