Not sure if you had a factory harness reworked, or what computer you have. I'm using a modded factory Fbody harness with factory computer. You can have it tuned to turn the fans on earlier. Also, there is an AC feed that you can hook to the blue wire on the VA harness for the compressor.. This will turn on the fans as soon as AC is turned on. Or use trinary switch as mentioned above.
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69 RS LS3/T56
68 firebird vert LS1/4L60E
67 RS LS2/T56
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