Technician Handbook 623 Electrical Circuit Diagnosis Introduction Modern vehicles incorporate many electrical and electronic components and systems: To effectively troubleshoot these and other automotive systems, you need to know how to diagnose electrical circuits. • Audio • Lights • Navigation • Engine and emission control • Transmission control • Braking and traction control • Steering and suspension Electrical and electronic system troubleshooting can be straightforward if … • You know what to look for • You know how to select and use the appropriate tools and test equipment 6 Technical Training