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Fuses & Circuit Breakers

The following generic answer applies to any electrical circuit, whether in a vehicle or in a building, or whether alternating current [AC] or direct current [DC].

Fuses [and Circuit Breakers] are safety devices designed and installed in electrical circuits to protect the conductors [wires] and other components from short circuit conditions and/or overload conditions which can cause extreme overheating of the conductors that can result in damage to the insulation and the conductors. And in a worst case, the probability of a FIRE which could destroy the vehicle, house, or other structure in which the circuit is located.

A fuse or circuit breaker that "blows" or "trips" is doing what it was designed, intended, and installed to do, protect the components of the circuit from the flow of excess electrical current.

Some ignorant few will suggest installing a larger fuse or breaker to solve the problem, BUT that will only increase the hazard, not correct it. Do not follow "bad" advice and install a larger fuse in a misguided attempt to correct the problem. To install an oversized fuse would almost guarantee damage to the wiring and an electrical system fire.

As to the direct answer to your question, any or all systems in a car can be [and usually are] protected by a fuse or circuit breaker.

Sometimes a fuse or circuit breaker, or even a fusible link protects several circuits each of which may be protected by their own dedicated fuse or breaker. Examples of this include the fusible link in a vehicle, usually located near the battery protects the entire system and all the circuits. Or in a building, a "main," or "master" breaker is used to protect all the other circuits in the system.

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15y ago

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