Various combinations of fuses, circuit breakers and fuse links are used to protect the contact circuits of the vehicle's electrical equipment. Two mounting blocks are located under the dashboard of the car, one is on the right side of the engine compartment, next to the battery.
Each individual fuse is used to protect a specific electrical circuit or several circuits at once. The identification card for the placement of fuses in the mounting block is usually glued to the cover of the latter, from its inside.
The mounting blocks use fuses of a compact design, equipped with bayonet contacts, and, if necessary, easily removed by fingers from their sockets in the block. In case of failure of any of the consumers of electricity, first of all, you should always check the condition of the corresponding fuse. Turn the key in the ignition switch to the ON position and, using a test lamp, probe the open terminals of each of the fuses. If the lamp lights up when connected to each of the terminals, then the fuse is good. If there is voltage only on the power supply side, then the fuse is blown. We also note that usually the fuse case is made of transparent plastic, through which it is easy to determine the state of the working jumper.
When replacing a blown fuse, make sure that the prepared replacement fuse matches the type of the failed fuse. Fuses designed for different rated currents may not physically differ from each other in any way, while not being interchangeable. Each of the electrical circuits has different operating parameters and needs a different degree of protection, therefore, replacing a fuse designed for a certain current strength with one that does not correspond to it in terms of parameters is fraught with the most serious consequences (until the fire). Fuse operating parameters (rated current) usually marked on its plastic case.
If the new fuse also fails immediately after installation, it makes no sense to replace it further - first, the cause of the overload in the circuit should be identified and eliminated. In most cases, this is a short circuit of the connecting wiring, caused by damage to its insulation.
All models of vehicles discussed in this manual have a main fuse, usually rated at 80 A or 100 A. The fuse provides general protection for all circuits connected to the battery and is knocked out when any of them are overloaded, thereby preventing failure the main braid of the electrical wiring. The main fuse consists of a plate-like metal bridge that melts easily when electrical overloads occur. Always disconnect the battery before replacing the main fuse. A replacement main fuse can always be purchased from the original service center of the vehicle manufacturer.
Attention! If the stereo system installed in the car is equipped with a security code, before disconnecting the battery, make sure that you have the correct combination to activate the audio system! The main fuse is located in the mounting block located in the engine compartment of the car, outwardly it does not differ much from other fuses and changes in a similar way. Remember that a failed main fuse must be replaced with a replaceable one designed for the same amperage.