The daytime running lamp module automatically turns on your daytime running lights (DRLs). These lights are less intense than your headlights and make it easier for others to see you in the snow, rain, fog, and other inclement weather conditions. These lights were developed in the 80s, and come standard on many vehicles today. The DRLs are a safety feature, but are not required on all vehicles in the United States.
The daytime running lamp module receives a signal from the ignition when your vehicle is started. Once the module receives this signal, your DRLs turn on. It is important to note that they do not impact the other lighting features in your vehicle and they are amber in color. If you do not already have a module in your vehicle, the professionals at YourMechanic can install one for you. In addition, aftermarket daytime running lamp modules are available as well that can be installed by YourMechanic. Once these are installed, they will provide you with years of illumination.
Over time, the DRLs module can short circuit or have electrical problems. In addition, the wiring could corrode causing a variety of issues within the light housing as well. If your vehicle does have daytime running lights, you are required to have them on while your vehicle is running, so it is important that your DRL module is working correctly. If your headlights and other lights are working correctly, that doesn’t mean your DRL module is fine. In fact, you can have a problem with your DRL module and all your other lights in your vehicles could be working like normal.
Since the module can go bad over time or have wiring issues, you should be aware of the symptoms this part gives off that indicates it is time to have your module looked at.
Signs your daytime running lamp module needs to be replaced includes:
- Running lights stay on constantly, even after your vehicle is turned off
- Running lights do not turn on at all, even if your vehicle is on
If you are experiencing any of the above symptoms, book a service with a mechanic so that he or she can replace your car's running lamp module. If you do have DRLs, it is important to have them running at all times as a safety feature.
This article originally appeared on YourMechanic.com as How Long Does a Daytime Running Lamp Module Last? and was authored by Valerie Johnston.