This plug gives you a clean, reliable 4-way round connection on the vehicle side of your trailer wiring. It’s designed for straightforward wiring of basic light functions—left and right stop/turn, tail lights, and ground—so you can get your trailer lights working without hassle.
The plug housing is built to accept up to 10-gauge wire, giving you flexibility for different setups. Light functions typically use 16-gauge wire, while the ground uses 12-gauge. That means it’s strong enough to handle standard trailer lighting circuits without overheating or loose fits.
Instead of soldering or crimp connectors, this plug uses set screws to secure the wiring. That makes it easy to attach or replace wires when needed, keeping it simple to maintain or swap out if you ever update your wiring setup.
The socket follows a straightforward layout—top left is left stop/turn (yellow), top right is right stop/turn (green), bottom left is ground (white), and bottom right is tail lights (brown). With this labeled layout, you can match wires quickly and know everything’s connected right the first time.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Jeff Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the replacement vehicle-end four-wire plug for your Blue Ox coiled electrical cord. Now this part here will replace the car-end four-way round plug from your Blue Ox coiled electrical cord. And this is designed to work with the cord part number BX88254 or the BX 8861. Both of those cords we do sell separately on our website. This part here is designed to mount to the front of your towed vehicle's base plate for easy hookup.
If you notice, it has a nice spring-loaded lid here that when you let it go, keeps dust and moisture out of the connector when it's not in use, protects the terminals from any damage. You can see it has two mounting holes right here. Now the measurement between those mounting holes, if we put a ruler on it, gonna be right at 1 3/4 inches. This is a durable metal construction. It is made in the U.S.A.
The diameter of the hole that this plug will fit into is 1 inch. And again, this is for a quantity of one four-way plug. But that should do it for the review on the replacement vehicle-end four-wire plug for your Blue Ox coiled electrical cord.
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