Very easy install. Just need one switch and two wires.

Run one wire from switch to ground. Run other wire from switch 'on position' to pin 85.

Turn your key far enough to turn on intercooler pump, then flip switch, and your radiator fan will start up.

I was in a hurry so I put the switch under the hood, you can also put the switch on your dash. Its a negative trigger, so there are no hot wires to deal with.

 

I do very similar thing with my Jeep; has a temp sensor inside the top radiator hose and just run wire from one side to the other, turn ignition on, and the dual electric fans keep running......very nice.

 

Thanks polkthug!