12v Accessory Socket Wiring Diagram

When it comes to wiring an accessory socket in your vehicle, it can be overwhelming and confusing. Whether you need it for charging your phone or powering a GPS, it’s crucial to get it right the first time. That’s why we’ve created this guide to help you understand the basics and provide you with a 12v accessory socket wiring diagram.

What is a 12v Accessory Socket?

A 12v accessory socket, also known as a cigarette lighter socket, is a power outlet commonly found in vehicles. It’s typically used to power portable devices like cell phones, GPS units, or other electronic accessories. Most cars come equipped with at least one 12v accessory socket, but some models may have several.

How Does it Work?

The 12v accessory socket works by receiving power from the car’s battery when the ignition is turned on. This power is then transferred to any devices that are plugged into the socket, allowing them to charge or operate.

What is the Difference Between a 12v Accessory Socket and a USB Port?

A USB port is a type of 12v accessory socket that also includes the ability to charge devices with a USB cable. The main difference is that a standard accessory socket can power any device that uses a cigarette lighter plug, while a USB port can only charge devices with a USB cable.

Wiring a 12v Accessory Socket

Wiring a 12v accessory socket is a relatively simple process, but it’s important to follow the proper steps to ensure that it’s done correctly. Here’s a step-by-step guide:

Step 1: Gather Your Materials

Before you begin, you’ll need a few tools and materials:

  • 12v Accessory Socket
  • Insulated Wire
  • Fuse Holder
  • Fuse (10-amp recommended)
  • Wire Strippers
  • Wire Crimpers
  • Electrical Tape

Step 2: Locate a Power Source

The first step is to locate a power source in your vehicle. You can usually find one either in the dashboard or under the hood. Look for a wire that’s connected to the car’s battery or fuse box.

Step 3: Connect the Fuse Holder

Next, connect the fuse holder to the power source wire. Cut the wire and strip back a small section of insulation. Then, crimp the wire connector onto the end of the wire and connect it to one end of the fuse holder.

Step 4: Connect the Accessory Socket

Now, connect the other end of the fuse holder to one of the terminals on the accessory socket. Strip back a small section of insulation on the other end of the wire and crimp on a connector. Then, connect it to the other terminal on the accessory socket.

Step 5: Insulate Your Connections

Once you’ve connected everything, wrap each connection with electrical tape to insulate it and protect against short circuits. Make sure that each wire is securely connected and won’t come loose while driving.

12v Accessory Socket Wiring Diagram

Here’s a diagram that shows how to wire a 12v accessory socket:

Step 1: Locate a Power Source
Power Source ImageSource: bing.com
Step 2: Connect the Fuse Holder
Fuse Holder ImageSource: bing.com
Step 3: Connect the Accessory Socket
Accessory Socket ImageSource: bing.com


What size fuse should I use for my accessory socket?

We recommend using a 10-amp fuse for your accessory socket. This will provide enough power to charge most devices without risking damage to your car’s electrical system.

Can I wire multiple accessory sockets in my car?

Yes, you can wire multiple accessory sockets in your car, but you’ll need to make sure that your car’s electrical system can handle the additional load. It’s also important to use a fuse for each socket and to make sure that your wiring is properly insulated and secured.

Can I use a USB adapter in my accessory socket?

Yes, you can use a USB adapter in your accessory socket as long as it’s rated for the appropriate voltage and amperage. It’s important to check the adapter’s specifications and to make sure that it won’t overload your car’s electrical system.

What should I do if my accessory socket stops working?

If your accessory socket stops working, the first thing to check is the fuse. If the fuse is blown, replace it with a new one of the same amperage. If the fuse is fine, you may need to check the wiring connections to make sure that they’re secure and properly insulated.

Can I install an accessory socket myself?

Yes, you can install an accessory socket yourself as long as you follow the proper steps and take the necessary safety precautions. If you’re not comfortable working with electrical systems, it’s best to leave the job to a professional.

With this guide and diagram, you should be able to successfully wire a 12v accessory socket in your vehicle. Remember to always prioritize safety and follow the proper steps to avoid any potential problems.