where is the fuel pump relay? - Harley Davidson Forums Aug 13, 2012The system relay does control the fuel pump/injectors. It would be worth it just to pull the cables and check the prongs on the relay to make sure they are clean and dry with no corrosion.Fuel Pump problems?Dec 14, 2014Fuel Pump Not PrimingMar 03, 2010anyone have trouble with system relay?Jul 31, 2009See more results harley fuel pump relay | eBay www›Search›harley fuel pump relaySave harley fuel pump relay to get e-mail alerts and updates on your eBay Feed. + Items in search results. See search results that fit your vehicle. DS Starter/Brake Light/Fuel Pump Relay Switch Harley Davidson #139488. 100% Satisfaction - Worldwide Shipping - Huge Selection. Brand New · Drag Specialties. $13.