Mark,
I do not have the answer to your situation but I want to thank you for giving me the answer to mine.
I did not know the defroster would not work if the window was not all the way up. I guess mine was not quite all the way up today and it stopped the defroster from turning on. I checked all the fuses and was getting frustrated. I did a search on the forum and there is your post.
Thanks again
This Coors (no bud in Colorado) is for you