ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
22. ONE BACKUP LIGHT DOES NOT WORK - CONTINUED.
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
Scrape painted surfaces to bare metal before connecting test leads to ensure correct multimeter
Steps 7 and 8 are for right backup light only.
Using number one cross-tip screwdriver, unscrew and take out four screws (1) and take off
terminal cover (2) from right taillight assembly (3). Check blue wire (4) for broken, frayed, or
a. If blue wire (4) is broken, blue wire (4) must be replaced. Notify Direct Support Maintenance.
b. If blue wire (4) is frayed, repair (page 2-424).
c. If blue wire (4) is corroded, pull wire terminal (5) off terminal (6) on right taillight assembly (3).
Clean wire terminal (5) and terminal (6) using wire brush and go to step 8.
d. If blue wire (4) is not broke, frayed, or corroded, go to step 8.
Set multimeter to 20 vdc scale. Connect red test lead to wire terminal (5) and black test lead to
ground. Have assistant start engine C(TM 5-3805-254-10) and put shift lever (7) in reverse (R)
position. Check for 11 to 13 vdc on multimeter. Have assistant put shift lever (7) in neutral (N)
position and shut down engine (TM 5-3805-254-10). Disconnect test leads.