FUEL PUMP AND IGNITION DRIVE MOTOR WILL NOT START WITH HEATER CONTROL SWITCH IN HEATER ON POSITION (CONT).

TM 3-4230-209-30&P

2-14

TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

WATER HEATER (CONT)

4. FUEL PUMP AND IGNITION DRIVE MOTOR WILL NOT START WITH HEATER CONTROL SWITCH IN HEATER ON POSITION (CONT).

Step 4. Check wire No. 19 for continuity using the following procedures:

a. Remove thermal delay relay tube TD1 from its socket. Disconnect wire No. 19 from relay K2-A2.

b. Use a multimeter to check for continuity between ends of wire while it is being flexed. Stick one multimeter probe into thermal delay relay tube

TD1 socket, hole 5, and the other multimeter probe to end of wire No. 19.

Reinstall wire No. 19 back onto relay K2-A1 if conti-

nuity is indicated, and reinstall thermal delay relay

tube TD1 .

Replace wire No. 19 in socket base of TD1 at hole 5

and attach to relay K2-A2, if anything other than

continuity is indicated. Reinstall thermal delay relay

tube TD1 into its socket.