93 W/ a Moonroof that keeps mooving

I thought by now the MoonRoof would get tired and quit, but no luck. Glass keeps cycling through all open positions and then stops in half open position.
Any suggestions? I'm thinking switch but maybe there is a sensor somewhere in the track?

Thanks in advance

I thought by now the MoonRoof would get tired and quit, but no luck. Glass keeps cycling through all open positions and then stops in half open position.
Any suggestions? I'm thinking switch but maybe there is a sensor somewhere in the track?

Thanks in advance

After cutting back the roof with a P38 and checking the wires it became clear the problem was in the switch. I replaced the moon-roof switch with a main gear landing toggle switch out of an old F8U-2NE and it now works fine.