TM-9-2320-365-20-1

M1078 SERIES, 2 1/2-TON, 4 X 4, LIGHT MEDIUM TACTICAL VEHICLES (LMTV)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; UNIT MAINTENANCE; VOLUME NO. 1 OF 5

FEBRUARY 2006

CHANGE 3

TM-9-2320-365-20-1 - Page 1194 of 1760

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.