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Automotive electrical systems can be a mystery to the weekend mechanic, and even to the experienced professional. "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, Certified Master Technician Tracy Martin takes you on a guided tour of your vehicle's wiring system. The various troubleshooting and evaluation tools, such as multimeters and test lights, are also detailed. And the inclusion of handy tips will help you banish electrical gremlins.