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 224 of 855

TM 9-2350-277-20-1

SERVICE HEADLIGHTS DON’T WORK—Continued

0031 00

AY

1.

Remove circuit 17 (high beam) plug (1) or circuit 18 (low beam)

plug (2) from failing service headlight jack (3).

2.

Measure voltage between harness 12349881 circuit 17 plug (1) or

circuit 18 plug (2) and ground.

3.

Does multimeter read less than 17 volts?

YES

NO

AYN

1.

Replace service headlight bulb

(WP 0303 00).

2.

Verify no faults found.

A2Y

1.

Is failing headlight located on right side of carrier?

YES

NO

A2YN

1.

Repair circuit 514 or 515 between

left IR headlight and dimmer switch

(WP 0382 00).

2.

Verify no faults found.

A3Y

1.

Remove harness 8763491 plug (1) from harness 12349881 jack

(2) at carrier bulkhead.

2.

Measure voltage between harness 12349881 jack (2) pin C (low

beam) (3) or pin B (high beam) (4) and ground.

3.

Does multimeter read less than 17 volts?

YES

NO

A3YN

1.

Replace faulty harness 8763491

(WP 0373 00).

2.

Verify no faults found.

0031 00-3