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2. Each fuse protects a specific target (or several chains). These circuits are marked on the fuse box housing.
3. The fuse box contains miniature blade-type fuses that are easy to insert and remove without any special tools. If a circuit malfunction occurs in your vehicle, first check the corresponding fuse. To check the fuses, turn on the ignition and check the voltage at one terminal of the fuse, then at the second terminal. If voltage is present in both cases, then the fuse is good. If voltage is present at only one terminal of the fuse, the fuse is faulty. The fuse is easy to check for proper operation after removing it, as the fuse has a transparent housing. Inspect the wire running inside the fuse box to make sure it is. that it is not melted (figure 3.3).
4. Make sure the spare fuse has the same rating. Fuses of different ratings are interchangeable. however, fuses that have failed should only be replaced with fuses of the same rating. It is not recommended to install fuses with a lower or higher rating. Each electrical circuit is rated for a specific maximum current. The rating of each fuse is indicated on the fuse box cover.
5. If the blown fuse immediately blows, this indicates a more serious circuit fault. Do not replace the fuse again until the problem has been corrected. In most cases, the fault is due to a short circuit due to worn wire insulation or a faulty component.
6. All vehicle models have a main fuse rated at 100A which protects all circuits between the battery and the appropriate purpose fuse. When too much current is drawn, the main fuse will blow, protecting the vehicle's electrical system. The main fuse has a fusible metal strip that melts when overloaded. Before replacing the main fuse (which can be purchased from a dealer) disconnect the battery.
Warning. Your car's radio has an anti-theft system. Before disconnecting the battery, please read the information at the beginning of this manual.
The main fuse is located in the engine compartment fuse box. It is similar to other fuses and is replaced in a similar manner. Install a new fuse of the same rating as the old one. In other words, if your vehicle came with an 80A fuse, install an 80A fuse; if a 100 A fuse was installed, install a fuse with a rating of 100 A. Do not change the rating of the main fuse!
[The article is reprinted from the portal: mazbook]