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TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download

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TM 9-2350-277-20-1 RIGHT REAR UTILITY OUTLET/ADMITTANCE BUZZER WORKS IMPROPERLY (M577A3 AND M1068A3 ONLY)—Continued 0042 00 3Y 1. Turn MASTER SWITCH to OFF. 2. Faulty rear main wiring harness. Beyond unit maintenance repair. 3. Notify supervisor. AY 1. Remove eight nuts (1), washers (2), and screws (3) from master switch panel (4). Pull panel away from distribution box (5). 2. Remove circuit 10 and 37A plugs (6) and (7) from circuit breaker jacks (8) and (9). 3. Measure resistance between circuit breaker jacks (8) and (9). 4. Does multimeter read 0 ohms? YES NO AYN 1. Replace circuit breaker (WP 0280 00). 2. Verify no faults found. A2Y 1. Turn MASTER SWITCH to ON. 2. Measure voltage at circuit 10 plug. 3. Does multimeter read less than 17 volts? YES NO A2YN 1. Turn MASTER SWITCH to OFF. 2. Faulty rear main wiring harness circuit 37A. Beyond unit maintenance repair. 3. Notify supervisor. 0042 00-2