One problem related to horn assembly has been reported for the 2004 Ford F-250. The most recently reported issues are listed below.
Experience stalling without warning while driving and may or may not restart. It will also stall after letting off the throttle when approaching a stop and occasionally while while stopped at a light. Rpm's will also drop to 500 and I have no throttle response, if it doesn't stall completely. This may occur 4 or more times a day, then may not occur again for a few days or weeks. There is absolutely no telling when it will occur, it is to random to identify the problem. Now my horn and cruise control have stopped working as well, when I replace the fuse it blows immediately. I have replaced the ficm, ebp sensor and wiring, fuel pump and still have not resolved the problem. My truck is not safe to drive. This has been happening since shortly after buying the truck in 2018, but seems to be getting worse as the temperature warms up. The following recall number 05v270000 sounds exactly like what I am experiencing, but does not show a recall for my truck.