Started at the wrong end!
At the ops, last night, one train with the Erie triplex was shorting. It had about 25 cars and I started at the caboose end, removing 2 cars at a time until the problem went away. Had two cars left and moved them a few feet and no short. Then ran the engine with the two cars and the train shorted so figured it was the engine. We replaced the engine and left off those two cars and I'd check the engine, later. Next morning, I tested the engine and it ran fine the entire mainline. I kept all the possible bad cars, fortunately, on my work bench and it turns out one of the cars with the old sprung metal trucks was allowing the new intermountain all metal wheel sets to contact each other. That car was the last two cars tested next to the engine!
Shorting trucks.
Put a white plus sign in the Digitrax throttles so engineers know how to insert the 9 volt battery.
