Your question didn't mention if your carport was a cold (or perhaps even hot) place. My '93 Mazda experienced an episode of involuntary horn sounding in very cold weather. The research I've done suggests that the problem is a foam pad in the steering wheel which, when depressed (as in honking the horn) allows the electrical contacts to close the circuit and sound the horn. Age deteriorates the foam, cold weather further shrinks it, the contacts close, and the horn sounds. Solutions:
1) Replace the foam pad.
2) Reconnect the wires that you disconnected, forget about replacing the foam pad, but snip the horn wire (you won't have a horn anymore, but you probably don't need it anyway unless you think of it as an emotion-conveying device, in which case someone else should disable it for you anyway.) That's what I did, and it cost nothing.
Monday, January 25th, 2010 AT 4:29 PM