I would still try to replace one of the switches. I know when I was trying to solve my driver's door window issue, they let me take the switch panel out and test it to see if that was the problem before purchasing it. It turned out not to be the problem (my one-touch down feature was causing a problem in the GEM module), but there isn't as much to the windows in back. I would think its either the switch or the motor, but the fact that the windows will move tells me it should be the switch. Only way to tell is to try and replace one of them and see if it helps. Good luck, and post back if that does not help.