@gunrunnerjohn posted:Switch the 3-rail/2-rail switch back and forth a couple times and then leave it in 3-Rail. Measure continuity between the left and right wheels and make sure it's connected them properly. This switch is a common trouble spot.
You know John I have one such 2 rail/ 3 rail loco and have not had any troubles but it occurs to me now that you mention it that in a derailment on a turnout a dead short through that switch might be possible. Next time I have to service it I may trace some wiring. PTC fuse ? j