WINDSHIELD DEFROSTER CIRCUIT. (Cont) - TM-9-2350-238-20-10377

TM 9-2350-238-20-1

Step 4.

Disconnect other lead 639 from windshield defroster switch. Connect

multimeter to windshield defroster switch. Set windshield defroster switch

ON. If multimeter indicates 0 ohms, go to step 5. If multimeter indicates

infinity, replace windshield defroster switch. Refer to page 2-1073. Set

windshield defroster switch OFF. Connect leads.

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe this warning

could result in injury to personnel.

Step 5.

Disconnect lead 639 from windshield defroster disconnect. Place red probe

in lead 639. Ground black probe. Set MASTER switch ON. Set windshield

defroster switch ON. If multimeter indicates about 24 volts, go to step 6. If

multimeter indicates no voltage, repair lead ,639 between windshield

defroster switch and windshield defroster disconnect. Refer to page 2-371.

Set MASTER switch OFF. Set windshield defroster switch OFF. Connect

lead.

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