How to Troubleshoot a Daytime Running Lights Problem | It How to Troubleshoot a Daytime Running Lights Problem On the underside of the fuse box cover on Ford and Chevrolet vehicles there is a diagram depicting where each fuse is located within the fuse box. Locate the "DRL" or "Daytime Running Lamp" fuse. If you are unsure of the fuse location, consult your vehicle's owner's manual. What is the DRL in the fuse box? - Quora Sep 16, 2015DRL stands for "daytime running lights." They're the white lights on the front of newer cars that turn on in the daytime, when your headlights are off, to make your car more visible to other drivers. The DRL fuse is the fuse for the daytime runnin..