First guess would be a wiring issue. Have you done anything to the car recently, or any other systems acting up you're aware of?
I'd have to say the easiest way would be to pick up a OBDLink and Forscan. The knockoff "forscan cables" on Amazon should also work for your needs, as long as it has a HS/MS switch. It'll bring up Ford-specific body codes that you won't normally see using an Autozone reader.
I pinched a wire once reinstalling my radio and it was able to bring up the trouble code for 'short to ground'
I'd have to say the easiest way would be to pick up a OBDLink and Forscan. The knockoff "forscan cables" on Amazon should also work for your needs, as long as it has a HS/MS switch. It'll bring up Ford-specific body codes that you won't normally see using an Autozone reader.
I pinched a wire once reinstalling my radio and it was able to bring up the trouble code for 'short to ground'