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 223 of 346

TM 9-2350-261-20-1

INFRARED HEADLIGHT(S) DOES NOT OPERATE — Continued

0032 00

2Y

1.

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

2.

Remove hull front access cover (WP 0429 00).

3.

Remove front main harness plug (1) from dimmer switch jack (2).

4.

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

5.

Measure voltage between front main harness plug (1)

pin C (3) and ground.

6.

Does multimeter read less than 17 volts?

2YN

GO TO

CY

(PAGE 0032 00-7)

3Y

1.

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

2.

Remove instrument panel for access (WP 0238 00).

3.

Remove front main harness circuit 514/515 (1) and 520 (2)

from IR/BO selector switch jacks (3) and (4).

4.

Measure resistance between IR/BO selector switch

jacks (3) and (4).

5.

Does multimeter read 0 ohms?

3YN

1.

Install dimmer switch and front main

harness plug on dimmer switch.

2.

Replace IR/BO selector switch

(WP 0241 00).

3.

Verify no faults found.

003200-2