What is the function of the Volkswagen Lavida 126 relay?

[VonLyla]

When the starter motor operates, it requires a large current. The key is used to control the starter motor. If the key is connected and a large current flows from the key to the starter, the key must be made large and bulky to withstand frequent high current without burning out. Additionally, thick wires would be needed to connect the battery, key, and starter motor, which is not cost-effective, unreliable, and inconvenient for maintenance. Here is additional information: Automotive relay: When the key is turned off, the pull-in coil inside the starter relay loses power, the magnetic force disappears, and the starter circuit contacts open under the action of a spring, cutting off the current to the starter motor, which then stops working. The starter relay is built to be robust, allowing frequent high current passage, thereby improving circuit reliability. Consistent with the general function of relays, relays in the electrical automation industry act as "switches," serving as the intermediate link that controls the opening and closing of one circuit to control the next. Automotive relays typically use electromagnetic or solid-state designs.

[StAdelyn]

I'm an experienced driver with over a decade of experience driving Volkswagen cars. The main function of the Volkswagen Lavida's 126 relay is to act as an electronic switch, controlling the operation of high-current devices such as headlights or fans. Taking the headlights as an example, when you press the switch while driving, a small portion of the current passes through the switch, and the relay senses this to trigger the actual on/off of the headlights. This 126 relay is commonly found in the Lavida's fuse box, preventing small-current switches from directly handling high currents and thus avoiding circuit damage. If the relay malfunctions, the car lights may not turn on or may flicker, which is very dangerous when driving at night. I once encountered this issue when the relay rusted in the rain, causing the lights to go out and nearly leading to an accident. The solution is to regularly check the fuse box, test the resistance with a multimeter yourself, or keep a spare relay on hand—they're very cheap, costing just around twenty yuan. In the Lavida, the 126 relay is also related to the air conditioning system, ensuring proper airflow—it’s unbearable in summer without AC. In short, it’s a little guardian that keeps the electrical circuits safe.

[Leonard]

I enjoy DIY car repairs, and the Volkswagen Lavida 126 relay is a handy component for controlling switches. For example, it manages the current flow for the fan or headlights. The operation is simple: open the fuse box, locate relay 126, and replace it. If it fails, functions like lights or the fan won’t work. When replacing it yourself, just unplug the old one and plug in the new one—saving both money and hassle. The price is low, with options online costing just over ten bucks. It’s located in the box on the left side of the driver’s compartment, a convenient design in the Lavida. Common issues include oxidized contacts or damaged coils, causing the device to stop responding. Regularly listen for the relay’s clicking sound—no sound means trouble. My tip: clean the contacts every six months to prevent rust and dust. Repair manuals include diagrams, making it easy for beginners to learn and avoid expensive shop fees. Safety reminder: disconnect the power to prevent short circuits and damage.

[AlinaLynn]

As an ordinary car owner, the Volkswagen Lavida 126 relay functions to assist in switching current for electronic control devices. Simply put, it acts like a middleman, enabling devices such as lights and fans to activate via electrical signals. Working principle: a small current passes through the relay coil, triggering the switch closure mechanism to power the device. In the Lavida, the No. 126 relay controls specific systems like lighting. Its benefit is protecting the main switch from burnout, thereby extending its lifespan. If faulty, the device may become unresponsive or behave abnormally. The inspection location is the car's fuse box labeled 126. It is low-cost and easy to replace. If it affects safety while driving, such as lights going out, pull over and check. Maintenance is straightforward and doesn't require professional tools.