When installing this product, if it fails to work properly, please remove the ambient light, take the car battery to charge it, and reconnect the mobile phone to test;

If the ambient light returns to normal operation, it is judged to be caused by an installation error, please re-test the installation;

On the contrary, if the light still cannot work normally after being connected to electricity, it is judged that the product is faulty, and you can apply for after-sales service;

All products are not guaranteed after thread cutting, please ensure that the product is complete.