With the Harley you hold the trip milage reset button down and the turn the key on and bouth tack and speedo points go to 100% then back to 0. Then the milage indicator is in the dianostic mod., let the trip out and back in(fast) and it will show you error code. And then go to googel or one the those kind of sight and type the code in and it will take you the problem (as per the Harley eng.).Rudy
