What Causes Car Doors to Fail to Lock After Rain?

[McEmilio]

If car doors fail to lock after rain, you should first check whether the locking mechanism has a locking action. If not, it may be due to poor contact in the central control system wiring. Conversely, if the locking mechanism has a locking action but the door still doesn't lock, it usually indicates excessive resistance in the locking mechanism, often caused by rust. Another possible reason is misalignment of the motorized lock hole position in the door lock, preventing the door from closing properly, or a malfunction in the door lock motor resulting in insufficient pulling force to close the door. Solutions for Car Doors Failing to Lock: First, check whether all four doors, the trunk, and the front hood are properly closed. Additionally, inspect each lock mechanism and control circuit for potential short circuits. Common causes for doors failing to lock include issues with the door lock mechanism, the locking actuator, or wiring faults. It is recommended to visit a repair shop for inspection, as this issue can be complicated—requiring door panel removal and significant effort—so DIY repairs are not advised. Determine whether the central control motor is malfunctioning or if the door simply won't close. If the door won't close, the issue likely lies with the lock mechanism. If the door closes but the motor doesn't work, the central control motor may be damaged.