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| Your car's electrical system powers everything from the ignition and fuel systems to accessories such as your radio, headlights and wipers. The electrical system is, in turn, powered by the engine. Here are the three key components of the electrical system: |
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Battery
When your car's engine is off, the battery provides
the required power to the rest of the system, as well
as during start-up (cranking). It also supplements the
power from the charging system during periods of high
demand.
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Charging
System
This is the heart of the electrical system. It consists
of three main components: the belt-driven alternator,
various electrical circuits, and a voltage regulator.
The alternator supplies power to the electrical system
and recharges the battery after your car has started.
Just like it sounds, the voltage regulator controls
the voltage, keeping it within the operating range of
the electrical system.
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Starting
System
This system consumes more electrical power than any
other in your car. The starting system consists of three
components which work in tandem: the ignition switch,
the starter relay or solenoid, and the starter motor.
The ignition switch controls the starter solenoid, which
activates the starter motor. The starter motor then
turns the engine until your car starts.
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