AIR BOX HEATER. (Cont) - TM-9-2350-238-20-10328

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.

Disconnect lead from air box heater fuel supply solenoid valve. Place red

Step 6.

probe in plug socket B (lead 480). Ground black probe. Set MASTER

switch ON. Hold PRIME ENGINE FUEL FILTERS/HEATER FUEL CYCLE

ON AND OFF switch ON. It multimeter indicates about 24 volts, notify

direct support maintenance. If multimeter indicates no voltage, repair lead

480 between PRIME ENGINE FUEL FILTERS/HEATER FUEL CYCLE ON

AND OFF switch and solenoid. Refer to page 2-371. Set MASTER switch

OFF. Release PRIME ENGINE FUEL FILTERS/HEATER FUEL CYCLE ON

AND OFF switch. Connect lead.

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