With your power window switches ... pull the door trims .. and pop the switches out ... the contacts discolour and ... well ... lose contact ... just clean them up a bit with some wet and dry and plug it back in ... and then try them. Common issue.
I had to so it with my driver's door switches and they worked perfectly after that.
Whilie you have your door trims off ... run some graphite powder along the window guides ... this helps the windows glides easier over them and puts less stress on the window motors as well ... just easier to do it while you have them off doing something else.
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