TM 3-4230-209-30&P
2-18
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 8. Check wire No. 12 for continuity using the following procedures:
a. Cut splice from wire No. 12 near the thermostatic switch S1.
b. Use multimeter to check continuity between ends of wire No. 12 and switch S4-1 while wire is being flexed along its entire length
Strip end of wire and replace new splice if continuity is indicated.
Replace wire No. 12 from switch S4-1, and splice area near the thermostatic switch S1 if anything other than continuity is measured.
Restrip wires and replace splice.