TM-9-2350-261-20-1

CARRIER, M113A2, M577A2, M1064, M1068, M1059 AND M901A1

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL - VOLUME 1 OF 4

TM-9-2350-261-20-1 - Page 219 of 346

TM 9-2350-261-20-1

SERVICE HEADLIGHTS DO NOT WORK — Continued

0031 00

3Y

1.

Turn MASTER SWITCH to OFF (see your -10).

2.

Remove instrument panel for access (WP 0238 00).

3.

Remove front main harness plug (1) from lighting

control switch jack (2).

4.

Measure resistance between lighting control switch jack

(2) pins F (3) and M (4).

5.

Does multimeter read 0 ohms?

3YN

1.

Install dimmer switch and front main

harnessplugondimmerswitchjack

.

2.

Replace lighting control switch

(WP 0242 00).

3.

Verify no faults found.

4Y

1.

Repair front main harness circuit 16 (WP 0312 00).

2.

Verify no faults found.

BY

1.

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

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

2.

Measure voltage on front main harness circuit 17 plug (1)

orcircuit18plug(2)andground

.

3.

Does multimeter read less than 17 volts?

BYN

1.

Replace service headlight lamp unit

(WP 0257 00) or service headlight

assembly (WP 0256 00).

2.

Verify no faults found.

003100-2