I have a '08 Dodge Ram 1500 BigHorn Edition that has developed some issues with the power door locks and I've looked thru the threads here looking for a answer, but really didn't see much other than broken wires.

It started with the drivers side front door as it quit working, this was soon followed by the rear drivers side door. The thing that kind of baffles me is sometimes the 2 on the passenger side do not work, other times they do.

What could be causing this before myself and a friend start tearing into it?