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 443 of 855

TM 9-2350-277-20-1

COOLANT HEATER MALFUNCTIONS — Continued

0089 00

A3Y

1.

Remove heater control box (WP 0736 00).

2.

Measure resistance between lead ends from circuit breaker

terminals16(1)and17(2)

.

3.

Does multimeter read 0 ohms?

A3YN

1.

Replace heater circuit breaker

(WP 0737 00).

2.

Verify no faults found.

A4Y

1.

Measure resistance between lead ends from circuit breaker

terminal 17 (1) to indicator light terminal 3 (2).

2.

Does multimeter read 0 ohms?

A4YN

1.

Repair/replace faulty lead

(WP038200orWP073700)

.

2.

Verify no faults found.

A5Y

1.

Replace indicator light assembly (WP 0737 00).

2.

Verify no faults found.

008900-4

Change 5