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4.16 An Introduction and overview of Electrical Systems

This presentation will allow for the viewer to begin to form an understanding of electrical systems

Ivan W. Anderson

on 22 January 2013

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Transcript of 4.16 An Introduction and overview of Electrical Systems

Electrical! Cruise Control
Memory seats
Electronic sunroofs
Antitheft systems
Automatic door locks
Keyless entry
Passive restraint systems
Alternate propulsion systems Various Electronic Chassis Control and Accessory Systems Lighting systems
Vehicle instrumentation systems
Windshield wipers
Electrical defoggers
Power mirrors
Power windows
Power door locks Various Electrical Accessories Purpose of the Charging System Purpose of the Starting System Most manufacturers network their electrical systems together though computers

Result may be that a faulty component causes several symptoms The Role of Electrical Systems in Today’s Vehicles Why become an Electrical Systems Technician?

Today there is not a system on the vehicle without electrical circuits

Today’s technician must possess a full and complete electrical background to be able to succeed Importance of Learning Automotive Electrical Systems Introduction to Automotive Electrical and Electronic Systems Alternate Propulsion Systems Passive Restraint Systems The Starting System
The Charging System
The Lighting System Interaction of the Electrical Systems Vehicle communication network
Multiplexing Role of the Computer in
Today’s Vehicles This is an introduction 4.16 Circuit controls
Fusible Link
Circuit Breaker
Series Parallel Circuits Measured in Ohms

The force that opposes the flow of electrons

Ohm’s Law I=V/R Current=Voltage /Resistance

Example : 12 volts/12 ohms = 1 Amp Resistance
Like amperage, this is the electrical way of measuring work done

Wattage= Amperage x Voltage Wattage Really….it safe! States that electricity flows from negative to positive

Conventional Theory
States that electricity flows from positive to negative Electron Theory Electricity Current following the path of least resistance and not making it to its intended target. Short circuits The movement of electrons Current Pressure difference
Polarity (+) or (-)
Causes movement
Pressure behind electrons force them to move Voltage Atom
Insulator The component in a circuit whose resistance will produce light, heat, or a magnetic field when current is pushed through it.

A load does work.

False load: the unwanted heat from the unwanted resistance in a circuit Loads Conductor= atoms that has 1 or 2 electrons in their valence orbit. Electrons are taken or given up easily

Insulator=atoms that do not give up or easily accept electrons.

Wiring=the larger number of the wire
the thinner it is:
4 gauge wire vs 18 gauge wire Insulators and Conductors To light an automotive light bulb it takes the movement of 6 billion billion electrons per second

= 1 ampere (amp)

Think of water in a river Current A bit deeper Electrons are negatively charged so they are attracted to positive
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