Ryukiro 7-Way Trailer Wire Harness 14 AWG 7‑Pin 25 ft — PVC Jacket, SAE Color-Coded

Ryukiro's 7 Way Trailer Wire Harness is a 25-foot, 14-gauge, 7-pin trailer wiring kit built for reliable 12V trailer connections and long-lasting outdoor use.

This 7-pin harness by Ryukiro provides a complete hook-up cable for trailers, RVs, and utility vehicles that need standard SAE wiring colors and sturdy protection against road and weather exposure. The cable's 14-gauge conductors and automotive-grade PVC jacket resist oil and gasoline and operate across a wide temperature range, giving installers a simple, standardized solution for lighting, brakes, and auxiliary circuits.

How does this harness connect to my trailer and tow vehicle?

The harness includes seven individually colored wires that match SAE wiring conventions for easy identification and connection. Each conductor is terminated to support standard 7-pin trailer plugs and sockets, reducing guesswork during installation.

• Seven color-coded wires: green, yellow, white, brown, blue, black, red for fast identification
• 14 AWG gauge suitable for lighting circuits and common accessories
• 25-foot length for flexible routing along frames and through enclosures

Will this cable withstand road exposure and temperature changes?

Ryukiro designed the outer jacket with automotive-grade PVC to protect conductors from fuel, oil, and physical wear. The specified operating range covers sub-freezing starts to hot climates, so the harness maintains performance in a variety of conditions.

• Oil- and gasoline-resistant PVC jacket for roadside durability
• Temperature tolerance from -5°F to 185°F to handle most climates
• Robust insulation reduces cracking and abrasion from vibration and movement

What electrical functions does the 7-pin wiring support?

This 7-way harness carries the standard trailer circuits used by most trailers and tow vehicles, enabling brake lights, turn signals, tail lights, ground, auxiliary power, and electric brakes where equipped. Proper use ensures each function has a dedicated conductor for stable operation.

• Dedicated conductors for left/right turn, tail/marker lights, and brake lights
• Auxiliary and brake circuit support via the blue and red/black wires depending on system wiring
• Standard SAE color coding simplifies matching to vehicle-side connectors

How easy is it to install this 25-foot harness?

The pre-measured 25-foot length gives installers room to run the cable along the trailer frame and route into junction boxes or inside the tongue compartment. Because the wires are color-matched to SAE standards, you can quickly identify and attach each conductor to existing connectors or terminal blocks.

• 25-foot continuous length reduces need for splicing in most installations
• Color-matched wires speed up hookups and reduce wiring errors
• Compatible with common 7-pin plugs and trailer panel sockets

Who is this for? Ryukiro's 7 Way Trailer Wire Harness is aimed at DIY mechanics, fleet maintenance crews, and trailer builders who want a standardized, heavy-duty wiring solution. If you work on utility trailers, horse trailers, campers, or light commercial equipment and need a long, durable 7-pin cable that follows SAE color conventions, this kit delivers the conductors and protective jacket needed for dependable trailer electrical connections.