The first step for changing the side marker lamp is to isolate the battery's negative cable. After that, twist the side marker bulb socket on the underside of the
Fender one-third turn to the left and pull it out of the side marker lamp body. Pull the bulb directly at an angle away from its base to remove it from the socket. Insert your replacement bulb into the socket and fit the new bulb with the socket back into the side marker lamp housing. After that, reconnect the end of the negative cable back to the battery.