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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).
6.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-69
All other lights on trailer
operate.
REASON FOR QUESTION
Taillights operate indicating
Are 22 to 28 vdc measured on
LED composite light ground
If 22 to 28 vdc are not
is OK.
wire 1004C-8 at front junction
present at front junction box,
Stoplight lamp OK.
terminal 8, stoplight will not
box, terminal 8?
Stoplight OK.
operate.
LED composite light OK.
Ground wire 1435 OK.
24 vdc cable OK.
POSSIBLE PROBLEMS
Replace connector
Connector MC15 faulty.
MC15 (Para 4-30).
NO
Front junction box faulty.
Verify repair, go to
Wire 1003-17 faulty.
Step 10 of this Fault.
Rear junction box faulty.
Wire 1004/22-30 faulty.
YES
7.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-69
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.
front junction box at
front junction box terminal 17,
Stoplight lamp OK.
terminal 17?
stoplight will not operate.
Stoplight OK.
LED composite light OK.
Ground wire 1435 OK.
24 vdc cable OK.
Connector MC15 OK.
POSSIBLE PROBLEMS
Replace front junction
box (Para 4-25).
NO
Front junction box faulty.
Verify repair, go to
Wire 1003-17 faulty.
Step 10 of this Fault.
Rear junction box faulty.
Wire 1004/22-30 faulty.
YES
4-68
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