Ignition Switch Wiring Diagram Chevy: An Ultimate Guide

If you own or are planning to own a Chevy, having a clear understanding of the ignition switch wiring diagram is crucial. The ignition switch is responsible for starting your engine and powering many of your car’s accessories. Therefore, it’s important to have a proper wiring diagram to ensure smooth operation of your car. In this article, we’ll delve into the details of the ignition switch wiring diagram for Chevy.

Basic Ignition Switch Wiring

The basic wiring of a Chevy ignition switch involves connecting the battery and starter motor to the switch, and then wiring the switch to the dashboard and other accessories. The ignition switch has four positions: OFF, ACC, RUN, and START. Each position has specific wiring connections.

The switch’s OFF position is when the engine is not running, and all wires are cut off from the battery. The ACC (accessory) position is when the key is in the ignition, but the engine is not running. The car’s accessories, such as the radio, headlights, and air conditioning, are powered in this position. The RUN position is when the key is turned to “ON” before starting the engine. The car’s electrical system is powered in this position. Finally, the START position is when the key is turned to start the engine.

Wiring Diagram Overview

The ignition switch wiring diagram for Chevy is divided into two sections: engine and accessory wiring. The engine wiring typically begins at the battery and runs through the ignition switch to the starter motor. On the other hand, the accessory wiring starts at the ignition switch and powers all accessories in the car. Both sections have unique wiring connections, and it’s essential to have a clear understanding of each connection.

In modern Chevys, the most common ignition switch wiring configuration follows the color code. The red wire powers the ignition switch from the battery, while the yellow wire powers the car’s accessories. The purple wire runs from the ignition to the starter motor solenoid. The orange wire powers the car’s starter, while the brown wire powers the alternator. The black wire provides a ground connection.

Table of Connections

Here’s a simple table of connections in the ignition switch wiring diagram:

Switch Position | Switch Connection


OFF | No Connection

ACC | Red and Yellow

RUN | Purple and Yellow

START | Purple, Orange, and Yellow


The ignition switch wiring diagram for Chevy is an essential guide for car owners. It helps you understand the wiring connections involved in starting your car and powering all its accessories. Understanding the connection of wires helps in troubleshooting any electrical problems with the car. So, make sure you have a proper ignition switch wiring diagram for Chevy and always seek help from a professional if you encounter any electrical issues.

Leave a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Scroll to Top