12V LED Wiring Harness Kit with 40A Relay for Light Bars, Driving Lights & Spot Lights

Power your LED light bars, driving lights or work lamps with a robust, DIY‑friendly wiring loom designed for 12V systems. Engineered for durability and straightforward installation, this kit bundles heavy‑duty wiring, a 40A switching relay, and a replaceable fuse to deliver reliable power while keeping wiring tidy and secure.

Why this harness stands out

• 40A relay capable of powering multiple lights (roughly 10+ driving lights depending on total wattage) without voltage drop, making it ideal for larger light bar setups.
• Up to 2.5 metres of flexible wiring to accommodate a wide range of vehicle layouts and mounting positions.
• New heavy‑duty wiring suitable for HID, halogen, and LED light bars, ensuring compatibility across common 12V lighting options.
• Press‑button on/off switch with adhesive backing for quick, secure mounting anywhere on the dash or pillar.
• Most wires end in spade, plug, or ring fittings for fast, tool‑free connections and clean installations.
• Built‑in 30A blade fuse holder provides built‑in protection and simplifies troubleshooting.
• Comprehensive, all‑in‑one loom that includes relay, fuse, and wiring harness for an organized install.

What’s in the box

• 1 x 12V DC 40A Driving Lights Wiring Loom

Ideal applications

• Off‑road rigs, trucks, SUVs, ATVs, and work vehicles needing reliable, easily wired lighting upgrades.
• Pre‑wiring and retrofitting light bars, spot lights, driving lights, or work lamps with a single, tidy harness.
• DIY installations where quick mounting, protected power, and straightforward wiring are priorities.

Specifications at a glance

• Wiring loom: 12V DC, 40A rated
• Switch: Press‑button on/off with adhesive backing
• Relay: 12V DC, 40A switching relay
• Fuse: Blade fuse holder with 30A fuse
• Length: Up to 2.5 metres of wiring
• Terminals: Ends on most wires ready for quick fitment