How to Change Your Headlight Bulb in 5 Minutes

Your car's headlights are one of the most important pieces of safety equipment on the vehicle. If one or both of the bulbs have burned out, you may be fined by the police or worse, end up in a collision. Even if the lights are in good working order, you may want to upgrade to a more powerful bulb if you do a lot of driving at night or live in an area with bad weather. 

Checking your car's headlights is as easy as turning them on and then looking at them to make sure both bulbs working. Finding out what type of replacement bulb isn't much harder. Check your owner's manual first. If you can't find the information there, you can find it at your local auto-parts store. All you need to know is the year, make, and model of your vehicle.

This tutorial shows you how to replace the lights found in most halogen systems where the bulb is loaded into the back of the lens. If your car has sealed-beam headlights, this won't help (but that job is super easy, too). If your actual headlight glass needs to be replaced, you'll need to know how to replace the headlight lens. 

In many instances, you won't need any tools to replace your vehicle's headlight bulb, but you may need a pair of pliers or a screwdriver. Check your owner's manual first. Make sure your vehicle is turned off and parked in a location where you can work safely. Open the hood of the car, locate the back of the headlight, and find the bulb holder. It will have three wires coming out of a plug that is shaped like a trapezoid.

The three wires are attached to a plug that is at the base of the headlight itself. This plug will be held in by a plastic catch, a metal clip, or in some cases a screw cap.

• For a plastic catch, you'll see a little lever sticking up at the top of the plug. Press down with your thumb while pulling firmly but gently on the plug. It should slide off.​
• For a metal clip, just pull up and away and it will come off in your hand. ​
• For a screw cap, simply unscrew it by turning it counter-clockwise (the old righty-righty/lefty loosey might get confusing since you are doing the reacharound.)

With the wiring out of the way, you should be able to pull the bulb out by holding onto the base (the thing that the plug was in). In some cases, you may have to rotate the bulb slightly for it to release or gently wiggle it to loosen it.

Before you take the new bulb out of the packaging, grab a tissue or a clean rag. If the oils on your skin get on the glass bulb, it can burn out. If you must touch the glass, do so with the tissue. Holding the bulb's plug end, stick it into the back of the headlight. Be sure to visually confirm that it's all the way in. You can tell because it will be lined up evenly and none of the bulb's rubber gasket will be showing.

Plug the wiring back in and re-secure the bulb. Testing your new headlight bulbs is as simple as turning on your car's headlights. If one or both of the bulbs don't turn on, check the wiring to make sure you're securely connected them. Have a bad tail light or turn signal bulb? You can replace those bulbs, too!