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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.
2-302
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