If the daytime running lights (DRL) indicator bulb is illuminated, it means that there is a problem with your vehicle's DRL system. This could be a simple issue such as a light bulb burning out or it might involve something more serious, such as a problem with the wiring or even a blown fuse. It is important to have these problems fixed as soon as possible in order to prevent them from affecting other parts of your car's safety systems.
The DRL on a car is a feature that makes it more visible to other road users in low-light conditions. It can be set up in one of two ways: either the headlights are activated at a reduced intensity, or the DRL is a separate lighting system that operates at full intensity. The primary purpose of the DRL is to make your car more visible, which can help you avoid collisions with other vehicles or pedestrians.
The DRL can be installed on most cars and is a popular accessory amongst drivers. However, it is important to note that it must be installed in accordance with vehicle type approval laws and should not interfere with the operation of other safety features such as hazard lights or the high-beam function. There are many do-it-yourself DRL kits available online and at some brick-and-mortar stores, but it is advisable to consult the owner's manual for your specific car before proceeding with any DIY installation.