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Page Title:
REAR SIDE MARKER LIGHT(S) DO NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
2. REAR SIDE MARKER LIGHT(S) DO NOT OPERATE (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Continuity test.
on Page 4-37
All other trailer lights operate.
Rear junction box OK.
REASON FOR QUESTION
POSSIBLE PROBLEMS
If light lamp filament is faulty,
Is continuity measured across
lamp will not operate.
marker light lamp?
Light lamp faulty.
Rear side marker light faulty.
Wire 1012-26 faulty.
Replace rear side
marker light lamp
NO
Verify repair, go to
Step 7 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-37
All other trailer lights operate.
Rear junction box OK.
REASON FOR QUESTION
Light lamp OK.
Are 22 to 28 vdc measured on
If voltage is not supplied to
center contact of rear side
center contact of rear side
POSSIBLE PROBLEMS
marker light socket, marker light
marker light socket?
will not operate.
Rear side marker light faulty.
Wire 1012-26 faulty.
Go to Step 5 of this
NO
Fault.
YES
4-36
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