CURT Trailer Wiring T-Connector for Toyota Highlander 2008–2014 — 4-Way Flat Plug, No Splice Installation

The CURT 56217 is a vehicle-specific plug-and-play trailer wiring T-connector that gives your 2008–2014 Toyota Highlander a standard 4-way flat trailer socket without cutting or splicing factory wiring.

This CURT custom wiring connector is engineered to mate with the Highlander’s existing wiring harness and delivers a reliable, OEM-compatible trailer connection. Designed for a clean installation and long-term durability, the kit includes the wiring assembly, mounting hardware and a protective dust cover. It’s built for straightforward installation in roughly 30 minutes and is tested to maintain consistent lighting and brake signal performance for towing everyday trailers, small boats, or utility loads.

How does this T-connector install on my Highlander?

Installation is plug-and-play: the CURT 56217 plugs directly into the vehicle’s factory wiring harness without cutting, splicing, or soldering. The connector routes to a 4-way flat socket mounted at the rear and secures with the included hardware and dust cover for a neat, factory-like finish.

• Uses vehicle-specific OEM-style plugs for a precise fit
• Approximate install time: 30 minutes
• No wire cutting, crimping, or soldering required
• Includes dust cover and any converter necessary for functionality

What trailer functions and circuits are supported?

The CURT 56217 provides a standard 4-way flat socket that handles tail, stop, turn and ground circuits for basic trailer lighting. It’s built on a 3-wire electrical system with protected and powered circuit design to keep signals stable and safe during towing.

• 4-way flat output: running lights, left/right turn, stop lights
• 3-wire design with ground and protected/powered features
• Factory-compatible signals to reduce electrical faults

Will this work with my Highlander or Lexus RX350?

This connector fits 2008–2014 Toyota Highlander models without the factory prep package and is also compatible with certain Lexus RX350 models listed in the application notes. Always confirm vehicle fitment against your specific year and options before purchase to ensure compatibility with the factory tow socket or harness.

• Vehicle-specific fit: made for select 2008–2014 Highlander applications
• May require factory tow package on some Lexus RX350s—check application details
• Designed to plug into the OEM harness for correct signal routing

How durable and maintenance-friendly is the connector?

CURT manufactures these connectors to withstand typical road and weather exposure; the kit is tested for consistent electrical performance. A supplied dust cover helps prevent moisture and debris from entering the socket when not in use, and the rugged plugs hold securely under vibration.

• Includes dust cover to protect the socket from contaminants
• Rugged connector housing resists road vibration and moisture
• Tested for consistent signal performance under normal towing conditions

Who this is for: The CURT 56217 is for Toyota Highlander or compatible Lexus RX350 owners who want a clean, OEM-style trailer wiring solution without modifying factory wiring. It’s ideal for drivers who tow small trailers, utility trailers, boats, or cargo carriers and want an easy installation, reliable electrical connections, and a tidy, protected receptacle that blends with the vehicle’s original equipment.