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 442 of 855

TM 9-2350-277-20-1

COOLANT HEATER MALFUNCTIONS — Continued

0089 00

10Y

1.

Replace heater (WP 0728 00).

2.

Verify no faults found.

AY

1.

Remove heater indicator cover lens (1) and bulb (2).

2.

Measure resistance between bulb center contact and base.

3.

Does multimeter read less than 100 ohms?

AYN

1.

Replace heater bulb (WP 0702 00).

2.

Verify no faults found.

A2Y

1.

Remove harness 12268797 circuit 400 plug (1) from

control box jack (2).

2.

Measure voltage between harness 12268797 circuit 400

plug (1) pin and ground.

3.

Does multimeter read 17 volts or more?

A2YN

1.

Repair harness 12268797 circuit 400

between MASTER SWITCH and

heater control box (WP 0382 00).

2.

Verify no faults found.

008900-3

Change 5