@Stan Galat you have my admiration for taking on this project, and I’ll be the first to say that when I originally wired up my car (I built my own wiring harnesses) I did it while planning with neatness, reliability and serviceability in mind, so the basic stuff was done pretty well. I had visions of it emulating a well cabled data center, like this:
Then I added things like a radio, courtesy lights, a different stop light switch in a different place, an air/fuel ratio meter, a heater for my O2 sensor on the A/F meter, a cell phone charger, gas heater control and probably other stuff I have forgotten. You do your best to blend that all in, but it often ends up looking like this:
At least these guys used different colors - I have been in Data Centers where ALL cables are blue and not labeled as to source and destination. 🤬
Don’t be like the impatient Speedstahguy. Take your time and make it neat (Honestly, I’m sure you will). Your OCD side will thank you.
Just keep asking as you are going along;
“OK…. How would I service this if it needs it?”