One problem related to horn assembly has been reported for the 2003 Ford F-250. The most recently reported issues are listed below.
My front end shakes it's not the high speed wobble my trailer brakes they do not work I'm blowing fuses in my fuse box via trailer my truck makes a moaning sound kind of sounds like a foghorn this is when I started or I come to a stop and when it's idling doesn't do it all the time my shifter on my column came loose and won't go into park.