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Page Title:
TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT) |
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 TM 9-2320-366-20-1
e69. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)
CAUTION
Read CAUTION
KNOWN INFO
TEST OPTIONS
on following page.
2.
Continuity Test or
Towing vehicle blackout
STE/ICE-R Test #91
stoplights OK.
Is continuity present from
Circuit breaker CB39 OK.
REASON FOR QUESTION
connector J130 socket F
Trailer electrical system OK.
This question eliminates
to relay K27 terminal 87?
POSSIBLE PROBLEMS
possible problems and
determines where
Faulty dashboard cable
troubleshooting continues.
assembly.
Faulty relay K27.
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
STE/ICE-R Test #89
stoplights OK.
Is 24 VDC present at
REASON FOR QUESTION
Circuit breaker CB39 OK.
relay K27 terminal 30
Trailer electrical system OK.
If 24 VDC is not present,
on PDP?
Rear lights cable assembly OK.
wire 1959 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
NO
Faulty relay K27.
Repair wire 1959 from K27 terminal 30 on PDP
to circuit breaker CB39 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).
2-828
Change 1
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