Electrical Systems in Vehicles

Front

Electrical System

Back

Network of components that generate, store, and distribute electricity

Front

Battery

Back

Stores electrical energy; typically 12 volts

Front

Alternator

Back

Converts mechanical to electrical energy; charges battery

Front

Starter Motor

Back

Uses electrical energy to start engine

Front

Fuse

Back

Protects circuits; breaks circuit if current too high

Front

Relay

Back

Electrically operated switch; controls high power circuits

Front

Wiring Harness

Back

Bundle of wires; transmits electrical power and signals

Front

ECU (Engine Control Unit)

Back

Computer that controls engine functions

Front

Grounding

Back

Connects circuits to chassis; ensures safety

Front

Voltage Regulator

Back

Maintains constant voltage; protects components