Keep in mind that these motors work by reversing polarity and that's done in the switch. The power and ground flow through the master switch and passenger switch. Everyone suspects poor power when something doesn't work right, but most often it's a bad ground. The ground for the driver's switch is located on the left pillar and passenger switch on the right pillar. Clean those before you replace any other parts.

You could also do a voltage drop test between the driver's switch ground wire and the ground at the pillar. Same on passenger side.

If all that checks out and you've lubed the channels, I'd suspect a bad regulator. I've had a few of those.

 

My 2002 driver side window dropped down into the panel. The motor is working as I can hear it when I move the switch up or down. Once I get the door panel off, is there anything specifically I should be doing to get the window back on its track?