Description
CTC Customs LED Fuse Box, 4-way to 8-way – Smart, Safe & Easy Diagnostics
Take control of your vehicle’s electrical system with the CTC Customs Fuse Box (4-way to 8-way), designed for reliability, safety, and ease of use. This high-quality fuse box features integrated LED indicators that light up instantly when a fuse is blown — eliminating the need for time-consuming testing or guesswork.
Build your own fuse box
Nowhere else can you put together your own fuse box – at CTC Customs you can. Choose the number of fuse ways and combine one or more busbars, exactly the way your wiring needs it.
See a blown fuse at a glance
Every fuse has its own LED. When a fuse blows, the LED lights up the fuse itself (with the consumer connected and switched on) – just look at the fuse box: the fuse that glows is the one that is blown. No test light, no multimeter and no pulling fuses one by one, so it saves a lot of diagnosis time.
Note: only replace the fuse once the cause, such as a short circuit, has been fixed.
You choose the feed side
The power supply and the consumers can be connected on either side of the fuse box. You decide which side is the power feed and which side goes to the consumers, so it always fits your wiring layout.
Built with durable mini fuse holders and secure M5 screw terminals, it ensures strong and stable wire connections for any custom wiring project.
Perfect for use in:
Cars & trucks
Campers & RVs
Boats & marine applications
Off-grid and custom electrical setups
Key Features:
Designed for 12V systems
Integrated LED indicator for each fuse – instantly shows when a fuse is blown
High-quality mini fuse holders ensure long-lasting performance
Choose which side is the power feed and which side goes to the consumers
M5 screw terminals for secure and easy wire connections
Supports 4 to 8 circuits, depending on the version (high quality fuses available as an option)
Compact, reliable, and easy to install
Available Versions:
4-way, 5-way, 6-way and 8-way
Options with individual bridges or multiple power inputs for custom setups
Supply cable with a wide ring terminal (e.g. 10 mm²)
Ring terminals wider than 10.5 mm do not fit between the separating ridges. In that case, file down the two ridges next to the supply bolt on the busbar side only: approx. 0.7 mm per side, up to approx. 5 mm above the PCB.
Never file the ridges on the output side. They keep the ring terminals of different circuits from touching each other.
Whether you’re rewiring a classic car, building a camper van, or upgrading your boat’s electrical system, the CTC Customs fuse boxes offer the smart solution for safe and simple power distribution.
Not sure which wire sizes to use? Check the CTC Customs 12V Wire Calculator.

