Nilight Rear Lights Wiring Harness Kit — 16 AWG 2‑Lead Nylon Jacket, 5‑Pin Switch & Relay, 180W Capacity

This wiring harness is designed to simplify electrical installs for auxiliary rear lights on cars, trucks, trailers, ATVs, UTVs and marine craft. It combines thicker 16 AWG stranded conductors with a protective relay and an inline blade fuse to safeguard your circuit, while a nylon jacket improves abrasion and heat resistance. The kit includes two light outputs so you can run dual fixtures from a single switch loop.

How does this harness protect my vehicle's electrical system?

The Nilight kit routes power through a dedicated relay and an inline blade fuse so the vehicle's factory switch and wiring aren't overloaded. Using a relay means the heavy current goes straight from the battery to the lights, and the fuse blows first if there is a short or overcurrent.

• Power relay handles switching of high current loads
• Inline blade fuse provides first-line overcurrent protection
• 16 AWG stranded wire reduces voltage drop for up to 180W load
• Nylon jacket resists abrasion and high temperatures

What components are included and how is the switch configured?

The kit comes with a Nilight 5‑pin on/off rocker switch featuring an SPST (single pole, single throw) layout for straightforward operation. The switch has two built‑in LED indicators so it’s easy to locate in low light and know when the circuit is active.

• Nilight 5‑pin rocker switch with SPST design
• Two soft LED indicators on the switch for visibility
• Pre‑wired connector leads for quick plug‑and‑play hookup
• Mounting hardware and relay socket for tidy installs

Will this wiring harness work with my lights and vehicle?

The harness is built for 12V systems and supports up to 180W across the two output leads, which makes it compatible with most aftermarket rear light setups. It’s suitable for automotive, off‑road, marine and recreation vehicles where a dedicated protected feed and switch are required.

• Rated for 12V battery systems (cars, trucks, RVs, ATVs, UTVs, boats)
• Two output leads let you connect dual lights or light bars
• 180W total load capacity when using both leads
• 16 AWG wire balances flexibility with current capacity

How easy is installation and what should I prepare?

The harness is intended for straightforward installation by anyone comfortable with basic vehicle wiring. The pre‑terminated connectors, relay socket and switch cutout simplify the process; still, you’ll want basic tools, a secure battery connection and possibly silicone sealer for marine installs.

• Pre‑wired connectors reduce crimping and soldering work
• Relay and fuse already integrated—minimizes wiring steps
• Switch requires a standard dashboard cutout for mounting
• Recommended tools: wire crimper, fuse puller, multimeter

Who is this for: Installers, DIY vehicle owners and fleet maintainers who need a reliable, protected way to power rear auxiliary lighting. If you want a compact harness that keeps high current off factory switches, offers two light outputs, and uses rugged nylon‑sheathed 16 AWG wiring for durability and safety, this Nilight kit is built for that use case.