Why do the car lights turn on when the vehicle is submerged in water?
2 Answers
This situation may occur due to damage to the electronic systems around the engine. If this happens, you should immediately go to a 4S shop to have a professional technician read the fault codes. Below are some relevant details: 1. Main Advantages: The instrument panels of different cars vary. However, conventional car instruments generally include a speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, and charging gauge, among others. 2. Headlight Structure Principle: In terms of the overall structure of headlights, whether they are ordinary halogen headlights, xenon headlights, or LED headlight assemblies, there is a vent rubber tube located at the rear cover position.
I remember that time when I helped a friend deal with a water-damaged car, and surprisingly, the headlights were still on. It was really strange. The main reason was due to water conducting electricity: the electronic systems in the car, such as the wiring for the bulbs, which should have been insulated, got flooded, and the water bridged the gaps between the wires, creating a short circuit that allowed the current to flow directly and light up the headlights. Common issues also include the battery still outputting energy or relays being corroded and mistakenly activated, causing continuous power supply. This is not a good thing—once the electrical system shorts, the entire car could potentially catch fire, especially since the headlights being on indicates a high risk of internal short circuits, so don’t ignore it. I recommend immediately turning off the ignition key, not attempting to start the car, and towing it to a repair shop for inspection right away. Water-damaged cars are prone to rust in their electronic components, and long-term hidden hazards can be even worse. Regular maintenance and waterproofing precautions are essential for prevention.
