TM-9-2320-366-20-1 MTV Unit Maintenance Manual M1083 Series - Volume 1 Download
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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