Thanks for the info. I've contacted Bachmann, since it's still under warranty, and they've asked me to send it to them for service. I think it may, in fact, be the plugs; they are VERY loose, and the main plug keeps popping loose each time I handle the loco. Even when I make sure the plug is what I think is tight, the problem still occurs, however. I'm thinking it may just be a faulty set of connectors. In any event, thanks again. I'll let you all know what Bachmann finds out.
Ken
Ken