Power Windows and Mirrors Quit Working on 1998 Volkswagen Cabrio

The motor on the windows was replaced in the spring. We had many wet and humid days.
The windows and the power mirrors were working one evening and quit the next day. I have checked the fuses and they appear to be good. Could there be a problem with a relay? How can you tell if a relay has gone bad?

Asked by for the 1998 Volkswagen Cabrio
I would check the switch in the drivers door. here is a place to get thewiring info and the check out sheet for the switch