Ford Bronco Auxiliary Backup Lights Relay Wiring Diagram with Override Switch

This document is a hand-drawn (CAD-style) wiring diagram showing how to add auxiliary (new) backup lights to a vehicle using a standard 4-pin automotive relay, uploaded to the gallery of a 1988 Ford Bronco. The diagram shows the stock backup light wiring (blue line) feeding the factory backup lights at the bottom. A tap from the stock backup light circuit (green line) feeds relay terminal 86, with terminal 85 (blue) going to ground. A manual override switch is shown in-line on the green trigger circuit so the new lights can be switched on manually, fed from a new 12V circuit (red line). Relay terminal 30 (red) receives power, and terminal 87 (yellow) — the diagram labels 30 as the output to the new lights and 87 as connected to the new 12V circuit — powers the pair of new backup lights, each grounded on its own side. Wire colors for the relay terminals are labeled: 85 blue, 86 green, 30 red, 87 yellow. A reader can learn the basic relay hookup for adding high-power auxiliary reverse lights triggered by the factory backup light circuit, with a manual override switch option. The image bears the watermark "Adrianspeeder" and contains no year, model, part numbers, or fuse ratings.