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 vehicle's instrument panel, one on the right side of the engine compartment, next to the battery.
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Each individual fuse is used to protect a specific electrical circuit or several circuits at once. The identification card of the location of the fuses in the mounting block is usually glued to the cover of the latter, on its inner side.
Fuses of compact design, equipped with bayonet contacts, are used in the mounting blocks and, if necessary, can be easily removed with fingers from their sockets in the block. If any of the power consumers fails, the condition of the corresponding fuse should always be checked first. Turn the key in the ignition switch to the ON position and use a test lamp to 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 OK. If voltage is present only on the power supply side, then the fuse has blown. Note also that the fuse body is usually made of transparent plastic, through which it is easy to determine the condition of the working jumper.
When replacing a blown fuse, make sure that the replacement fuse you prepare matches the type of the one that failed. Fuses rated for different nominal current may physically be no different from each other, but are not interchangeable. Each electrical circuit has different operating parameters and requires different levels of protection, so replacing a fuse rated for a certain current with one that does not match its parameters is fraught with the most serious consequences (including a fire). The operating parameters of the fuse (nominal current) are usually indicated on its plastic casing.
If the new fuse also fails immediately after installation, there is no point in replacing it further - first you need to identify and eliminate the cause of the overload in the circuit. In most cases, this is a short circuit in the connecting wiring caused by damage to its insulation.
All models of cars considered in this Manual are equipped with a main fuse, usually rated for 80 A or 100 A. The fuse provides general protection for all circuits connected to the battery and trips when any of them is overloaded, thereby preventing failure of the main wiring harness. The main fuse consists of a plate metal jumper that easily melts when electrical overloads occur. Before replacing the main fuse, be sure to disconnect the battery. A replacement main fuse can always be purchased from the manufacturer's service center.
Warning! If the car stereo system is equipped with a security code, make sure you have the correct combination to activate the audio system before disconnecting the battery! The main fuse is located in the fuse box located in the engine compartment of the car, looks little different from other fuses and is changed in the same way. Remember that a failed main fuse must be replaced with a replacement fuse rated for the same amperage.