School me on wiring

I'll add that the old 1960-70's schematics are quite easy to read. Not only was the wiring simpler then, but the diagrams were drawn by humans and the components are drawn as they look in real life. You can even find after-market drawings of specific circuits like the charging or ignition which focus only on those wires, in vivid colors. In newer cars (say 1995+), the schematics are computer-generated and it takes time to figure out how to interpret them. For all, you learn by jumping in.