Thank you very much for your time, and information. It seems to be a little more complicated than I was hoping for. I do not want to damage the electronics. I thought that maybe I could just cut one wire on the smoke unit motor itself. Run one side down to the cherry switch. Then from the other side of the cherry switch back to the other side of the cut fan motor wire. And just use the existing cherry switch to intermittently turn the power to the Fan driven smoke unit on and off, with the revolution of the cam. Providing it was a grounded circuit and not positive. It was just a thought. Tearing down and servicing all these newer TMCC locomotives is new to me.
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