Lesson 1/Learning Event 2
Automotive repair manuals use several methods to present all the information that you need to
repair electrical systems. For instance, some of the information is presented through written words,
but a lot is presented through drawings and the use of SYMBOLS. A symbol is a sign or figure
that stands for something else. Symbols are especially useful in electricity, since they can be used
to show many things that are actually invisible.
Before you can read and obtain the needed information from electrical drawings (schematic
diagrams), you must know the meaning of the symbols that are used. Let's take a look at some
common symbols that are used in schematic diagrams of an automotive electrical circuit.