Quantcast PICTORIAL DIAGRAM

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3-7 To identify the components of a system To trace a circuit The troubleshoot equipment The repair equipment. When you have completed this subject, you should be able to recognize the relationship between the various diagrams, their distinguishing features, and the purpose of each type of diagram. A continuing reference to the figures in the text should help you understand the subject matter more clearly. We will use a simplified drawing of the electrical system of an automobile to explain the various electrical diagrams and how to "read" them. PICTORIAL DIAGRAM The simplest of all diagrams is the pictorial diagram. It shows a picture or sketch of the various components of a specific system and the wiring between these components. This simplified diagram provides the means to readily identify the components of a system, even if you are not familiar with their physical appearance. This type of diagram shows the various components without regard to their physical location, how the wiring is marked, or how the wiring is routed. It does, however, show you the sequence in which the components are connected. Figure 3-6  is a pictorial diagram of an automobile starting and ignition system. If you are not already familiar with the components of this system, study the diagram. You should then be able to recognize the physical appearance of each component and its interconnections with the other components of the system. Figure 3-6.—Pictorial diagram of automotive starter and ignition systems.


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