# Automotive Electrical Wiring Diagram Symbols

By | September 14, 2023

## Automotive Electrical Wiring Diagram Symbols

Automotive electrical wiring diagrams are essential for understanding how the electrical system of a vehicle works. They are used by both mechanics and DIYers to troubleshoot problems and make repairs. This article will discuss the different types of symbols used in automotive electrical wiring diagrams, as well as how to interpret them. We will also provide some tips on how to create your own wiring diagrams.

### Types of Symbols

The symbols used in automotive electrical wiring diagrams are standardized by the Society of Automotive Engineers (SAE). This means that the same symbols are used on wiring diagrams for all makes and models of vehicles. The most common symbols are listed below: *

### Battery:

A battery is represented by a circle with two parallel lines inside. The positive terminal is at the top of the circle, and the negative terminal is at the bottom. *

### Alternator:

An alternator is represented by a square with a wavy line inside. The positive terminal is at the top of the square, and the negative terminal is at the bottom. *

### Starter:

A starter is represented by a triangle with a line inside. The point of the triangle is at the positive terminal, and the base of the triangle is at the negative terminal. *

### Light bulb:

A light bulb is represented by a circle with a dot inside. The dot represents the filament. *

### Switch:

A switch is represented by a square with a line inside. The line represents the moving contact. *

### Fuse:

A fuse is represented by a rectangular box with two parallel lines inside. The parallel lines represent the fuse element. *

### Connector:

A connector is represented by a rectangle with two parallel lines inside. The parallel lines represent the connector terminals.

### Interpreting Wiring Diagrams

Once you know the different symbols, you can start to interpret automotive electrical wiring diagrams. The following steps will help you get started: 1. Find the main power source, which is usually the battery. 2. Trace the wires from the power source to the different components in the system. 3. Identify the different symbols and their corresponding components. 4. Make sure that all of the wires are connected correctly. If you are having trouble interpreting a wiring diagram, you can always consult a mechanic or a qualified DIYer.

### Creating Your Own Wiring Diagrams

If you need to create your own wiring diagram, there are a few things you need to keep in mind. First, make sure that you use the correct symbols. You can find a list of the standard SAE symbols online. Second, make sure that your diagram is clear and easy to read. Use different colors for different wires, and label each component clearly. Third, make sure that your diagram is accurate. Double-check your work before you use it to make repairs. Creating your own wiring diagram can be a challenging task, but it is also a rewarding one. By following these tips, you can create a diagram that will help you troubleshoot and repair electrical problems in your vehicle.

* [SAE J1113: Standard Symbols for Electrical and Electronic Diagrams](https://www.sae.org/standards/content/j1113_201707/) * [How to Read an Automotive Wiring Diagram](https://www.autozone.com/diy/electrical/how-to-read-an-automotive-wiring-diagram) * [How to Create an Automotive Wiring Diagram](https://www.eautorepair.net/how-to-create-an-automotive-wiring-diagram/)

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