Driving Lights

What would cause running lights to not work?

If only one daytime running light is not working, it most likely has a burnt out bulb or a bad switch. Remove the socket from the light and see if the bulb is dark or if the filament is burned out, which means it needs to be replaced. ... Check the contact point of the bulb for melting.

https://blog.1aauto.com/daytime-running-lights-not-working-how-to-diagnose-and-fix-them/

Why do my brake lights work but not my running lights?

The most common reason why your tail lights are not working but brake lights are is due to a bad or wrong type of light bulb installed. It can also be caused by a blown fuse, bad wirings, or corroded sockets or plugs. A faulty control light switch could also be to blame.

Is there a fuse for running lights?

Remove the cover from the fuse box located in the engine compartment. ... Locate the "DRL" or "Daytime Running Lamp" fuse. If you are unsure of the fuse location, consult your vehicle's owner's manual. Remove the "DRL" fuse from the fuse box and replace it with a new fuse.

https://statestreetautorepair.com/blog/common-reasons-your-headlights-stop-working