DRIVER'S HEATER CONTROL BOX LIGHT CIRCUIT. (Cont)

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Step 3.

Disconnect lead 10 from 20A circuit breaker. Connect multimeter to 20A

circuit breaker receptacles. If multimeter indicates 0 ohms, repair lead 10.

Refer to page 2-371. If multimeter indicates infinity, replace 20A circuit

breaker. Refer to page 2-1029. Connect leads.

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe this warning

could result in injury to personnel.

Step 4.

Disconnect lead 400 from driver's heater control box. Place red probe in

lead 400. Ground black probe. Set MASTER switch ON. If multimeter

indicates about 24 volts, replace driver's heater control box. Refer to page

2-1029. If multimeter indicates no voltage, repair lead 400 between 20A

circuit breaker and driver's heater control box. Refer to page 2-371. Set

MASTER switch OFF. Connect lead.

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