This automotive electrical diagnostic and repair book is the best on the market. How electric works is explained in a clear and easy to understand manner that even the most clueless person will be able to comprehend. Better still the entire 'voltage drop' testing procedure with a multimeter is fully explained with the aid of diagrams giving precise information on where to put the probes and what to expect from the meters readings. If you are unsure on how to use a multimeter, this book will help you beyond any doubt. There are nine chapters in total - 1) Ohms Law 2) Voltage Drop Testing 3) Electronic Testing Tools 4) Storage Battery 5) Charging and Starting Systems 6) Ignition Systems 7) Fuel Injection Systems 8) Wiring Diagrams 9) Troubleshooting Electrical Systems. Each chapter goes into detail and offers easy to follow advice. All types of ignition systems are covered from the old style points and condensor system to the distributorless systems fitted in modern cars. In reality the book seems to lean more towards modern cars than the older car, but don't let that put you off. The author gives a lot of advice on how to minimize damage occuring during testing, like for example, electronic ignition systems and ECU computers. If reading a wiring diagram leaves you cold, this book will help no end in clearing up confusion that often descends whilst trying to understand a wiring diagram. Simply put, you really can't go wrong with this book! This book will not tell you how to solder or cover thing like overdrive units, but it will aid you greatly in being able to diagnose and repair ant electrical problem and offer invaluable advise on how to test systems with a multimeter. The power probe 3 or similar devices are not covered in chapter 3 or indeed anywhere within this book.