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 TRAILER LIGHTS DON’T WORK—Continued 0036 00 3Y 1. Turn MASTER SWITCH to ON. 2. Turn lighting control switch to BO marker. 3. Measure voltage between trailer receptacle (1) pins A (2), C (3), and F (4) to ground while depressing brake pedal. 4. Does multimeter read 17 volts or more for all readings? YES NO 3YN 1. Replace harness 11589191 (WP 0375 00). 2. Verify no faults found. 4Y 1. Turn lighting control switch to SER DRIVE. 2. Measure voltage between trailer receptacle (1) pins B (2) and E (3) to ground while depressing brake pedal. 3. Does multimeter read 17 volts or more? YES NO 4YN 1. Replace harness 11589191 (WP 0375 00). 2. Verify no faults found. 5Y 1. Faulty trailer harness(es) and/or lights. Beyond unit maintenance repair. 2. Troubleshoot trailer lights. See Trailer TM. 0036 00-2