An auto electrician is an automotive professional who installs, inspects, maintains and repairs all electrical parts of automotive vehicles. They typically work on cars, trucks, buses and other vehicles in the transportation industry. Some auto electricians also work on inspecting and repairing agricultural equipment.

It had only switches, wires, relays and controlled motors as its key components but today’s electrical system includes sensors, actuators, alternators, battery, oxygen sensors, generator, starter solenoid, starter drive, high power electrical system and other devices.