COOLANT HEATER CIRCUIT. (Cont) - TM-9-2350-238-20-10356

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Step 2.

Place red probe on pin C (lead 401). Ground black probe. Set START-

OFF-RUN switch to START. If multimeter indicates about 24 volts, go to

step 3. If multimeter indicates no voltage, replace coolant heater control

box. Refer to page 2-1056. Set START-OFF-RUN switch OFF. Connect

wiring harness.

Step 3.

Place. red probe on pin A (lead 402R). Ground black probe. Set START-

OFF-RUN switch to START, then to RUN. If multimeter indicates about 24

volts in both switch settings, go to step 4. If multimeter indicates no voltage

in both switch settings, replace coolant heater control box. Refer to page

2-1056. Set START-OFF-RUN switch OFF. Connect wiring harness.

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