Harley Davidson Sportster Fuse Box Information | Hdforums Harley Davidson Sportster: Fuse Box Information. The fuse box contains the protection your Sportster's electrical system needs to prevent shorts from becoming fires. Fuses purposely serve as the weak link in the circuit, but sometime just blow randomly. Always start at the fuse box when your Sportster experiences an electrical problem. Motorcycle Fuses & Fuse Boxes for Harley-Davidson Get the best deal for Motorcycle Fuses & Fuse Boxes for Harley-Davidson Sportster 883 from the largest online selection at eBay. Browse your favorite brands affordable prices free shipping on many items.