Can a car fix itself? TELL YOUR STORY!

Even the newer ones. My 94 Grand Cherokee had serious wiring gremlins. Dome light would randomly come on and the factory alarm would go nuts flash the lights randomly when the key went to acc and than wouldnt start. Lost it one day and tore apart the entire interior took my multimeter to every wire and went over everything with a fine tooth comb. Only thing I could find was that a sub fuse would keep blowing if i put it in while the main fuse was in. pull the main fuse, put sub fuse in than reinstal main fuse and voila it doesn't blow. After chasing that for a couple hours, i still have no clue why my electircal system is ghosting on me. Put it back together and never had any electrical issues ever again