Descriptions:             The insufficient brightness of the headlight is mainly resulted from the obsolescence of the circuit that leads to power loss. The character of our product is to install a Booster into the original circuit; it will make the voltage recover to the standard state and keep the light with stable brightness.                 Installation:             1. Taking the right/ left original couplers apart. 2. Confirming following items of the Headlight (1) The power source of the Light switch is Common Positive or Negative. (2) What type the couplers are, for example H1, H4, H7, 9004, 9005, 9006¡K. 3. Plugging both connectors (F & M) of the Booster into the original couplers as the illustration. 4. Fixing the Booster and keeping it away from the heat. ex. Radiator 5. Turning on the headlight and switching High/ Low beam for test.             [ Circuit Diagram]