you can also check the factory sensors on the thermostat housing and look for the 12v source (at full temp) and run a basic bosch style relay to activate the fans. I did this to my car.
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1991 Toyota Supra 580rwhp617TQ
11.80@117MPH Under Construction
1992 Honda Prelude 400Hp ??TQ
14.0@ 114MPH Time for Update
2007 Cadilliac Escalade daily
Knowledge Is Power...................
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