have you checked your license plate lights? Also, middle ones are considered parking/city lights. Start with easy problems, then work your way through the more difficult ones. After that, i'd say unplug the reps, plug in your original headlamps (don't disassemble just, plug in the harness) and see if the error still occurs. If it doesn't, something's up with the rep's. Alternate plugging one in, then the other to determine which lamp is not functioning correctly