TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

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.

Continuity Test or

Towing vehicle blackout marker

STE/ICE-R Test #91

lights OK.

Is continuity present from

REASON FOR QUESTION

Circuit breaker CB42 OK.

connector P51 socket 10

Trailer electrical system OK.

If continuity is not present,

to connector P53R

Dashboard cable assembly OK.

wire 484T is faulty. If

sockets 7 and 9 and pin 10?

Relay K29 OK.

continuity is present,

intervehicular 24 VDC (12 pin)

POSSIBLE PROBLEMS

cable is faulty.

Faulty rear lights cable

assembly.

Faulty rear intervehicular

24 VDC (12 pin) cable.

Repair wire 484T from connector P51socket 10 to

connector P53R socket 7 or 9 or pin 10 (para 2-45)

or replace M1083/M1084/M1085/M1090/M1090/

YES

M1092/M1093/M1094 rear lights cable assembly

(para 7-84) or M1086/M1088/M1089 rear lights

cable assembly (para 7-104).

Replace intervehicular

24 VDC cable (para 7-129).

2-824

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