TM 9-2350-277-20-1
COOLANT HEATER MALFUNCTIONS—Continued
0089 00
F2Y
1. Measure voltage between harness 10943152 circuit 402B (1) on
terminal strip (2) and ground (switch on start).
2. Does multimeter read less than 17 volts?
YES
NO
F2YN
1. Replace harness 10943152
(WP 0382 00).
2. Verify no faults found.
F3Y
1. Faulty heater wiring. Beyond unit maintenance repair.
2. Notify supervisor.
GY
1. Is heater exhaust cold?
YES
NO
GYN
1. Replace flame detector switch
(WP 0734 00).
2. Verify no faults found.
G2Y
1. Loosen fuel inlet line (1) to heater with heater switch on start.
2. Does fuel fail to flow out of loosened fitting?
YES
NO
G2YN
1. Replace heater (WP 0728 00).
2. Verify no faults found.
0089 00-9
