Auto Upkeep Basic Car Care, Maintenance, and Repair (2nd Edition) Chapter 1 - Introduction and How Cars Wor Auto Upkeep Basic Car Care, Maintenance, and Repair (2nd Edition) Chapter 9 Electrical System Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Chapter 1 - Introduction and How Cars Wor Fuel for Thought What is the purpose of an automotive battery? What is the difference between voltage, current, and resistance? Why is it important to replace a blown fuse with the correct amperage rating? Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Objectives Upon completion of this chapter and activities, you will be able to: Define electricity in terms of voltage, current, and resistance. Identify and describe the components in the starting and charging system. Explain battery performance ratings. Identify the importance of fuses in the electrical system. Test the starter and alternator. Clean and test a battery safely. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Electrical Terms Electricity is the flow of electrons. Conductors allow electron flow. Insulators restricts the flow of electrons. Voltage is the pressure pushing electrons (Electromotive force). Current is the quantity of electrons (Intensity). Resistance is the measure of electrical resistance. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Battery 12-Volt Systems Most automotive batteries are 12-volt DC. Each cell produces 2 to 2.1 volts. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Battery Ratings CCA – Cold Cranking Amps tested at 0ºF (-18ºC) CA – Cranking Amps tested at 32ºF (0ºC) Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Battery Maintenance Some batteries are permanently sealed. Others you can check the specific gravity in each cell. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Higher Voltage Systems Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Starting System Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Starter Converts electrical energy into mechanical energy to crank the engine. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Charging System Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Drive Belt The routing diagram can help you install a new belt. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Serpentine and V Serpentine V Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Alternator Converts mechanical energy to electrical energy to recharge the battery. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Fuses Fuse Junction Block Fuse Types Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Fuses – Blown Fuse Never replace with a higher amp rating. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

Flashers, Relays, and Circuit Breakers Flashers are used to operate turn signals and hazard lights. Relays allow a small current to control a circuit with a high current. Circuit breakers reset automatically. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Lights Automotive miniature bulbs Automotive headlights Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com PCM - Computer PCM – Powertrain Control Module Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com

© 2007 Rolling Hills Publishing www.AutoUpkeep.com Summary Clean and maintain your vehicle’s battery. Starting system converts chemical energy to electrical energy to mechanical energy. Charging system converts mechanical energy to electrical energy to chemical energy. Replace lights when they burn out for safety. The PCM stores trouble codes to help you diagnose problems. Chapter 9 © 2007 Rolling Hills Publishing www.AutoUpkeep.com