1980 Window Problem

Before last winter we stored the black beauty in a climate controlled garage in NY. Right before we put it in storage, we had it washed at a car wash. As we were putting it into the garage we noticed the windows wouldnt go down. Were assuming its from the car wash, but what is it specifically? Is it electrical, a connection, a fuse, what? What do i need to do to fix it? How can i test different things to find out the exact problem? thanks guys.