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The complexities of modern vehicle electrics and electronic systems present challenges for even the most experienced technicians.

Vehicle Electrics Module 2 takes a practical approach to understanding vehicle electrics. It explains electrical system layouts, fault finding techniques and diagnostic routines.

Many electrical systems are now operated through multi function electronic control modules (ECM’s). Vehicle electrics and electronic systems have become decentralised; functions are distributed between several modules. Increased levels of functionality and programmable options have been made possible through the use of data bus networks and fibre optics.

Often, there may be several voltage distribution boxes located around a vehicle. In turn, each is responsible for the electrical systems in its zone. Even basic electrical equipment such as lights, horns, wipers, signalling and driver instrumentation systems are controlled in this way. This requires use of the diagnostic scan tool to test switch and sensor inputs and actuator outputs.

Such developments place further demands upon the knowledge and expertise of technicians. They need to be familiar with a wider range of diagnostic tools and fault finding techniques. Test lamps, power probes and LED’s are no longer adequate. This is because accurate test measurements cannot be made and may in fact do damage to sensitive electrical circuits if used incorrectly.

It is understandable then for technicians to be put off by the prospect of dealing with vehicle electrics. An electrical fault is often perceived to be more complex than it actually is. However, basic principles still apply. Many vehicle electrical faults still result from loose or poor connections, or even straight forward component failure.

With this in mind, the most important things that a technician really needs to diagnose a fault are a sound understanding of vehicle electrics and electrical theory, competency with use of test equipment and technical information, the ability to read wiring diagrams and adopt a methodical, logical approach.

The aim of Vehicle Electrics Module 2 is to present a practical approach to vehicle electrical fault finding and diagnostic techniques. During the course, you will gain knowledge and skills required for carrying out cost effective diagnosis of modern vehicle electrical systems.

By the end of this course, you will have gained an understanding of modern vehicle electrical systems. You will be able to carry out effective circuit testing and diagnosis. You will be able to select appropriate test tools and diagnostic equipment. You will be able to use these tools in conjunction with wiring diagrams and available technical information when working with vehicle electrics.