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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).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Continuity test.
Truck electrical system OK.
on Page 4-153
All other trailer lights operate.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Is continuity measured across
If lamp filament is faulty, light
taillight lamp?
will not operate.
Light lamp faulty.
Composite light faulty.
Wire 1008/21-29 faulty.
Replace light lamp
NO
Verify repair, go to
Step 12 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Voltage test.
Truck electrical system OK.
on Page 4-153
All other trailer lights operate.
Light lamp is OK.
REASON FOR QUESTION
Are 10 to 14 vdc measured on
If voltage is not supplied to
POSSIBLE PROBLEMS
center contact of taillight?
center contact of taillight, lamp
will not operate.
Composite light faulty.
Wire 1008/21-29 faulty.
Go to Step 5 of this
NO
Fault.
YES
4-152
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