Automotive Relay Circuit Guide

Book excerpt: This book is a comprehensive work on automotive relays and their circuit analysis. The book is also a companion to our Video-DVD series of the same title. Here, we analyze how automotive relays are connected with their peripheral components. Each section starts with the specifics of the components used in that circuit and then there's a deep analysis of how current flows on the circuit. The idea is to first explain and give the reader the particulars of each circuit, then go deeper and analyze why the circuit behaves the way it does, how to diagnose it and how to connect it in case the whole wiring is missing, obsolete or simply was never present to begin with. This book will help you not only in understanding automotive relay wiring and circuits, but is also instrumental in the event you needed to install a relay driven component on an older out of production vehicle. In many cases, the vehicle never had the system to begin with, as in for example a radiator fan motor on a car that always had a fan clutch. Many Toyotas came with a factory hydraulic radiator fan motor for whom parts are no longer available. Installing an electrical fan will definitely solve your problem, and here's where this book shines. The publisher and author take no responsibility for the work you do, so whatever you do is at your own risk. Special thanks to Carmen Diaz for her invaluable input on the cover layout, structure, arrangement and proofing.