Faulty wiring or defective wiper motors can cause excessive current flow, resulting in a blown fuse. The inside of a blown fuse will usually be black or the metal filament might be broken. This 485pcs ATO & ATM Style Blade Fuse Set includes standard type fuses and mini type fuses of 11 ratings commonly found in most modern cars and trucks, with see-through cover for quick detection of blown fuses. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications. The set comes organized in a PVC storage case.