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Page Title:
TAILLIGHT(S) DO NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
4. TAILLIGHT(S) DO NOT OPERATE (CONT).
6.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-157
All other trailer lights operate.
Light lamp OK.
REASON FOR QUESTION
Composite light OK.
Are 10 to 14 vdc measured on
LED composite light ground
If voltage is not supplied to
wire pigtail OK.
wire 1008/21-29 at connector?
taillight on wire 1008/21-29,
taillight will not operate.
POSSIBLE PROBLEMS
Wire 1008/21-29 faulty.
LED composite light faulty.
Repair wire
1008/21-29 (see sche-
matic, Fig FO-1) or
replace side
NO
composite harness
Verify repair, go to
Step 12 of this Fault.
YES
If composite lights
are installed, fault not
corrected. Notify
supervisor, or
replace LED
composite lights.
Verify repair, go to
Step 12 of this Fault.
4-156
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