Hi all,
As I promised, I returned with news.
After disassembling said light switch, there are two green LEDs soldered on the switch body, under the rocker (top) part.
Checking the LED with the diode setting on my Fluke meter, DAMN, they showed good.
So I reassembled the switch, reinstalled it and the damn thing works.
I guess I had a loose connection at the plug-in (or in my head).
Anyway, all is now right with the world (my world).
Thanks to all for the help and input.
Bill.