I've replaced the window motor. The window rolls down ONLY if the button is pressed exactly right. It always rolls up. I cannot be for sure if the driver's side window switch doesn't work for the passenger side. Do you know the answer to this riddle?

 

Are you indicating there are two problems: 1) passenger side button works intermittently on the down position; 2) driver side button for the passenger side window doesn't wor at all?

 

That is correct