Attwood Marine Trailer Wiring Connector Set, 4-Way Flat, 12 in Plug

Overview

The Attwood Marine 14020-3 is a 4-way flat trailer repair connector set with both vehicle-side and trailer-side ends for restoring a standard trailer-light connection. It uses copper-stranded, color-coded wire with plastic molded terminals, and the set includes an 18-inch plug wire and a 48-inch socket wire for routing and splicing during a repair.

This connector is a practical match for boat trailers that need a clean replacement at the tow vehicle connection or at the trailer lead. The extra wire length gives you room to cut back damaged sections and make new splices without having to replace the full harness.

Key features

• 4-way flat connector set with vehicle-side and trailer-side ends
• 18-inch plug wire and 48-inch socket wire for repair work where extra lead length helps
• Copper-stranded, color-coded wire that makes circuit matching easier during installation
• Plastic molded terminals that keep the plug ends together and protected at the connection point
• Black semi-universal connector set for standard 4-way flat trailer-light wiring layouts

Compatibility and fit

This set fits trailers that use a 4-way flat connector for basic lighting circuits. It is meant for repair or replacement work on a standard flat-four connection, so it is worth checking your current plug style before ordering if your trailer has been converted to a 5-way, 6-way, or 7-way setup.

For boat owners, this is a sensible option when the plug area has taken repeated strain at the trailer tongue or when the original connector has become worn after frequent launching and towing. It suits buyers who want to repair the connection without changing the rest of the trailer wiring more than necessary.

Installation and setup

The color-coded leads help keep the wiring straightforward when matching circuits from the tow vehicle to the trailer harness. The longer 48-inch socket wire gives more room on the trailer side, while the 18-inch plug wire works well where a shorter lead is preferred near the vehicle connection.

As with any trailer-light repair, the cleanest result comes from trimming back damaged wire, making sealed splices, and securing the harness so it does not hang where it can drag, chafe, or flex at the connector.