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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).
8.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-71
All other lights on trailer
operate.
REASON FOR QUESTION
Taillights operate indicating
LED composite light ground
Are 22 to 28 vdc measured on
If wire 1003-17 is faulty,
is OK.
wire 1003-17 at rear junction
stoplight will not operate.
Stoplight lamp OK.
box, terminal 17?
Stoplight OK.
LED composite light OK.
Ground wire 1435 OK.
24 vdc cable OK.
Connector MC15 OK.
Front junction box OK.
Repair wire 1003-17
(see schematic,
POSSIBLE PROBLEMS
Fig FO-1) or replace
NO
left composite light
Wire 1003-17 faulty.
harness (Para 4-30).
Rear junction box faulty.
Verify repair, go to
Wire 1004/22-30 faulty.
Step 10 of this Fault.
YES
9.
KNOWN INFO
WARNING
TEST OPTIONS
Read WARNING
Truck electrical system OK.
on Page 4-71
Voltage test.
All other lights on trailer
operate.
REASON FOR QUESTION
Taillights operate indicating
LED composite light ground
Are 22 to 28 vdc measured on
If 22 to 28 vdc are not present at
is OK.
rear junction box at
rear junction box, terminal 30,
Stoplight lamp OK.
rear junction box is faulty. If
terminal 30?
Stoplight OK.
there are 22 to 28 vdc present
LED composite light OK.
at terminal 30, wire 1004/22-30
Ground wire 1435 OK.
is faulty.
24 vdc cable OK.
Connector MC15 OK.
Front junction box OK.
Wire 1003-17 OK.
Replace rear junction
box (Para 4-26).
POSSIBLE PROBLEMS
NO
Verify repair, go to
Step 10 of this Fault.
Rear junction box faulty.
Wire 1004/22-30 faulty.
YES
Repair wire 1004/
22-30 (see schematic,
Fig FO-1) or replace
composite light
harness (Para 4-30).
Verify repair, go to
Step 10 of this Fault.
4-70
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