4-Way Electrical Adapters

A CURT 4-way electrical adapter is the most commonly used type of towing harness adapter and connects most trailers to most vehicles. The 4-way trailer adapter has four pins corresponding to the basic functions of a trailer's electrical system: running lights, turn signals, brake lights and ground. 

A 4-pin trailer adapter is compatible with most vehicle wiring systems, making it versatile and easy to use. Simply plug it into the vehicle's existing wiring harness and connect the corresponding pins to the trailer's wiring system for a safe and reliable connection.

Our 4-way pin adapters come in two styles: 4-way flat electrical adapters and 4-way round electrical adapters. These adapters can be used on differing applications and CURT also offers a 4-way flat to 4-way round adapters. 

The 4-way electrical adapter is relatively simple to use and install, making it a popular choice among drivers when towing. It provides a secure and reliable connection, ensuring that the trailer's electrical system functions correctly. 

If you need assistance with your trailer’s 4-wire connection, check out our comprehensive Ultimate Guide to 4-Wire Trailer Connectors for additional information.