I have triple checked the wires and they are hooked up correctly. The problem is when on left mirror the right moves up and left at the same time the left one moves up and left, then on right mirror it will only move up and left, when you move right and down the dome lights dim some. I had the non power tow mirrors on since December, but I'm sure the small power mirrors worked fine then. I can see how the left and right could move at same time. I got a different switch and it still did it, no change. And if there is messed up wires in the cab some where, I still don't see how the right could be affected by the left one, I figure the wires for the left never leave the door, maybe not??? Help please, I'm to the hammer throwing point!!!