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 2Y 1. Remove circuit 38E (1) and 38A (2) plugs form rear dome light switch jacks (3)(4). 2. Install a jumper wire between circuit 38E (1) and 38A (2) plugs. 3. Operate front dome light switch. 4. Do blackout dome lights malfunction? YES NO GO TO DY (PAGE 0040 00-5) 3Y 1. Remove jumper from circuit 38E and 38A plugs. 2. Measure voltage at circuit 38E plug. 3. Does multimeter read 17 volts or more? YES NO 3YN 1. Turn MASTER SWITCH to OFF. 2. Repair rear main harness circuit 38E (WP 0382 00). 3. Verify no faults found. 0040 00-2