NR NIRIDER 2-Lead 12V 40A Wiring Harness Kit — Black Nylon, Relay, Fuse & Illuminated Rocker Switch

NR NIRIDER 2-lead 12V 40A nylon wiring harness is a complete plug-and-play kit built to power and protect up to two auxiliary LED lights (maximum 400W total) with a sealed relay, fuse and illuminated rocker switch.

This harness is engineered for drivers and riders who want a tidy, reliable way to add fog lights, LED light bars, driving lights or work lights to trucks, UTVs, ATVs, boats and other 12V systems. The heavy-duty nylon-jacketed wiring, a 40A plug-in relay and an ATO-style 30A fuse give a combination of protection, longevity and ease of installation. Everything arrives pre-terminated so you can route the cables, secure the relay and connect the switch with minimal cutting or splicing.

How does this harness keep my lights protected?

The kit uses a plug-in 40A relay to isolate the high-current load from the vehicle's switch circuit, preventing switch overheating and wiring stress. A sealed ATO-style fuse with rubber cap guards against short circuits and overcurrent conditions while the relay's 4-pole construction improves reliability in wet environments.

• 40A plug-in relay reduces switch current and protects vehicle wiring
• ATO 30A fuse in sealed holder for quick replacement and moisture resistance
• Nylon-jacketed wires for heat dissipation and abrasion resistance
• Waterproof design components to reduce corrosion risk

How easy is it to install on a truck or UTV?

Installation is straightforward: route the pre-crimped wires to each light, mount the relay and fuse near the battery, and install the illuminated rocker switch in a dash opening. The kit includes male/female insulated connectors and heat-shrink tubing so you can make secure, professional-looking connections without specialty tools.

• 14.7 ft total cable length provides ample reach for most vehicle layouts
• Pre-terminated connectors minimize cutting and soldering
• Included switch, relay, fuse and mounting hardware for one-stop installation
• Simple wiring diagram and plug-style relay speed up setup time

What lights and loads will this wiring harness support?

This 2-lead harness is rated to run two LED fixtures up to a combined 400W at 12V (roughly 33A continuous). It's designed for LED light bars, pods, fog lamps and work lights used in offroad or work applications; however, confirm the combined current draw of your fixtures before installing to avoid overloading.

• Supports up to two lights with a combined power up to 400W (12V system)
• Best suited for LED light bars, LED pods, fog lights and auxiliary driving lamps
• Not intended for continuous high-current accessories beyond the 40A relay rating
• Use appropriate relays/fuses if exceeding the kit's max specifications

How durable is the harness in wet or rough environments?

The wiring uses a high-tensile nylon jacket to resist abrasion, flexing and heat, extending service life compared with bare wire. Sealed fuse holder, heat-resistant components and a tested rocker switch add layers of defense against moisture, vibration and repeated use.

• Nylon-sheathed cabling for better wear resistance and cleaner installation look
• Heat-resistant components reduce risk of deformation under load
• Relay and fuse sealed against splashes and light moisture exposure
• Rocker switch tested for repeated cycles to ensure lasting performance

Who this kit is for: NR NIRIDER's 2-lead 12V 40A nylon wiring harness is aimed at DIYers, mechanics and fleet operators who want a reliable, neat electrical solution for auxiliary LED lighting on trucks, SUVs, ATVs, UTVs and boats. If you need a tidy installation, solid protection for your vehicle's electrical system, and enough cable length to reach lights across common vehicle layouts, this kit supplies the essentials with a professional finish. If your setup draws more than the rated 40A relay or you plan to power non-LED high-current accessories, choose a harness with a higher-rated relay and fuse.