Hey John:
Dean from Lionel has posted the wiring diagram for this engine. I have double and triple checked all the wiring from the Radio board to the smoke control board, and on to the smoke unit itself.
The engine was working, all functions, drive motors, lights, smoke, sounds - talk and engine up and down.
Then the smoke fan quit responding to commands from the Cab-2.
Short of taking a working smoke control board out of my CP Vision ES44AC, I am waiting for direction from Lionel.
Enjoy Your Easter Eggs.