I have an O-gauge Williams Erie Lackawanna PA-1 A-B diesel set from 1993 (AC-13 and AC-15).
I think the reversing board / control board just died.
The board does not use harnesses; it just has 3 wires each going to each of the 2 can motors.
I can send you a picture if necessary.
Does anyone know where I can buy another board?

Sincerely,
George Lurie