SERVICE HEADLAMP CIRCUIT (LEAD 17). (Cont)

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Step 1.

Set MASTER switch OFF. Remove lamp from inoperative service

headlamp. Refer to page 2-601. Connect multimeter to the parallel lamp

terminals. If multimeter indicates about 1 ohm, install lamp in service

headlamp and go to step 2. If multimeter indicates infinity, replace lamp.

Make sure MASTER switch is OFF before repairing electrical

circuits. Failure to observe this warning could result in injury to

personnel.

Step 2.

To access line disconnect, remove transmission deck lid assembly. Refer

to page 2-938. Disconnect lead 17. Place red probe in lead 17. Ground

black probe. Press headlamp dimmer switch for high beam operation. Set

MASTER switch ON. Turn vehicular light switch to SER DRIVE. If

multimeter indicates about 24 volts, repair service headlamp assembly.

Refer to page 2-601. If multimeter indicates no voltage, repair lead 17 from

line disconnect to service headlamp. Refer to page 2-371. Set MASTER

switch OFF. Turn vehicular light switch OFF.

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