hey man, I have a 98 4door and I had the same problem with the backseat driver side door lock. The door lock just stopped working and I was like :wtf:

I opened up the door panel and investigated and realized that the door lock actuator stopped working. I opened up the thin white piece of plastic and realized that the motor in the actuator responsible for moving the door lock had just died (it has a Mabuchi motor, same electric motor that they put in toy cars.) I went to the dealership, bought a new actuator ($30.00) and that fixed the problem. (i work at the dealership so it cost me around $22.00, not too expensive.

About your power windows though....you got me there. I have no idea? maybe is a motor problem too?