12 Volt Rocker Switch Wiring Diagram

When it comes to controlling electrical devices, rocker switches are one of the most popular options out there. They are simple to operate, and they come in various sizes and configurations, making them versatile for all sorts of applications. In this article, we’ll take a closer look at how to wire a 12 volt rocker switch and guide you through the process step-by-step.

What is a Rocker Switch?

A rocker switch is an ON/OFF switch that rocks back and forth when pressed. It has a built-in spring mechanism that returns the switch to its original position when released. Rocker switches come in different styles, including single-pole/single-throw (SPST), double-pole/single-throw (DPST), and double-pole/double-throw (DPDT).

SPST switches are the most common type and are used to control a single circuit. DPST switches, on the other hand, control two circuits simultaneously with one ON position and one OFF position. DPDT switches are used to control two circuits with two ON positions and two OFF positions.

Wiring a 12 Volt Rocker Switch

Wiring a 12 volt rocker switch is a straightforward process that requires only a few tools and a little bit of technical know-how. In this section, we’ll show you how to wire a simple ON/OFF rocker switch for a 12 volt system.

Step 1: Gather Your Materials

Before you begin, make sure you have the following materials:

Materials Tools
12 volt rocker switch Wire stripper
16-gauge wire Needle-nose pliers
In-line fuse Electric drill
Fuse holder Utility knife
Ring terminals Soldering iron(optional)

Step 2: Determine the Circuit

The first step in wiring a rocker switch is determining which circuit you want to control. In our example, we’ll be using a rocker switch to turn on and off a LED light strip.

Step 3: Connect the Power Source

Next, we’ll need to connect the power source to the switch. Connect the positive wire from your 12 volt power source to one of the switch’s terminals. You can use a ring terminal to make a secure connection or twist the wire around the terminal and tighten it with a screwdriver.

Step 4: Connect the Load

Now, connect the wire that goes to your device (in our case, the LED light strip) to the other terminal of the switch. Again, you can use a ring terminal or twist the wire around the terminal and tighten it with a screwdriver.

Step 5: Add a Fuse

It’s always a good idea to add a fuse to protect your circuit from overloading or short-circuiting. To add a fuse, simply connect an in-line fuse holder between the power source and the switch. Insert a fuse of the appropriate amperage rating into the fuse holder. The amperage rating should match or exceed the maximum current draw of your device.


Q1. Can I use a rocker switch for a 24-volt system?

A1. Yes, rocker switches are available for a wide range of voltage levels, including 24 volts. Just make sure to select a switch with the appropriate voltage rating for your system.

Q2. How do I know which terminal is which on a rocker switch?

A2. Most rocker switches have markings on the terminals indicating which one is for power and which one is for the load. If your switch doesn’t have markings, refer to the manufacturer’s instructions or use a multimeter to test the continuity between the terminals.

Q3. Can I use a rocker switch to control multiple devices?

A3. Yes, you can use a DPDT rocker switch to control two separate devices with one switch. Connect the power source to the center terminals and the devices to the left and right terminals. Use the switch to toggle between the two devices.

Q4. Can I use a rocker switch to dim a light?

A4. No, rocker switches are not designed to dim lights. For that, you’ll need a dimmer switch specifically designed for the purpose.

Q5. Do I need to solder the connections?

A5. It’s not necessary to solder the connections, but it can help ensure a more secure and stable connection. If you choose to solder, use a soldering iron and heat-shrink tubing to protect the connection.


Wiring a 12 volt rocker switch is a simple task that can be completed with just a few basic tools. By following the steps outlined in this article, you should be able to wire a rocker switch for your next project with ease. Always take precautions when working with electricity and make sure to add fuses and other safety devices as needed to protect your circuits and devices.