TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 SERVICE AND/OR BLACKOUT STOPLIGHTS MALFUNCTION — Continued 0033 00 3Y 1. Turn MASTER SWITCH to OFF (see your -10). 2. Remove front main harness circuit 75A plug (1) from stoplight switch jack (2). 3. Remove front main harness circuit 75B plug (3) from stoplight switch jack (4). 4. Measure resistance between switch jacks (2) and (4) with switch depressed and with switch released. 5. Does multimeter read infinity with switch depressed and 0 ohm with switch released? 3YN 1. Replace stoplight switch (WP 0290 00). 2. Verify no faults found. 4Y 1. Install front main harness circuit leads 75A and 75B on stoplight switch. 2. Remove instrument panel for access (WP 0238 00). 3. Remove front main harness plug (1) from lighting control switch jack (2). 4. Measure resistance between front main harness plug (1) pins K (3) and A (4) with both steering levers locked in parking brake position. 5. Does multimeter read less than 0 ohm? 4YN 1. Faulty front main harness circuit 75A and/or 75B. Beyond unit maintenance repair. 2. Notify your supervisor. 0033 00-2 5Y 1. Replace main light switch (WP 0242 00). 2. Verify no faults found.