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I hooked up the wire to the alt battery terminal. Then I started getting 01 $ 02 oxy senser failure codes plus the random miss fire codes. Drove it a bout 10 miles, It tried to die several times and the idle would rev up and down. Then there was no throttle, I turned the key off then on It started all right and ran good for about a mile then started all over again.
I found out where the wire went. It is a ground wire that goes to the air compressor. The reason it was hot was it was feeding from the air compressor.