4Runner Rear Window gone?

So here it is.

I know about the rear window problems and all of that excitement. I pulled it apart this morning to clean the tracks, and clean it all up. It ran welll for about 4 or 5 times up and down. After all of this I decided to wash the rear end. To my amazement after washing it, and then backing it down the driveway the window was gone!!! So I jumped out, and it had rolled down on its own. Weird stuff. Was it a water short? Is there a fuse? All I get now is a little click when I hit the button.

Any help would be great. It is a 90 4Runner with high miles.

Played around with it some more, but no luck. It is the strangest thing as it was running so well. New motor time? Do the wiring or switches fail that often?

Thanks

Pedro