A blown car fuse is caused by excess electric current. The current heats and melts the fuse which then interrupts the flow of electricity. A faulty fuse is the most common cause of a variety of electrical problems including interior lighting, the radio, or even powertrain electronics and safety features in a vehicle.
In order to identify a bad fuse, first visually inspect the fuse itself. Most fuses are clear, making it easy to see the internal components. If you notice a gap in the wire or a dark, metallic smear inside the fuse glass it’s definitely blown and needs to be replaced.
It is important to note that automotive fuses rarely go bad due to corrosion. This is because the metals inside a standard fuse have different gauges and thicknesses which determine how much power they can handle. Each fuse has a specific amount of amps it can pull before it will overheat and melt. This is why it is a good idea to check fuses on a regular basis to ensure they aren’t blown or corroded.
Replacing a car fuse is a fairly simple process that can be done in just a few steps. However, it is always recommended that you take your vehicle to a mechanic when there are electrical problems. This way, they can identify if there is a larger problem and get it fixed before it blows other fuses and damages your vehicle further.