TM-9-2350-277-20-1

CARRIER M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL VOLUME 1 OF 6

TM-9-2350-277-20-1 - Page 239 of 855

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.

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