MECMO 7-Way Blade to 4-Flat Trailer Adapter — 5ft Coiled Wiring Harness, 18AWG Copper, Dust Cover

MECMO's coiled 7-way blade to 4-way flat trailer adapter is a durable, 5-foot expandable wiring harness that converts a vehicle's 7-pin blade outlet into a standard 4-prong flat trailer plug for reliable trailer lighting connections.

This compact, retractable cable saves hassle when hooking up a trailer to vehicles with mismatched connectors. Built from flexible PU jacket material, 18AWG copper conductors and tin-plated terminals, the adapter resists corrosion and rebounds when released. Its coiled design keeps wiring off the road, while the integrated dust cover and easy-grip handles simplify connection and storage.

How does this adapter make towing simpler?

Instead of swapping multiple connectors or rewiring, this adapter instantly converts the towing vehicle's 7-pin blade outlet to a 4-pin flat trailer plug. Plug-and-play construction eliminates tools and complex installation steps.

• Converts 7-way blade to 4-way flat in one cable
• Plug-and-play—no splicing or extra adapters needed
• Coiled length extends up to about 5 feet for flexible reach
• Dust cover protects unused socket from moisture

Will the cable hold up to outdoor use and towing conditions?

The harness is constructed with a flexible PU outer jacket, pure copper conductors and tin-plated terminals that resist oxidation. These materials are chosen to tolerate bending, stretching and exposure common to towing tasks.

• PU jacket resists cracking and deformation
• 18AWG copper conductors for stable signal and power
• Tin-plated terminals reduce corrosion over time
• Coiled design reduces scraping and abrasion on the road

How long is the cable when stretched and how does the coil help?

When fully extended the cable reaches roughly 60 inches (about 5 feet), while normal comfortable stretches fall between 3 and 4 feet. The coiled form retracts after use so excess cable stays compact and out of harm's way.

• Maximum stretch approximately 60 inches (5 feet)
• Comfortable working length commonly 3–4 feet during towing
• Automatic rebound keeps slack off the ground and improves safety
• Coil reduces likelihood of tangles and ground abrasion

What features make it easy to connect and store?

Ergonomic grips on both the 7-way blade plug and the 4-pin flat socket make plugging and unplugging straightforward, even with gloves. A built-in dust cap protects the female 4-pin socket, and the coiled cable stores compactly when not in use.

• Easy-grip handles for fast connection and removal
• Protective dust cover for the female 4-pin socket
• Compact coiled profile reduces storage space needed
• Designed for quick, tool-free setup

Who this is for: This MECMO adapter is ideal for boaters, RV owners, landscapers, small haulers and anyone who needs a dependable, no-fuss way to connect a 4-prong trailer to a vehicle with a 7-pin blade socket. It suits users who want a tidy, weather-resistant solution that avoids extra adapters and minimizes exposed wiring while towing.