Had a perfectly running 2-4-4-2 on a simple figure 8 layout. Would occasionally switch-out loco & rolling stock. Mysteriously, the loco stopped moving though the lights & sound would work perfectly. Indication of short on controller. Did my best to clean base of loco & trucks with gentle brushing and blowing but no help. Other locos work fine on track. Not getting indication of short anymore but still having problem.
Any ideas? I don't really know what I'm doing, just doing my best.
Thanks,
Art
A possibility is one of the wires in one of the plugs between tender and loco is loose. The 2 pin is track power, four pin is motor and front headlight. All sound is in the tender, so that would continue...