Electrical and Lights

When you switch on the ignition, turn on the radio, operate the windshield wipers, and crank up those seat warmers, your vehicle's electrical system is what provides the power.

While the battery is what initially starts the vehicle (and serves as a backup power supply), during vehicle operation, the electrical system is powered by the alternator. Through a network of wires, the electrical system powers various components like the head lights, airbags, power windows and doors, and GPS. The wires are protected by fuses, much like fuses or circuit breakers protect the wiring in your home.

Modern vehicles have a complex network of computer systems—some cars can have up to one hundred individual computers—which require highly advanced electrical systems. Working on these sophisticated systems requires specialized training and equipment, which is why auto repairs can be so expensive.