Here's a '68 diagram showing the main circuits and headlights. @dukeboy_318 This is a good example of redrawing a factory diagram to focus on a specific circuit or two.
still looks like a maze haha. but hey, it has colors!
now, let me ask you this, this universal harness, I'm assuming its set up for a GM based system, so its probably designed for a voltmeter system, will that affect anything other than the ammeter gauge?