TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
22. ONE BACKUP LIGHT DOES NOT WORK - CONTINUED.
WARNING
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
equipment.
NOTE
Scrape painted surfaces to bare metal before connecting test leads to ensure correct multimeter
readings.
Steps 9 and 10 are for right backup light.
Step 9.
Using number one cross-tip screwdriver, unscrew and take out four screws (1) and take off
terminal cover (2). Set multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to
wire terminal (3) and black test lead to wire terminal (4) on blue wire (5). Check for 0 ohms on
multimeter. Disconnect test leads.
a.
If multimeter reads no continuity, blue wire (5) must be replaced. Notify Direct
Support Maintenance.
b.
If multimeter reads 0 ohms, put terminal cover (2) on left stoplight/ taillight assembly
(6). Screw in four screws (1) and tighten using number one cross-tip screwdriver and
go to step 10.
Step 10.
Set multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to terminal (7) and
black test lead to stud (8). Check for 0 ohms on multimeter. Disconnect test leads.
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