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My name is Jim. You need to find a shop that can do this type of diagnostic work. Sounds like he is lost and just throwing parts at your vehicle. In most case you DO NOT need a wiring harness. If it has shorts then that means you are blowing fuses. How many fuse are you blowing? It will take a person with experience, a good wiring diagram and knowledge how you system works. They will find the problem. Jim
Needs to be in Jeep Category ...
Said you responded to me but I see not text