Fuse blocks protect a vehicle’s electrical devices from short circuits or surges. They contain fuses rated at different amperage ratings. Changing a fuse is simple, but it’s important to use the same amperage fuse. Fuse blocks can be found on the dash or in the engine compartment. They don’t need maintenance but should be kept dry and free of debris.
Fuse blocks are important electrical components intended to protect a vehicle’s electrical devices against short circuits or surges. Fuse blocks contain fuses rated at different amperage ratings depending on the electrical device it is protecting. In the event of a sudden voltage spike or short, the fuse will blow, protecting the affected device.
Changing an automotive fuse is a simple operation. Once the appropriate blown fuse has been located, it is removed from its mounting location within the fuse block. A new fuse is simply inserted into the vacated location on the fuse block. It is imperative that the same amperage fuse is used when changing any blown fuse.
Automotive fuse blocks use 15 to 30 amp fuses. This rating matches the ability of a particular electrical component to withstand damage. Fuse blocks are designed to allow the fuse to blow or blow out before the component can be damaged. Replacing any blown fuse with a higher amperage rating fuse could cause irreparable damage to the vehicle’s electrical component.
There are several different types of fuses located within fuse blocks. Vehicles built before 1980 may have glass fuses. The most common plastic insert fuses were used in fuse blocks from the 1980s to the present throughout the world. Found in limited use are mini fuses. These fuses look like plastic, snap-type fuses; However, they are much smaller.
Fuse blocks can be found on the dash of most vehicles. Some vehicles have fuse blocks located inside the engine compartment. Consult a vehicle’s operator’s manual to find the location of the fuse block. It’s a good idea to locate the fuse block and become familiar with the fuse locations throughout the day. This alleviates the difficulty of locating a particular fuse in the dark in case a problem should arise.
While the typical automotive fuse block is designed to work for the life of the vehicle, there is occasionally a need to replace it. Many aftermarket companies make replacement fuse blocks and wiring systems. Many of these are color coded with the wiring colors of the particular vehicle manufacturer. Others are labeled on the cable itself as to their purpose.
Automotive fuse blocks do not need particular maintenance. However, it is important that the fuse block is kept dry and free of debris. There must be free airflow provided to the fuse block to prevent heat buildup. An occasional fuse check to locate any loose fuses should be part of a vehicle’s preventative maintenance routine.
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