Daytime running lights (DRL) are a convenient feature on many vehicles, but if they’re not working properly it can be frustrating.
There are a few common causes of DRL failure, and we’ll detail each one below. If you think your DRL is not working properly, take some steps to diagnose and fix the problem.
Some common causes of DRL problems include broken light bulbs, blown fuses, incorrect wiring, or corroded connectors.
Most likely, a burned out bulb or bad switch is to blame for a malfunctioning daytime running light.
Now, if you notice that your DRL isn’t working properly, take the time to fix the problem before it becomes more serious.
What are The Causes of DRL not Working?
If your DRL light came on, there’s a good chance that the light is malfunctioning. This indicator usually comes on when you’re driving in low or no-light conditions and tells you to turn off the headlights.
If the indicator isn’t working properly, it may cause your car to run erratically or not work at all.
If the daytime running lights (DRL) on your car are not working, there is a good chance that the electrical connector is loose.
This connection helps power the light and keep it connected to the battery. If it’s broken or missing, you’ll need to replace it before DRL can work properly again.
1. A loose electrical connector can be the cause of your daytime running lights not working. Electrical connectors are designed to make it easy for the wires that run between different parts of your car to stay connected.
When these connectors are not properly installed or they become loose, this can lead to problems with your headlights and other components in your system.
2. Faulty wiring may also be responsible for a lack of power being sent to your DRLs (daytime running lights). If there is an issue with the module that controls these lights, you will not be able to see them turn on when you hit the switch inside your car.
3. Poorly installed headlight bulbs may also prevent your DRLs from working correctly. If one or more of the light bulbs doesn’t have enough voltage going through it, then the DRL won’t work as intended and will just stay off all together..
4. Loose connections within switches and relays can also cause issues with daytime running lights (DRLs).
This occurs when something interrupts the normal flow of electricity and causes one part of a system to override another part.
In this case, it would disable any electric functions associated with Daytime Running Lights (DRLs) due to incorrect installation or damage caused by water etc.
5. In extreme cases where everything else has been ruled out as a possible problem – such as faulty wiring – replacing either or both electrical connectors could fix things up.
How to Fix Daytime Running Lights Not Working?
It’s easy to check your headlights, fog lights, or taillights if they’re out. Check if they work by turning on the switch.
However, daytime running lights don’t always have a switch. When it’s not sunny outside, checking the DRL is easier.
Check the daytime running lights by following these steps:
1. Make Sure The Ambient Light Sensor Is Working
The ambient light sensor is located on the dashboard. It operates with automatic lighting functions, reads the outdoor light, and decides whether to turn on the daytime running lights or, if it’s darker outside, turn on the headlights.
Sensors can be on the outside or inside of the dashboard, and they probably look like half-domes.
Make sure the ambient light sensor is not covered by anything. In the event that it is covered by objects, the sensor will not be able to read the light, which will prevent the DRL from working, which will lead to an early failure of the headlights.
If it’s sunny outside, shine a very bright light on the sensor to check it. There may still be a need for a flashlight even in buildings or areas that have bright lights, such as a garage.
Make sure the headlights are off by turning on the key and holding the flashlight over the sensor. If the ambient sensor is working, the headlights shouldn’t come on when the light is over it.
2. Check If The DRLs Are On With An Assistant
If the transmission is in Drive, Reverse, or Neutral, the DRL will turn on. When doing this, it is helpful to have an assistant watch the headlights. In the absence of an assistant, chock the wheels to keep the car from rolling.
It may be necessary to run some vehicles for the DRLs to turn on, while other vehicles may require the e-brake to be depressed.
Make sure the DRL work with the vehicle in conditions where it will turn on.
Ensure that the bulb, socket, and switch are working if one DRL is working
Most likely, the burnt out bulb or faulty switch is the cause of one out of two daytime running lights not working.
Make sure the filament is burned out by removing the socket from the light and looking at the bulb. If it is dark, the bulb needs to be replaced.
Since DRL can run for a long time, inspect the socket for burns or melting, and replace it if necessary. Make sure the contact point of the bulb is not melted.
Troubleshooting: Both Daytime Running Lights Not Working
If neither daytime running light is working, check the fuse. The electrical circuit could be affected by another problem, such as faulty sockets or wiring. Alternatively, the ambient sensor may be disconnected or malfunctioning.
Blown Out Fuse
If your daytime running lights are not working, there is a good chance that the fuse has blown.
The fuse panel is usually located near the battery or under the hood on most cars and trucks To test whether or not the fuse has blown, you can use an ohmmeter to measure resistance between terminals across the fuses.
If it’s low (less than 10), then replace one of the fuses with a 20-amp unit.
Be sure to label each terminal with a corresponding letter so that you don’t accidentally replace a high-amperage fuse with one that doesn’t have enough power.
Finally, turn off all electrical accessories in your car before replacing any fuses so as not to overload circuits
DRL Socket is Damaged
If your daytime running lights (DRL) are not working, it is likely that the socket on your vehicle is damaged. You can replace the DRL socket yourself or take it to a mechanic for repair.
Make sure you have all of the necessary tools and parts before beginning the repair process. Be prepared to spend time troubleshooting if everything fails during installation or repairs.
It’s also a good idea to check other electrical components in your car such as headlights and turn signals to ensure they are functioning properly as well-especially if there has been recent rain or snowfall in your area which could result in water damage inside of vehicles.
If replacing the socket doesn’t solve the problem, then it may be necessary to replace one or more light bulbs themselves-a costly but necessary fix.
Electrical Wiring Corrosion
Electrical wiring corrosion can be a major problem in your home if you’re not aware of it. Daytime running lights (DRL) are often the first part of an electrical system to corrode and fail.
If you experience flickering, humming, or no light at all when turning on your DRLs, there’s a good chance they’re malfunctioning due to corrosion.
Check the wires for tightness and fraying; both can indicate wire deterioration that’s causing problems with your DRLs.
Corrosion is caused by moisture infiltration into electrical systems through cracks or openings in walls and ceilings, as well as from water seeping from faulty appliances or drains near fixtures .
To prevent this problem from happening in the first place, keep proper insulation levels around wires and seal any leaks where possible.
Once the damage has been done, replacing failing parts may be unavoidable – but taking steps now will help minimize future issues down the road.
Ambient Light Sensor Not Working
If your daytime running lights are not working, there may be a problem with the ambient light sensor.
In order to test if this is the case, you can remove and replace the sensor. If that does not work, then there may be an issue with power supply or wiring in the vehicle.
After testing all of these options, you may need to contact a mechanic for assistance in resolving the issue.
However, before doing so it is important to troubleshoot first by checking fuses and connections etc. as we said before.
Check Your Bulb
One of the most common reasons that a DRL light comes on is because of a faulty bulb.
When your headlights are turned on, they send an electrical signal to your car’s computer.
This signal tells the car how bright to make each individual headlight. If there is a problem with one of these bulbs, it can cause the DRL light to come on when you turn your headlights on.
Test Fuses or Relays
If you’re not sure what caused the DRL light to come on, it may be worth checking for blown fuses or broken relays. These kinds of problems can often result in intermittent power issues and flashing lights in your car’s dashboard notification area (DRL).
Clear Any Obstructions From The DRL Light Path
If you’ve replaced a broken light module and still have problems with the DRL coming on, there could be something blocking its proper pathway inside your vehicle.
Try removing any bags or boxes that might be in front of the headlight assembly and see if that fixes things up.
Replace a Broken Light Module
If all other troubleshooting methods fail, it might be time to replace one of your car’s broken lighting modules this will usually fix whatever was causing the original issue with the DRL indicator going off intermittently.
If you’ve determined that the light comes from either the headlight or DRL unit, test whether or not the switch is turned on by flipping it open and closing it several times. This will help determine which part of your car needs attention.
Replace Bulb if Necessary
If testing shows that one of your bulbs is faulty and needs to be replaced, do so before continuing with any other repairs on this vehicle. Replacing a bad bulb can save you time and money down the road.
Repair Strategy for Headlights
Headlights are usually easy to repair- just remove them and replace them with new ones.
For more difficult repairs like broken seals or blown out lenses, we may need to replace both headlights together as a set (this would require removing both front bumper fascia panels).
Alternatively, we might only need to replace one side of an exploded lens while leaving intact LEDs around edge (which means no drilling required.
Finally, sometimes all that’s necessary is some sealant/lube applied where dirt collects- these fixes generally don’t require anything else but patience.
There are a few potential causes of daytime running lights not working, but the most common is that your light bulb has burned out.
If you have recently replaced your light bulbs or if there seems to be something wrong with the wiring, it might be worth checking out before concluding that the LED lights aren’t working.