Stuart,

I can't tie it to any particular change. I thought it was a bad connection in the ignition switch to start with, so I changed the switch. I noticed that sometimes it would shut off instantly, like normal and sometimes not, and it was by accident that I noticed that the fan switch would kill it. If I shut off the key, it would run for a few seconds, but if I shut off the key and then turn off the fan switch it dies instantly. At first I didn't believe it, but you can easily tell the difference.

Joe