Fuses, circuit breakers, and fusible links protect the electrical circuits of the vehicle; the main fuse/relay panel is situated in the engine compartment on the driver's side near the battery, whereas the second interior fuse/relay panel is inside the passenger compartment on the driver's side of the dash. All the fuses screwed or plugged into the blocks or inlets have the same type of blade termination, and the medium and large fuses can be pulled out manually while the small fuses need to be removed by pliers or a plastic fuse puller for their removal. Before deciding during electrical malfunction that a part has stopped receiving power and may be defective, it is necessary to check the fuse first and examining a blown fuse using a test light to conduct a rudimentary check of power at the exposed terminal ends of it as well as checking to see if the element has melted. When replacing a blown fuse, it is recommendable to use the appropriate fuse and avoid fuses of the same physical size for they may possess different ratings; each circuit branch needs its protector and the numerical value of amperes is indicated on the fuses' body. However, if a replaced fuse keeps tripping, the main problem, common as a short circuit as a result of battered wires, should be resolved. Some circuits may be protected by fusible links especially if they're not generally fused or if they're high current like the one between the alternator and the starter motor; these links can be changed with another link which is hopefully of the same rating as the one that was used previously and one will require to debug the car if again the link blows. Individual circuit breakers cover items such as power windows or the heating function for the seats, and may operate in such a way that they will overload momentarily and shut down, requiring a look if it has not reset; a fault in the system will experience a shut down for a short time before having to be looked at if the problem has not gone away. A basic check entails partially withdrawing the circuit breaker from its connection to use the voltmeter, where at both ends, the battery voltage is supposed to be confirmed; however, if voltage is only confirmed at one end, then the circuit breaker requires replacement and some breaker types are manually reset.
