What Causes the Hazard Lights to Work Normally While the Turn Signals Don't Light Up?
3 Answers
When the hazard lights function normally but the turn signals don't light up, it is usually due to a fuse failure or a burnt-out bulb. Below are specific methods for using hazard lights: 1. When driving in foggy conditions with poor visibility, you should turn on the hazard lights along with the fog lights to alert passing vehicles. 2. In the event of a vehicle breakdown or traffic accident on the road, hazard lights should be activated to warn other vehicles for safety. On highways, failure to use lights and set up warning signs as required after a vehicle breakdown or accident parking will result in a 12-point penalty. 3. When towing a malfunctioning vehicle, both the towing vehicle and the towed vehicle should turn on the hazard warning lights to indicate they are in an abnormal state. 4. When making a temporary stop on the driving lane, turn on the hazard lights to alert other vehicles.
My car had this issue too—the hazard lights work fine but the turn signals don't light up at all. I suspect the turn signal switch is faulty, since the hazard lights are controlled directly by a separate switch, while the turn signals require activation via the turn stalk. Sometimes the switch contacts wear out or get corroded, preventing the signal from being sent. Another common culprit is a blown turn signal-specific fuse—try locating and replacing it in the fuse box. If the turn signal fuse is intact, the relay might be failing; a faulty turn signal relay with poor contact often makes a buzzing sound, indicating it's bad. Check the bulbs? Since the hazard lights work, the bulbs are fine—no need to inspect them. Lastly, loose wiring or a faulty control module could also cause this. I recommend visiting a repair shop ASAP to avoid accidents when turning—safety first, don't delay!
From daily experience, if the hazard lights are working normally, it proves that the related bulbs are still functioning. However, if the turn signals are not working, the issue is mostly in the control part. It could be a fault in the turn signal switch itself, such as aged or broken internal contacts, causing no response when operating the gear lever. Another possibility is a damaged relay; the turn signal relay is different from the hazard light relay and often burns out due to overheating. The fuse is also a key point—there is a dedicated fuse for the turn signal power supply in the car, so check if it's blown and replace it with a new one. If there's loose wiring, the turn signal cable connectors may be corroded or disconnected, requiring tightening. Don't ignore this issue—driving without turn signals is extremely dangerous, especially when changing lanes, as it can easily lead to rear-end collisions. Addressing it promptly can save you a lot of trouble.
