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 445 of 855

TM 9-2350-277-20-1

COOLANT HEATER MALFUNCTIONS — Continued

0089 00

CY

1.

Remove heater control box (WP 0736 00).

2.

Measure resistance between lead ends from circuit

breaker terminal 17 (1) and ON/OFF/START switch

terminal 15 (2) lead ends.

3.

Does multimeter read 0 ohms?

CYN

1.

Repair faulty lead (WP 0382 00).

2.

Verify no faults found.

C2Y

1.

Measure resistance between lead ends from ON/OFF/START

switch terminals 21 (1) and 14 (2).

2.

Does multimeter read 0 ohms?

C2YN

1.

Repair heater switch jumper lead

between terminal 21 and 14

(WP 0382 00).

2.

Verify no faults found.

C3Y

1.

Replace heater ON/OFF/START switch (WP 0737 00).

2.

Verify no faults found.

008900-6

Change 5