An add a fuse kit is an easy solution for implementing a fuse tap to your vehicle. Whether you’re hardwiring a dash cam, CB radio, radar detector, or any other electronic devices that needs to be directly wired into the fuse box to avoid battery drain, Add-a-Fuse helps.
Why Use Add-a-Fuse Kits?

An Add-a-Fuse kit allows you to tap into your vehicle’s fuse box to supply power to accessory electrical components. This makes it possible to have your dash cam, LED lights, or new radio hardwired without splicing your vehicle’s original wires.
As a quick example, a dash cam can drain your car battery while the vehicle is off if it’s plugged into the cigarette lighter. Hardwiring a dash cam avoids battery drain but in order to hardwire it you may need to add more fuse slots… that’s where adding a circuit helps.
How Add-A-Circuit Works
The beauty of an Add-a-Fuse lies in its design. The dual-slot fuse holder protects existing electrical circuits and the new circuits you’re adding.
Add-a-Fuse comes in four types – Standard, Mini, Low Profile Mini, and Micro2 – each designed to suit different automotive fuse types. Regardless of whether you’re working on factory wiring a car, truck, SUV, or boat, there’s Add-a-Fuse kits for your situation.
How to Setup an Add-A-Fuse Kit

Follow these steps to learn how to implement add a fuse to your car.
- Insert Fuse Tap Wire into Add-a-Fuse
Start by inserting the fuse tap into the “Fuse 1” position of appropriate fuse in the Add-a-Fuse Kit. Your selected fuse from the vehicle’s fuse box slides into the “Fuse 2” position. The amperage rating of your chosen fuse doesn’t need to match the amperage rating of the fuse included in the kit.
- Crimp Add-a-Fuse Kit & Connecting Hardwire Kit
Next, we crimp. Trim off some of the rubber tubing on your hardwiring cable to expose some wire, then connect that cable into the other end of new power wire to the add-a-fuse. Crimp them down together to make the connection. Ensure nothing is loose after crimping with a simple tug on the add-a-fuse.
- Put Add-a-Fuse Back into Fuse Slot
Finally, slide add a fuse back into the fuse socket in the slot from which the original fuse was removed. If you’re working with a traditional hardwire kit, you’ll have to repeat this process for another add a fuse to handle the ignition-switched fuse.

That’s it, you’ve successfully tapped into the power wire of your vehicle’s fuse box and are ready to power your new accessory. An Add-a-Circuit kit brings the power of professional-grade installation to your fingertips.
It provides an efficient and secure way to extend your vehicle’s electrical system without the need for complex wiring or compromising the vehicle’s original circuits. This hands-on guide aims to empower you to harness the full potential of the Add-a-Fuse tap kit.
Remember, no task is too daunting with the right tools and instructions at your disposal. If you ran into any problems while setting up your fuse tap, you’ll benefit by reading these tricks to fix a dead car battery.
FAQ
Add-a-fuse refers to the process of tapping into your vehicle’s existing fuse box to add an extra accessory circuit. It ‘adds’ a fuse to the vehicle’s fuse block slot, creating an additional electrical circuit for powering new devices.
Absolutely, when used correctly, an add-a-fuse is a safe method to add additional circuits to your vehicle. It’s designed to protect both existing and new circuits with separate fuse holders.
In the context of automotive electrical systems, mini fuse tap and ‘add-a-fuse’ kits are often used interchangeably. They both refer to the same device that allows you to tap into an existing fuse slot to power additional electrical components.
Yes, insert the factory fuse tap into the ‘Fuse 1’ position, while the fuse from your vehicle goes into the ‘Fuse 2’ position. This ensures that power is fed correctly to the hardwire kit.
The maximum amperage a fuse tap can handle depends on the fuse you’ve placed in it, but typically, fuse taps can handle fuses up to 30 amps. Always refer to the fuse tap step manufacturer’s guidelines when deciding on the right amperage.
Easiest Way to Add A Circuit
An Add-a-Fuse kit is a powerful tool that brings the benefits of a professional-grade installation into the hands of everyday dash cam owners. The versatility and convenience it offers make it an essential accessory for anyone looking to upgrade their vehicle’s electronic capabilities.
By employing an Add-a-Fuse kit, you can quickly transform an empty fuse socket into a hot socket. Whether it’s installing a dash cam or a radar detector, the process is streamlined & straightforward.
Just locate the appropriate circuit, fuse block & add a circuit with the Add-a-Fuse kit. That’s it, then you can secure the fuse box cover back in place. If a fuse needs to be pulled for installation, it’s a straightforward process, and the kit allows for its reinstallation, keeping the original circuit protected.
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