I'm repairing an M10000 UP train for a client, and have run into an odd problem.
I have the cab and rear diner/lounge here (he kept the center car at his place) and, after replacing the rechargeable battery, changing the gear grease and lubing and cleaning the wheels, the cab car runs fine with working horn and F-N-R.
The odd part comes from the powered diner/lounge. By itself, the diner lights up when track power. But as soon as I plug the cab car into the diner, a dead short occurs.
I've checked the black and red (power) wires on both connectors, and checked continuity; the only time a short occurs is when the two units are plugged together.
Any suggestion as to what, specifically, to look for when I dive into the wiring?
Thanks!
Mitch