Step-by-Step Tutorial on How to Adjust Headlights on 2018 Jeep Wrangler JL

The 2018 Jeep Wrangler JL is a popular choice for off-road enthusiasts, and for good reason. Its rugged build, powerful engine, and impressive off-road capabilities make it a true adventure vehicle. However, like any vehicle, the Wrangler JL requires proper maintenance to ensure optimal performance and safety. One crucial aspect of maintenance is adjusting the headlights. Properly adjusted headlights are essential for safe driving, especially at night.

Why Adjust Headlights?

Misaligned headlights can pose several dangers:

• Reduced Visibility: Dim or misaligned headlights can significantly reduce visibility at night, making it difficult to see obstacles and other vehicles.
• Glare for Oncoming Drivers: Headlights pointed too high can blind oncoming drivers, creating a dangerous situation.
• Inefficient Lighting: Headlights that are not properly aimed may not illuminate the road effectively, potentially leading to accidents.

Tools and Materials Needed

Before you begin, gather the following tools and materials:

• Phillips head screwdriver
• Flathead screwdriver
• Measuring tape
• Level
• Masking tape
• Pen or marker
• Work light (optional)

Preparing Your Wrangler JL

1. Park on a Level Surface: Find a flat, level surface to park your Wrangler JL. Make sure the vehicle is parked at least 25 feet away from a wall or other object.
2. Turn on the Headlights: Turn on your Wrangler JL‘s headlights and leave them on for at least 15 minutes to allow the bulbs to warm up. This ensures accurate adjustment.
3. Adjust Vehicle Height: If your Wrangler JL has a lift kit or other modifications that affect its height, adjust the vehicle’s height to its stock setting.

Adjusting the Headlights

1. Locate the Headlight Adjustment Screws: The adjustment screws are usually located on the back of the headlight assembly. They are typically marked with arrows or symbols indicating the direction of adjustment.
2. Mark the Center of the Headlights: Use masking tape and a pen or marker to mark the center of each headlight. This will serve as a reference point for adjustment.
3. Measure and Mark the Target Height: Using a measuring tape, measure the distance from the ground to the center of each headlight. This should be approximately 30 inches. Mark this height on the wall or object you are using as a reference.
4. Adjust Vertical Alignment: With the headlights on, stand at a distance of 25 feet from the wall or object. Use the level to ensure that the center of each headlight beam is aligned with the marked target height. If the beam is too high, turn the vertical adjustment screw counterclockwise. If the beam is too low, turn the screw clockwise.
5. Adjust Horizontal Alignment: The horizontal adjustment screw controls the left-to-right direction of the beam. To adjust the horizontal alignment, stand at the same distance from the wall or object. Use the level to ensure that both headlights are aligned horizontally. If necessary, turn the horizontal adjustment screw clockwise to move the beam to the right and counterclockwise to move the beam to the left.

Verifying the Adjustments

After making adjustments, turn off the headlights and walk back to the vehicle to visually inspect the alignment. The beam should be directed slightly downward and slightly to the right. Repeat the adjustment process until the headlights are properly aligned.

Final Touches and Safety Tips

1. Test Drive: After adjusting the headlights, take your Wrangler JL for a test drive at night to ensure the adjustments are satisfactory.
2. Regular Checks: It’s a good practice to check your headlight alignment periodically, especially if you have recently driven on rough terrain or encountered bumps that could have shifted the headlights.
3. Professional Assistance: If you are unsure about how to adjust your headlights, consider seeking professional assistance from a qualified mechanic.

After Adjusting: The Importance of Proper Bulb Choice

Once you have adjusted your headlights, it is crucial to ensure you are using the correct bulbs for optimal visibility. Using the wrong bulbs can lead to inadequate illumination or even damage to your headlight assembly.

• Bulb Type: The 2018 Jeep Wrangler JL uses H11 bulbs for the low beam and H9 bulbs for the high beam.
• Brightness: Consider using bulbs with a higher lumen output for improved visibility at night. However, be sure to check your Wrangler JL’s owner’s manual for recommendations on maximum allowable lumen output.
• Color Temperature: While some drivers prefer the bright white light of 6000K bulbs, it is important to note that they can sometimes be too harsh for night driving. A more balanced choice might be a 4300K bulb, which offers a warmer and less harsh light.

Answers to Your Questions

Q: Can I adjust the fog lights on my 2018 Jeep Wrangler JL?

A: Yes, you can adjust the fog lights on your Wrangler JL. However, the adjustment process may vary slightly depending on the specific model year and trim level. Consult your owner’s manual for detailed instructions.

Q: How often should I adjust my headlights?

A: While there’s no set timeframe, it’s a good idea to check your headlight alignment every 6 months or after any major impact or rough driving.

Q: What if my headlights are still misaligned after adjusting them?

A: If your headlights are still misaligned after adjusting them, there may be a more serious issue, such as a damaged headlight assembly or a problem with the adjustment mechanism. It’s best to consult with a qualified mechanic for further diagnosis and repair.

Q: Can I adjust my headlights myself?

A: While adjusting headlights can be done yourself, it requires some technical skill and knowledge. If you are not comfortable with the process, it is best to seek professional assistance.

Q: Are there any other factors that can affect headlight performance?

A: Yes, several factors can impact headlight performance. These include:

• Dirt and Debris: Dirt and debris on the headlight lenses can significantly reduce light output. Clean the lenses regularly with a microfiber cloth and a mild cleaning solution.
• Aging Bulbs: Over time, headlight bulbs can lose their brightness and efficiency. Replace aging bulbs with new ones for optimal illumination.
• Weather Conditions: Heavy rain, snow, or fog can affect visibility, making it even more important to have properly adjusted and functioning headlights.

By following this guide, you can ensure your 2018 Jeep Wrangler JL‘s headlights are properly adjusted for optimal visibility and safety on the road. Remember to check your headlights regularly and be prepared to adjust them as needed.