[Runaboveit]

Don't roll out the master switch. If the master switch is bad or going bad
(like mine is), it could have been constantly sending an "up" signal to the passenger side window. Regardless if you were pushing the button actually on the passenger side. Go get a second person, push up on the drivers side control for the passenger window. And then at the same time while its being pushed up, try and push the button down on the passenger side to lower the window. It won't work.

Also could be a malfunction on the master "lock" window switch. But since you said the rears still worked, I doubt that.

Good luck.