Thanks for the idea. I took the mirror out of the assy. The actuator makes the right sounds in all directions. It just doesn't move in-out.There is a chance that the motor mount point to the mirror just popped out of socket somehow (there is a socket on the back of the mirror and a ball on the mount that goes to the motor, one for up/down and one for left/right). Can you hear the motor in there running when you press the button? I got an extended view side view mirror for the drivers' side and when I put it in, I thought for sure I broke the motor. It took more force than I really expected to pop it back in, but has worked just fine since then.