Thank you Scott, I’ll take a look at that and see what I might have going on.
I understand that the 2 rail system has to have an isolation feature (I’m also converting a bunch of 3 rail freight to 2 rail trucks and Kadee couplers) and that’s what has me stumped......if there were hi-rail wheels on it, I would have immediately thought of short through the axles.
I‘ll post my findings after investigating.