TM 9-2350-247-20-1
TRAILER LIGHTS DO NOT OPERATE—Continued
0043 00
3Y
1. Turn MASTER SWITCH ON.
2. Turn light switch to BO marker.
3. (H) Measure voltage between trailer receptacle (1) pins A (2), C
(3), and F (4) to ground with steering levers pulled back.
4. Does multimeter read 17 volts or more for all readings?
YES
NO
3YN
1. Replace trailer wiring harness
(WP 0301 00).
2. Verify no faults found.
4Y
1. Turn light switch to SER DRIVE.
2. (H) Measure voltage between trailer receptacle (1) pins B (2) and
E (3) to ground with steering levers pulled back.
3. Does multimeter read 17 volts or more?
YES
NO
4YN
1. Replace trailer wiring harness
(WP 0301 00).
2. Verify no faults found.
5Y
1. Faulty trailer harness(es) and/or lights.
2. Notify your supervisor.
0043 00-2
