I was wondering what I need to turn my cooling fan on without a toggle switch. My car has an electric fan and its not wired corectly. I want to get an aftermarket set up for it like the one Jegs offers from Flex-a-lite, PN 400-31147. I just dont know what all I would need to make this happen. I dont know if that switch needs to be hooked up to a realy or something like that or not. I just want some suggestions as what to do with it. I want it to turn the fan on at about 200 or maybe even 190 because it seems to run a little better when its cooler.

try this..

Thank you that helps alot but its the same for the ones with single fans right? Just take the secondary fan circuit out.

well with a single fan.. u just combine the two ciruits together. (all the a\c switches and stuff) into one ciruit.. but yes its pretty much the same..

when running a voltage like 12 volts and a current load of quite a few amps its always a good idea to use relays..