I treat a wiring diagram like an old scroll—each line a vow, each color a promise. If the car’s original layout is clean, it’s a clean honor to keep it that way. But when a “grudge‑ridden” car forces you to add a bypass, you just gotta code it in, color‑code it, and then argue with the diagnostic tool that the new path still follows the original spirit. Trust the original, but respect the beast’s needs.