I've had a similar problem today as well with my 81 300D. My driver's side rear window will not go down and, when I try it, it blows the fuse. The passenger side front window works fine, though (until I blow the fuse with the attempt to use the driver's side rear window - they are on the same fuse). I suspect I either have a bad motor or bad wiring on that driver side rear window. I'll try and figure out how to check that out tomorrow.

On the plus side, I took a 240 mile road trip with her today and she ran like a top!

Jim

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1981 300D - 192,400 miles
2003 Toyota Corolla