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Page Title:
REAR MARKER LIGHT(S) DO NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
3. REAR MARKER LIGHT(S) DO NOT OPERATE (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Continuity test.
on Page 4-47
All other lights on trailer
operate.
REASON FOR QUESTION
Wire 1435-34 OK.
Is continuity measured across
If light lamp filament is faulty,
light lamp?
POSSIBLE PROBLEMS
lamp will not operate.
Light lamp faulty.
Rear marker light faulty.
Rear junction box
assembly faulty.
Wire 1012-31 faulty.
Replace rear marker
light lamp (Para 4-27).
NO
Verify repair, go to
Step 8 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-47
All other lights on trailer
operate.
REASON FOR QUESTION
Light lamp OK.
Wire 1435-34 OK.
Are 22 to 28 vdc measured on
If voltage is not supplied to
center contact of rear marker
center contact of rear marker
POSSIBLE PROBLEMS
light socket?
light socket, marker light will not
operate.
Rear marker light faulty.
Rear junction box
assembly faulty.
Wire 1012-31 faulty.
Go to Step 5 of this
NO
Fault.
YES
4-46
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