What are Daytime Running Lights (DRL)?
Daytime running lights, or DRL, have been implemented in many places around the world as an added safety measure for cars. These lights help to make cars more visible in low light situations and show that the engine is running. Systems like the daytime running lights are designed to keep you from getting into an accident so it’s important to know the warning signs that indicate their failure.
What Does the DRL Light Mean?
Every manufacturer does things a little bit differently so refer to the owner’s manual for any specific information regarding your vehicle. Usually, if the DRL light is on, it indicates that the computer has detected an issue. When you start the engine, the DRL light will come on for a few seconds or until you release the parking brake. This light should turn off afterwards once the system verifies that everything is working as intended. Typically, a faulty bulb may be the culprit, but there are fuses and relays in the circuit that can cause similar issues. Keep in mind that some systems will leave this warning light on to tell the driver that the lights are on.
Common Causes of the DRL Light
The DRL warning light may illuminate due to various common triggers, which often include issues with the bulbs, wiring, or sensors associated with the DRL system. Burnt-out bulbs are a frequent culprit, and a thorough inspection of all DRL bulbs is typically the first step in diagnosing the problem. Additionally, wiring issues, such as frayed or damaged wires, can disrupt the electrical flow to the DRLs, triggering the warning light. Malfunctioning sensors that monitor the DRL system may also inaccurately detect faults, leading to the illumination of the warning light.
Diagnosing the DRL Problem
When the DRL warning light appears on the dashboard, conducting diagnostic procedures can help pinpoint the underlying cause. Begin by visually inspecting the exterior lights, focusing on the DRL bulbs to check for signs of damage or wear. If the bulbs appear intact, the next step involves examining the fuse box to ensure that the DRL fuse is not blown. Beyond visual inspections, using a multimeter to test the continuity of wiring and voltage output at various points in the DRL circuit can provide valuable diagnostic information. Additionally, accessing the vehicle's onboard diagnostic system with a compatible scanner can retrieve error codes associated with the DRL system, guiding further troubleshooting efforts. While it’s possible to diagnose a DRL problem by yourself, we recommend seeing a mechanic to get a professional inspection.
How to Fix the DRL Light
Resolving issues with the DRL system often involves straightforward repair and maintenance tasks. For instance, if a burnt-out bulb is the culprit, replacing it with a new, compatible bulb can restore the DRL. Likewise, addressing wiring issues may require repairing or replacing damaged wires and connectors to ensure a secure electrical connection. Regular maintenance practices, such as cleaning the DRL lenses to remove dirt and debris, can also prolong the lifespan of DRL components and prevent issues from arising. Following manufacturer recommendations for bulb replacements and using high-quality replacement parts can contribute to the long-term reliability of the DRL system. It’s possible to fix the DRL problem by yourself, but we recommend reaching out to a professional mechanic to ensure nothing goes wrong when repairing.
Is it Safe Driving with the DRL Light On?
Even if the light is warning you of a fault, the car is still pretty safe to drive. As long as your car’s normal headlights are working, you have nothing to worry about. You should still have the warning light investigated by a professional as there could be a worse problem developing.
Additional Comments Regarding the DRL Light
In cases where DRL issues persist despite troubleshooting efforts, seeking professional assistance from certified mechanics or automotive technicians is advisable. Mechanics have the expertise and specialized diagnostic equipment necessary to diagnose complex DRL problems accurately. They can conduct comprehensive inspections of the DRL system, identify underlying faults, and perform repairs or replacements as needed.
Additionally, professional technicians can ensure that DRL repairs comply with manufacturer specifications and safety standards, reducing the risk of future issues and ensuring optimal performance. If your daytime running lights are malfunctioning, book an inspection with one of our mobile mechanics in your area today to come to you and diagnose the DRL Light.
