Ok. Thanks for all the suggestions.   I did in fact find that the crossing was bad by using a meter.   I returned that piece and exchanged it for a new one.    Now all is well.

Nope.  Just curves on both sides of crossover.  Could the crossover be the problem?

I just got a 44440. 30 degree crossing.  Brand new in package.   I hooked it up with just curves to make a figure eight.   When I turn on my DC powerpack,  it goes into overload.   If I remove the crossover the engine runs fine.   What am I missing?