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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 INFRARED HEADLIGHT(S) DON’T WORK—Continued 0032 00 2Y 1. Turn MASTER SWITCH to OFF. 2. Remove two screws (1), washers (2), and dimmer switch (3). 3. Remove harness 12349881 plug (4) from dimmer switch jack (5). 4. Turn MASTER SWITCH to ON. 5. Measure voltage between harness 12349881 plug (4) pin C (6) and ground. 6. Does multimeter read less than 17 volts? YES NO GO TO BY (PAGE 0032 00-6) 3Y 1. Turn MASTER SWITCH to OFF. 2. Remove instrument panel for access. See task: remove instrument panel mounts and ground lead (WP 0295 00). 3. Remove harness 12349881 514/515 (1) and 520 (2) from IR/BO selector switch jacks (3) and (4). 4. Measure resistance between IR/BO selector switch jacks (3) and (4). 5. Does multimeter read 0 ohms? YES NO 3YN 1. Install dimmer switch and harness 12349881 plug on dimmer switch. 2. Replace IR/BO selector switch (WP 0282 00). 3. Verify no faults found. 0032 00-2