Nilight LED Light Bar Wiring Harness 15ft — 2-Lead 16AWG Kit with Relay & On/Off Switch

The Nilight 15ft LED light bar wiring harness kit is a complete 12V plug-and-play wiring solution with two 16AWG output leads, an on/off rocker switch, power relay and blade fuse for safe, reliable off-road and work light installation.

This harness bundles everything you need to power one or two LED light fixtures from a vehicle, boat, or other 12V source while minimizing installation time and maximizing circuit protection. The included 15-foot wiring run gives you flexibility routing the harness from a dash-mounted switch to lights mounted on bumpers, roofs or rear racks. Built for universal fit and straightforward connections, the kit is designed to simplify wiring for auxiliary lighting projects without modifying your vehicle's main electrical system.

How does the 15ft length help with installation?

The generous 15-foot main cable provides ample reach between the switch and lighting location so you won’t need repeat extensions for most vehicles. That length lets you route the harness out of sight under trim or along frame rails for a cleaner install.

• 15ft main run from switch to light outputs for flexible routing
• Extra slack for hidden mounting and secure zip-tie points
• Reduces need for additional extension cables

Can I run two lights from this harness, and what are the limits?

Yes — the harness provides two separate output leads so you can power a pair of LED fixtures. The combined load rating supports lighting setups up to the harness’s specified wattage (check your light bars’ wattage), with the 16AWG wiring optimized for common auxiliary LED loads.

• Two 16AWG output leads for dual light bar connections
• Designed for dual fixtures under the harness’ rated capacity
• Stable connectors reduce voltage drop and secure attachment

What safety features are included to protect my vehicle’s electrical system?

The Nilight harness integrates multiple protective components to reduce risk of damage from overloads or shorts. A dedicated power relay handles high-current switching, while a blade fuse and the on/off rocker switch with indicator light give visual and circuit-level protection.

• Blade fuse to guard against over-current and short circuits
• Power relay separates switch circuit from heavy current flow
• 3-pin rocker switch with red indicator for on/off status

Is this harness compatible with my vehicle or boat?

Yes — the harness is made for universal 12V systems and works with most cars, trucks, SUVs, ATVs, UTVs and marine crafts that use a 12-volt battery. Simple wiring labels and connectors make it straightforward for DIYers and professional installers alike.

• Universal 12V compatibility for automotive and marine use
• Standard connectors that mate with common LED light bar plugs
• Includes instructions to guide a clean, safe install

Who is this for: The Nilight 15ft wiring harness kit is aimed at anyone adding auxiliary LED lighting who wants a compact, protected, and easy-to-route wiring solution. It’s a solid pick for off-road enthusiasts, tradespeople mounting work lights, boat owners upgrading deck or flood lighting, and DIY installers who prefer a plug-and-play harness with built-in relay and fuse protection rather than splicing into factory wiring.