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 151 of 346

TM 9-2350-261-20-1

ENGINE CRANKS BUT WILL NOT START BELOW 40 (AIR BOX HEATER

IS USED) — Continued

0012 00

D3Y

1.

Remove air box heater switch (WP 0241 00).

2.

Remove circuit 406 (1) and 27C (2) plugs from air box

heater switch jacks (3) and (4).

3.

Measure resistance between switch jacks (3) and (4)

with air box heater ON.

4.

Does multimeter read 0 ohms?

D3YN

1.

Replace air box heater switch

(WP 0241 00).

2.

Verify no faults found.

D4Y

1.

Remove circuit 27 plug (1) from instrument panel

circuit breaker (2).

2.

Measure resistance between instrument panel wiring harness

circuit 27 (1) and 27C (3) plug pins.

3.

Does multimeter read 0 ohms?

D4YN

1.

Repair instrument panel

wiring harness circuit 27C/27

(WP 0312 00).

2.

Verify no faults found.

D5Y

1.

Repair front main harness circuit 406 (WP 0312 00).

2.

Verify no faults found.

0012 00-10