Because there are many electronic devices in the cab, once the water enters, it is very easy to short circuit and it is very difficult to maintain. Even after the maintenance, the circuit may be short-circuited from time to time, which will have great security risks.
Water leakage under the steering wheel may be caused by condensed water generated by air conditioning, failure of water tank cooling system, damage or blockage of heating water pipe, or in a car with a skylight, the skylight drain hole is blocked, and rainwater will seep into the car if it cannot be discharged.