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
terminals 16 (1) and 17 (2).
3. Does multimeter read 0 ohms?
YES
NO
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?
YES
NO
A4YN
1. Repair/replace faulty lead
(WP 0382 00) or (WP 0737 00).
2. Verify no faults found.
A5Y
1. Replace indicator light assembly (WP 0737 00).
2. Verify no faults found.
0089 00-4
