How to Tell if a Car Fuse is Blown?
In electronics, fuses serve as safety mechanisms to prevent the overflow of current which can damage an electrical circuit. A fuse is typically a metal wire strip that melts or burns when too strong a current passes through it, thus interrupting the flow of electricity and breaking the circuit to a given device. A car has many such fuses to protect its various electrical components from high voltage occurrences. These fuses are generally rated at 32 volts and are in one of two fuse boxes for most vehicles.
When a component in a vehicle stops working, the reason is most often a blown fuse due to an overabundance of electrical current. This could apply to everyday driver-interfaced devices like a car stereo or interior lighting but can also include more sophisticated systems powered by electricity: powertrain electronics, chassis electronics, safety features, driver assistance technologies, and passenger comfort amenities. When a failure occurs, the bad fuse needs to be located and replaced. Replacement fuses can be found online and at virtually any store with an automotive department.