Ever driven at night and felt like your headlights were either pointing too high, blinding oncoming drivers, or aimed too low, leaving you struggling to see the road ahead? If so, you're not alone! Properly aligned headlights are crucial for safe nighttime driving, and luckily, adjusting them on your 2017 Ford Expedition is a task you can often tackle yourself. We'll walk you through the process, step-by-step, so you can get back to driving with confidence and clear visibility.
Why Bother Adjusting Your Headlights Anyway? It's More Important Than You Think!
Misaligned headlights aren't just a minor annoyance; they're a safety hazard. Think about it: if your headlights are aimed too low, you're reducing your visibility range, giving you less time to react to potential obstacles in the road. Conversely, if they're aimed too high, you're blinding other drivers, increasing the risk of an accident. Here's a quick breakdown of why proper headlight alignment matters:
- Improved Visibility: See farther and clearer at night, giving you more time to react to hazards.
- Reduced Glare: Avoid blinding oncoming drivers, making the road safer for everyone.
- Enhanced Safety: Minimize the risk of accidents caused by poor visibility.
- Legal Compliance: In some areas, misaligned headlights can result in a traffic violation.
Gathering Your Tools: What You'll Need
Before you dive in, gather the necessary tools. The good news is you probably already have most of them! Here's what you'll need:
- A Phillips head screwdriver: This is the most common tool for adjusting headlights.
- A measuring tape: You'll need this to measure distances accurately.
- Masking tape: For marking the wall.
- A level ground surface: Essential for accurate alignment. A garage floor or a flat driveway works well.
- A blank wall: A garage door or a large, flat wall is ideal.
- A helper (optional but recommended): Having someone to sit in the driver's seat while you adjust the lights can be very helpful.
Getting Ready: Preparing Your Expedition and the Aiming Surface
Now that you have your tools, let's prepare your 2017 Expedition and the aiming surface:
- Park on a Level Surface: Make sure your vehicle is parked on a level surface, facing a blank wall. The wall should be at least 25 feet away.
- Check Tire Pressure: Ensure your tires are properly inflated to the recommended pressure (check the sticker on your driver's side doorjamb).
- Empty the Vehicle: Remove any unnecessary weight from the vehicle, such as cargo in the trunk or passengers. This will help ensure accurate alignment.
- Bounce the Suspension: Push down on the front of the vehicle several times to settle the suspension.
- Measure Headlight Height: Measure the distance from the ground to the center of each headlight lens. Write these measurements down. They should be roughly the same.
- Mark the Wall: Using your measuring tape and masking tape, mark two horizontal lines on the wall:
- The first line (upper line): Should be the same height as the headlight centers you just measured. This represents the horizontal aim of your headlights.
- The second line (lower line): Should be 3 inches below the first line. This represents the desired drop for your headlight beam at 25 feet.
- Mark Headlight Centerlines: Measure the distance between the center of each headlight lens. Transfer this measurement to the wall and mark two vertical lines, representing the center of each headlight.
Finding the Adjustment Screws: Where Are They Hiding?
The location of the headlight adjustment screws can vary slightly depending on the vehicle model. On the 2017 Ford Expedition, they're typically located near the headlight assembly, often accessible from the engine compartment.
- Open the Hood: Pop the hood of your Expedition.
- Locate the Adjustment Screws: Look for small screws or knobs near the headlight assembly. There will typically be two screws for each headlight: one for vertical adjustment (up and down) and one for horizontal adjustment (left and right). They're often marked with arrows indicating the direction of adjustment. Consult your owner's manual if you're having trouble locating them.
- Identify Vertical and Horizontal Adjusters: The vertical adjuster usually sits on top or the side of the headlight housing. The horizontal adjuster is typically located on the side or back.
Important Note: Be gentle when adjusting the screws. Forcing them can damage the headlight assembly.
The Adjustment Process: Time to Fine-Tune Your Lights!
Now for the main event: adjusting your headlights!
- Start with the Low Beams: The low beams are the most important for everyday driving, so start with those.
- Adjust Vertical Aim: Using your Phillips head screwdriver, turn the vertical adjustment screw. Observe the headlight beam on the wall. You want the brightest part of the beam to be centered on the lower line you marked earlier (3 inches below the headlight height).
- Adjust Horizontal Aim: Next, adjust the horizontal adjustment screw. You want the brightest part of the beam to be centered on the vertical line you marked for that headlight.
- Repeat for the Other Headlight: Repeat steps 2 and 3 for the other headlight.
- Test and Fine-Tune: After adjusting both headlights, take your Expedition for a short drive at night. Pay attention to how well you can see the road and whether you're blinding oncoming drivers. If necessary, return to your aiming surface and make further adjustments.
- Adjust High Beams (Optional): If you want to adjust your high beams, repeat the process, but aim the brightest part of the beam slightly higher and wider than the low beams. Remember, high beams are primarily for use in areas with no oncoming traffic.
Pro Tip: Make small adjustments and re-evaluate after each adjustment. It's easier to fine-tune the aim gradually than to make large adjustments and overshoot the mark.
Common Mistakes to Avoid: Don't Fall into These Traps!
Adjusting headlights is a straightforward process, but there are a few common mistakes to avoid:
- Adjusting on an Uneven Surface: This will throw off your alignment and make it impossible to achieve accurate results.
- Forcing the Adjustment Screws: This can damage the headlight assembly. If the screws are stuck, try lubricating them with a penetrating oil.
- Over-Adjusting: Make small adjustments and re-evaluate after each adjustment.
- Ignoring Tire Pressure and Vehicle Weight: These factors can affect the vehicle's ride height and headlight aim.
- Not Consulting the Owner's Manual: Your owner's manual may contain specific instructions for adjusting the headlights on your 2017 Ford Expedition.
When to Seek Professional Help: Know Your Limits
While adjusting headlights is often a DIY project, there are times when it's best to seek professional help:
- If you're uncomfortable working on your vehicle.
- If you can't locate the adjustment screws.
- If the adjustment screws are broken or damaged.
- If you've tried adjusting the headlights yourself and are still not satisfied with the results.
A professional mechanic has the tools and expertise to accurately align your headlights and ensure they meet safety standards.
Frequently Asked Questions (FAQ)
- How often should I adjust my headlights? You should check your headlight alignment at least once a year, or whenever you notice a change in visibility or after a minor collision.
- What happens if my headlights are misaligned? Misaligned headlights can reduce visibility, blind other drivers, and increase the risk of accidents.
- Can I adjust my headlights myself? Yes, in many cases, you can adjust your headlights yourself with basic tools.
- Where are the headlight adjustment screws located? They're typically located near the headlight assembly, often accessible from the engine compartment. Consult your owner's manual for the exact location.
- What tools do I need to adjust my headlights? You'll typically need a Phillips head screwdriver, a measuring tape, masking tape, and a level ground surface.
Wrapping It Up: Drive Safe and See Clearly!
Adjusting your headlights on your 2017 Ford Expedition is a simple yet important task that can significantly improve your nighttime driving safety. By following these steps, you can ensure your headlights are properly aligned and providing optimal visibility. Drive safely and enjoy the road ahead!