frenchie... that's the best picture yet.... and great explanation, too..
I does seem like the single wire has to go back to the fan, since it has the power source.
fishing a single wire shouldn't be too difficult.. the bathroom is only 6 feet wide and the fan is centered in the ceiling... the wall for the most part is opened up.
Monday, Tuesday, and Friday are my busy days at the day job..
also, my son's car was running hot... and he needs a new fan clutch... now basic mechanics i understand.
i am monitoring the boards and really appreciate you guys.
i promise i'll keep you posted of my progress