Need new switches more than likely, had the problem where some would work some wouldn't, I replaced all 4 switches, everything worked fine, after 120$ in parts. what you will want to do is remove the switch on the problem window and see if you are getting voltage there, i still got voltage at all parts, but it was the switches, and its prolly the master switch only. do some electrical diagnosis like that and if it still does the same thing try a new switch, or one from a Junk yard if you can find one.