The 12 Volt Doctor s Alternator Book does the job of marine alternator trouble shooting. It simplifies the mysteries of the boat s alternator - the prime source of power on almost every boat. User friendly comb-bound style 8 1/2 inch x 11 inch size with large drawings that lay flat when open for hands-free work Simple drawings and clear instructions help the reader identify alternators and understand how they work Topics covered include: field instructions brushes internal regulators idiot light tachometer connection identification of terminals testing procedures emergency repairs connecting regulators and basics of how to take the alternator apart