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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.
Step 4.
Disconnect the other lead 344 from AIR INTAKE FAN switch. Place red
probe in lead 344. Ground black probe. Set MASTER switch ON. Set AIR
INTAKE FAN switch ON. If multimeter indicates about 24 volts, go to step
5. If multimeter indicates no voltage, replace AIR INTAKE FAN switch.
Refer to page 2-1053. Set MASTER switch OFF. Set AIR INTAKE FAN
switch OFF. Connect lead.
Step 5.
Set MASTER switch ON. Set AIR INTAKE FAN switch ON. If indicator
light operates, go to step 9. if indicator light does not operate, go to step 6.
Set MASTER switch OFF. Set AIR INTAKE FAN switch OFF.
2-318

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