[jsbihn]

dougie,
I think a few weeks back, if not a little more than a month back, there was a post on here by someone having the same issues.
I think I remember it was something more than just a switch or a fuse, but was still one of the Hummer Gremlins.
I dont remember what was said about the fix - so hopefully you find the thread and can post a link. (I would look myself but I am getting ready for work)
Good luck