TM 9-2350-247-20-1
VEHICLE COMPARTMENT HEATER MALFUNCTIONS—Continued
0085 00
3DY
1. Replace heater RUN-OFF-START switch (WP 0472 00).
2. Verify no faults found.
EY
1. Remove heater harness plug (1) from heater control jack (2).
2. With RUN-OFF-START switch in START, measure voltage
between heater control jack (2) pin A (3) and ground.
3. Does multimeter read 17 volts or more?
YES
NO
GO TO FY (PAGE 0085 00-8)
2EY
1. Install heater harness on heater control box jack.
2. Remove heater harness circuit 402 plug (1) from heater fuel pump
jack (2).
3. With RUN-OFF-START switch in START, measure voltage
between heater harness plug pin (1) and ground.
4. Does multimeter read 17 volts or more?
YES
NO
2EYN
1. Faulty control box to fuel pump
harness circuit 402.
2. Notify your supervisor.
0085 00-7
