Circuits of the automobile are protected with the help of fuses, circuit breakers, as well as fusible links and the main fuse/relay box is positioned in the engine compartment while the interior fuse/relay position is on the driver side of the instrument panel. Small, medium and large fuses of the same blade terminal are employed in the fuse blocks; once it is necessary to remove the fuses, the small fuses can turn to the pliers as well as the plastic fuse puller while the medium and large ones can be removed by hand. For an electrical component failure, always ensure that you check the fuse, applying the use of a test light on the terminal tips to ensure there is power, and a fuse can also be observed for its burned element. Blown fuses should be replaced by the correct type as physically, fuses may be interchangeable but should have the rated current to protect respective circuits. If a replaced fuse poses to fail at once, then the real problem, which may be a short circuit from spoilt wires must be dealt with. Also, some of the circuits are protected by fusible links that are applied in circuits of high current and are actually made of a material that melts when too much current passes through it; when replacing a given fusible link that has blown, then the right one must be placed in its place and if a new one burns then the circuit must be checked.