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Page Title:
TAILLIGHT DOES NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
4. TAILLIGHT DOES NOT OPERATE (CONT).
5.
KNOWN INFO
WARNING
TEST OPTIONS
Read WARNING
Truck electrical system OK.
on Page 4-59
Voltage test.
All other lights on trailer
operate.
REASON FOR QUESTION
Taillight lamp OK.
Are 22 to 28 vdc measured on
Taillight OK.
rear junction box at
If voltage is not supplied to rear
LED composite light OK.
junction box terminal 29, rear
LED composite light ground
terminal 29?
junction box is faulty. If voltage
wire pigtail OK.
is supplied to rear junction box
terminal 37, wire 1008/21-29 is
POSSIBLE PROBLEMS
faulty.
Rear junction box faulty.
Wire 1008/21-29 faulty.
Replace rear junction
box assembly
NO
Verify repair, go to
Step 6 of this Fault.
YES
Repair wire
1008/21-29
(see schematic,
Fig FO-1) or replace
composite light
harness (Para 4-30).
Verify repair, go to
Step 6 of this Fault.
4-58.4
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