TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
21. BOTH BACKUP LIGHTS DO 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.
Junction box has 12 terminals.
Step 14.
Disconnect batteries (page 2-424). Set multimeter to ohms scale and adjust to 0 ohms. Position
locator hole (1) on wire connector (2) at 12 o’clock. Connect red test lead to terminal (3) on wire
connector (2) and black test lead to terminal (4) on junction box (5). Check for 0 ohms on
multimeter. Disconnect test leads.
If multimeter reads no continuity, wire connector (2) must be replaced. Notify Direct
Support Maintenance.
2-156
