Ok, I searched the Forum and found one old thread that sounded just like my problem, but it was unresolved and closed due to age. So I will open it again.
I have a `94 s-10 Blazer 4-door LT. It`s all factory original including the radio and speakers and the wiring harness has never been cut or spliced. One day last week the radio quit working, no display at all. When I pressed the time display I noticed the clock worked. Then I noticed that the rear wiper was parked straight down. I tried it and it did not work either. I didn`t think that the two problems could be related until I broke out the factory manual and found out that the rear wiper gets its power from the same 15A fuse, which I found was blown, but as soon as I put a new fuse in it blows. I guess I will start at the rear wiper and unplug it and its switch and try a new fuse. If that fuse blows then I will pull/unplug the raido and try again. If anyone else had this same problem, let me know where you found it. It will save me some hassels. If not, I promise to post what I find out next week. Thanks, Jeff.