2004 Ford Expedition electrical problem, any advice?

While driving yesterday, the AC shut off and the service engine soon light came on.

The car drives good but now all sorts of weird electrical things like power locks won't work the key fob won't work.

It's a drag, good car, but I need the AC back!

Ford puts one 'big' fuse in line with all the dashboard circuits, like the A/C, power windows and door locks. It's in the 'power distribution' box under the hood.

The A/C and alternator belt came off, have it replaced as soon as possible.

All those things will happen when you have a bad engine to chassis ground.