TRAILER RECEPTACLE BLACKOUT CIRCUIT. (Cont)

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.

Place red probe in socket F (lead 23). Ground black probe. Set MASTER

Step 3.

switch ON. Turn vehicular light switch to BO DRIVE. Apply brakes. If

multimeter indicates about 24 volts, go to step 4. If multimeter indicates no

voltage, repair lead 23. Refer to page 2-371. Set MASTER switch OFF.

Turn vehicular light switch OFF.

Make sure MASTER switch is OFF before repairing electrical

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

personnel.

Place red probe in socket A (lead 24A). Ground black probe. Set MASTER

Step 4.

switch ON. Turn vehicular light switch to BO MARKER. If multimeter

indicates about 24 volts, go to step 5. If multimeter indicates no voltage,

repair lead 24A. Refer to page 2-371. Set MASTER switch OFF. Turn

vehicular light switch OFF.

2-256