Tracy Martin (tracyamartin.com) is the author of five Motorbooks Workshop series books, including, How To Use Automotive Diagnostic Scanners, How To Diagnose and Repair Automotive Electrical Systems, Motorcycle Electrical Systems Troubleshooting and Repair, How to Tune and Modify Motorcycle Engine Management Systems, and How to Troubleshoot, Repair and Modify Motorcycle Electrical Systems. He also co-authored the Motorcycling Safety Foundation's Guide to Motorcycling Excellence. Tracy is a regular contributor to several national magazines, including, Motorcycle Consumer News, RoadBike, American Iron Dealer News, and others. Tracy's automotive carrier begin as a high-school auto shop teacher and he has been a consultant for Sun Electric, Nissan of North American, Snap-On Tools, and other automotive aftermarket companies. When he's not writing he teaches advanced motorcycle skills and plays the banjo.