A comprehensive steering column diagram depicts the components in the steering column and their arrangement. Each component is numbered and labeled, making it easy to obtain the required parts and assemble them correctly.
Another important type of automotive diagram is the wiring diagram, or schematic, which displays the type and arrangement of wires and circuits within a vehicle. These diagrams are essential due to the wide variety of wiring types in each vehicle and the complex circuitry essential for safe operation.
Unlike other automotive diagrams, wiring schematics do not depict the true length and position of the vehicle's wires. Instead, these charts use lines and other symbols to represent electrical circuits. Special symbols listed in the schematic key represent the wire type, gauge and its connections.
Many wiring schematics also use letters to indicate wire color. For example, a wire marked O is an orange wire, and a wire marked OB is orange with a black stripe. This information simplifies electrical troubleshooting by reducing the risk of testing the wrong wires. However, interpreting a vehicle-wide wiring schematic is still difficult and complex, especially for home mechanics. To reduce this problem, many manufacturers also publish simplified wiring diagrams for individual systems. These make it much easier to diagnose problems quickly and accurately.