BACKUP LIGHT DOES NOT WORK.

TM 9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

22. BACKUP LIGHT DOES NOT WORK.

Step 1.

Put clearance light switch (1) in ON position, and make sure blackout switch (2)

is in LIGHTS position.

If clearance lights do not work, go to step 5.

Step 2.

Put clearance light switch (1) in OFF position. Make sure parking brake is

applied (TM 9-2320-270-10). Put transmission shift control (3) in reverse posi-

tion (R). Put key in ON position. Using multimeter set at 30 vdc, put red probe

on backup light switch terminal (4) and black probe on housing (5). Take read-

ing and put key in OFF position.

If meter reads no voltage, go to step 4.

Step 3.

Put transmission shift control (3) in neutral position (N). Remove backup light

lamp (6) (page 4-325). Using multimeter set at RX1, put probes on contact (7)

and lamp housing (8).

If meter does not read zero, replace lamp (6) (page 4-325).

TA239649

3-61