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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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