An illuminated accessory device and method for mounting the same on a surface of a motorized vessel. A fastener or post is integral with or connected to a mounting surface of the accessory device having an opening therein, wherein the fastener or post has a channel extending along a length thereof and wherein the channel is aligned with an enclosed channel of the accessory device terminating at one end at the mounting surface opening. A wire harness extends within the accessory device enclosed channel and through the fastener or post channel, wherein the wire harness is electrically connected at a first end to a light source disposed within or secured to the accessory device and has a terminal end extending beyond a distal end of the fastener or post. The method comprises connecting the terminal end of the wire harness to an electrical power source of the motorized vessel, and engaging the fastener or post with an opening in an installation surface of the motorized vessel.