Been working on this for a week or so and can't figure out what the freaking problem is with my windows!

Fuses are all ok. Relay appears to work because the left rear window rolls up and down just fine. As far as I know, there is only one relay. The right front window will roll up, but not down.

I tested right front window switch and right rear window switch on the functional left rear window, both the other switches work fine. That eliminates the 3 switches besides the master.

Now, the master will work the left rear up and down just fine. It will not roll the others up or down. I tried two other master switches and they all do the same thing. Left rear works, others don't.

I tested the window motors with a fused 12v battery. By plugging a connector with leads into the window motor plugs and reversing the polarity of my battery, all the window motors will roll up and down just fine. That eliminates the motors themselves, right?

Any ideas? I'm at my wits end with this window thing!!