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Page Title:
ONE OR BOTH HEADLIGHTS (HIGH AND LOW BEAM) DO NOT ILLUMINATE |
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 TM 9-2320-366-20-1
INITIAL SETUP
Equipment Condition
Tools and Special Tools
Engine shut down (TM 9-2320-366-10-1).
Tool Kit, Genl Mech (Item 46, Appendix C)
STE/ICE-R (Item 41, Appendix C)
Personnel Required
Multimeter, Digital (Item 22, Appendix C)
(2)
References
TM 9-4910-571-12&P
START
KNOWN INFO
TEST OPTIONS
1.
Nothing.
Operational Test
POSSIBLE PROBLEMS
REASON FOR QUESTION
Does one headlight
This test eliminates possible
Faulty front lights cable
illuminate?
problems and determines
assembly.
where troubleshooting
Faulty main light switch.
continues.
Faulty dashboard cable
assembly.
NO
Faulty relay K8.
Faulty relay K7.
YES
Go to step 3 of this fault.
KNOWN INFO
TEST OPTIONS
2.
Operational Test
One headlight illuminates.
REASON FOR QUESTION
Main light switch OK.
Does left headlight
Dashboard cable
If LH headlight does not
illuminate?
assembly OK.
illuminate, wire 3052 is
Relay K8 OK.
faulty. If RH headlight
Relay K7 OK.
does not illuminate, wire
3051 is faulty.
POSSIBLE PROBLEMS
Faulty front lights cable
NO
assembly.
Repair wire 3052 from
connector P19 to terminal lug TL123
YES
(para 2-45) or replace front lights
cable assembly (para 7-82).
Repair wire 3051 from
connector P13 to terminal lug TL81
(para 2-45) or replace front lights
cable assembly (para 7-82).
Change 1
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