Introduction: This just grew. Writing this, I got to yack (in text) about a lot of tangentially connected topics. In my research role, I code every day, and type faster than most. And have been accused of being chatty in real life ... not sure about that! This project seems really simple to me (probably because of my history), but it often comes up as a question or topic. A very nice man (now deceased) on one of the Wagoneer forums made and sold quite a few specialty harnesses to complete this same project. Apparently other companies sell specialty harnesses to do this for Chevy trucks or whatever. This is not difficult or complicated - once you get the idea, you can do it without any custom circuit boards or harnesses. I will divide this into separate mini-articles. Executive Summary Some Basic Electricity Electrical Components Parts List Wiring and Diagram Assembly Including Splices Tools Fusible Link Instead? Further Improvements? I have written this out complete in OneNote, but it will require a bit of formatting as I go. If you are interested, stay tuned.