Hey, I have a 2003 f250 diesel. My brake lights stopped working. the one on top of the cab works,but not the two down at the tailgate. All other lights work fine. Checked fuses and they seem to be good. i did trailor by boat this weekend (gotta love that diesel power) not sure if that shorted out lights? Any ideas?
Thanks

 

check your turn signal switch .... some of the wires may have come disconnected or the switch may have gone bad ... i had the same problem in my 97 250 Light Duty ...

 

As a last resort I replaced the two bulbs. For some reason both old bulbs had blown at the same time, must have somthing to do with boat trailer. All works great now.
Thanks