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Your car's electrical system powers everything from the ingition 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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1. 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.
2. 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.
3. 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.
