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How to Read an Automotive Wiring Diagram?

1 Answers

VonLaila

07/30/25 5:43am

Being able to understand automotive wiring diagrams is fundamental knowledge for vehicle repair. Only by comprehending the wiring diagram can one grasp the characteristics and principles of automotive circuits, enabling the identification of fault causes in the shortest time when a vehicle malfunctions. The methods for reading are as follows: 1. Carefully read the diagram notes: Thoroughly review the diagram notes to understand the name and technical specifications of the wiring diagram, clarify the meanings of graphical symbols, and establish a one-to-one correspondence between components and graphical symbols. This will facilitate quick and accurate diagram interpretation. 2. Master the principle of circuits: In electrical theory, a circuit is the most basic, important, and simplest concept. Any complete circuit consists of a power source, electrical appliance, switch, wires, etc. For an electrical appliance to function properly, it must receive electrical energy. In a DC circuit, current always flows from the positive terminal of the power source, through wires, fuses, and switches to the electrical appliance, and then returns to the negative terminal of the same power source via wires (or grounding). If any part of this process is incorrect, the circuit will not function properly or effectively.

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