'99 Tacoma w/lift

I'm having wiring harness trouble. My dash lights light up with my brake lights as well as the left signal. Is there a video on the easiest way to change the harness going to the back? I found that a foot or so back from where it comes out under the box along the frame where it got hot at one time and melted some of the wires together. Thanx all.

 

May be better off just cutting out the bad section and peel back enough of the sheathing to splice in new section. Don't forget the heat shrink. Lots of it. Get some big heat shrink that'll cover all of the wiring after you've spliced and heat shrinked the individual wires. Then heat shrink all the wires together. Then get some of that split ridged covering and put on there.

 

Probably the easiest I guess.
Thanx

 

Check some online stores like 'Painless Wiring'. They may offer something, may not. They mostly do engine swaps, hot rods, and classics.