I have an 03 Expedition. The button or joystick for adjusting the position of the mirrors is off. When you push up it goes up, down is down and right is right but left becomes down. It happens to both the passenger and drivers side mirror. Ocasionally all directions work properly then it goes back to not working again. I've had the expy in last year for the reverse mirror TSB and they fixed it. Now I'm out of warranty though. Any ideas what it is?

 

I'd get a new switch. It is shorting and sending the wrong signal. If it was bad wires, it wouldn't adjust at all.