This adapter is designed to prevent electrical accessories from interfering with the electrical system on late model BMW, Ducati, and other European motorcycles with a Can-BUS electrical system and a "City Light" 194 marker bulb in the headlight.

 

It includes a diode for built-in reverse polarity protection. This item is designed solely to provide a "hot" trigger wire to activate a relay to power other accessories, such as driving lights, accessory fuse blocks, GPS, or other 12-volt electrical devices when the motorcycle is turned on without upsetting the motorcycle's sensitive CAN-BUS system. This adaptor is also removable without leaving holes in the insulation of the original wiring harness, so it keeps your warranty in place even at the strictest dealers.