Trailer-&-Towing-Accessories > Towing-Electrical > Trailer-Wire-Connections > Trailer-Plug-Adapters

7-Way RV Blade to 4-Way Flat Trailer Plug Adapter

7 RV/Blade to 4 Pin Trailer Plug Adapter

7-Way RV Blade to 4-Way Flat Trailer Plug Adapter: Durable and Easy Towing Connection

The 7-Way RV Blade to 4-Way Flat Trailer Plug Adapter makes it simple to connect a 7-way RV blade-style trailer socket to a 4-way flat molded trailer connector. This one-piece molded adapter ensures a seamless, hassle-free conversion, making it ideal for towing applications that require reliable compatibility.

Crafted from corrosion-resistant nylon material, this adapter is built to withstand the rigors of frequent use and harsh environments. Its innovative design offers durability and efficiency, making it a dependable choice for connecting sockets and molded connectors with ease.


  • Innovatively designed one-piece molded adapter.
  • Manufactured from Nylon material to resist corrosion.
Item Description Price
1+ I Ext. Price I 50+ Ext. Price I I 100+ Ext. Price I
Qty in
Package 		In Stock Add to Cart
73012 Trailer Adapter, 7-Way RV Blade Style to 4-Way Flat Molded Connector (1 MIN)
12.13 12.13 I 10.72300 10.72 I 8.77700 8.78
1 EA ✓

CURT LED Electrical Adapter (7-Way RV Blade Vehicle to 4 or 5-Way Flat Trailer)

CURT LED Electrical Adapter 7-Way RV Blade Vehicle to 4 or 5-Way Flat Trailer

CURT LED Electrical Adapter (7-Way RV Blade Vehicle to 4 or 5-Way Flat Trailer): Reliable and Versatile Towing Solution

The CURT LED Electrical Adapter effortlessly converts a 7-way RV blade vehicle socket into a 4-way or 5-way flat trailer connector, providing a versatile solution for diverse towing needs. Designed with a plug-and-play system, it eliminates the hassle of cutting or splicing wires for a simple, user-friendly installation.

This adapter features built-in LED lights that verify the connection and confirm proper functioning of the vehicle-side wiring, ensuring safe and reliable trailer operation. Constructed with durable materials, it is designed to withstand the elements and frequent use, making it an essential tool for towing trailers, boats, and other vehicles with varying connector types.


  • Adapts a 7-way RV blade vehicle socket to fit 4-way or 5-way flat trailer plugs
  • Enables vehicles with a 7-way RV blade socket to recognize LED trailer lights
  • Built-in, integrated resistors for computers that don't recognize LED lights
  • 4-way flat output connects tail lights, brake lights and turn signals
  • 5-way flat adds connection for reverse lights
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • All CURT items have a 15% restocking fee
Item Description Price Qty in
Package 		In Stock Add to Cart
CURT57004 CURT 57004, LED-Compatible 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer-Side Trailer Wiring Adapter (1 MIN) 19.97 1 EA Call

CURT Electrical Adapter (7-Way RV Blade Vehicle to 4-Way Flat Trailer)

CURT Electrical Adapter 7-Way RV Blade Vehicle to 4-Way Flat Trailer

CURT Electrical Adapter (7-Way RV Blade Vehicle to 4-Way Flat Trailer): Simplify Your Trailer Connections

The CURT Electrical Adapter converts a 7-way RV blade vehicle socket into a 4-way flat trailer connector, providing a convenient and reliable solution for your towing needs. Its simple plug-and-play design eliminates the need for cutting or splicing wires, ensuring quick and hassle-free installation.

The 4-way flat output efficiently connects essential trailer functions, including tail lights, brake lights, and turn signals, making it an indispensable tool for safe and effective towing. Built with CURT’s quality craftsmanship, this adapter delivers dependable performance across various trailer applications.

Note: All CURT items are subject to a 15% restocking fee.


  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • All CURT items have a 15% restocking fee
Item Description Price Qty in
Package 		In Stock Add to Cart
CURT57240 CURT 57240, 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter (1 MIN) 5.81 1 EA Call
CURT57241 CURT 57241, 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter (1 MIN) 7.96 1 EA Call

CURT Electrical Adapter with Tester (7-Way RV Blade Vehicle to 4-Way Flat Trailer)

CURT Electrical Adapter with Tester (7-Way RV Blade Vehicle to 4-Way Flat Trailer)

CURT Electrical Adapter with Tester (7-Way RV Blade Vehicle to 4-Way Flat Trailer): Reliable and Convenient Towing Solution

The CURT Electrical Adapter with Tester converts a 7-way RV blade vehicle socket into a 4-way flat trailer connector, offering a versatile and efficient solution for towing. Its plug-and-play design eliminates the need for cutting or splicing, ensuring a quick and easy installation process. Equipped with an integrated LED tester, this adapter confirms the proper function of the vehicle-side wiring, providing peace of mind before hitting the road. The 4-way flat output connects tail lights, brake lights, and turn signals, ensuring safe and reliable trailer operation. A dust cover protects the connector when not in use, enhancing durability and maintaining optimal performance. Built to CURT’s high standards, this adapter is an indispensable tool for any towing setup. Note: All CURT items are subject to a 15% restocking fee.


  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • LED tester confirms proper function of vehicle-side wiring connector
  • Dust cover keeps connector clean when not in use
  • All CURT items have a 15% restocking fee
Item Description Price Qty in
Package 		In Stock Add to Cart
CURT57245 CURT 57245, 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter with Tester (1 MIN) 9.96 1 EA Call

CURT Electrical Adapter Harness (7-Way RV Blade Vehicle to 4-Way Flat Trailer)

CURT Electrical Adapter Harness 7-Way RV Blade Vehicle to 4-Way Flat Trailer

CURT Electrical Adapter Harness (7-Way RV Blade Vehicle to 4-Way Flat Trailer): Durable and Versatile Towing Solution

The CURT Electrical Adapter Harness converts a 7-way RV blade vehicle socket into a 4-way flat trailer connector, offering a durable and reliable solution for towing needs. The plug-and-play design ensures quick installation without the need for cutting or splicing, making it a hassle-free choice for efficient connections.

This adapter harness features a UV-resistant coiled cable that extends up to 5 feet without dragging on the ground, ensuring flexibility and ease of use. Its molded plastic housing resists corrosion, delivering long-lasting performance even in challenging environments. The 4-way flat output connects tail lights, brake lights, and turn signals, providing a dependable link for safe towing.

Note: All CURT items are subject to a 15% restocking fee.


  • Adapts 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Durable molded plastic housing resists corrosion
  • All CURT items have a 15% restocking fee
  • UV-resistant coiled cable extends up to 5' without scraping the ground
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
Item Description Price Qty in
Package 		In Stock Add to Cart
CURT57271 CURT 57271, 5-Foot 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter Extension Harness (1 MIN) 28.42 1 EA Call
CURT57280 CURT 57280, 8’ Electrical Adapter Harness (7-Way RV Blade Vehicle To 4-Way Flat Trailer)  (1 MIN) 36.84 1 EA Call

CURT Adapter with Backup Alarm (7-Way RV Blade Vehicle to 4-Way Flat Trailer)

CURT Adapter with Backup Alarm 7-Way RV Blade Vehicle to 4-Way Flat Trailer

CURT Adapter with Backup Alarm (7-Way RV Blade Vehicle to 4-Way Flat Trailer): Safe and Convenient Towing Solution

The CURT Adapter with Backup Alarm seamlessly converts a 7-way RV blade vehicle socket into a 4-way flat trailer connector, offering both functionality and enhanced safety for your towing setup. With a plug-and-play design, this adapter eliminates the need for cutting or splicing, making installation quick and effortless.

The 4-way flat output connects essential trailer functions, including tail lights, brake lights, and turn signals, ensuring safe and reliable operation. An integrated backup alarm provides an audible warning when the vehicle is in reverse, increasing safety during towing maneuvers. Additionally, a dust cover protects the connector when not in use, maintaining its durability and performance. This CURT adapter is a practical, all-in-one solution for towing with added safety features.

Note: All CURT items are subject to a 15% restocking fee.


  • Adapts a 7-way RV blade vehicle socket to fit 4-way flat trailer plugs
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Integrated backup alarm sounds when vehicle is in reverse
  • Dust cover keeps connector clean when not in use
  • All CURT items have a 15% restocking fee
Item Description Price Qty in
Package 		In Stock Add to Cart
CURT57724 CURT 57724, 7-Way RV Blade Vehicle-Side to 4-Way Flat Trailer Wiring Adapter with Backup Alarm (1 MIN) 16.75 1 EA Call
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