AIR BOX HEATER. (Cont) - TM-9-2350-238-20-10326

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 480 from purge and PRIME ENGINE FUEL FILTERS/

Step 4.

HEATER FUEL CYCLE ON AND OFF switch. Place red probe in lead 480.

Ground black probe. Set MASTER switch ON. If multimeter indicates

about 24 volts, go to step 5. If multimeter indicates no voltage, repair lead

480 between circuit breaker and PRIME ENGINE FUEL FILTERS/HEATER

FUEL CYCLE ON AND OFF switch. Refer to page 2-371. Set MASTER

switch OFF. Connect lead.

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