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 INSTRUMENT PANEL AND/OR TRANS CONTROLLER ILLUMINATION LIGHTS MALFUNCTION—Continued 0038 00 2Y 1. Move MASTER POWER switch to OFF. 2. Install instrument panel illumination light and controller indicator cover lenses and gaskets. 3. Remove instrument panel for access (WP 0295 00). 4. Remove harness 12349881 plug (1) from LIGHTING CONTROL switch jack (2). 5. Remove harness 12349813 circuit 40 plug (3) from harness 12349881 circuit 40 jack (4). 6. Measure resistance between harness 12349881 LIGHTING CONTROL switch plug (1), pin B (5), and circuit 40 jack (4) pin (6). 7. Does multimeter read 0 ohms? YES NO 2YN 1. Faulty harness 12349881, circuit 40. Beyond unit maintenance repair. 2. Notify supervisor. 3Y 1. Replace main light switch (WP 0283 00). 2. Verify no faults found. 0038 00-2