ford wiring diagrams/schematics
These are Ford's wiring diagrams, also known as schematics, for the 1980 - 86 light trucks. They are PDF's and you can zoom in on them to a great extent in order to actually use them. Or, better yet, click the pop-out icon, shown to the right, and available at the upper right corner of the page. It will open the file full-screen in another tab of your browser and the extra real estate and the ability to zoom will make the schematics more usable.