Nilight LED Light Bar Extension Kit 2-Pack 12 AWG 10ft — Waterproof, High-Temp Wiring Harness

Nilight’s 2-piece 12 AWG, 10-foot wiring harness extension kit lets you safely extend LED light bar wiring for vehicles and marine use without splicing or custom cabling.

Whether relocating an LED light bar, installing auxiliary work lights, or routing power through a vehicle’s firewall, a properly rated extension keeps connections secure and simplifies installation. This Nilight kit uses flexible 12 AWG stranded copper conductors inside heat-resistant PVC and rubber jacketing, with waterproof connectors and plug-and-play ends so you can extend factory or aftermarket harnesses up to ten feet per cable. The pair of cables provides room for different mounting layouts and helps route power and ground neatly to switches, relays, and lights.

How durable and weatherproof is this extension kit?

The Nilight extensions are built with 12 AWG flexible stranded copper wire and a rubber-protected PVC outer tube rated to resist high temperatures up to 105°C. Sealed connector housings and corrosion-resistant terminals improve long-term exposure resistance for exterior mounting.

• 12 AWG stranded copper for better current capacity and flexibility
• High-temperature PVC insulation and rubber protection
• Waterproof connectors suitable for exposed locations
• Designed to resist salt, dirt, and road spray in automotive and marine settings

Will 10 feet of cable be enough for my installation?

Ten feet per harness gives most installations ample reach to route wiring from a light bar to a switch or relay mount inside the cabin or engine bay. The kit includes two 10-foot cables so you can run separate power and ground runs or extend two different light locations without cutting cable.

• Each cable is 10 feet long—long enough for roof, bumper, or rear deck lights
• Two cables allow power and ground separation or dual-light setups
• Plug-and-play ends reduce the need for splicing or additional connectors
• Extra slack simplifies routing around frame rails and through grommets

How easy is installation and which vehicles does it fit?

Installation is straightforward: the harnesses are designed for plug-and-play with many common light bar harness systems and include a simple instruction sheet. They’re compatible with nearly any 12V electrical system found on cars, trucks, SUVs, ATVs, UTVs, motorcycles, boats and trailers.

• Play-and-plug connectors for quick attachment to existing harnesses
• Works with most 12V light bar and auxiliary light wiring kits
• Suitable for passenger vehicles, off-road rigs, marine craft and powersports
• Minimal tools required—route, plug, and secure with clamps or ties

What safety and performance considerations should I follow?

Using appropriately gauged wire prevents overheating and voltage drop on high-draw LED arrays. Keep connectors dry, secure the run to avoid chafing, and follow relay/switch wiring best practices for safe, reliable operation.

• 12 AWG supports higher currents with lower voltage drop than smaller gauges
• Secure wiring with clamps and grommets to prevent abrasion
• Use a dedicated relay and fuse sized to the light’s draw for protection
• Inspect connectors periodically for corrosion or looseness

Who is this for: This Nilight 10-foot, 12 AWG wiring harness extension kit is tailored for DIY installers, mechanics, off-road enthusiasts, and marine users who need reliable, weather-resistant cable to relocate or expand LED lighting systems. If you want an easy, code-compliant way to extend power and ground runs without fabricating custom cable, this kit gives two robust, long-length extensions that simplify routing and reduce installation time.