It covers advanced digital multimeter techniques, teaching users how to use voltmeters, ohmmeters, and ammeters to their full advantage.

When working with electrical systems:

The book is built on the philosophy that mechanics need to "see" what electricity is doing to repair it effectively. It distills 30 years of field experience into accessible lessons:

" Fundamental Electrical Troubleshooting " by Dan Sullivan is a highly acclaimed practical guide designed specifically for mechanics and technicians who work on vehicle electrical systems. Unlike dense engineering textbooks, Sullivan’s work—often referred to as the "FET Shopbook"—focuses on down-to-earth, hand-drawn explanations that make complex electrical concepts usable in a shop environment. Core Concepts of Sullivan's Troubleshooting Method

Sullivan emphasizes voltage drop as a critical diagnostic tool, noting it can tell you everything you need to know about a circuit's health.