Ive been wanting to hook up a relay so i can use a switch to control the radiator fan on my car. I'd like to somehow have high-off-low settings to choose from. Correct me if i'm wrong but i heard we had 2 speed fans,so tahts where the low/high settings came from. then have it set to turn off when the key is tuned off regardless of the switch position(just in case I get in a hurry and forget to turn it of after i ahve to park the car.) I have a set of autometer gauges(ultralights) that I'll be installing so i can accurately watch when i need to turn the fan on/off. I know I cant just wire a positive to the battery to a switch then to the fan then ground it off, taht will kill the fan. Can someone show me the correct way to wire this, or a kit I can buy(universal if nessicary) to splice into?