its vacuum controlled. look at the thin vacuum line running into the firewall by the intake. the ac is probably a ground. the ac in your jeep is super easy to take apart and work on, i have had mine out a few times for cleaning and doing minor things (like fixing when i put a screw through one of hte tubes)
A cowardly leader is the most dangerous of men- Stephen King.
"Just because something isn't a lie does not mean that it isn't deceptive. A liar knows that he is a liar, but one who speaks mere portions of truth in order to deceive is a craftsman of destruction". --I am not sure who said this but it properly describes our president.