TM-9-2320-366-20-1

M1083 SERIES, 5 TON, 6x6, MEDIUM TACTICAL VEHICLES (MTV)

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

FEBRUARY 2006

CHANGE 3

TM-9-2320-366-20-1 - Page 1384 of 1824

TM 9-2320-366-20-1

e68. TRAILER BLACKOUT MARKER LIGHTS DO NOT ILLUMINATE (CONT)

REASON FOR QUESTION

KNOWN INFO

Voltage Test or

STE/ICE-R Test #89

POSSIBLE PROBLEMS

WARNING

Read WARNING

on following page.

4.

Is 12 VDC present at relay

K29 terminal 86 on PDP?

Faulty dashboard cable

assembly.

Faulty relay K29.

Towing vehicle blackout marker

lights OK.

Circuit breaker CB42 OK.

Trailer electrical system OK.

Rear lights cable assembly OK.

Rear intervehicular 24 VDC

(12 pin) cable.

If 12 VDC is not present,

wire 1408 is faulty.

NO

Repair wire 1408 from relay K29 terminal 86 on

PDP to terminal board TB1 position 53 (para 2-45)

or replace WTEC II dashboard cable assembly

(para 7-10) or WTEC III

dashboard cable

assembly (para 7-11).

YES

TEST OPTIONS

KNOWN INFO

TEST OPTIONS

Continuity Test or

STE/ICE-R Test #91

REASON FOR QUESTION

POSSIBLE PROBLEMS

5.

Is continuity present from

relay K29 terminal 85 on

PDP to ground?

Faulty dashboard cable

assembly.

Faulty relay K29.

Towing vehicle blackout marker

lights OK.

Circuit breaker CB42 OK.

Trailer electrical system OK.

Rear lights cable assembly OK.

Rear intervehicular 24 VDC

(12 pin) cable.

If continuity is not present,

wire 3040 is faulty.

2-820

Change 1

NO

Repair wire 3040 from K29 terminal 85 on PDP

to terminal board TB2 position 20 (para 2-45) or

replace WTEC II dashboard cable assembly

(para 7-10) or WTEC III dashboard cable

assembly ( para 7-11).

YES

Replace relay K29 (para 7-9).