The other major issue within a car electrical system is that not all components tolerate the same amount of current strength or amperage. Therefore, the system must include voltage regulators and fuses to moderate flow and protect components that cannot handle the amperage supplied by the alternator. Fuses protect circuits when placed in front of the load (component). If a voltage spike causes too much amperage sent to the headlights, a fuse designed to “blow” at 15 amps will do so, preventing the current from continuing on to cook the headlight itself.
Today’s vehicles are made up of a number of systems working together in harmony. It would be impossible to remove one of these systems (fuel, for example) and still have a car that drives. So while you can’t necessarily say the car electrical system is the “most important,” it does come pretty close — especially as the technology veers toward a hybrid and electric future. Here is a quick overview of electrical system components and a look into how conventional gas engine-powered vehicles use electricity.
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