For the record, my car is wired properly with the proper GM color coding and a new aftermarket fuse box. I had to do a few mods to counteract some of the mods the PO did, like shaving the door handles off the car(Fluckin' stupid idea) and he installed headlight "tunnels" that you couldn't fit ANY type of headlight into until someone in China started making 2.5" diameter mini motorcycle headlights about 5 years ago. Yeah, there's lots of wacky, yet functional, LED interior lighting, but they use almost no power and virtually all of it is attached to one terminal strip tapped into the accessory lighting circuit. I was quite pleased to learn, during this past year in Hell, that all the electrical/mechanical work I did was rock solid. It was the darn engine innards that I farmed out to someone else that bit me in the arse.
Keep in mind that I work on machines all day that make my car's electrical system look about as complicated as a can opener, so doing all that electrical stuff was nothing for me.