Fastchoy Auto 12V 2-Lead Nylon Wiring Harness Kit — 40A Relay, 30A Waterproof Fuse for Dual LED Light Bars & Pods

This kit is a complete plug-and-play wiring solution built to run two 12V LED light accessories — such as light bars, pods, fog lights, or rock lights — while protecting your vehicle’s electrical system. The harness includes 14.7 feet of wire, a 40A relay, a 30A fuse in a waterproof housing, a 3-pin illuminated rocker switch, insulated connectors and heat-shrink tubing for clean, reliable installs. Materials and connectors are chosen to resist heat, abrasion, water and corrosion, making the harness suitable for trucks, UTVs, ATVs, boats and other 12V systems.

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

The Fastchoy Auto kit isolates high current through a dedicated 40A relay and inline fuse, so heavy LED loads don’t pass through the vehicle’s switch circuits. The 30A fuse stops overloads and the waterproof fuse block keeps the protective element safe from moisture and dirt. Overall, the harness reduces wiring stress and lowers the chance of shorts or melted insulation.

• 40A relay routes high current away from dashboard wiring
• 30A fuse provides overload protection in a sealed housing
• Nylon-jacketed wire resists heat, abrasion and cracking
• Fully insulated connectors and heat-shrink tubing for secure joins

Will this wiring harness fit my light bar or LED pods?

The harness supports up to 300 watts total at 12V, making it compatible with most single or paired light configurations within that power range. It’s intended for 1" to 54" LED light bars and most common fog lights, driving lights, backup lights and pods. Mounting and connector compatibility is simplified with included male and female insulated terminals that work with standard 12V lamp leads.

• Rated for up to 300W load capacity at 12V
• Designed for 1"–54" LED light bars and common LED pods
• Includes universal male/female insulated connectors for standard lamp leads
• 14.7 ft harness length reaches typical mounting positions in trucks and UTVs

How difficult is installation and what’s in the box?

Installation is straightforward for anyone familiar with basic automotive wiring: route the harness, connect the power to the battery through the inline fuse, attach the relay and switch, then crimp or solder the provided connectors. The illuminated rocker switch helps you see activation in low light. The kit supplies everything needed for a tidy, long-lasting install without hunting down extra parts.

• Included: 14.7 ft 2-lead nylon harness, 3-pin illuminated rocker switch
• Included: 40A relay, 30A fuse in waterproof housing
• Included: male and female insulated connectors, heat-shrink tubes
• No additional relays or fuses required for standard installs

Who is this for? The Fastchoy Auto 2-lead wiring harness is aimed at vehicle owners, installers and DIYers who want a reliable, weather-resistant wiring solution for powering two LED accessories from a 12V source. It’s a practical choice for truck and SUV owners adding a light bar, off-road enthusiasts fitting pods on UTVs/ATVs, boat owners needing sealed fuse protection, and anyone who needs a clean, safe upgrade without fabricating custom wiring. If you need a durable harness that balances ease of installation with robust current protection, this kit delivers the core components to get your lights wired and working safely.