What is an Automotive Fuse? An automotive fuse is an electrical component that is designed to protect other components, devices, and wiring from any damage that might occur due to excess current flow. If the replacement fuse blows shortly after installation, your car's electrical system may have a more serious issue. Consult an mechanic.Fuses age like any other car part. Over time, they will fail. It doesn’t mean your car has a major problem.If you need to drive the car, such as to pick up a new fuse, replace the broken fuse with a fuse from a nonessential system, such as the radio. Make sure both fuses have identical ampere ratings.Keep a few fuses stored in your car so you can make a quick repair when necessary. How to Test and Replace a Car Fuse: You could remove and install fuses with puller. Remove the fuse and hold it up to the light. The small filament should be continuous from one side to the other. If the filament is melted, it means that something overheated the circuit. If in doubt, use a multi-meter to check for continuity across the two terminals. If the fuse has burned out, simply insert a new fuse of the proper amperage rating in the slot. Package 10*3A 10*5A 10*7.5A 10*10A 10*15A 10*20A 10*25A 10*30A 10*35A 10*40A