PRR T-1 4-4-4-4 and ACL passenger cars.
This is by Alco models with lights and TCS 1517 decoder installed.
Running the train and it started to short. After checking that it wasn't the cars, check engine and tender and found one wheel came loose from its insulation on the tender truck. Some CA fixed it.
This engine has about the same tender as the PRR S-1: long, skirted and 8 wheel trucks. The front truck would, occasionally, derail. Added a metal washer to raise the tender over the truck and removed the bolster spring for more vertical and horizontal movement (seems to have fixed it).
