Reply to "Horn blows withhout pushing the horn button"

I have an old Williams EP5 that if the track is not clean will blow the horn as it runs. Clean the track and it stops. My test track a  circle of O-72  had arc pits in the center rail of three or four sections of track and when it ran over that track the horn blew.   I made a sort of track cleaning car that slides a copper plate on the center rail and burnishes it. If I run that car a while the EP5's horn does not blow when it crosses those bad sections of track.  Nothing like clean track and sound wiring connections to keep trains with complicated electronics from going crazy, or worse.  Your track and wheels cannot be too clean                           j