Tracy Martin explains the principles behind automotive electrical systems and how they work. This book details the various tools, such as multimeters and test lights, that can be used to evaluate and troubleshoot any vehicle's electrical system. Several hands-on projects take readers on a guided tour of their vehicle's electrical system and demonstrate how to fix specific problems. Automotive electrical systems can be a mystery to the weekend mechanic, and even the experienced professional. No longer shall you fear the mass of wires under your dash and beneath the hood of your vehicle. How To Diagnose and Repair Automotive Electrical Systems explains the principles behind automotive electrical systems and describes how they work. From Ohm's Law to reading wiring diagrams to specific electrical scenarios, author and ASE (Automotive Service Excellence) Certified Master Technician Tracy Martin takes you on a guided tour of your vehicle's electrical system. Martin details the various tools, such as multimeters and test lights, that can be used to evaluate and troubleshoot any vehicle's electrical system, dishing out handy tips to help you banish your electrical gremlins. Don't get lost in the darkness again. The knowledge contained in How To Diagnose and Repair Automotive Electrical Systems is your best tool for understanding your electrical system and diagnosing problems in your vehicle.