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Page Title:
BLACKOUT STOPLIGHT(S) DO NOT OPERATE. (Cont) |
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 TM 9-2330-385-14
7. BLACKOUT STOPLIGHT(S) DO NOT OPERATE (CONT).
4.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Continuity test.
on Page 4-89
All other trailer lights operate.
Blackout stoplight lamp OK.
REASON FOR QUESTION
24 vdc cable OK.
Is continuity measured
Connector MC15 OK.
If continuity is not measured on
Front junction box OK.
center contact and connector,
between center contact of
Wire 1678C-18 OK.
voltage cannot be supplied to
blackout stoplight socket and
Rear junction box OK.
light lamp.
connector?
POSSIBLE PROBLEMS
Blackout stoplight faulty.
Wire 1678/23-28 faulty.
Replace rear
composite light
NO
Verify repair, go to
Step 10 of this Fault.
YES
Go to Step 5 of this
Fault.
4-88.2
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