Wiring and electrical issues and modifications are what I despise most about tuning. I’m not sure I’ve ever seen it done in a manner that revivals what the OEM’s manage… that includes all of my own efforts too.
This is a document sticky, that I’m really excited about: a Toyota Wiring Repair Manual. Dated from 2007, it’s perfectly relevant to a project I’ve been sitting on for some time, and with 451 pages, it not only has some wonderful, official “how-to” information, but also has a great big list of part numbers for connectors and terminals.
Although I immediately notice that two critical ones are missing.