Bob, you know if I told you I would have to ki.......oh never mind. I was able to teach in through the insulation from the fan hole and find, by feel, where the wires for the light switch went down through the wall. I then tied a nut to a string and dropped it down the hole. I took out the light switch and grabbed the string, and pulled a couple of wires up and then over to the fan. I got a two gang switch and replaced the one switch for the light with it. Easy as pie.
Peace
Dave