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The Land Rover Defender 90 is a legendary off-road vehicle that can stand the test of time, but over the years, its headlights may start to dim or wear out. Replacing the Defender 90 headlights is a relatively straightforward process that can improve visibility and safety during your adventures. In this tutorial, we'll walk you through the steps to replace the headlights on your Defender 90.

Tools and Parts You'll Need:

- New headlight bulbs (compatible with your Defender 90 model)
- Screwdriver
- Socket and ratchet set
- A clean cloth
- Optional: gloves

Step 1: Prepare Your Workspace

Start by parking your Defender 90 on a level surface and turning off the engine. Ensure the headlights are also turned off. You may want to wear gloves during this process to avoid getting fingerprints on the new bulbs, which can reduce their lifespan.

Step 2: Open the Hood

Pop the hood of your Defender 90 and secure it in the open position. This will give you access to the back of the headlight assemblies.

Step 3: Remove the Headlight Housing

Look for the headlight housing at the front of the engine bay. There are usually three or four retaining screws or clips securing the headlight housing to the vehicle. Use a screwdriver, socket, or ratchet to remove these screws or clips, allowing you to access the back of the headlight.

Step 4: Disconnect the Wiring

Once you have access to the back of the headlight, you'll find the wiring harness connected to the bulb socket. Gently disconnect the wiring harness by pressing or squeezing the release tab, if applicable.

Step 5: Remove the Old Bulb

Carefully remove the old headlight bulb from its socket. You may need to twist it counterclockwise or release a spring clip, depending on your specific model. Use a clean cloth or gloves to handle the new headlight bulb to prevent oils from your skin from transferring to the glass, which can cause hot spots and reduce bulb life.

Step 6: Install the New Bulb

Insert the new headlight bulb into the socket, making sure it's correctly oriented. You'll often hear or feel a slight click when it's securely in place. Be gentle when installing the new bulb.

Step 7: Reconnect the Wiring

Reconnect the wiring harness to the new bulb by firmly pressing or snapping it into place. Ensure it's secure and that there's no play in the connection.

Step 8: Reattach the Headlight Housing

With the new bulb in place, reattach the headlight housing to the vehicle by replacing the retaining screws or clips you removed earlier.

Step 9: Test the Headlights

Turn on your Defender 90's headlights to check if the new bulb is functioning correctly. Ensure both high and low beams are working, and that the bulbs are properly aligned. Make any necessary adjustments to the headlight aim if needed.

Step 10: Close the Hood

After confirming that your new headlight is functioning correctly, lower the hood and secure it in place. Your Defender 90 is now equipped with fresh, reliable headlights ready to light your way on your next adventure.

Replacing the headlights on your Defender 90 is a manageable task that can be accomplished with basic tools and a little patience. It's a valuable maintenance step to ensure you have excellent visibility during your travels, both on and off the road.