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Definition: The battery, wires and electrically operated accessories in a vehicle. All modern passenger cars, light trucks and most large motorcycles have 12-volt electrical systems. Farm tractors, most small motorcycles, antique cars and pre-1967 Volkswagens have 6-volt electrical systems. Most heavy-duty trucks use 24-volt systems. The electrical system uses the battery and charging system as its power source, with wires and switches routing the voltage to where it's needed. The metal body serves as the ground or return path for the voltage back to the battery. The electrical system is protected against damage by various devices (See Circuit Breaker, Fuse and Relay). Most electrical problems fall into one of three basic categories: poor ground connections (loose or corroded), opens (breaks in circuit wires, connectors or switches), or shorts (grounded circuit wires or switches). A test light, ohmmeter and/or voltmeter can be used to find the fault.
Related Resources:
Electrical Troubleshooting: Part 1
What tools you'll need to have and how to do it successfully.Electrical Troubleshooting: Part 2
What tools you'll need to have and how to do it successfully.DIY: Replacing Your Battery
A battery can last four to five years with proper care, although battery failure can occur in as little as three years in very cold or hot climatesThe Charging System - Part 1: The Battery
A look at the charging system, the parts and how they work.The Charging System - Part 2: The Alternator
A look at the charging system, the parts and how they work.Power Shortage
Will the cars of the future have all the electrical power they need to operate efficiently?
© 2000 - 2002 Vincent T. Ciulla
