ECM wiring harness questions | Harley Davidson Forums Apr 17, 2013If I were to remove abs, radio, tach, oil pres, clock and batt gauge's out from a 2008 SG harness use a 2008-12 103ci RK ECM. Would the ECM run the bike without putting the bike in safe mode? Or installing a Zippers Thundermax #309-362 ThunderMax® with AutoTune for 2008 Throttle-By-Wire for Touring. Motorcycle Wiring Harness | Harley-Davidson USA Shop Motorcycle Wiring Harness' at the offical Harley-Davidson Online Store. Free Shipping to your local H-D dealership on all orders! FREE SHIPPING WITH $50 PURCHASE AND FREE RETURNS - LEARN MORE. Free Shipping with $50 purchase.