Mine is doing the same thing.  I sent back the trolley thinking it was that.  But the trolley returned to me does the same thing.  If I put the trolley on a track controlled by a higher tranformer the trolley works fine.  I haver cleaned the track and at all connections it just doesn't seem to be getting any power??

I think the trolley itself has gone bad.  I get about 7.2 volts with the meter on the track.  I out another engine on the track and it works just fine going back and forth.  I'm sending in a repir request as we speak

The end track is in the right place.   What type of voltage should I see across the track?

I have the christmas village trolley set.  This is the one with the trolley that will auto reverse.  Out of the box it ran great.  Then the second Christmas it was up it seemed to run very slowly.  Now it won't run at all.  I've cleaned the track and tested the trolley on a standard track that is powered by a tranformer and the trolley runs great.  It's only on the special reversing track that it won't run.  Any sugestions?