MECMO 4-Way Flat Trailer Wiring Harness for Dodge & Chrysler 2011–2022 — Plug‑n‑Play 4-Pin, Corrosion-Resistant

MECMO 4-way flat trailer wiring harness 56331 is a vehicle-side, plug-and-play T-connector designed to restore full trailer lighting compatibility for 2011–2020 Dodge Grand Caravan, 2011–2016 Chrysler Town and Country, and 2021–2022 Chrysler Grand Caravan models.

This custom-fit wiring harness provides a reliable 4-pin flat connector that taps into your van’s existing tail-light circuits without splicing. Built with heavy-duty bonded wire and tin-plated copper terminals, it protects connections from corrosion while offering a dust cover and ergonomic tabs for easier hooking and unhooking of trailers or LED exterior lights. The connector stows neatly beneath the vehicle near the hitch once installed.

How does this harness connect to my Grand Caravan or Town & Country?

The MECMO 56331 is a direct plug-in T-connector that mates with the factory wiring located behind each tail light—no cutting or complex rewiring required. It fits the specified model years and vehicle sides, delivering the four standard trailer signals through a single flat plug.

• Prewired vehicle-side T-connector for an OEM-style fit
• Plugs into factory tail light harnesses—no splicing
• Stows under vehicle near the receiver hitch when not in use

What lighting functions will the 4-pin plug provide?

The 4-way flat connector supplies power for the essential trailer lighting circuits—tail/park lights, left and right turn signals, and stop lights—so trailers comply with road safety lighting needs. It’s suitable for basic trailer lighting and small cargo or utility trailers.

• Tail/marker lights and license illumination
• Brake and stop light signal pass-through
• Left and right turn signals synchronized with vehicle input

Is this harness durable and weather resistant for long-term use?

The wiring harness uses heavy-duty bonded wires and premium tin-plated copper terminals to resist corrosion and maintain conductivity under normal road conditions. A snug dust cover and tabbed housing reduce exposure to moisture and debris, extending the life of the connector.

• Tin-plated copper terminals for improved corrosion resistance
• Bonded wire construction to reduce wear and chafing
• Protective dust cover and ergonomic tabs for secure handling

How quick is the installation and what tools are needed?

Installation is intended to be straightforward: disconnect the factory tail-light plugs, attach the MECMO T-connector, and route the 4-pin plug toward the hitch. Most owners can complete the job with basic hand tools and no electrical splicing.

• Plug-and-play design—no wire cutting or soldering
• Basic hand tools recommended for access and routing
• Quick stow under the vehicle when not towing

Who is this for: This MECMO 4-way flat trailer wiring harness is aimed at Grand Caravan and Town & Country owners who want a clean, OEM-style trailer lighting hookup without modifying factory wiring. It’s ideal for occasional tow users, small trailer owners, fleet maintenance, or anyone seeking a durable, vehicle-specific connector that installs quickly and protects terminals from the elements.