Parts failing while you use the car would be a warranty issue. Parts failing because a mechanic made a mistake is not a warranty issue. They definitely owe you a wire harness free of charge. your after market mods did not cause your harness to fry. cut and dry case. GET A LAWYER!
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want a piece of the yellow car? (buy it)
you have to beat the blue car first
and then you have to take on the IV
my favorite quote
"if the solution is simple, God is answering"