Daytime running lights (DRLs) are designed to make your vehicle more visible to other drivers during the daytime. Most DRLs are integrated into the headlight assembly, so they turn on and off with the headlights. Some vehicles have a separate DRL module that is controlled by the body control module (BCM).
To turn off your DRLs, you will need to find the DRL fuse in the fuse box. On most vehicles, this fuse is located in the instrument panel fuse box. Once you have found the fuse, simply remove it to disable the DRLs.