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This is a general installation guide on how to wire a relay harness and switch kit. These instructions apply to any car but for the sake of this guide, we will be using the Ford F-250 as a reference car to wire an LED light bar.
Before we get started, take note of this relay diagram on how to wire up the switch to your LED light. You will notice that the wire has 2 outputs, but for this LED light bar we will only need to use 1 output.
Here is a quick run through of which numbers correspond to which wiring location as well as a video tutorial on the wiring guide. We will be going over each of the numbers on the wiring guide and explain where each of the wires will be tapped to.
Step 1: Gather the shorter section of the output wires (white & black wires) and disable the terminals. You can do this by using some black tape to individually tape each terminal separately so they do not touch. Then cover both terminals together.
Test to make sure everything works and enjoy your new truck LED lamp.