Nilight 4 Pin Trailer Wiring Harness Kit for RAV4 & Outlander PHEV

Our review of the Nilight 4 Pin Trailer Wiring Harness Kit finds it best suited for owners of 2019-2024 Toyota RAV4, 2021-2024 RAV4 Prime and 2023-2025 Mitsubishi Outlander PHEV who need a straightforward, OEM-compatible way to add a standard 4-way connector. The single biggest reason to buy is its plug-and-play design that avoids cutting or splicing factory wires, making it a practical choice for DIYers who want reliable trailer lighting without professional wiring work.

Key Features

• Vehicle-specific fit: Designed to plug into factory harness locations behind rear access panels for the listed RAV4 and Outlander PHEV model years, ensuring a neat, integrated install.
• Standard 4-way connector: Provides a common 4-flat trailer plug to power tail lights, brake lights and turn signals, adding towing versatility for many trailer types.
• Plug-and-play installation: No cutting or splicing of factory wiring is required, which reduces installation time and preserves the vehicle's original wiring integrity.
• Weather protection: Includes a tight-fitting rubber dust cover to protect the 4-way flat connector when not in use, extending the connector's outdoor durability.
• Complete kit: Ships with the custom harness, zip ties, a screw, a 10A fuse and extra wire to tidy and secure the install under the vehicle.

Who It's For

This harness is aimed at RAV4 and Outlander PHEV owners who tow occasionally and prefer a simple, OEM-style connection for trailer lights without modifying factory wiring. It is also a good match for DIY car owners who want a neat installation that tucks the 4-way connector beneath the vehicle near the hitch.

It is not intended for drivers who need a multi-function, powered 7-way towing connector or those with older or different model years outside the specified range. Buyers who require integrated electric brake control or extra circuits should look for a different, heavier-duty wiring solution.

Pros & Cons

Pros

• Easy plug-and-play installation preserves factory wiring and saves time.
• OEM-compatible connectors give a reliable, vehicle-specific fit for the listed models.
• Includes a dust cover and necessary hardware so customers receive a complete kit.
• Standard 4-way connector supports common trailer lighting functions, adding practical towing capability.

Cons

• Assembly quality received mixed feedback from some buyers, so careful routing and securing during install is recommended.
• Only provides a 4-pin connection; drivers needing powered or additional circuits will require a different harness.

Specifications

Compatible vehicles	2019-2024 Toyota RAV4; 2021-2024 RAV4 Prime; 2023-2025 Mitsubishi Outlander PHEV
Connector type	Standard 4-flat trailer plug
Installation	Plug-and-play, no cutting or splicing factory wire
Weather protection	Rubber dust cover included
Package contents	Custom 4-pin harness, zip ties, screw, 10A fuse, extensive wire

Our Verdict

For owners of the specified RAV4 and Outlander PHEV years who need a simple and reliable way to add trailer lighting, this Nilight harness is a sensible, cost-effective choice that preserves factory wiring and includes the parts needed for a clean install. It offers clear value for towing Basics, though those needing extra circuits or higher-duty towing connections should consider alternatives.

Frequently Asked Questions

Will this plug into my vehicle without cutting wires?
Yes. The harness uses OEM-compatible connectors that plug into factory locations behind the rear access panels, so no cutting or splicing is required.

Does it include protection for the connector when not in use?
Yes. A tight-fitting rubber dust cover is provided to protect the 4-way flat connector from the elements.

Is this compatible with a 7-way trailer plug or electric brakes?
No. This kit provides a standard 4-pin connection for lighting only; a separate 7-way or powered harness is required for electric brakes or extra circuits.