Headlights Stay On When Car Is Off – What Might Be The Reason?

How frequently do you think about your headlights? I am pretty sure that’s not much. You expect everything to shut down when you switch off your car.

When the headlights don’t go off, it means something is not right. The only thing you can think about right now is the headlights.

This is a common occurrence in cars. Nothing can be in perfect condition forever. It’s wise to be aware of the weaknesses that you may face in the future.


Possible Reasons

After the engine is switched off, why would your lights still be on? Is there anything you can do about it? Three probable causes and how you can deal with them are listed here.

Faulty Headlight Relay

The headlight is connected to the engine through a relay. A relay sends a message to the engine when you switch on your lights.

The link will stay that way until the relay is fixed when the headlights are on. To check if the relay is malfunctioning, gently tap on it.

The relay is the biggest problem if the light goes off. The relay will have to be replaced to remedy this.

Defective Engine Timer

You can automate the headlights instead of having to manually switch them on and off. The alternative for cars is to have headlights go off after the engine is turned off.

The lights will stay on if the timer doesn’t work correctly. If this happens, try to use parking brakes to cause the headlights to go off.

Headlights Filling with Water

The headlights create heat when they are on. Condensation will occur when you switch them off because the air outside starts cooling faster than the inside.

The headlights may start filling with water. Water could get inside if the headlight had a crack or worn-out seal.

The water can get inside the car when it rains or when an oncoming car splashes water. If the damage is fixable, you should replace the seal or crack. You will have to buy a new one if not.

The fogginess which will affect the effectiveness of the headlights will be caused by Procrastinating to fix this.

Over time, the wiring and bulbs in the headlights will be damaged by the water.

Headlights Not Working

When both of the headlights are not working, you can’t suspect a burnt bulb. A burst bulb is an easy problem to solve because you can change it yourself.

It’s most likely a wiring problem in this case. If this happens, you should seek professional assistance.

How To Take Care of Your Headlights?

Do a Routine Check-up

If you have regular check-ups, you will be able to notice if something is wrong sooner.

It will make sure you don’t have any surprises. If you have to replace your headlight, you will do it before that.

Clean Them Regularly

The dirt that builds up on your headlights can block the light from being adequately illuminated. If it is rainy or misty, this will affect your visibility.

How Can I Restore Headlights?

When headlights wear out, you can consider restoring them instead of replacing them. Here are a few things you can do at home to get this.

  • Add baking soda to the water and apply it to the headlight using a sponge, then rinse it with warm water.
  • Put toothpaste and baking soda in a container and use a toothbrush on the headlights. Continue to scrub until you can see the mixture getting dirty, then leave to dry. After it is dry, rinse it off with warm water and a cloth.


It has been learned that headlights are an indispensable part of a vehicle.

They have to be functioning correctly for you to be interested. Fix them asap to avoid accidents if they don’t work as they are supposed to.

There is no need to be concerned about the headlights remaining on after the engine has been switched off.

Since they will drain the battery and just pile up on the things you need to fix, it would be best to have them checked out as soon as possible!

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