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 DOME LIGHT MALFUNCTION (M577A3 ONLY)—Continued 0040 00 DY 1. Turn blackout dome lights on using front dome light switch. 2. Remove circuit 38 plug (1) from rear dome light switch jack (2). 3. Measure voltage between circuit 38 plug (1) and ground. 4. Does multimeter read 17 volts or more? YES NO DYN 1. Turn MASTER SWITCH to OFF. 2. Repair rear main harness circuit 38 (WP 0382 00). 3. Verify no faults found. D2Y 1. Turn MASTER SWITCH to OFF. 2. Replace rear dome light switch (WP 0315 00). 3. Verify no faults found. EY 1. Turn dome lights on using rear dome light switch. 2. Remove circuit 38 plug (1) from front dome light switch jack. 3. Measure voltage between circuit 38 plug (1) and ground. 4. Does multimeter read 17 volts or more? YES NO EYN 1. Turn MASTER SWITCH to OFF. 2. Repair wiring harness circuit 38 (WP 0382 00). 3. Install master switch panel on distribution box (WP 0261 00). 4. Verify no faults found. 0040 00-5