4 Pin Trailer Wiring Harness for Jeep Grand Cherokee 2022-25 - Simple

In this review of the Nilight 4 Pin Trailer Wiring Harness Kit, the bottom line is straightforward: this is a practical plug-and-play solution for owners of 2022-2025 Jeep Grand Cherokee and 2021-2025 Grand Cherokee L who need a standard 4-way trailer connector without cutting factory wiring. The kit's vehicle-specific OEM-compatible connectors and included dust cover make it a quick install for weekend DIYers and installers who want a clean, stowed 4-flat connector near the hitch. For those prioritizing a hassle-free wiring addition and long-term weather protection, this harness delivers the core functionality expected.

Key Features

• Vehicle-specific fit: Designed for 2022-2025 Jeep Grand Cherokee and 2021-2025 Grand Cherokee L so the connectors match the factory harness behind the taillight housings for a snug, OEM-style connection.
• Standard 4-way connector: Provides a common 4-flat trailer wiring interface to power trailer tail lights, brake signal lights and turn signals for broad towing compatibility.
• Plug-and-play installation: No cutting or splicing of factory wire is required, making the harness suitable for quick DIY installation and reducing risk to the vehicle wiring.
• Weather protection: Includes a tight-fitting rubber dust cover to protect the 4-way flat connector when it is stowed beneath the vehicle, improving long-term reliability in outdoor conditions.
• Complete kit: Ships with the custom harness, zip ties, screw, 10A fuse and extra wire so installers have the basic hardware needed to mount and secure the connector at the hitch.

Who It's For

This harness is ideal for Jeep Grand Cherokee and Grand Cherokee L owners who tow small trailers, cargo carriers or light equipment and want a noninvasive, factory-friendly wiring solution. It fits owners who prefer a tidy, stowed 4-flat connector and a straightforward install without professional wiring or body panel modification.

It is less appropriate for users who require multi-function trailer wiring beyond the standard 4-way (such as trailer brakes or powered accessories) or for vehicle owners who need a universal harness for many different makes and models. Those customers should look for a multi-pin or powered controller solution instead.

Pros & Cons

Pros

• Easy plug-and-play installation that avoids cutting factory wires and preserves the vehicle harness.
• Vehicle-specific OEM-compatible connectors yield a clean, secure fit behind taillight housings.
• Includes a rubber dust cover and mounting hardware, improving protection and convenience for long-term use.

Cons

• Some customers report mixed functionality with turn signals or brake light outputs on trailers, indicating compatibility or grounding checks may be required in some setups.

Specifications

Compatible Vehicles	2022-2025 Jeep Grand Cherokee; 2021-2025 Grand Cherokee L
Connector Type	4-flat standard trailer connector
Installation	Plug-and-play, no cutting or splicing factory wire
Included Hardware	Custom 4-pin harness, 9 zip ties, 1 screw, 10A fuse, extensive wire
Protection	Rubber dust cover for the 4-way connector
Location After Install	Stowed beneath vehicle near trailer hitch

Our Verdict

For Grand Cherokee owners who need a straightforward, vehicle-matched 4-way trailer connector, this harness is good value: it preserves factory wiring, includes the necessary mounting hardware and offers weather protection with the dust cover. Buyers should verify trailer light function after installation, but for a simple tow lighting solution that stays tucked under the hitch, this kit is a practical, low-cost choice.

Frequently Asked Questions

Will I need to cut my vehicle wiring to install this?
No. The harness is designed to plug into OEM connectors behind the taillights so no cutting or splicing of factory wire is required.

Does the kit include a dust cover for outdoor use?
Yes. A tight-fitting rubber dust cover is included to protect the 4-way flat connector when it is not in use.

Will this power trailer brake controllers?
No. This standard 4-flat connector provides tail, brake signal and turn circuits but does not supply dedicated power for electric trailer brakes or auxiliary powered accessories.