[Dug]

My wifes gone now with the hummer , so i cant go look yet. But do you have two wires going to the pos & neg of battery? Then one to a hot wire on the end of the brake switch. I think in the fuse box under the hood there is a blue wire that is just sitting there that needs to be plugged in to make the connection to the back of the truck. Does any of this sound familiar? doug