2004 Explorer horn goes off when key removed

I have a 2004 Explorer, when I stop the truck and remove the keys the horn goes off. When I put the key back in the horn stops.

Any help would be great

Thanks

Does the horn stop as soon as you insert the key in to the ignition key cylinder switch, or do you have to turn it to ACC or Run to make the horn stop?

-Rod

As soon as you put the key in. I tried another key still happens, I also tried to disconnect the batttery for awhile still going off.

Brian

And it's a constant honk, not like what would happen if the security system were going off?

I don't know what about putting the key in the key cylinder and not turning it would cause the horn to stop....

-Rod