Blower fan wiring

[okiejim]

Does anyone know how the basement blower fan is wired to the furnace. I put in the Cheap Heat and everything is working just fine. I would like to know how the blower fan is being signaled by the furnace. Is it tapped into the sail switch?

["007"]

I would say its off a pin on the furnace control board, just battery feed, ground could be picked up anywhere.
Will look for a diagram for furnace control board.
Just thinking out loud the fan in the tin foil tube in your bay area maybe just wired off the hot side of the fan in the furnace no need for special pin off board could be just a multiple connection on the board pin.