What is the purpose of a fuse in a vehicle's electrical system?

The purpose of a fuse in a vehicle's electrical system is to protect wiring from overload. Fuses are designed to be the weak link in the electrical circuit; they will blow (or break) when the current exceeds a certain level, thereby interrupting the flow of electricity. This prevents excessive current from passing through the vehicle’s wiring, which could lead to overheating, melting insulation, and potentially causing electrical fires or severe damage to components.

By breaking the circuit in the event of an overload, fuses help to ensure the safety and longevity of the vehicle’s electrical system. This protective function is critical because it helps safeguard sensitive electronic components from damage that could occur due to a sudden surge in electrical current.