All the electrical circuits in the vehicle are protected by fuses, circuit breakers and fusible links, the main fuse/relay panel is in the engine compartment, while the second one is in the passenger compartment. Every fuse serves a particular circuit that is marked on the lid of the fuse panel, and the interior circuits have their fuses in the boxes which can be accessed by opening the correct door and then lifting off the lid of the fuse box panel. In the fuse blocks, fuses of different sizes-small, medium, and large-are installed, and all of them have the same blade terminal configuration; whereas medium and large fuses can be pulled out manually, small fuses have to be extracted using pliers or a small plastic fuse-puller. When an electrical component is not working as it should, the first thing to consider is the fuse, using the test light to see power at the ends of exposed terminals; if there is power at one end of the fuse and not at the other, then the fuse is blown and this can also be seen by the melted element between the terminal tips of the fuse. They should be replaced with correct type because, although physically similar, only the correct rating should be pressed into functioning as sufficient protector for every electrical circuit, having the amperage rating molded in the top of the fuse's body. In these models, the large high amperage fuses are used instead of fusible links and they are placed in the underhood fuse/relay box.