TM 9-2350-261-20-1
1. Install heater harness plug on heater control box
jack.
2. Remove heater harness plug (1) from heater
jack (2).
3. Measure voltage between plug (1) pin C (3) and
ground. With HEATER switch on START.
4. Does multimeter read at least 17 volts?.
1. Replace coolant heater (page 32-49).
2. Verify no faults found.
1. Remove heater control box (page 32-42).
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?
1. Faulty coolant heater
harness.
2. Notify your supervisor.
1. Repair faulty lead
(page 14-3).
2. Verify no faults found.
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