About This Class As an electric truck service technician, you need to know how the components of an electric truck work together to power and control the truck. This knowledge enables you to prevent, as well as troubleshoot and eliminate, electrical problems that affect truck performance. For this reason, the "Principles of Electricity'' class provided you with fundamental information about the nature of electricity and electrical circuits. In this class, "Schematics and Components," you use that information to learn about the electric truck's individual components-how they work and how they are represented on a schematic diagram. This class attempts to show you why the component is in the circuit and begins to explain the relationships between the components you see on the schematics. FutUI·e classes, however, will show you in detail how these circuit components interact to power and control the truck. Therefore you should not be concerned during this class if you do not fully understand the operation of the truck circuit. This manual consists of two sections: "Basic Schematic and Components" "Advanced Schematics and Components" Each section provides you with a list of learning objectives. The text then provides you with most of the information you need to reach these learning objectives. Additionally, your instructor will provide you with a class lecture, lead you through some hands-on exercises, and answer questions you may have. You will take a test at the end of the class to determine whether you have met the learning objectives.
About Safety When checking electrical components on an electric truck, always raise the drive wheels off the floor and put blocks under the truck, disconnect the battery, and discharge the capacitor. These actions prevent injury to yourself and damage to the truck. Always familiarize yourself with the safety information in the Operator's and Service Manuals before you operate or repair the truck.
Copyrighted Material
Schematics and Components page 2 Intended for CLARK dealers only Do not sell or distribute
