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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).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
on Page 4-65
All other lights on trailer
operate.
REASON FOR QUESTION
Stoplight lamp OK.
Are 22 to 28 vdc measured on
If 22 to 28 vdc is not present on
center contact of stoplight
center contact of taillight socket,
POSSIBLE PROBLEMS
taillight will not operate.
socket?
Stoplight faulty.
24 vdc cable faulty.
Connector MC15 faulty.
Front junction box faulty.
Wire 1003-17 faulty.
Rear junction box faulty.
Wire 1004/22-30 faulty.
Go to Step 4 of this
NO
Fault.
YES
3.
KNOWN INFO
WARNING
TEST OPTIONS
Read WARNING
Truck electrical system OK.
on Page 4-65
Continuity test.
All other lights on trailer
operate.
REASON FOR QUESTION
Stoplight lamp OK.
Is continuity measured
24 vdc cable OK.
between stoplight socket
If stoplight ground is faulty, light
Connector MC15 OK.
will not operate.
ground and a known good
Front junction box OK.
Wire 1003-17 OK.
ground?
Rear junction box OK.
Wire 1004/22-30 OK.
POSSIBLE PROBLEMS
Stoplight faulty.
Replace rear
composite light
NO
Verify repair, go to
Step 10 of this Fault.
YES
Fault not corrected.
Notify supervisor.
4-64
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