Where is the horn apparatus (under the hood) for my 2002 Ford Expedition? Horn has ceased to work, fuses are good, hearing contact of contacts in stearing wheel. Lots of snow and water lately, water in actual horn under hood???

There is the actual horn located in front of the radiator on the support.
I would also check the horn relay. You want to make sure that when depressing the horn button you are getting 12 volts to the horn, but it needs to go to the relay first.
I have a diagram for you :


2000 Ford Expedition Horn Relay Location
Please let me know how it goes.

Hi normally the horn is located just infront of the radiator to one side on the front panel, possibly if you look through the front grill to the right you might be able to see it, or if you look under the vehicle at the front, if you have a sump guard you may have to remove that first... hope that helps