December 11, 2025 7 min read

In today’s automotive world, vehicles are more electrically complex than ever before. From infotainment systems and GPS trackers to dash cams and auxiliary lighting, adding new electronics to your car often requires tapping into your vehicle’s fuse box. But doing this incorrectly can damage circuits or void warranties. That’s where fuse taps come into play, a simple yet essential solution for safely adding extra circuits to your car.
In this guide, we’ll explore everything you need to know about fuse taps, including what they are, how they work, how to install them safely, and why they are indispensable for modern car electrical projects.
A fuse tap, also commonly known as an “add-a-circuit fuse,” is a compact and innovative device designed to make adding new electrical accessories to your vehicle both safe and convenient. Traditionally, installing additional electronics, like a dash cam or GPS tracker, required cutting into your vehicle’s wiring harness, splicing wires, or tapping directly into the battery. These methods can be risky, potentially causing short circuits, blown fuses, or even permanent damage to sensitive electronics.Fuse taps solve this problem by providing a simple, plug-and-play solution.
In essence, a fuse tap allows you to draw power from an existing fuse slot in your car’s fuse box while maintaining protection for both the original circuit and your new accessory. This dual protection is one of the main reasons fuse taps have become a preferred tool for automotive enthusiasts, DIYers, and professional installers alike.
A fuse tap works by creating an additional fuse slot above the existing fuse. Here’s how it functions:
• Original Fuse Protection:The lower slot of the fuse tap holds the original fuse for the circuit you’re tapping into. This ensures that your vehicle’s existing electronics remain fully protected.
• New Circuit Fuse:The upper slot holds a separate fuse dedicated to your new accessory. This means that if your accessory experiences an electrical overload, only its fuse will blow, leaving the rest of your car’s systems unaffected.
• Direct Power Connection:The fuse tap comes with a wire terminal where you can connect your new accessory. Power is drawn safely from the original circuit, and the new accessory operates independently with its own fuse protection.
This design not only simplifies installation nbut also maintains the integrity and safety of your vehicle’s electrical system.
Fuse taps are extremely versatile and can be used for a wide variety of aftermarket and auxiliary electronics. Some common applications include:
•Dash Cams:Continuous video recording for security or accident documentation.
• GPS Trackers:Real-time vehicle location tracking for safety or fleet management.
• LED Light Strips: Interior or exterior accent lighting without overloading existing circuits.
• Phone Chargers: Installing extra charging points without running additional wiring.
• Stereo Systems or Amplifiers:Adding audio components safely without interfering with the factory wiring.
By using a fuse tap, you can power multiple accessories without risking your car’s factory-installed circuits, making it a clean, organized, and safe solution for vehicle upgrades.
• No Cutting or Splicing:Keep your car’s factory wiring intact.
• Safe Installation:Reduces the risk of short circuits or electrical overloads.
• Easy to Remove:Can be removed or replaced without leaving permanent modifications.
• Dual Circuit Protection:Ensures both original and new circuits have their own fuses.
•Versatility:Compatible with most modern vehicles and multiple fuse types.
For anyone looking to enhance their vehicle with additional electronics, a reliable fuse tap kit is essential. Witonics offers high-quality options like theMini ATM Add-a-Circuit Fuse Tap, which is compatible with most modern vehicles and ensures both safety and convenience for DIY installations.

Imagine you’re installing a dash cam in your car. Running wires directly to the battery is risky and looks messy. Tapping into a fuse slot is cleaner and safer, but doing it the wrong way can blow fuses, overheat wires, or damage your vehicle’s electronics.
Here’s why automotive fuse taps are a game-changer:
• Preserve Vehicle Safety:Fuse taps maintain the integrity of your car’s electrical system by using the original fuse slot and adding a dedicated fuse for your new accessory.
• Easy Installation:With a fuse tap, there’s no need for complex wiring or cutting factory harnesses. You simply plug the device into the fuse box.
•Protects Original Circuits:A fuse tap allows both the original circuit and the new accessory to have their own fuse, preventing overloads.
• Neat and Reversible:Unlike messy splices, a fuse tap installation can be removed easily, leaving your vehicle wiring intact.
For DIY enthusiasts and professional installers alike, a fuse tap kit is an essential tool. Witonics provides options like theMini Low Profile ATM Add-a-Circuit Fuse Tap, designed for tighter fuse boxes without sacrificing safety.
When choosing a fuse tap, you’ll encounter a few options depending on the type of fuse your vehicle uses and your installation needs. The most common include:
•Mini ATM Add-a-Circuit
The Mini ATM Add-a-Circuit fuse tap is compatible with standard mini fuses, making it perfect for most modern vehicles. It provides a simple and safe way to add new accessories without cutting or splicing wires, keeping your car’s electrical system fully protected.
• Low-Profile Fuse Tap
Designed for tight or cramped fuse box locations, the Low-Profile Fuse Tap fits where traditional fuse taps might not. Its compact design allows easy installation in spaces with limited clearance, making it ideal for modern vehicles with densely packed fuse panels.
• Micro2 or Micro3 Add-a-Circuit
For specialized or ultra-compact fuse boxes found in newer vehicles, the Micro2 and Micro3 Add-a-Circuit options offer a reliable solution. These fuse taps allow you to safely add circuits even in the smallest, most challenging fuse slots, ensuring versatility across a wide range of vehicles.
Selecting the right fuse tap ensures proper fit, safe installation, and reliable electrical protection.
Installing a car fuse tap might seem intimidating, but it’s straightforward if you follow the proper steps.
•Turn Off Your Vehicle:Safety first, always disconnect the ignition and ensure your car is off before touching the fuse box.
•Identify the Fuse Slot: Check your vehicle’s fuse box diagram to locate the fuse that will supply power to your new accessory.
•Insert the Original Fuse:Slide the original fuse into the lower slot of the fuse tap.
•Insert the Add-a-Circuit Fuse:Place a separate fuse for your new accessory into the upper slot of the fuse tap.
•Plug the Tap Into the Fuse Box:Carefully insert the fuse tap into the designated fuse slot.
•Connect Your Accessory:Attach the wire from your accessory to the fuse tap’s wire terminal.
•Test Your Installation:Turn on the ignition and verify that both the original circuit and the new accessory work properly.
For a detailed, step-by-step guide with safety tips, check out Witonics’Installing a Fuse Tap – Add a Fuse Step by Step blog. It’s a helpful resource for first-time users and DIY enthusiasts.
Even though fuse taps are designed for simplicity, beginners often make mistakes that can compromise vehicle safety. Here’s what to watch out for:
•Using Incorrect Fuse Ratings:Always match the fuse amperage to the accessory and original circuit. Using a higher fuse rating can overload wires and cause fire hazards.
•Skipping the Vehicle Manual:Fuse box layouts vary across models. Always consult your vehicle’s manual to ensure you’re using the correct fuse slot.
•Improper Wire Connections: Loose or poorly crimped wires can lead to short circuits. Use proper tools and connectors for secure attachment.
•Ignoring Space Constraints: Fuse boxes can be tight. Low-profile fuse taps help avoid bending or damaging neighboring fuses.
By avoiding these errors, you ensure your fuse tap installation is safe, reliable, and long-lasting.

Investing in a quality fuse tap kit comes with multiple advantages:
• Protects Both Circuits: Dual-fuse design keeps the original circuit protected while powering your new accessory.
• Saves Time:Quick and clean installation without splicing wires.
•DIY Friendly:Even beginners can install automotive fuse taps safely with minimal tools.
• Neat Appearance: No messy wiring; everything stays organized inside the fuse box.
• Reversible:Easily removed if you ever decide to uninstall your accessory.
High-quality kits, like those offered by Witonics, ensure durability, safety, and compatibility with most vehicles.
Q1: What is a fuse tap?
A fuse tap is a device that allows you to draw power from an existing fuse slot while protecting both the original circuit and the new accessory.
Q2: Can I install a fuse tap myself?
Yes! With the right fuse tap kit and basic knowledge, anyone can safely install a fuse tap. Follow step-by-step guides like the one onWitonics Blog.
Q3: Do all cars support fuse taps?
Most modern cars with standard fuse boxes do. Always check your vehicle’s manual and choose a compatible fuse tap type, such as theMini ATM Add-a-Circuit Fuse Tap.
Q4: What’s the difference between a standard fuse tap and a low-profile fuse tap?
A low-profile fuse tap is designed to fit in tight spaces where traditional fuse taps may not fit, ideal for compact fuse boxes.
Q5: Are fuse taps safe for high-powered accessories?
Yes, as long as the fuse rating matches the accessory’s power requirements. For high-demand electronics, always use premium-quality fuse taps like those from Witonics.
Electrical upgrades in cars are no longer a luxury, they’re a necessity for enhanced functionality, safety, and convenience. Whether you’re adding a dash cam, GPS tracker, LED lighting, or other electronics, automotive fuse taps provide a safe, reliable, and clean solution.
Investing in a quality fuse tap kit, likeWitonics Mini ATM Add-a-Circuit orMini Low Profile ATM Add-a-Circuit, ensures that your new circuits are protected and easy to manage.
With proper installation, understanding, and care, fuse taps allow you to expand your vehicle’s electrical capabilities without compromising safety or reliability. Explore the full range of solutions atWitonics and take control of your car’s electrical upgrades today.