TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
24. ONE HEADLIGHT DOES NOTWORK - 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.
Step 5. Test headlight harness (1) as follows: Set multimeter to ohms scale and adjust to 0 ohms. Connect red test lead
to wire terminal (2) on wire connector (3) and black test lead to wire terminal (4) on wire connector (5). Check for
0 ohms on multimeter. Move red test lead to wire terminal (6) on wire connector (3) and black test lead to wire
terminal (7) on wire connector (5). Check for 0 ohms on multimeter. Disconnect test leads.
a.If multimeter reads no continuity on wire terminals (4 or 7), headlight harness (1) must be replaced. Notify
Direct Support Maintenance.
b.If multimeter reads 0 ohms, install headlight (page 2-807) and go to step 6.
Step 6. Test 11 wire (8) as follows: Disconnect batteries (page 2-424). Unscrew and take off wingnuts (9) and junction
box cover (10). Connect red test lead to wire terminal (11) on wire connector (12) and black test lead to terminal
(13) on junction box (14). Check for 0 ohms on multimeter. Disconnect test leads.
a.
If multimeter reads no continuity 11 wire (8) must be replaced. Notify Direct Support Maintenance.
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