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Page Title:
FRONT SIDE MARKER LIGHT DOES NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
1. FRONT SIDE MARKER LIGHT DOES NOT OPERATE (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Voltage test.
Truck electrical system OK.
on Page 4-125
All other trailer lights operate.
Light lamp is OK.
REASON FOR QUESTION
Are 10 to 14 vdc measured at
If voltage is not supplied to
POSSIBLE PROBLEMS
center contact of marker light?
center contact of marker light,
lamp will not operate.
Marker light faulty.
Wire 1012-24 faulty.
Wire 1435-23 faulty.
Go to Step 5 of this
NO
Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Continuity test.
on Page 4-125
All other trailer lights operate.
Light lamp OK.
REASON FOR QUESTION
Is continuity measured on
POSSIBLE PROBLEMS
If front side marker light ground
ground side of marker light
is faulty, light will not operate.
socket and a known good
Marker light faulty.
Wire 1435-23 faulty.
ground?
Replace front side
marker light
NO
Verify repair, go to
Step 7 of this Fault.
YES
4-124
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