Moonroof Runaway

1993 Seville w/ 225,000 miles is rejecting parts at a frequent rate. Most are easy, sort of.... But this last event is driving me nutts. Moonroof keeps cycling open to close to up and repeat every time I touch the select button. By playing with it a little bit I can get it to stop in the closed position. Just about the time I start patting myself on the back, and turn off the Ign. SW. It cycles open and the stops.
Motor is working just fine, I'm thinking the SW...... Any ideas?