Introduction Now that you've switched to LED headlights, which are brighter and more efficient, one of them has gone dark, or perhaps it's flickering randomly. It's an annoying and possibly dangerous situation. Know that the problem can sometimes be easier than you might think before assuming the lightbulb is dead or going to the mechanic. The most common causes of LED headlight not working will be covered in this guide, along with simple, step-by-step instructions for restoring your lights' brightness. Why Are My LED Headlights Not Working? Common Causes LED headlights are advanced electronic components as instead of traditional halogen bulbs. Their failure is typically caused by one of the following specific factors and is rarely random: Compatibility & CanBus Errors: Modern vehicles use a complex computer network called a CanBus (Controller Area Network). It monitors all electrical circuits, including your headlights. Standard halogen bulbs have a specific resistance that the car's system expects. LED bulbs draw significantly less power. The car's computer interprets this low power draw as a