2 Packs 12v Fuse Relay Switch Harness Set with 30a Ato Atc Blade Fuse, 4-Pin Spst Automotive Electrical Relays with Heavy Duty 12 Awg Wires for Car Truck Boat Vehicle, Interlocking Mount

Price: £7.99 - £8.98
(as of Sep 28, 2025 02:38:20 UTC – Details)


Simple Color-Coded Wiring for Quick Installation
Each 12v fuse relay switch harness set comes pre-wired with color-coded 12 AWG heavy-duty wires for easy identification: black (ground/85), red (power/30), white (trigger/86), and blue (output/87). No guesswork—just connect and go. 12v fuse relay harness Designed for hassle-free wiring, even for DIY users.
Built-In 30A Fuse for Enhanced Protection
Includes integrated 30A ATO/ATC 12v car relay harness within the relay socket—no need for a separate fuse holder. 12v automotive relay harness Simplifies your automotive wiring setup and ensures reliable overcurrent protection for your circuits. Saves space, time, and reduces wiring complexity.
High Compatibility with Automotive Accessories
12v 30amp 4 pin relay fused harness Ideal for use in controlling headlights, fog lights, starter motors, cooling fans, horns, wipers, and more. Whether for cars, trucks, RVs, boats, or ATVs, these automotive relays support a wide range of 12V DC applications with dependable switching power.
Reliable 12V 30A SPST Relay with Mounting Bracket
Features a 4-pin SPST (single pole single throw) relay rated at 12V DC (max 14V) and 30A switching capacity. Each 12v 30a 4 pin relay harness includes a durable metal mounting bracket for secure and convenient installation in your vehicle.
Heavy-Duty and Built to Last
Waterproof relay harness 12v 4pin Crafted with high-strength materials and sealed construction, these 12v fuse relay switch harness set are built to withstand tough automotive environments. Designed for long-term durability and performance under high current loads, even in heat, moisture, and vibration-prone conditions.
Colour-marked cables for one-step wiring: Each 4 pin relay 12v 30a wire is clearly marked with colour to make installation more intuitive: black to ground (85), red to power (30), white to contact signal (86), blue to output (87). 12v 30a relay 4 pin Equipped with thicker 12 AWG heavy-duty wires to ensure stable and reliable connection of high-current loads, 12v fused relay harness no need to double-check, easy to complete the wiring
Built-in fuse design: 12v waterproof relay harness Integrated 30A ATO/ATC blade fuse in the relay socket, eliminating the need for a separate fuse holder, 12v relay fuse harness simplifying the automotive wiring process, saving time and cost, while reducing the number of failure points and improving the overall safety and stability of the electrical system
Wide range of automotive electrical systems: 12v fuse relay switch harness set Suitable for controlling automotive headlights, fog lights, wipers, fans, audio, starter systems, traction control devices, etc. Relay harness 12v 4 pin Wide compatibility, fused relay 12v can be used in cars, trucks, off-road vehicles, RVs and other vehicles, 4 pin relay 12v wiring loom with switch is the ideal accessory for automotive circuit modification and repair
Easy to install and durable: 4 pin 12v 30a relay harness Adopts standard 4-pin SPST relay structure, supporting 12V DC (up to 14V) voltage and up to 30A switching load capacity. Each 30 amp relay 12v comes with a metal mounting bracket for easy and secure fixing in the right place in the car, quick and effortless installation
Durable construction: The 12v dc 30amp relay harness housing is encapsulated with high-strength materials, 12v spst relay fused harness adapting to complex use environments such as high temperature, high humidity and high loads. Whether 12v relay harness with holder is daily driving or electrical operation under extreme conditions, 12v relay holder harness can provide continuous and stable performance and extend the service life of the vehicle system