SERVICE BLACKOUT (INFRARED) HEADLAMP CIRCUIT (B0-1R AND VEHICULAR LIGHT SWITCHES) (Cont)

TM 9-2350-238-20-1

Make sure MASTER switch is OFF before repairing electrical

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

personnel.

Disconnect lead 520 from BO-IR switch. Place red probe in lead 520.

Step 2.

Ground black probe. Set MASTER switch ON. Turn vehicular light switch

to BO DRIVE. Set BO-IR switch to IR. If multimeter indicates about 24

volts, connect lead and go to step 3. If multimeter indicates no voltage,

repair lead 520 between BO-IR switch and vehicular light switch. Refer to

page 2-371. Set MASTER switch OFF. Turn vehicular light switch OFF.

Disconnect lead 514&51 5 and 520 from BO-IR switch. Place both probes in

Step 3.

switch. If multimeter indicates 0 ohms, go to step 4. If multimeter indicates

infinity, replace BO-IR switch. Refer to page 2-566. Connect leads.

2-259