Does anyone know how to hook up a fan override switch on a 2001-2002 Grizzly? There is only one wire coming off the sensor? I was told it is a grounded circuit, and that all I have to do is run a ground to one side of a switch then on the other side of the switch tap into the sensor wire, is that all ther is to it? He wants it so he can control it but it will still come on if need be.