What is the reason why the Jetta small light cannot be turned off?

[VonLeah]

If the Jetta small light cannot be turned off, first check whether the car small light switch has returned to its position. If the light remains on after the switch returns, it may be a circuit problem, and it needs to be sent to a professional store for inspection and repair. Introduction to the Jetta brand: Jetta is a car brand under FAW-Volkswagen Automobile Co., Ltd., a joint venture of German Volkswagen Group in China. Its first product, Jetta (Jetta-MK1), was launched in Europe in 1979. In terms of structure, Jetta (including the later Vento/Bora) is a Golf with a rear trunk. Jetta can be regarded as a derivative of Golf. The current models on sale include the new Jetta, VA3, VS5, and VS7. How to use the Jetta driving light switch: The first gear is the small light, the second is the headlight, and the high and low beams are switched by pushing up and down while keeping the headlight gear.

[Gerald]

Recently, I've seen many people on forums asking about Jetta's parking lights not turning off, which is actually quite common. The issue lies in the electrical system, usually caused by the parking light switch itself being stuck or damaged, preventing it from turning off. Relay failure can also cause contact adhesion, allowing current to keep flowing. Short circuits in the wiring are another common cause, such as poor contact due to aging wires, which can keep the parking lights on constantly. Another possibility is a malfunction in the body control module, which controls the lighting circuit—if there's a programming error or hardware failure, it can lose control. Additionally, abnormal fuse blowing can sometimes affect the switch signal transmission. Don't overlook battery protection; keeping the parking lights on will drain the battery, and prolonged use may even pose an overheating risk. It's recommended to promptly inspect these areas and seek professional repair services for diagnosis and repair to avoid compromising safety and vehicle lifespan.

[OIsabella]

Having driven a Jetta for many years, I've encountered similar issues, and the solution can start with the basics. First, check the fuse box—open it and look for the fuse related to the small lights to see if it's blown or has poor contact. If the fuse is fine, then test the small light switch to see if it operates smoothly or shows signs of sticking or malfunction. You can inspect the relay in the engine compartment or under the dashboard by unplugging and replugging it to check for sticking. For wiring issues like short circuits, carefully look for signs of wear or burn marks. Battery voltage is also crucial, as constantly lit lights can drain it. If simple troubleshooting at home doesn't resolve the issue, visit a 4S shop for circuit testing with professional tools—it won't take much time or money. Remember to ask the technician to inspect the lighting system during regular maintenance to prevent major problems.

[John]

I found that the Jetta's parking lights won't turn off, which is absolutely not something to be taken lightly. This issue can severely drain the battery and even pose a fire hazard. The main causes are a faulty parking light switch, stuck relay contacts, or a short circuit in the wiring, which keeps the current flowing and the lights on. In modern cars, a malfunctioning body control module is more common, as it can erroneously send signals to keep the parking lights on. If you try to turn the lights off yourself and they still won't go out, don't delay—stop using the vehicle immediately and have it checked to avoid abnormal brightness interfering with other drivers at night or draining the battery, making it difficult to start. Consulting a repair expert can quickly pinpoint the problem, as ensuring driving safety is the top priority. Remember to add a reminder: addressing similar issues early saves both hassle and money.