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All of a sudden my radio, speedometer, odometer, side mirrors and dome lights/door lights stopped working. Plus my transmission is now shifting real hard. I suspect this is due to the fact my speedometer isn't working. Is there a single component that these are all tied to? I can't seem to find any blown fuses.
Check the fuses in the engine bay? I had something similar happen with speedo and trans shifting hard. Was a fuse in the engine bay. Had a short in a wire that was rubbing the frame. I somehow lucked out in finding that one.
Check your ground! Remove and clean all ground connections with 150 sandpaper. If all those items went at once some are not related nor connected to the computer. Check your ground.