An auto electrical wiring diagram is a graphical representation of the electrical system of a vehicle. It shows the various components and how they are connected in the electrical system of the vehicle. The diagram is typically divided into sections or subsystems, such as the engine control module (ECM), charging system, lighting system, and so on.

Auto electrical wiring diagrams can be found in the vehicle manufacturer’s service manuals, which are often available online or in print. These diagrams may also be available from aftermarket repair manuals or online resources. Some auto repair shops may also have access to wiring diagrams for the vehicles they service.

It is important to use the correct wiring diagram for the specific make, model, and year of the vehicle being serviced. Using an incorrect wiring diagram can lead to electrical issues and potentially cause damage to the vehicle or even pose a safety hazard.

Auto electrical wiring diagrams can be complex and difficult to interpret, especially for those who are not familiar with automotive electrical systems. It is important to have a good understanding of electrical theory and the operation of the various components in order to properly diagnose and repair electrical issues in a vehicle.