All the kits I looked at had more circuits than I'd ever use. I have a bare bones truck with a generator and turn signals. I wired it myself and I am no expert. I used the schematic in the shop manual and replaced one wire at a time. Good wire, good connectors and a good crimping tool plus a pull test when done. The truck wiring is very simple. And yes I used all black under the hood because the longest wire is about 3 feet and anyone can trace that. My biggest problem was doing the gauges (still in progress) because of my size and the access.
