What are the Three Prongs on a Headlight

If you have ever wondered what those three prongs on a headlights are for, so don’t be wonder. They are actually part of the headlight’s aiming system and are used to make adjustments to the beam pattern. The three prongs are called the “horizontal adjuster,” “vertical adjuster,” and “beam height adjuster.”

What are the 3 Headlights?

Most cars on the road today have four headlights. However, there are still a few out there with three. So, what are the three headlights?

The three headlights are actually a holdover from an earlier time. Cars used to only have two headlights, but then someone had the bright idea to add a third one in the middle. This was done for a variety of reasons, but mostly because it looked cool and made the car stand out from the crowd.

However, there were some drawbacks to having three headlights.

They didn’t provide as much light as two headlights did. Additionally, they tended to blind oncoming traffic and cause accidents.
As a result, many countries began outlawing them and eventually they disappeared altogether. These days, you’re unlikely to see a car with three headlights on the road. But if you do, you can be sure that it’s an older model that’s been around for quite some time!

Ground on a Sealed Beam Headlight

If your headlights are looking a little dull, you may be wondering if you can just ground them on a sealed beam headlight. The answer is yes, you can! However, there are a few things to keep in mind before you get started.

First of all, it’s important to make sure that the area around the headlight is clean and free of debris. You don’t want anything to get in the way of the grinding process. Once the area is prepped, you’ll need to choose the right abrasive material.

We recommend using sandpaper or a wire brush for this project. You’ll also need some sort of lubricant – water or WD-40 will work fine. Now it’s time to start grinding!

Begin with coarse grit sandpaper (60 or 80 grit) and work your way up to finer grits (100-120). Be sure to apply even pressure as you move the paper back and forth across the lens. After a minute or two of grinding, wipe away any excess lubricant and check your progress.

If necessary, continue grinding until you’re happy with the results.

How Many Prongs are on a Low Beam Headlight?

There are typically two prongs on a low beam headlight. One is for the ground wire and the other is for the low beam power wire.

What are the Parts of a Headlight Assembly?

A headlight assembly is typically made up of a few different parts. There’s the headlight itself, of course, which is usually a sealed beam unit. There are also the reflectors, which are what bounce the light from the headlight off of to create a bright, focused beam.

The lens is what covers and protects the headlight, and then there are usually some adjustment screws so that you can aim the headlights properly.


Most headlights have three prongs: two for the low beam and one for the high beam. The low beam is usually the brightest setting on a headlight, while the high beam is used for extra light when needed, such as when driving in fog or at night.