I am another that is severely electronically challenged and having problems with the sensor board.
I have not been able to get the one I have to work from the start. I do not have ready acess to a multimeter so no way to test the sensor other than covering and uncovering the sensor end.
Perhaps I am being presumptuous but the principle of the board seems simple enought to me. The sensor actuates a relay that makes or breaks the ground wire from the motor. I would think that un-plugging the sensor wires and then closing and opening the circuit between the sensor connector pins should activate the relay but even that does not work.
The wiring diagram seens logical and straighforward so the problem may be that my amateurish soldering job of connecting the motor ground to the connector pins may have damaged the board in some way.
Anyway, I ordered another board and, to eliminate my ham handed soldering ability, I also ordered a Female 18 AGW 2 pin connector to complete the ground circuit to the motor.
I am open to any suggestions as to whether I messed it up or the fact that it is just a bad board.