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 231 of 346

TM 9-2350-261-20-1

SERVICE AND/OR BLACKOUT STOPLIGHTS MALFUNCTION — Continued

0033 00

3Y

1.

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

2.

Remove front main harness circuit 75A plug (1) from

stoplight switch jack (2).

3.

Remove front main harness circuit 75B plug (3) from

stoplight switch jack (4).

4.

Measure resistance between switch jacks (2) and (4) with

switch depressed and with switch released.

5.

Does multimeter read infinity with switch depressed and 0

ohm with switch released?

3YN

1.

Replace stoplight switch

(WP 0290 00).

2.

Verify no faults found.

4Y

1.

Install front main harness circuit leads 75A and 75B

on stoplight switch.

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 front main harness plug (1)

pins K (3) and A (4) with both steering levers locked

in parking brake position.

5.

Does multimeter read less than 0 ohm?

4YN

1.

Faulty front main harness circuit

75A and/or 75B. Beyond unit

maintenance repair.

2.

Notify your supervisor.

003300-2

5Y

1.

Replace main light switch (WP 0242 00).

2.

Verify no faults found.