How to Wire Auxiliary Lights

Are you wondering how to wire auxiliary lights? Wiring auxiliary lights is a relatively simple task but it can be intimidating if you haven’t done this type of project before. This guide will provide you with step-by-step instructions to help make the installation process easier. 

How to Wire Auxiliary Lights

We’ll provide tips to help ensure that you wire the auxiliary lights properly, so that they will operate as expected and last through elements such as rain, snow, and extreme temperatures. Read further for helpful information about what materials you need for the job and key safety guidelines related to working with electricity!

Installing them can be a daunting task, but with the right knowledge and tools, it doesn’t have to be! In this blog post, we’ll dive into all the steps necessary for wiring auxiliary lights correctly so that you can get back on the road quickly and safely. 

We’ll also discuss some tips for troubleshooting if something goes wrong along the way. So strap in as we take an informative deep-dive into how to wire auxiliary lights!

Why May You Want to Wire Auxiliary Lights?

1. To Increase Visibility

One of the main reasons to wire auxiliary lights is to increase visibility in low-light conditions, such as driving at night or in foggy weather. By adding these extra lights, you can greatly improve the amount of illumination your vehicle has, helping you see better and stay safe on the road.

2. To Make You More Noticeable

Adding auxiliary lights can also help make you more noticeable to other drivers, especially if you install lights that are a different color than your vehicle’s stock headlights. This can be helpful if you’re driving in an area with a lot of traffic so that other drivers will see you better and give you plenty of space.

3. To Give Your Vehicle More Style

Finally, wiring auxiliary lights is a great way to give your vehicle some extra style, especially if you go with a unique lighting setup. This can be fun and help make your car or truck stand out from the crowd.

How to Wire Auxiliary Lights in 6 Easy Steps

Step 1: Gather All The Tools You Will Need

The very first step is to gather the tools and parts you will need. These include the auxiliary lights, toggle switch, wire strippers, heat shrink tubing, electrical tape, soldering iron, solder and a drill.

Need Auxiliary Lights Toggle Switch Wire Strippers

Step 2: Prepare The Lights

The next step is to prepare the auxiliary lights for installation. First, attach any mounting hardware that came with the light if necessary. If not, make sure the lights are securely fastened to your vehicle.

Step 3: Connect The Lights

Next, you will need to connect the auxiliary lights to a power source. To do this, use wire strippers to strip off about ½” of insulation from both ends of the wires coming from the light and attach them to the battery with terminal connectors or a crimp connector.

Step 4: Create The Ground Wire

Before you can connect the lights to the switch, you must create a ground wire. To do this, take a length of 16-gauge copper wire and attach one end to the negative terminal on the battery. The other end should then be connected to the frame or body of your vehicle.

Step 5: Connect The Switch

The next step is to connect the switch to the lights and power source. First, strip off about ½” of insulation from both ends of the wires coming from the switch and attach them to a 12-gauge wire running between the lights and battery. Then, use heat shrink tubing or electrical tape to insulate the wires.

Step 6: Solder The Connections

Finally, solder the connections between the switch and wire to ensure a secure connection. Once you have done this, attach the switch to your vehicle with screws or by drilling holes in the dashboard panel.

Drilling Holes in the Dashboard Panel

Once all these steps are completed, you can now enjoy having reverse lights that are connected to a toggle switch. With this, you can easily control the lights and turn them on and off with just one switch.

Some Extra Tips to Wire Auxiliary Lights

1. Do Not Use Too Thin Wires

When wiring auxiliary lights, make sure you do not use wires that are too thin. Using thinner wires can cause them to overheat, resulting in a potential fire hazard. Also, if the wires are too thin, they may not be able to provide enough current for the lights.

2. Use Relays

When wiring auxiliary lights, it is important to use relays in order to prevent damage or short circuits. A relay acts as a switch that can control high-power devices like light bulbs and motors without causing an overload on the circuit.

3. Place a Fuse in the Circuit

When wiring auxiliary lights, it is important to place a fuse in the circuit. This will ensure that if there is an unexpected surge of electricity, the fuse will blow and prevent damage to your lights or other components. It is also important to use a fuse with an appropriate rating for your application.

4. Double-Check Connections

When wiring auxiliary lights, it is important to double-check all connections before powering on the lights. This will ensure that everything is connected correctly and safely. Make sure to inspect all wire connections for exposed conductors or loose connections.

5. Label All Cables

When wiring auxiliary lights, it can be helpful to label each cable so that you can easily identify which cable goes to which light. This will help save time and effort when troubleshooting any potential problems with the lights.

Following these tips will ensure that your auxiliary lights are wired properly and safely. Make sure to always use caution when wiring anything in order to avoid injury or damage. Good luck!

Frequently Asked Question

What Precautions Should Be Taken Before Wiring Auxiliary Lights?

Use Relays in Order to Prevent Damage

Before wiring any auxiliary lights, you should take a few safety precautions. First, make sure that the power source you’re tapping into is capable of providing enough voltage and amperage for your intended purpose. 

You will also want to turn off the power supply before beginning work. Additionally, use caution when handling exposed electrical wiring and be sure to wear protective gear such as gloves and safety glasses.

Can I Wire Auxiliary Lights Myself?

Yes, you can wire auxiliary lights yourself, however, if you are unfamiliar with electrical work it is best to consult a professional. Wiring electrical components incorrectly can cause serious safety hazards and may damage the components themselves. Additionally, some municipalities have laws that require all wiring to be performed by licensed electricians.

Are There Different Types Of Wiring Connectors For Auxiliary Lights?

Yes, there are different types of wiring connectors for auxiliary lights. The most common type is insulated butt splices, which come in various sizes and colors to suit your specific needs. 

Heat shrink tubing can also be used to cover exposed wire connections, providing extra protection from short circuits or other electrical issues. Additionally, twist-on connectors are another popular option for connecting auxiliary lights. These connectors are easy to use and provide a secure connection between two wires.

Can I Connect Auxiliary Lights To My Vehicle’s Existing Wiring System?

Yes, you can connect auxiliary lights to your vehicle’s existing wiring system, however, this should only be done with caution as it may cause damage to the vehicle’s electrical system. If you are unsure of what steps to take, it is best to consult a professional who can safely and accurately complete the wiring task for you.

What Other Safety Measures Should I Take When Wiring Auxiliary Lights?

When wiring auxiliary lights, be sure to double-check all connections before applying power. Additionally, never attempt to splice or cross-connect any wires that are not the same type. Finally, be sure to use electrical tape or heat shrink tubing when connecting multiple wires. This will help ensure a secure connection and prevent dangerous short circuits from occurring.

Never Attempt to Splice or Cross Connect Any Wires


Working with auxiliary lights can seem like a daunting task at times. However, we can easily tell by now that it doesn’t have to be difficult if you have the right instructions and knowledge. Once you’ve done it successfully at least once, you might find it’s an easier job each time you go back and add more features to enhance your vehicle’s lighting output. 

Wiring up auxiliary lights is a great way to make your car look better and stand out from other cars on the road as long as you take the time and effort to ensure they are done properly. With a little practice, anybody can learn how to wire these accessories in no time – just follow the steps on how to wire auxiliary lights outlined in this blog post, use the recommended tools, and avoid cutting any corners in order for everything to work smoothly.

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