AIR BOX HEATER CIRCUIT. (Cont) - TM-9-2350-238-20-10322

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.

To access air box heater fuel pump motor, remove hull engine compartment

Step 6.

deck assembly lid. Refer to page 2-935. Disconnect lead 76A from air box

heater fuel pump motor. Place red probe in lead 76A. Ground black probe.

Set MASTER switch ON. Hold PUMP AND HEATER IGNITER switch ON.

If multimeter indicates about 24 volts, notify direct support maintenance. If

multimeter indicates no voltage, repair lead 76A between air box heater fuel

pump motor and engine disconnect. Refer to page 2-371. Release PUMP

AND HEATER IGNITER switch. Set MASTER switch OFF. Connect lead.

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