Head Location

10A Bellevue Crescent, Preston 3072

Clock Icon

Mon-Fri - 7:30AM – 5:00PM
Saturday to 8.00am – 1.30pm
by appointment

Inner Banner
What Is Your Car’s Electrical System?
Inner Banner Car
Det Img

Most vehicles on the road today have complex electrical systems that are responsible for many functions. These electrical components seem to get more and more advanced with each passing year to a point where very few mechanics today have the skills and experience that are needed for maintaining these systems.

Just like all other components of your car, these systems also need to be maintained and they can also start malfunctioning over time. Here is a quick look at your car’s electrical system and how these systems should be maintained.


Your car’s ECU is more commonly referred to as its computer box. This little box is the brain of your car and controls most of the electrical components and functions in your car. It is responsible for handling the electronic fuel injection sensors on the carbonator, handles the EFI system which controls the functions in computer-controlled engines, mans the ABS braking systems, manages the traction control system, kicks in autonomous emergency braking, mans the adaptive cruise control and so much more. 

The Battery

The battery is, of course, one of the most important electrical components of your car. The average battery lasts 3 – 5 years before a replacement is needed and it powers various elements when the car isn’t running like the starter, car radio, parts of the air conditioning, lights and much more.

Headlights, Brake Lights, And Indicators

All of the lights in your car are connected to the battery and some are also controlled by the ECU and will switch off automatically when you turn off the car or might switch on automatically when it gets dark. These lights are important for illuminating your way and indicating to others when you are turning or stopping. 

The Alternator

This is a device that handles the electric current running through your vehicle. It is also responsible for creating combustion in the engine and for recharging your battery so you can start it up again after parking it for hours.

The Starter

The starter is usually connected directly to the battery and acts as a power supply that gets the engine up and running. A starter that isn’t firing up is usually a sign that the battery might be flat.

The Air Conditioning System

Modern air conditioners have many electronic features like climate control. Vehicle air conditioners usually have their own individual computer box that mans these functions and is then connected to the car’s main computer box so AC issues can be detected via diagnostic checks.

The Audio System

The radio and all speakers are part of your car’s electric system and are usually powered directly from the car battery. The audio system can mostly be powered even if the car engine isn’t running. In modern cars, audio systems can be quite advanced with surround sound speakers, Bluetooth connectivity, LCD screens, and the works.

Back and Front Cameras

A lot of vehicles today have reverse cameras that make it much easier to reverse the car out of tight areas without bumping into something. Some vehicles like police vehicles are also fitted with front cameras that can help document the car owner’s actions for legal purposes. 
Modern vehicle electrical systems are much more than just simple wiring connected to a battery pack. There are lots of delicate components and electronic control units and sensors that keep these systems functioning properly. It is very important to never attempt to adjust or fix these systems yourself. Always use professionals like Kendon Auto Electrical and Mechanical for any electronic flaws you might pick up. With a professional doing your repairs, your vehicle will stay in good running condition and you can avoid dangerous situations like electric circuits and fires.

    Contact Us