Using this headlight adapter is super easy. First, find the multi - pin connector on the back of your Ford OEM HID headlight. Then, simply plug the outputs of the harness directly into it. That's all for the installation, no need to cut or splice any wires. When using the adapter, make sure the connections are tight to avoid any flickering or malfunction. As for maintenance, keep the adapter dry and clean. If you notice any signs of wear or damage, check the connections first. If the problem persists, you can contact our support team as the product comes with a 2 - year warranty.