Logic says that all door locks should not fail independently at the same
time, therefore if all have failed then there must be a commonality to the
problem. The common point would be a relay, OR the Control Box.

I haven't taken my Ford doors apart yet, but my Honda had the window master
controller inside the driver side door. It had an issue with cold soldier
joints, and an appointment with my soldering iron made it all better. I
don't know if cold solder joints is an issue with the Ford units, but once
you find the control box, looking for cold solder joints requires nothing
more than a careful inspection, and perhaps a magnifying glass.