The first time this has ever happened to me. Purchased an old Texas Special Alco ABA. Sold to me as never run, so I opened her up to make sure there was no white battery. Found the battery had been replaced. put on the track, conventional controller ..ding ding she revved up, pulled her out of neutral, and after about two feet the horn sounded. Thought this might be a feature...but the horn won't stop.
Any suggestions?