12v USB Socket Wiring Diagram

In today’s world, staying connected to our electronic devices is more important than ever. Whether we’re on the road or just out and about, we need to be able to charge our phones, tablets, and other devices. One great way to do this is by installing a 12v USB socket in your car or other vehicle. Here’s everything you need to know about wiring a 12v USB socket.

What Is a 12v USB Socket?

A 12v USB socket is a small device that you can install in your car or other vehicle that allows you to charge USB-powered electronic devices. It connects to your vehicle’s 12v power source and provides a USB port that you can use to plug in your devices. This is a convenient way to keep your phone, tablet, GPS, or other device charged while you’re on the go.

Installing a 12v USB socket is simple and straightforward. Here’s what you need to know.

Materials You’ll Need

Before you get started, you’ll need to gather a few materials:

12v USB socket Wire stripper/cutter Electrical tape
Ring terminal Fuse holder and fuse Wire crimpers
Wire connectors Wire (14-16 gauge)

Step-by-Step Instructions

Step 1: Choose a Location

The first step is to choose a location for your 12v USB socket. You’ll want to find a spot that’s convenient for you to access, but also out of the way so it doesn’t get bumped or damaged. Some good options include the dashboard, center console, or glove box.

Step 2: Prepare the Wires

Next, you’ll need to prepare the wires that will connect the 12v USB socket to your car’s power source. Use your wire stripper/cutter to remove about ½ inch of insulation from the end of each wire. Then, use your wire crimpers to attach a ring terminal to one end of each wire.

Step 3: Install the Fuse Holder

The next step is to install the fuse holder. Cut a length of wire that will run from your car’s power source to the fuse holder, and another length that will run from the fuse holder to the 12v USB socket. Strip about ½ inch of insulation from each end of these wires and attach them to the fuse holder using wire connectors.

Then, attach the fuse holder to your car’s power source. You can do this by using a ring terminal to connect the wire from the power source to one end of the fuse holder, and then connecting the other end of the fuse holder to the wire that runs to the 12v USB socket.

Step 4: Connect the Wires

The final step is to connect the wires from the 12v USB socket to the fuse holder. Use wire connectors to attach the wire from the USB socket to the other end of the fuse holder. Then, use electrical tape to cover any exposed wires and secure the connections.


What Types of Devices Can I Charge with a 12v USB Socket?

A 12v USB socket can be used to charge any USB-powered device, including smartphones, tablets, GPS units, and more.

Do I Need to Install a Fuse?

Yes, it’s important to install a fuse to protect your car’s electrical system and your devices. Choose a fuse that’s appropriate for the amperage of your 12v USB socket.

Can I Install More Than One 12v USB Socket?

Yes, you can install multiple 12v USB sockets in your car or other vehicle. However, be sure to install a fuse for each socket.

Can I Install a 12v USB Socket in My Boat?

Yes, a 12v USB socket can be installed in a boat or other marine vehicle. Be sure to choose a waterproof socket and follow all applicable marine wiring regulations.

Can I Wire a 12v USB Socket to a Solar Panel?

Yes, a 12v USB socket can be wired to a solar panel. However, you’ll need to use a charge controller to regulate the voltage and protect your devices.