Thanks Rich.  Yes it is an actual short to the controller.  It will reset when I remove the engine and place it back on the track.  -cliff

I have a DCC 2-8-0 w/o sound, when I first purchased the unit it ran fine.  After sitting ideal on a deactivated track for about 6 months, when operated it will go a short distance, short out for a bit, then take off and run as normal, short out again and so on.  This is my only Steam unit in my fleet and I need some suggestions as where to start looking for what is causing the short.  Here is what I have done so far:
1.  turn the unit over and checked the connections, wheels and the rods, all appear to be in order.
2.  cleaned the wheels
3.  reprogrammed the unit
I have not attempted to take anything apart without some advice first.  Any Help or Suggestions?

-Clifford