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 1224 of 1824

e55. BACKUP LIGHT DOES NOT ILLUMINATE

TM 9-2320-366-20-1

2-670

Change 1

NOTE

Perform Electrical System Troubleshooting

e1. Circuit Breaker Does Not Operate on

circuit breakers CB70 and CB73 prior to

beginning this task.

START

1.

Is continuity present

through both backup

light lamps?

KNOWN INFO

Circuit breaker CB70 OK.

Circuit breaker CB73 OK.

Both turn signals illuminate.

Engine starts.

Transmission reverse (R)

range OK.

POSSIBLE PROBLEMS

Faulty backup light lamps.

Faulty backup light

assembly.

Faulty dashboard cable

assembly.

Faulty WTEC II cab

transmission harness.

Faulty rear lights cable

assembly.

Faulty REVERSE

WARNING relay in WTEC

II VIM.

Faulty WTEC II

transmission ECU

pushbutton shift selector.

Faulty WTEC III relay K25.

Faulty WTEC III

transmission ECU.

TEST OPTIONS

Continuity Test or

STE/ICE-R Test #91

REASON FOR QUESTION

If continuity is not present,

one or both backup light

lamps are faulty.

NO

Replace backup light

lamp(s) (para 7-36).

YES

INITIAL SETUP

Equipment Conditions

Engine shut down (TM 9-2320-366-10).

Batteries disconnected (para 7-57).

Tools and Special Tools

Tool Kit, Genl Mech (Item 46, Appendix C)

STE/ICE-R (Item 41, Appendix C)

Multimeter, Digital (Item 22, Appendix C)\

Materials/Parts

Packing, Preformed (Item 209, Appendix G)

Wire, Electrical , 50 ft (Item 71, Appendix D)

Personnel Required

(2)

References

TM 9-4910-571-12&P