What is the problem when the car's turn signal flashes too fast?
2 Answers
Introduction to the reasons why the turn signal flashes too fast: 1. Burned-out turn signal: Generally, turn signals such as the turn signal, front fender light, cornering auxiliary light, rear turn signal, etc., any burned-out bulb may cause the flashing frequency to be too fast when turning. 2. Poor contact of the turn signal: Such as loose bulbs, poor plug connections, etc. 3. Inconsistent power or model of the turn signal bulb: For example, some car owners do not use bulbs of the same specification when replacing turn signal bulbs, or the power is too large or too small. 4. Faulty bulb control relay: The relay controlling the turn signal system circuit may cause this. 5. A few cases may involve a faulty combination switch or instrument panel: Although rare, due to the different circuit designs of different car models, the possibility of the fault mentioned in the question cannot be ruled out. 6. Faulty lighting circuit: Multiple reasons such as poor line connections, poor grounding, incorrect bulb installation, rust, etc.
After driving for so many years, I've encountered quite a few instances where the turn signal flashes rapidly. The most common cause is when a bulb on one side burns out. I experienced this with my old Volkswagen—the left turn signal was flashing like a racing heartbeat, and sure enough, the rear light was out when I checked. Replacing the bulb immediately fixed it. Another possibility is poor contact even if the bulb isn't broken, so you should check for rust or looseness in the socket. If everything seems fine, the issue might be with the flasher relay. This component is located under the steering wheel and controls the blinking frequency. I’ve replaced it twice myself—just remove the side panel of the dashboard, and it's a job most people can handle.
