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 10.
Test 14-8 wire (1) as follows: Using 1/2-inch open-end wrench, unscrew and take off nut (2),
lockwasher (3), and wire terminal (4) on primary magnetic switch (5). Set multimeter to ohms
scale, and adjust to 0 ohms. With assistant, connect red test lead to wire terminal (4) on 14-8
wire (1) and black test lead to terminal (6) on secondary magnetic switch (7). Check for 0 ohms
on multimeter. Disconnect test leads.
a. If multimeter reads no continuity, 14-8 wire (1) must be replaced. Notify Direct Support
Maintenance.
b.
If multimeter reads 0 ohms, place wire terminal (4) in position and screw nut (2) and
lockwasher (3) on to terminal (8) on primary magnetic switch (5) and tighten using
1/2-inch open-end wrench. Connect batteries (page 2-424). Install instrument panel
pad (page 2-424).
Step 11.
Set multimeter to 20 vdc scale. Connect red test lead to terminal (9) on starter motor (10) and
black test lead to ground. Check for 11 to 13 vdc on multimeter. Disconnect test leads.
a. If multimeter does not read 11 to 13 vdc, go to step 12.
b. If multimeter reads 11 to 13 vdc, go to step 13.
2-176
