TM 9-2320-273-20
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2
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5
6
Table 5-8. Headlamp Circuit Troubleshooting
INSTRUCTION
INDICATION
YES
NO
BOTH HEADLAMPS BLINK ON AND OFF
NOTE
A short in the headlamp circuit is causing
the circuit breaker to
ONE HEADLAMP IS INOPERATIVE.
Remove the lamp and
12 volts dc nominal.
check for voltage at
the lamp socket with
multimeter.
BOTH HEADLAMPS ARE INOPERATIVE.
Check blackout lamp
switch position.
Check for voltage at
dimmer switch ter-
minal (circuit 26B)
using multimeter.
Check for voltage at
lamp switch (circuit
26) terminal.
Check for voltage at
lamp switch (circuit
10D) terminal.
Troubleshoot wiring.
Check circuit breaker
in headlamp switch.
12 volts dc nominal.
Fig. 5-32.
12 volts dc nominal.
12 volts dc nominal.
Continuity.
cycle.
Replace
lamp
(para 5-44).
Replace
(para 5-57).
Check cir-
cuit 26
wiring.
Replace
switch
(para 5-62).
Trouble-
shoot wiring
Repair
ground
connection
at lamp.
Go to
Step 3.
Go to
Step 4.
Go to
Step 5.
Replace
headlamp
switch.
REMARKS
5-46
