Well, I put a new battery in and it still does not work. Since the unit was working just fine until I removed it from the mounting while I locked up the bike, I am assuming that the contacts are not working for some reason. They are clean as a whistle, but the one in the center looks as though it is further up inside the unit than the other ones. Oh well, I guess you may be right - time for a new one. A wireless would be nice.

Thanks for the help.