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 HEADLIGHTS DO NOT WORK — Continued 0031 00 3Y 1. Turn MASTER SWITCH to OFF (see your -10). 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 lighting control switch jack (2) pins F (3) and M (4). 5. Does multimeter read 0 ohms? 3YN 1. Install dimmer switch and front main harness plug on dimmer switch jack. 2. Replace lighting control switch (WP 0242 00). 3. Verify no faults found. 4Y 1. Repair front main harness circuit 16 (WP 0312 00). 2. Verify no faults found. BY 1. Remove circuit 17 (high beam) plug (1) or circuit 18 (low beam) plug (2) from failing service headlight jack (3). 2. Measure voltage on front main harness circuit 17 plug (1) or circuit 18 plug (2) and ground. 3. Does multimeter read less than 17 volts? BYN 1. Replace service headlight lamp unit (WP 0257 00) or service headlight assembly (WP 0256 00). 2. Verify no faults found. 0031 00-2