Hey guys, Got a 2000 4x4 expy sometimes I wish I could turn on the rear ac to cool things down a bit without having to turn on the front ac unit. I know there has got to be a wire or something to splice together to make it think the front unit is on. Has anyone heard of this mod or better yet done it?

 

I think if you can accomplish this, you will freeze up the front evaporator pretty quickly.