So, the electrical system, is way more, than just the stuff you see under the hood.
Because, the electrical system includes every wire in your vehicle. Consequently, apart from the main battery, charging, starting and ignition circuits, there are many other circuits. All electrical circuits in vehicles, are opened and closed, either by switches or relays. And, fuses are used, to prevent them from overloads. Some, even have circuit breakers.
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Automotive Battery – Starts Engine, Adds Power, Stabilizes Voltage
Automotive Relays – Are Used To Control, Hi Amperage Circuits
Car Alternator – Powers The Accessories, And Charges The Battery
Car Starter Motors Are Used, To Turn The Engine Over For Starting
BY DANNY BENDER