How to Properly Wire Additional Fog Lights on a Jeep Wrangler for Improved Visibility?

April 5, 2024

As part of your vehicle optimization project, you might be considering installing extra fog lights on your Jeep Wrangler. Well, you’re in the right place. Whether you’re an expert mechanic or a hands-on Jeep enthusiast, this guide will walk you through the entire process in a simple, comprehensible manner. From the required tools to the exact steps to follow, we have it all covered. Including tips on selecting the ideal LED lights, and how to handle the wiring and harness correctly.

Choosing the Right Fog Lights for Your Jeep

Before starting the wiring process, you must first select the ideal fog lights for your vehicle, and several factors will determine your choice. These include the size, type, and brightness of the lights.

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Fog lights come in various sizes, and you need to select one that fits your Jeep Wrangler without affecting its aesthetics or performance. It’s always recommended to check the dimensions before purchase.

The type of light also plays a significant role. LED lights are currently the most popular thanks to their energy efficiency and high brightness levels. They emit a white light that is perfect for cutting through fog, improving visibility during harsh weather conditions.

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When it comes to brightness, consider the lumen count of the potential light. A higher lumen count translates into brighter light. It’s recommended to opt for lights with a lumen count of at least 1500 for effective fog penetration.

Essential Tools and Components for Wiring Fog Lights

After selecting the correct fog lights, gather the necessary tools and components for the wiring process. The required items include the fog lights, a wiring harness, a relay, a switch, and a few basic tools like a screwdriver, wire stripper, and electrical tape.

The wiring harness connects the fog lights to the power source, while the relay is a protective measure that prevents high current from passing directly through the switch. The switch, on the other hand, controls the operation of the lights, enabling you to turn them on and off at will.

The Fog Light Wiring Process

Now that you’ve got your tools and components ready, let’s delve into the actual wiring process. Do bear in mind, though, that proper wiring is critical in ensuring the longevity and efficiency of the fog lights.

First, disconnect the battery to prevent any electrical mishaps. Then, position your fog lights in the desired location on your Jeep Wrangler and secure them with the appropriate screws.

Next, connect the wiring harness to the fog lights. Each light should have two wires – one for power (usually red) and the other for ground (usually black). Connect the power wire to the positive terminal and the ground wire to the negative terminal.

The other end of the harness needs to be connected to the relay, which should be mounted close to the battery or the vehicle’s fuse box. Once this is done, connect the switch to the relay using the remaining wires from the harness.

Remember to route the wires neatly along the body of the jeep, securing them with zip ties to prevent any loose wiring.

Testing the Fog Lights

Upon completing the wiring process, it’s imperative to test the lights to ensure everything is functioning correctly. Reconnect the battery and turn on the switch. If the fog lights illuminate, congratulations! You’ve successfully wired your fog lights.

However, if they don’t light up, don’t panic. Check the connections to ensure everything is properly connected, and the switch and relay are in good working condition. Sometimes, a loose wire or faulty switch might be the culprit.

Maintaining Fog Lights for Longevity

The final part of our guide focuses on maintaining your fog lights to ensure they serve you for a long time.

Regularly check the lights for any signs of damage or dimming. If you notice any of these signs, it could indicate a faulty bulb or wiring. Prompt action will prevent further damage and prolong the life of the lights.

Remember, proper wiring and regular maintenance of your fog lights will not only enhance your Jeep Wrangler’s appearance but also improve visibility on the road, especially during foggy conditions.

In a nutshell, wiring additional fog lights on your Jeep Wrangler can be a straightforward process, provided you follow the right steps and use the appropriate tools. With better visibility, your road trips will become safer and more enjoyable, regardless of the weather conditions.

Troubleshooting Common Problems

Even with the best care, fog lights can occasionally run into problems. If you find your Jeep Wrangler’s fog lights acting up, don’t fret. Here are a few common issues and solutions you might encounter.

Flickering or Dimming Lights: If you notice your fog lights flickering or dimming, this could be a sign of a loose or faulty wiring connection. Begin by checking the connection points on your wiring harness. If a wire is loose, secure it properly. If the connections look good, check the bulbs. If they are in good shape, consider the possibility that the fog light itself could be faulty.

Fog Lights Not Turning On: If your fog lights refuse to turn on, start by checking the switch. If it’s in good condition, move on to the relay. Should these two components check out, inspect your wiring harness next. A damaged or malfunctioning harness could be the cause. If all else fails, you might be dealing with a burned-out fog light bulb.

Fog Lights Staying On: Fog lights that stay on even after the Jeep is turned off can be a sign of a problem with the wiring diagram or a faulty switch. Check the switch first. If it is not the problem, inspect your wiring diagram.

One Light Not Working: If only one of your fog lights isn’t working, the issue is likely isolated to that specific light. Check the bulb, wiring, and connections related to that light.

By troubleshooting these common issues, you can ensure your fog lights remain in top condition, ready to tackle any weather conditions and provide wide beam visibility on your adventures with your Jeep Wrangler.


Wiring additional fog lights on your Jeep Wrangler doesn’t have to be a daunting task. From selecting the right lights compatible with your super duty Jeep, to installing and maintaining them, this guide provides comprehensive instructions designed to improve your road visibility. Proper installation involves carefully connecting the wiring harness, positioning the lights on the front bumper, and ensuring that the lights will work via a well-placed turn signal or switch.

Remember that while LED bulbs provide excellent visibility, their performance is heavily reliant on correct installation and regular maintenance. Ensure that all connections are secure, and regularly check your bulbs and wiring for any signs of wear and tear.

With the right tools, a detailed wiring diagram and a bit of patience, wiring LED fog lights on your Jeep Wrangler is a task you can accomplish. By investing your time in this project, you will enhance your Jeep’s aesthetics and, more importantly, boost your visibility in adverse weather conditions, making your driving experience in your Jeep Gladiator not only safer but also more enjoyable. Happy driving!