TRAILER WIRING HARNESS - TEST/REPLACE/REPAIR.
This Task Covers:
Test and Repair
Tool Kit, General Mechanic's: Automotive (Appendix B, Section III, Item 1).
Multimeter (Appendix B, Section III, Item 2).
Tags (Appendix E, Section II, Item 17).
Tape, Electrical (Appendix E, Section II, Item 18).
Unit shut down and cool.
Removal. (Refer to Figure 5-29.)
Tag and disconnect wires from ending points in voltage reducer box (1).
Tag and disconnect plugs from lights and markers.
Remove nine screws (2), nine lock-nuts (4) and nine cable clamps (5) along with trailer wiring harness (6) from
Test and Repair.
Prevent electrical shocks or burns. DO NOT wear jewelry or dog tags when
working on electrical components.
Using a multimeter, Check individual wires for continuity according to wiring diagram.
Replace wires having no continuity. Determine proper size and length of wire, or terminal, or connector to be
used for replacement by reading the wire chart.
Replace wires by matching tags at lights and markers and at voltage reducer box (1).
Slide nine cable clamps (5) over trailer wiring harness (6). Align holes in frame (7) up with holes in cable clamps
(5) and install nine screws (2) through holes in frame (7) and holes in cable clamps (5). install nine lock-nuts (4).