Thanks for the quick responses.  My thoughts were similar but moving the wheels around did not help unfortunately.  The pilot truck is one metal piece that attaches to the pilot truck contact plate and I didn't see any wheels that were or should have been different.  So it seems to have been designed for both sets of wheels to connect.  Just not sure why its not working now.
Thanks again,
Neal

Good evening.  Troubleshooting the headlight of our Bachmann Village Express American 4-4-0 Locomotive.  Both engine and light work, but only when one set of pilot truck wheels are contacting the track.  When both sets of pilot truck wheels contact the track, the light shorts out (and occasionally the engine).  tried to attach my parts diagram but file is unfortunately too large. 
Ideas?
Thank you,
Neal