e66. TRAILER BLACKOUT STOPLIGHTS DO NOT ILLUMINATE (CONT)
TM 9-2320-365-20-1
2-798 Change 1
CAUTION
Read CAUTION
on following page.
7.
Is continuity present from
connector P51 socket 8
to connector P53R
socket 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.
Dashboard cable assembly OK.
Relay K27 OK.
POSSIBLE PROBLEMS
Faulty rear lights cable
assembly.
Faulty rear intervehicular
24 VDC (12 pin) cable.
NO
YES
Replace intervehicular
24 VDC cable (para 7-79).
Repair wire 23T from connector P51
socket 8 to connector P53R socket 6
(para 2-40) or replace rear lights
cable assembly (para 7-75).
If continuity is not present,
wire 23T is faulty. If
continuity is present,
intervehicular 24 VDC (12 pin)
cable is faulty.