Why do the lights turn on when the car is submerged?

[LeKarter]

There may be water ingress in some plugs, causing electrical connections in the car. Below is relevant information about a submerged car: 1. Water level above the exhaust pipe: If the water only covers the exhaust pipe, promptly move the car away. Water in the exhaust pipe will not be sucked back into the engine, and engine stalling is primarily due to water entering the engine's intake system, unrelated to the exhaust pipe being submerged. 2. Water level at half-wheel height: If the water reaches half-wheel height, the car generally won't leak. However, if submerged for a prolonged period with aging seals, leaks may occur. In such cases, drive the car to a 4S shop, remove the interior, clean, and dry it. 3. Water level above half-wheel height: If the water exceeds half-wheel height, the engine may take in water, and the interior may leak. Do not start the engine to avoid damage to the engine or electronic components. Note that insurance will not cover damages caused by ignition in a submerged car.