Basic car wiring diagram
Battery
* Power supply for the entire electrical system.
Generator
* Charges the battery and provides power to electrical components when the engine is running.
Starter
* Turns on the engine.
Fuses and relays
* Protect electrical circuits from overloads.
* Turn devices and systems on and off.
Body
* Serves as a ground for the electrical system.
Wires
* Connect electrical components.
*Have different gauges to handle different current levels.
Main relay
*Connects the battery to the electrical system after starting the engine.
Ignition switch
* Controls the flow of electricity to the starter and ignition.
Ignition
* Creates the spark needed to start the engine.
Fuel system
* Provides fuel to the engine.
*Electrically dependent on pump and injectors.
Lighting system
* Provides illumination for driving at night and in poor visibility conditions.
* May include headlights, taillights, turn signals and hazard lights.
Signage system
* Informs other road users of your intentions.
* May include turn signals, brake lights and reverse lights.
Security system
* Provides protection against theft and accidents.
* May include alarm, airbags and anti-lock brakes.
Comfort systems
* Increase convenience for passengers.
*May include air conditioning, stereo, power windows and heated seats.
Electrical auxiliary systems
* Provide additional functionality and convenience.
*May include power steering, cruise control and remote start.