Originally Posted by kenny's 370z

its simple.the black wire on both fans coming out of the fan motors (the drivers side is tight to work with),peel back some rubber coating off of both wires.tie them in together and tape up accordingly.then run the wire into the cabin.i put a inline 40 amp fuse on it just in case.once the wire from your fans are in the cabin and hooked up to a 50a switch,simply ground it out on a seat bolt on the floor.now the fans will come on when you have the car on but they will not come on with the car off.you will have to take the overflow tank out or just move it over out of the way to do the drivers side cause the wire is very short from where it goes to the relay to the fan motor..
you will need;

one fuse holder with 12 awg wire and fuse
around 24ft of 12 awg wire
one 50a toggle switch(2 prong,not 3)

i will mount the switch tomorrow in one of the blanks by the cup holder.i had it laying in the seat tonight testing to see how it worked before mounting it.hope you have some patience cause you're going to need it.make sure to keep the switch off when you are running the ac.