DRIVER'S HEATER CIRCUIT. (Cont) - TM-9-2350-238-20-10368

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe this warning

could result in injury to personnel.

Step 4.

Place red probe on pin E (lead 410). Place black probe on pin C (lead

401 ). Set MASTER switch ON. Set START-OFF-RUN switch to RUN. If

multimeter indicates 0 ohms, go to step 5. If multimeter indicates infinity,

replace driver's heater control box. Refer to page 2-1029. Set MASTER

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

Step 5.

Place red probe on pin E (lead 410). Place black probe on pin B (lead

402). Set HI-LO switch to Hl. If multimeter indicates 0 ohms, go to step 6.

If multimeter indicates infinity, replace driver's heater control box. Refer to

page 2-1029. Connect wiring harness.

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