What is a headlight closure relay?
A headlight closure relay is an electronic component that helps the headlights open and close—but few cars have them these days.
Without a headlight closure relay, you may not be able to open up your headlights when you need to use them. This can be dangerous at night and in low-visibility conditions.
When should I replace the headlight closure relay on my car?
You may need to replace your headlight closure relay if you notice the following common symptoms:
Headlights won’t open: If your headlight closure relay has failed, your headlights will no longer pop up or the covers won’t be able to open.
Headlights won’t close: If your headlights stay stuck open, there may be an electrical problem related to the headlight closure relay. If your headlights themselves are still able to turn on, this could make a headlight closure relay problem likelier.
Headlight covers work inconsistently: If your headlights only open and close some of the time, or they do so on their own, there might be an electrical problem somewhere in the system. A faulty headlight closure relay would be one potential culprit.
Keep in mind: These symptoms could also be connected to problems other than a faulty headlight closure relay. A certified mechanic should be able to help you determine the root cause of your vehicle’s specific problem.
How often should a headlight closure relay be replaced?
A headlight closure relay could last the life of your vehicle—but like any electrical component, it’s not immune to failing prematurely.
If you own a vintage car that sports headlight doors, you might have to replace the headlight closure relay at some point to keep using them.
Can I replace my headlight closure relay myself?
Drivers with moderate technical know-how might be able to replace headlight closures on their own. If you don’t feel confident in your knowledge or ability, reach out to a certified mechanic to take care of the job for you.
Vintage car owners may want to track down a mechanic who specializes in work on the specific make or model. They may have better access to the part you’ll need—and the experience to install it properly.