I was making sloppy electrical mistakes all day Sunday rewiring around bad sensors on the BMW top. I was equally embarrassed, shit I should have had right took me four tries. (just needed to make a basic DC motor reversing relay pack, driven directly from existing buttons. I wired it wrong three different ways, and then shorted my feed wires and had to change the fuse before connecting THOSE backwards too and having nothing work. I do not have an excuse of dealing with CAN bus BS since I was explicitly bypassing safety and limit things that have gone bad over the past 20 years)