bigchingan

I'm a student about 300 miles from home, and have a 126 300SD that keeps blowing the number 10 fuse when i accelerate hard enough to downshift. I troubleshooted all of the other possible causes (ac compressor short, short in the reverse lights) The items I know that run off this fuse are the reverse lights, blower fan for the HVAC, AC compressor, and LCD temp gauge. When it blows, it leaves the heating vents open, so as the engine heats up, so does my car. Mainly I want to find an easy way to rig it so I can have the front winshield defrosting portion of the HVAC for my drive home at thanksgiving . I have a feeling me using "D" and third gear as if they are manual has something to do with the underlying cause of this (a Car like this in the extremely mountainess area I live in is almost as slow as walking without some added encouragement). Any suggestions?