What is a drl relay?

A DRL relay, or Daytime Running Light relay, is an electrical component used in vehicles to control the operation of daytime running lights. These lights are designed to enhance visibility during daylight hours, increasing safety on the road. The relay activates the DRL circuit when the vehicle is in operation, allowing the lights to turn on automatically without requiring the driver to manually switch them on. If the relay fails, it can result in the daytime running lights not functioning properly.