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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)
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
4.
Voltage Test or
Towing vehicle blackout
STE/ICE-R Test #89
stoplights OK.
Is 12 VDC present at relay
REASON FOR QUESTION
Circuit breaker CB39 OK.
K27 terminal 86 on PDP?
Trailer electrical system OK.
If 12 VDC is not present,
Rear lights cable assembly OK.
wire 23 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable.
POSSIBLE PROBLEMS
Faulty dashboard cable
NO
assembly.
Faulty relay K27.
Repair wire 23 from relay K27 terminal 86 on
PDP to connector PX15 socket N (para 2-45)
YES
or replace WTEC II dashboard cable assembly
(para 7-10) or WTEC III dashboard cable
assembly (para 7-11).
KNOWN INFO
TEST OPTIONS
5.
Continuity Test or
Towing vehicle blackout
STE/ICE-R Test #91
stoplights OK.
Is continuity present from
REASON FOR QUESTION
Circuit breaker CB39 OK.
relay K27 terminal 85 on
Trailer electrical system OK.
If continuity is not present,
PDP to ground?
Rear lights cable assembly OK.
wire 3044 is faulty.
Rear intervehicular 24 VDC
(12 pin) cable.
POSSIBLE PROBLEMS
NO
Faulty dashboard cable
assembly.
Repair wire 3044 from K27 terminal
Faulty relay K27.
85 on PDP to terminal board TB2 position
YES
34 (para 2-45) or replace WTEC II dashboard
cable assembly (para 7-10) or WTEC III
dashboard cable assembly ( para 7-11).
Replace relay K27
(para 7-9).
2-830
Change 1
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