I have a question about hooking up a wire on my electric fan controller. I am using a hayden 3654 dual fan dual speed controller. There is a green wire that would normally go to the AC compressor to turn on the fans when the AC comes on. My car doesn't have AC and it says you can use this wire on a switch as a fail safe to be able to turn the fans on manually. My question is when the AC comes on does the green wire that comes out of the compressor complete a ground circuit or is it powered. So I guess what I am asking is do I run it through a switch to ground or power.