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 1246 of 1824

e55. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)

TM 9-2320-366-20-1

2-692

Change 1

KNOWN INFO

REASON FOR QUESTION

TEST OPTIONS

12.

POSSIBLE PROBLEMS

Faulty WTEC III relay K25.

Faulty WTEC III dashboard

cable assembly.

Faulty rear lights cable

assembly.

Faulty WTEC III

transmission ECU.

Continuity Test or

STE/ICE-R Test #91

Is continuity present from

WTEC III relay K25

terminal 86 to terminal 85?

If continuity is not present,

WTEC III relay K25 if

faulty.

Circuit breaker CB70 OK.

Circuit breaker CB73 OK.

Both turn signals illuminate.

Engine starts.

Transmission reverse (R)

range OK.

Backup light lamps OK.

Backup light assembly OK.

WTEC III transmission controls.

NO

Replace WTEC III

relay K25 (para 7-9).

YES