I had to redo my headlight wiring last week. Seems using the original headlight harness was not a good idea with modern lamps. I had a wire get hot and break.
That gave me the opportunity to replace more of the original harness. I moved my relays that control the headlights from under the dash to the radiator support so my wires that handle the high amp load will be a short as possible. The switch wires for the relays are now the longest wires in that circuit.
I've learned a lot wiring this car, so maybe one day when I have time and impetus, I'll remove all of the wiring and start over WITH a plan and diagram instead of "adding as I go".