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 INFRARED HEADLIGHT(S) DON’T WORK—Continued 0032 00 BY 1. Install harness 8763491 circuit 514 or 515 plug on IR head light. 2. Measure resistance between dimmer switch jack (1) pins C (2) to A (3) and between pins C (2) to B (4). Multimeter should read 0 ohms once and infinity once. 3. Click dimmer switch and repeat above test. Multimeter should read infinity once and 0 ohms once. 4. Is dimmer switch working properly? YES NO BYN 1. Replace dimmer switch (WP 0333 00). 2. Verify no faults found. B2Y 1. Faulty harness 12349881 circuit 514 or 515. Beyond unit maintenance repair. 2. Notify supervisor. 0032 00-6