TM 9-2350-277-20-1COOLANT HEATER MALFUNCTIONS—Continued 0089 00F2Y1. Measure voltage between harness 10943152 circuit 402B (1) onterminal strip (2) and ground (switch on start).2. Does multimeter read less than 17 volts?YESNOF2YN1. Replace harness 10943152(WP 0382 00).2. Verify no faults found.F3Y1. Faulty heater wiring. Beyond unit maintenance repair.2. Notify supervisor.GY1. Is heater exhaust cold?YESNOGYN1. Replace flame detector switch(WP 0734 00).2. Verify no faults found.G2Y1. Loosen fuel inlet line (1) to heater with heater switch on start.2. Does fuel fail to flow out of loosened fitting?YESNOG2YN1. Replace heater (WP 0728 00).2. Verify no faults found.0089 00-9
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