Faulty Headlight Relay Signs Symptoms of a Faulty Headlight Relay - Fiches Auto 24 Is your car experiencing headlight problems? It could be a faulty headlight relay. In this video, we'll show you the common symptoms of a bad headlight relay and how to diagnose the problem. We'll also provide tips on how to replace the relay yourself. Here are some of the symptoms of a faulty headlight relay: Headlights not working at all: This is the most obvious symptom of a bad relay. If your headlights don't come on at all, the relay is likely the culprit. Headlights flickering or dimming: If your headlights are flickering or dimming, it could be a sign that the relay is failing. Headlights only working on one side: If your headlights are only working on one side, it could be a sign that the relay for that side is bad. Headlights staying on after the car is turned off: If your headlights stay on after you turn off the car, it could be a sign that the relay is stuck in the on position. If you're experiencing any of these symptoms, it's important to diagnose the problem as soon as possible. A faulty headlight relay can be a safety hazard, as it can make it difficult to see at night. In this video, we'll show you how to diagnose a faulty headlight relay and how to replace it yourself. We'll also provide some tips on how to prevent your headlight relays from failing in the future. Don't forget to subscribe to our channel for more car repair and maintenance tips! #headlightrelay #headlightproblems #carrepair #maintenance