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Where is the main relay on a 91 Civic DX?

The main relay on a 1991 Honda Civic DX is a critical component that controls the flow of electricity to various systems in the vehicle. Its location is important to know when troubleshooting electrical issues or performing maintenance. In this article, we'll provide a detailed guide on where to find the main relay on a 1991 Civic DX.


Where is the Main Relay Located?


The main relay on a 1991 Honda Civic DX is typically located in the engine compartment, near the firewall on the driver's side of the vehicle. The main relay is usually mounted on the fuse/relay box or on a separate bracket. To access the main relay, you'll need to remove the engine cover or other components to gain access to the fuse/relay box area.,p>

Identifying the Main Relay


Once you've located the fuse/relay box, the main relay will be one of the larger relays in the box. It is usually labeled "Main Relay" or something similar. The main relay is responsible for supplying power to various systems in the vehicle, such as the fuel pump, ignition system, and engine control unit.p>

Troubleshooting the Main Relay



  • If you suspect an issue with the main relay, you can test it using a multimeter to check for proper voltage and continuity.

  • If the main relay is faulty, it will need to be replaced to restore proper electrical function to the vehicle.

  • Replacing the main relay is a relatively straightforward process, but it's important to consult your vehicle's service manual for the specific steps.


By following these steps, you should be able to locate and identify the main relay on your 1991 Honda Civic DX. Proper maintenance and troubleshooting of this critical component can help ensure the reliable operation of your vehicle.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.