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Page Title:
STOPLIGHT DOES NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
5. STOPLIGHT DOES NOT OPERATE (CONT).
5.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-67
All other lights on trailer
operate.
REASON FOR QUESTION
Taillights operate indicating
Are 22 to 28 vdc measured at
LED composite light ground
If 22 to 28 vdc are not present
terminal B and D on trailer
is OK.
at 24 vdc cable, terminal B, light
end of 24 vdc cable?
Stoplight lamp OK.
will not operate.
Stoplight OK.
LED composite light OK.
Ground wire 1435 OK.
POSSIBLE PROBLEMS
24 vdc cable faulty.
Replace 24 vdc cable.
Connector MC15 faulty.
NO
Verify repair, go to
Front junction box faulty.
Step 10 of this Fault.
Wire 1003-17 faulty.
Rear junction box faulty.
Wire 1004/22-30 faulty.
YES
4-66.4
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