I'll pull the front door panels when I get some time, have a look at the locks, and see what I can see.

As far as the rear windows are concerned, the switches in the front console seem to be getting power, but the power doesn't seem to be making it's way to the rear doors from what I can tell. Guess I'll have to try and trace the wires, but it'll be tough finding them unless I start disassembling everything.

Thanks for all of your advice. Hopefully I can get this stuff sorted out one issue at a time.