e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)
TM 9-2320-365-20-1
2-796 Change 1
CAUTION
Read CAUTION
on following page.
6.
TEST OPTIONS
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
KNOWN INFO
Towing vehicle blackout
stoplights OK.
Circuit breaker CB39 OK.
Trailer electrical system OK.
Relay K27 OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.
Is continuity present from
relay K27 terminal 87 on
PDP to connector J51
pin 8?
If continuity is not present,
wire 23T is faulty.
NO
YES
Repair wire 23T from relay K27
terminal 87 on PDP to connector J51
pin 8 (para 2-40) or replace WTEC II
dashboard cable assembly (para 7-10)
or WTEC III dashboard cable
assembly ( para 7-11).