Nilight LED Light Bar Wiring Harness Kit — 2-Lead 12AWG, 10ft Dual Output with Relay, Blade Fuse & Illuminated Switch

Nilight's LED Light Bar Wiring Harness Kit is a complete 12V, 12AWG dual-lead wiring solution with a relay, inline blade fuse and illuminated on/off rocker switch designed to safely power two off-road LED fixtures up to 450W combined.

If you’re installing auxiliary LED light bars on a jeep, ATV, UTV, truck or boat, this harness gives a tidy, protected electrical path from your battery to the lights and a dashboard-mounted switch. Built with heavy-gauge 12AWG wire, a rated power relay and inline blade fuse, the kit simplifies wiring while reducing voltage drop and protecting your vehicle’s electrical system from overloads and shorts. The harness arrives pre-terminated and about 10 feet long for flexible routing, and includes clear instructions for a faster, cleaner install.

How does the dual-lead design make installation easier?

The harness has two separate output leads so you can run two light bars or pair a light bar with other 12V fixtures without splicing. That layout keeps each load on its own connector and prevents overloading a single output.

• Two output connectors for dual fixtures under 450W total
• Pre-crimped terminals for quicker hookups
• Separate leads reduce potential hot spots and simplify routing

What protection does the kit provide for vehicle electronics?

Protection is built in with a power relay that handles switching current away from the dash circuit and an inline blade fuse that interrupts fault currents. These components act as the first line of defense if a short-circuit or overcurrent occurs.

• 12V-rated power relay for safe high-current switching
• Inline blade fuse to prevent sustained overcurrent damage
• Heavy 12AWG wiring minimizes heat and voltage loss under load

How does the illuminated rocker switch perform in daily use?

The kit uses a 3-pin illuminated on/off rocker switch with a visible red indicator when the circuit is active, making it easy to confirm operation at a glance. The switch is rated for frequent use and ergonomically shaped for quick reach while driving.

• Red indicator light shows when lights are on
• 3-pin design for reliable signal and power routing
• Tested to 5,000 actuations for long-term durability

Will this harness work with my vehicle and lights?

The harness is intended for 12V systems found in most consumer and recreational vehicles. It's compatible with many LED light bars and work lights, provided the combined load of connected lights does not exceed the kit's 450W limit.

• Designed for 12V batteries in cars, trucks, ATVs, UTVs, motorcycles, boats and trailers
• 10-foot main length for flexible mounting and routing options
• Works with most aftermarket 12V LED fixtures within the power rating

Who is this for? The Nilight LED Light Bar Wiring Harness Kit suits DIYers, installers and vehicle owners who want a safer, neater way to add auxiliary LED lighting. It’s especially useful for off-road enthusiasts, tow/utility vehicle drivers and small-boat owners who need a robust, protected connection and an easy-to-see switch. If you need a ready-made, heavy-gauge harness with protection components and a clear install path, this kit streamlines the work and reduces wiring error risk.