TM 9-2350-277-20-1
COOLANT HEATER MALFUNCTIONSContinued
0089 00
DY
1. Remove harness 10943141 plug (1) from heater control jack (2).
2. Measure voltage between heater control jack (2) pin A (3) and
ground with HEATER switch on START.
3. Does multimeter read 17 volts or more?
YES
NO
GO TO EY (PAGE 0089 00-8)
D2Y
1. Install harness 10943141 on heater control box jack.
2. Remove harness 10943141 plug (1) from heater fuel pump jack
(2).
3. Measure voltage between harness 10943141 plug (1) pin and
ground with HEATER switch on START.
4. Does multimeter read 17 volts or more?
YES
NO
D2YN
1. Replace harness 10943141 circuit
402 (WP 0382 00).
2. Verify no faults found.
D3Y
1. Replace coolant heater fuel pump (WP 0731 00).
2. Verify no faults found.
0089 00-7