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Page Title:
STOPLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) |
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 TM 9-2330-385-14
15. STOPLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP) (CONT).
4.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Voltage test.
Truck electrical system OK.
All other trailer lights operate.
LED composite light OK.
REASON FOR QUESTION
Taillights operate, indicating
LED composite light ground
Are 10 to 14 vdc measured on
If 10 to 14 vdc are not present
(wire 1435) OK.
wire 1003C at rear junction
at wire 1003C, stoplights will
12 vdc cable assembly OK.
not operate.
box
Wire 1003-5 OK.
POSSIBLE PROBLEMS
Wire 1003C faulty.
Wire 1003C/22 faulty.
Go to Step 5 of this
NO
Diode assembly faulty.
Fault.
YES
Repair wire
1003C/22 (see
schematic, Fig
FO-1.1) or replace
composite light wire-
harness (Para 4-30.1).
Verify repair, go to
Step 6 of this Fault.
4-202.38
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