Car Led Daytime Running Lights Controller Drl Auto Dimmer Relay On/off Switch (daytime Running Light Controller). f74 Excellent DRL controller with auto start delay and light dim function. No trouble finding ACC in fuse box or annoying bypass process and works with most running lights LED daytime running lights in the market. When the engine is started, the daytime running lights will turn on automatically. When the engine is off, the daytime running lights will turn off with a 15 second delay. Compatible with most LED DRL kits. Suitable for all vehicle models. Easy installation. Connect your new LED daytime running lights (red to red, black to black) to the output cable. Then the input cable, the red cable to the positive pole, the black to the negative pole of your battery.