Ford Bronco Auxiliary Backup Lights Relay Wiring Diagram with Manual Override

This document is a hand-drawn/CAD-style wiring diagram (credited to 'Adrianspeeder', hosted on SuperMotors.net) showing how to add auxiliary backup lights to a vehicle using a relay with a manual override switch. The stock backup light wiring (shown in green) feeds relay terminal 86 (green wire), while relay terminal 85 (blue wire) goes to chassis ground. A new circuit (shown in red) runs from the 12V battery positive to relay terminal 87 (yellow wire), and relay terminal 30 (red wire) feeds the new backup lights, which are each grounded on their own side. A manual override switch (brown wire) allows the new circuit's 12V feed to be connected directly to the stock backup light wiring/relay trigger, so the new backup lights can be turned on manually rather than only when reverse is selected. The stock backup lights remain on their original circuit (shown in blue) with grounds at each lamp. The diagram identifies standard Bosch-style relay pin numbers (30, 85, 86, 87) with suggested wire colors, making it a useful reference for anyone wiring additional reverse/backup lights with both automatic (reverse-triggered) and manual operation.