I wired mine up so that I could turn both fans on with a switch I mounted in my arm rest on the door. You have to run a wire to the ac fan, then jump a wire to the engine fan. You have to remove the fuse and put the wire on the two most left prongs, then jump the wire over and put it on the middle, or right prongs. I cant really remember. I wrote it down somewhere. Then connect it to a switch and voila. My switch is pretty cool, it lights up at night. I also installed a high flow fan where the old air box used to be. It sits between there and the ECU under the hood so that it blows on the filter. Its a 200CFM fan, so it blows pretty hard. Its weather proof and hooks up to the battery. I installed a switch for it as well. Then I mounted a thermometer near the air filter and saw temps drop from 180 degrees to 95 degrees (in the summer). My thermometer is reading in the 50 degree range now. God bless winter =o)