Circuit protection is through fuses and fusible links supplemented by circuit breakers, which is located beneath the left end of the dashboard. Two types of fuses are utilized based on the date of manufacture: first version of the fuses come in a glass tube design that enables users to check the inside metal component, later models come in miniature fuses with blade terminal that can be removed or refitted with fingertips. When an electrical component is not working, the first process is checking the fuse since one that has blown has its element between the terminals melted and is therefore different from a working fuse. To test the fuses the ignition key should be switched on and a test light can be used by connecting one end of the test light to the earth and the other end to the exposed terminal end of the fuses; the test light should turn on if the fuses are okay. Circuit protection requires the use of correct type and accurate amp rating and that is why one should not replace a blown fuse with a higher or even a lower value. The amperage value is normally printed on the body of the fuse, and the different colours are used to mean different types of amperages. Caution is necessary: before a fuse can be replaced all electrical components and the ignition switch must be turned off and it is fatal to replace a fuse with metal or foil since one risks a fire outbreak or severe blows to the electrical system. If a replacement fuse fails shortly after it has been replaced, it's advisable not to replace it again until one is sure that the problem that caused the quick failure-for instance a short circuit-had been addressed.