Using this Cummins X3B30 LED brake light is easy. First, make sure your vehicle is one of the compatible models (2009 - 2018 Dodge Ram, excluding 2009 - 2010 HD trucks, and 2019 - 2023 RAM HD). Then, use the plug - and - play harness to connect the light to your truck. When it comes to maintenance, keep the lens clean to ensure maximum brightness. Wipe it with a soft, dry cloth regularly. Since it's designed for US - Spec vehicles, if you're in another country, check the compatibility before installation. If you have any issues, refer to the manufacturer's instructions or contact customer support.