Nilight Nylon 14 AWG LED Light Bar Wiring Harness Kit - 1-Lead with Relay, Inline Fuse & Illuminated 5-Pin Switch

Nilight's 14 AWG nylon wiring harness kit supplies a ready-made, heavy-duty electrical connection for 12V LED light bars with a relay, inline fuse, and illuminated 5-pin rocker switch.

This plug-and-play harness is designed to simplify installing auxiliary LED lighting on vehicles and marine craft. Built with 14 AWG stranded conductors inside a heat-resistant nylon jacket, the kit combines protection and flexibility to handle typical light bar loads. It includes a power relay, blade fuse, spade connectors, clear instructions, and a five-pin switch with built-in LEDs so you can mount, wire, and operate your light bar with confidence.

How does this harness protect my LED light bar and vehicle wiring?

The kit adds electrical safeguards to prevent damage from overcurrent and shorts. A dedicated relay isolates the vehicle’s factory wiring from the high current draw of the light bar, while the inline blade fuse provides primary overcurrent protection.

• 14 AWG stranded wire rated for up to roughly 300 W loads under normal conditions
• Power relay prevents high current from running through dash wires
• Inline blade fuse, with spare fuses included in the package
• Spade connectors for secure, low-resistance terminations

What features does the illuminated 5-pin rocker switch offer?

Nilight’s switch is a simple SPST rocker with two small LEDs to make it visible at night and to help indicate switch status. It’s compact, straightforward to mount, and wired into the harness for a neat, factory-like installation.

• SPST functionality for easy on/off control
• Built-in LEDs provide soft illumination for locating the switch in the dark
• Durable housing designed for panel mounting and repeated use
• Wiring pre-terminated to match the harness for faster setup

Is the harness durable enough for off-road and marine use?

The harness uses a nylon-jacketed construction to withstand abrasion, heat, and bending as encountered in off-road and marine installations. Connectors and wiring are selected for flexibility and repeated vibration resistance.

• High-quality nylon outer jacket resists heat and wear
• Stranded 14 AWG conductors for bend-friendly routing through tight spaces
• Suitable for vehicles, ATVs, UTVs, RVs, boats, and trailers
• Included instructions reduce risk of incorrect wiring during installation

What comes in the box and how will it speed up installation?

The kit includes everything needed to wire a single LED light bar so you can avoid sourcing parts separately. Pre-terminated ends and a clear parts list let you complete the job faster and with fewer trips to the parts store.

• 1 wiring harness with 14 AWG stranded wire and relay
• 1 illuminated 5-pin LED rocker switch ready for panel mounting
• Blade fuses, spade connectors, and an instruction sheet
• All hardware packaged for out-of-the-box wiring and testing

Who is this for? If you need a reliable, off-the-shelf wiring solution for a single 12V LED light bar—whether you’re upgrading a truck, installing auxiliary lighting on an ATV, adding deck lights to a boat, or fitting a camper—the Nilight 14 AWG nylon wiring harness kit streamlines the job. It’s suitable for DIYers and professional installers who want a compact, protected, and easy-to-route harness that reduces installation time and helps safeguard both lighting equipment and vehicle wiring.