I don't think reprogramming the decoder is it because I can turn the loco's light off and on with the previously assigned address.

But I am also not sure how to reprogram the decoder.

Thanks for the reply.

It is a locomotive that came with the dcc ez command set.  The locomotive is the Santa Fe GP40.  The whole set is only 2 months old and was working fine until 3 days ago.  It is preprogrammed to button 2 and the light will still work on the engine when you hit function and button10 which tells me it is on the right address and getting power.  I took it all apart and do not see anything unhooked or out of place.  I am not sure about the loco's pick-up? 

Does Bachmann warranty their locomotives?

Thanks

Help

I have a dcc commander and all my trains run but one.  The only way I can get it to run is by holding a screwdriver to the track and the metal frame of the loco.  It will then run wide open and cannot control it.  Any suggestions as to why it will not run properly?

Thanks