I have a 2008 Ford F-150. All my key fobs suddenly stopped working. I went ahead and changed the batteries and tried to program them again but they still wont work. I didn't know what fuse, if any, would be out that might be causing and issue. I found no bad fuses. Any help would be appreciated. Also, I took my truck in to the dealership 2 weeks later to get the door combo code and see if they could help with the fobs but they said they were not able to connect the computer because it wasn't showing a signal. Don't know if this is related.