Car owners can use vehicle diagrams to learn about the positioning of the vehicle’s systems. Diagrams can also be used for diagnostic, repair, maintenance and vehicle upgrade tasks. In addition, they can be used to compare a particular system in one vehicle to a similar system in another vehicle.
Vehicle diagrams can be found in owner’s manuals and on the manufacturer's website, usually under the owners’ section. Service and repair manuals also include vehicle diagrams and can be purchased at online manual databases such as Mitchell1, while some specialized companies, such as Wilson Auto Electric, offer a wiring diagram databases free of charge.