Quick and easy way to wire a relay to safely power added lights. Why you need a relay is also covered. This video will explain details of how to wire a relay switch for off road lights, compressors, or any other added accessory. We're using a four pin relay, couldn't be any simpler. A diagram showing a 4 pin relay makes it easy to understand.
How To Wire An Automotive Relay Switch, With Diagram, 4 Pin