TM 5-3805-254-20.1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
23. BOTH HEADLIGHTS 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.
Step 22.
Test headlight beam selector switch (1) as follows: Pull apart wire connectors (2 and 3). Set
multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to wire terminal (4) and
black test lead to wire terminal (5). Check for O ohms on multimeter. Move black test lead to
wire terminal (6). Check for O ohms on multimeter. Disconnect test leads.
a.
If multimeter reads no continuity, on wire terminal (5) and wire terminal (6), replace headlight
beam selector switch (1) (page 2-742).
b.
If multimeter reads 0 ohms, on wire terminal (5) and wire terminal (6). Push wire connectors (2
and 3) together until locked and go to step 23.
Step 23.
Test wire connectors (2 and 3) as follows: Disconnect batteries (page 2-424). Set multimeter to
ohms scale and adjust to 0 ohms. Connect red test lead to red wire (7) on wire connector (2) and
black test lead to 51 wire (8) on wire connector (3). Check for 0 ohms on multimeter. Move red
test lead to brown wire (9) on wire connector (2) and move black test lead to 52 wire (10) on wire
connector (3). Check for 0 ohms on multimeter.
2-186
