[deadtrend1]

I bought a 30 amp 12v relay and a simple toggle switch from radio shack. Theres a diagram on the package for what wires go to what plug on it. Theres 4 wires to connect to it all together. I mounted it on the passenger side next to the radator, behind the headlight.

I know theres probably a better way to do it, but this was years ago with my limited knowledge. This way allowed the car to use the factory fan switch also. I used a relay to minimze the current running through the switch when the fan is running.

First, I tapped a wire onto the + side of the plug for the fan. Easy way to do that is to use a test light, turn the a/c on and see what one makes light go bright. That wire goes to the 12v out of the relay.

Next, Ran a fused wire from my positive lead of the battery, to the 12v in of the relay.

three, ground the relay. Fair enough explanation.

step three and a half: Run a wire from the low voltage input of the relay. to a switch inside the car. I also down the road put in a little LED lamp inline with the switch for ****s and giggles.

five: Ground the switch, LED, and wired the switch to a 12v ign source so the fan doesnt run when the ignition off.