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Page Title:
TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) |
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 TM 9-2330-385-14
15. TAILLIGHT DOES NOT OPERATE (S/N YB6122 075 AND UP) (CONT).
4.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Continuity test.
All other lights on trailer
operate.
REASON FOR QUESTION
LED composite light OK.
Wire 1435 OK.
Is continuity measured
If wire 1008B is faulty, voltage
Wire 1008B/21 OK.
across wire 1008B from diode
is not supplied to LED
assembly connector terminal
composite light.
11 to rear junction box?
POSSIBLE PROBLEMS
Wire 1008B faulty.
Wire 1008C faulty.
Repair wire 1008B
Diode assembly faulty.
(see schematic Fig
FO-1.1) or replace
trailer main wire
NO
harness (Para
4-30.1). Verify repair,
go to Step 6 of this
fault.
YES
4-118.26
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