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Page Title:
TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT) |
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 TM 9-2320-366-20-1
e68. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)
CAUTION
Read CAUTION
KNOWN INFO
TEST OPTIONS
on following page.
2.
Continuity Test or
Towing vehicle blackout marker
STE/ICE-R Test #91
lights OK.
Is continuity present from
Circuit breaker CB42 OK.
REASON FOR QUESTION
connector J130 sockets A,
Trailer electrical system OK.
C, and H to relay K29
This question eliminates possible
terminal 87?
POSSIBLE PROBLEMS
faults and determines where
troubleshooting continues.
Faulty dashboard cable
assembly.
Faulty relay K29.
Faulty rear lights cable
assembly.
NO
Faulty rear intervehicular
24 VDC (12 pin) cable.
YES
Go to step 6 of this fault.
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
3.
Voltage Test or
Towing vehicle blackout marker
STE/ICE-R Test #89
lights OK.
Is 24 VDC present at
REASON FOR QUESTION
Circuit breaker CB42 OK.
relay K29 terminal 30
Trailer electrical system OK.
If 24 VDC is not present,
on PDP?
Rear lights cable assembly OK.
wire 1958 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
NO
Faulty relay K29.
Repair wire 1958 from K29 terminal 30 on PDP
to circuit breaker CB42 terminal 4 (para 2-45)
YES
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
2-818
Change 1
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