"How To....."
Complete list of Wiring Diagrams
(February 25, 2018)VintageBus.com used to host the best listings of all the various wiring looms. As VintageBus website no longer seems to be working, and instead links direct into theSamba.com, but their list of wiring diagrams is incomplete.
This direct link used to work, and may come back - Wiring diagrams
theSamba.com list are here - https://www.thesamba.com/vw/archives/info/wiringt2.php