1998 Other Plymouth Models Horn

Last night I was awakened by the sound of a car horn blowing non-stop. It took a while, but I finally realized it was my 1998 Plymouth Neon Expresso. I disconnected the battery so my neighbors wouldn't kill me, and the next morning took a look. I reconnected the battery and the horn started blowing again. I removed the relay (I think it was a relay) from under the hood, and of course this stopped the horn. I took the relay apart and it seemed to look alright (not burnt or anything like that). Earlier that night we had a horrendous thunderstorm with many nearby lightning strikes. I was wondering if lighting striking so close could have ruined the relay. Sounds like a stretch to me, but it is the only cause I could think of. Do you think the relay is shot, and a new one would solve the problem, or is it likely something else electrical, and removing the relay was only a "quick fix?" I suppose I could just buy a new relay and find out, but I don't know how much they cost (if they are like most parts, not as cheap as they look) and would hate to invest in a part I don't need. Have you ever heard of such an occurrence, because I never have? Thanks.