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
