How to Wire a Relay for Off-Road LED Lights – Extreme Lights What Is A Relay?Do I Need A Relay?How to Wire Your Light Using A RelayA relay is an electrical switch. It allows a low current “switch” circuit to control the electricity flow of a high-current circuit.See more on extremelights How to Wire a Relay for Off-Road LED Lights Learn how to wire a relay for off road LED light bars and work lights. Learn what a relay is, how it works, and why you should use one. How to WIRE A RELAY to a switched circuit for auxiliary Click to view on Bing11:42How to wire aux lights, fog lights, LED lights, light bar or anything else to a switched circuit in your vehicle the RIGHT way. with a relay. Want to suppor..Author: D&E In The GarageViews: 87K Wiring an LED Light Bar - Supercheap Auto Wiring an LED Light Bar Aftermarket driving lights like spot lights and LED light bars offer the ultimate driving light solution for every vehicle. The single plug must be connected to the relay, and the ring terminal on this end needs to be connected to an earth.