TM 3-4230-209-30&P
2-8
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WATER HEATER (CONT)
3. FUEL PUMP AND IGNITION DRIVE MOTOR DOES NOT OPERATE IN PURGE ON POSITION.
Step 1. Check wire No. 18 for continuity using the following procedures:
a. Disconnect wire No. 18 from relay K1-A1, and disconnect other end from the
fuel pump and ignition drive motor (1).
b. Use multimeter to check continuity between ends of wire No. 18 while flexing the
entire length of the wire.
Reinstall wire No. 18 if continuity is indicated.
Replace wire No. 18 if defective.