What's the reason for daytime running light malfunction?
1 Answers
Daytime running light malfunction may be caused by the following reasons: 1. The fuse of the daytime running light is blown: If the fuse is blown, usually both sides won't light up. If only one side isn't working, it's probably not a fuse issue. 3. Wiring harness failure: Check the wiring harness between the headlight control module and the daytime running light. 4. Halo light driver malfunction: It could be due to loose or poor connection of the driver plug. 5. Daytime running light bulb problem: If there's an issue with the filament quality of the bulb, its resistance will increase as the temperature rises, causing the operating current to decrease and consequently making the daytime running light turn off.