TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
20. ALL 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.
Step 7.
Set multimeter to 20 vdc scale. Connect red test lead to terminal (1) 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, disconnect batteries (page 2-424). Using
314-inch box-end wrench, unscrew and take off nut (2), lockwahser (3), and 14-6
wire (4). Clean wire terminals (5) using wire brush. Place 14-6 wire (4) in position
and screw nut (2) and lockwasher (3) on to terminal (1) and tighten using 3/4-inch
box-end wrench. Connect batteries (page 2-424).
b.
If multimeter reads 11 to 13 vdc, go to step 8.
Step 8.
Disconnect batteries (page 2-424). Using 1/2-inch open-end wrench, unscrew and take off nut (6),
lockwasher (7), and 14-6 wire (8). Set multimeter to ohms scale and adjust to 0 ohms. Connect red test
lead to wire terminal (9) and black test lead to terminal (1). Check for 0 ohms on multimeter. Disconnect
test leads.
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