Jeep Wrangler owners love to customize their vehicles, and for good reason. The Wrangler is built for adventure, and upgrades make every trip safer and more enjoyable. One popular modification is adding a spare tire light. This small change increases your visibility, especially at night or in bad weather. If you’ve ever wondered how to install a spare tire light on your Jeep Wrangler, this guide will walk you through the process in a clear, step-by-step way. Whether you’re new to DIY or have some experience, you’ll find tips, warnings, and advice that make this project smooth and trouble-free.
Why Install A Spare Tire Light On Your Jeep Wrangler?
Most Jeep Wranglers come with a spare tire mounted on the back. This placement is useful, but it can block your stock third brake light, especially if you upgrade to larger tires. Spare tire lights solve this problem by giving you a new, highly visible brake light. Here’s why it matters:
- Safety: Increased visibility means other drivers see you sooner, reducing the chance of rear-end accidents.
- Legal Compliance: Many states require a visible third brake light. If yours is blocked, you could get a ticket.
- Style: Many spare tire lights have bright LEDs and creative designs, adding a custom look to your Wrangler.
A spare tire light is a simple, affordable upgrade with real benefits.
Choosing The Right Spare Tire Light
There are many spare tire light kits for Jeep Wranglers, but not all are equal. Here’s what to consider before buying:
Fitment
Check that the light fits your Jeep’s model year and your tire size. Most kits fit Jeep Wrangler JK, JL, and Gladiator models, but double-check the product details.
Light Type
- LED lights are the most common. They’re bright, energy efficient, and last a long time.
- Some kits offer extra features, like running light or turn signal functions.
Wiring Method
- Plug-and-play kits connect directly to your existing brake light wiring. These are best for beginners.
- Hardwired kits may need more work and tools, but they can offer more control or extra features.
Durability
Look for weatherproof, corrosion-resistant materials. The light will face rain, mud, and sun.
Price And Warranty
You don’t need to buy the most expensive kit, but avoid the cheapest options. A good kit usually costs $30–$80 and comes with a 1-year warranty.
Example Comparison: Popular Spare Tire Light Kits
| Model | LED Count | Fitment | Wiring | Price (USD) |
|---|---|---|---|---|
| Rugged Ridge 11585.04 | 85 | JK/JL/Gladiator | Plug & Play | $55 |
| Hooke Road HR-LED-03 | 85 | JK/JL | Hardwire | $38 |
| Xprite 3rd Brake Light | 85 | JK/JL/JT | Plug & Play | $48 |
Tools And Materials You Need
Before starting, gather everything you need. This saves time and reduces frustration.
- Spare tire LED light kit (make sure it fits your Jeep and tire size)
- Flathead and Phillips screwdrivers
- Socket wrench set (commonly 13mm or 16mm sockets for tire carrier bolts)
- Wire strippers/crimpers (if your kit is not plug-and-play)
- Electrical tape or heat-shrink tubing
- Zip ties
- Cleaning rag
- Optional: Torque wrench for re-tightening bolts to factory specs
Tip: Check your kit’s instructions. Some include all tools and connectors, while others do not.
Step-by-step Installation Guide
Installing a spare tire light on a Jeep Wrangler is a project you can finish in about 1 hour. Here’s how to do it, clearly explained.
1. Remove The Spare Tire
Most Wrangler spare tire lights fit between the tire carrier and the spare tire. Start by taking the tire off.
- Use the correct socket to remove the three lug nuts holding the spare tire.
- Carefully lift the tire off the carrier and set it aside. It’s heavy—lift with your legs to avoid injury.
2. Clean The Mounting Surface
Dirt and rust can affect the light’s fit and wiring. Use a rag to wipe the area where the light will go.
3. Install The Spare Tire Light Ring
Most LED rings have a center hole for the tire carrier post and smaller holes for the lug bolts.
- Slide the LED ring onto the carrier, lining up the holes.
- Some kits include spacers or foam pads—use these if needed for a snug fit.
4. Route And Connect The Wiring
This is the most important step. There are two main wiring methods:
Plug-and-play Kits
- Find the connector for your stock third brake light.
- Unplug it, connect the new light’s plug, and then plug the stock light back in (if you’re keeping it).
- Secure loose wires with zip ties.
Hardwired Kits
- Use wire strippers to remove a small section of insulation from the positive (brake) and ground wires going to the stock third brake light.
- Connect the new wires using the included connectors or by crimping.
- Cover all connections with electrical tape or heat-shrink tubing for weather protection.
Pro Tip: Test the light before re-mounting the spare tire. Step on the brake pedal or ask a helper to check the light.
5. Reinstall The Spare Tire
- Lift the tire back onto the carrier, being careful not to pinch the new wires.
- Tighten the lug nuts evenly. If you have a torque wrench, tighten them to 50–60 ft-lbs.
6. Final Check And Cleanup
- Test the brake light again. It should be bright and clear.
- Make sure all wires are tucked away and zip-tied.
- Close the tailgate and check that nothing rubs or gets pinched.
Typical Installation Time Comparison
| Kit Type | Estimated Time (minutes) | Skill Level |
|---|---|---|
| Plug & Play | 30–40 | Beginner |
| Hardwire | 45–60 | Intermediate |
Common Mistakes And How To Avoid Them
Many first-time installers make similar errors. Here’s how to avoid them:
- Pinched Wires: When you put the tire back, wires can get squashed, causing shorts. Always double-check wire placement.
- Loose Connections: If you don’t secure the wiring, your light may flicker or fail. Use electrical tape or heat-shrink tubing.
- Wrong Fitment: Some kits don’t fit all tires or carriers. Always check compatibility before buying.
- Skipping the Test Step: If you don’t test before remounting the tire, you might have to remove it again.
Extra Tips For A Professional Result
- Use dielectric grease on electrical connectors to prevent corrosion.
- Upgrade your third brake light bracket if you use oversized tires—some brackets move the light higher for better visibility.
- For off-road use, consider a kit with a dust-proof rating (IP67 or higher).
- Hide wires inside the tire carrier if possible for a clean look.
- Take photos before you start, so you remember how everything fits together.
When To Call A Professional
While most Jeep owners can handle this project, sometimes it’s better to ask for help. Call a mechanic or auto electrician if:
- You see sparks or smell burning during wiring.
- Your Jeep’s brake lights stop working after installation.
- You’re not comfortable with electrical work.
A shop will usually charge $50–$100 for this installation, depending on your location.
Legal And Safety Considerations
Many states require a visible, working third brake light for SUVs like the Jeep Wrangler. If your spare tire or tire cover blocks the original light, you could get a fine.
Always check your local vehicle codes to stay legal.
Installing a bright, DOT-approved spare tire light increases your safety. In 2022, the NHTSA reported that rear-end collisions made up about 29% of all crashes in the US. Better brake light visibility can make a real difference.
For more information on US vehicle safety standards, check the NHTSA Lighting Standards.
Spare Tire Light Maintenance
After installation, you won’t need much maintenance, but it’s smart to check the light every few months.
- Inspect the wiring for cracks or wear.
- Clean off mud or dust with a soft cloth.
- Replace the light if you notice flickering or dimming.
If you often drive off-road, check the light after rough trips. LED lights last a long time, but connectors can loosen.
Example: Led Life Expectancy
| Light Type | Average Life (hours) | Typical Use (years) |
|---|---|---|
| Standard LED | 30,000–50,000 | 7–10 |
| Halogen Bulb | 1,000–2,000 | 1–2 |
Frequently Asked Questions
How Do I Know If My Jeep Needs A Spare Tire Light?
If you’ve installed larger tires or a different tire carrier, check if your stock third brake light is blocked. If you can’t see it clearly from behind, you should add a spare tire light for safety and to avoid tickets.
Can I Use The Spare Tire Light As A Running Light Or Turn Signal?
Some kits offer extra features like running lights or turn signals, but most are brake-only. Always follow your local laws adding extra lights can be illegal in some areas.
Will Installing A Spare Tire Light Void My Jeep’s Warranty?
Generally, adding a simple plug-and-play light will not void your warranty. If you cut wires or damage the electrical system, it might.
Read your warranty terms or ask your dealer if you’re not sure.
What If My Brake Light Stays On After Installation?
This usually means a wiring mistake or a short. Double-check your connections.
If you can’t find the problem, remove the light and restore the original setup, then consult a professional.
How Can I Make My Spare Tire Light Last Longer?
Keep the connectors clean and dry. Use dielectric grease if you drive in wet or salty areas.
Check the wiring regularly, especially if you go off-road.
Adding a spare tire light to your Jeep Wrangler is a smart upgrade that boosts safety and style. With the right kit and careful installation, you’ll enjoy a brighter, safer ride on and off the road.
Take your time, follow the steps, and don’t be afraid to ask for help if needed.
Your Jeep and everyone behind you will thank you.
