7-Way Blade Plug Wiring Diagram

🔌Understanding the 7-Way Blade Plug Wiring Diagram

The 7-way blade plug is one of the most common connectors used for towing trailers with electric brakes and additional features like reverse lights and battery charging. Whether you’re installing a new connector or replacing a worn-out one, having a clear 7-way blade plug wiring diagram ensures safe, accurate hookups every time.

This plug style features seven pins, each responsible for a specific electrical function. Proper wiring keeps your trailer lights working, your brakes responsive, and your trip worry-free. It’s essential for hauling RVs, livestock trailers, utility trailers, and more.

Here’s a quick breakdown of standard wire colors and what they control:

• Brown – Tail and running lights

• Yellow – Left turn signal and brake

• Green – Right turn signal and brake

• White – Ground

• Blue – Electric brake controller output

• Black – 12V battery auxiliary power

• Purple – Reverse lights

📌The diagram above shows both outside and inside pin layouts. Reference it during your installation or troubleshooting process for quick guidance. Proper installation not only improves safety, but also extends the life of your trailer’s electrical components.

At Dukes A&W, we carry a wide range of trailer wiring accessories, plugs, harnesses, and brake controllers, everything you need for a safe towing setup. If you have questions about wiring or want professional help, don’t hesitate to contact our shop. We proudly serve customers across Kentucky and Southern Indiana with expert support and reliable parts.

For additional details and standards used across the industry, check out this in-depth guide from eTrailer, a trusted resource for plug configurations and wiring best practices.

No matter what you’re towing, a properly wired 7-way blade plug is critical to safety and compliance. Let this diagram and guide help you wire it right the first time.