How to Wire Your LED Light Bar Using a Relay
- Off-road LED lights
- Relay (with appropriate amperage rating)
- Wiring harness with a switch
- Inline fuse
- Ring terminals
- Wire strippers
- Crimping tool
- Heat shrink tubing
- Zip ties
Step 1: Gather your materials and disconnect the battery
Ensure you have all the materials listed above before starting the installation process. For safety reasons, disconnect the vehicle’s battery before beginning wiring work.
Step 2: Mount the LED lights and the relay
Install the off-road LED lights in the desired locations, following the manufacturer’s instructions. Find a suitable place to mount the relay, preferably near the battery, for easy access to power.
Step 3: Connect the wiring harness and the relay
Now it’s time to connect the wiring harness to the LED lights, ensuring a secure and weatherproof connection.
The relay needs to be connected to the vehicle’s battery using appropriate-sized ring terminals. Also, connect the ground wire to a suitable ground point on the vehicle.
Insert the inline fuse into the wiring harness and connect it to the battery-positive terminal.
When connecting the wires, make sure to attach the black wire and the red wire to the correct locations. The black wire represents the negative side and it should be connected to a ground point in the vehicle, while the red wires should be connected to your LED lights. Depending on the different kits, the colors might be slightly different, but black and red wires and the most common colors.
This step will ensure a seamless electrical flow, allowing your LED lights to operate efficiently. Remember, attention to these details provides a hassle-free setup and improves the overall reliability of your LED lighting system.
If you want to use the power from your vehicle’s existing features like brakes, reverse lights, or turn signals for your LED light bar, you’ll need to make some adjustments to get it working. For clarity, we’ll refer to each of these features as a “switch.” It highlights that the on/off functions already present in your vehicle can be utilized like a traditional switch.