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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2000 Chrysler LHS
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CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C54RJ
In Stock
$98.40
Retail:$166.95
You Save: 41%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2000 Chrysler LHS

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C54RJ or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (3)
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  • Videos (1)
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CURT Custom Fit Vehicle Wiring - C54RJ

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat plug powers trailer lights when your vehicle lacks wiring.
  • Plug-and-Play Install: T-connector plugs inline with tail lights—no cutting or splicing needed.
  • Powered Converter Protection: Built-in module syncs trailer signals while guarding vehicle circuits.
  • Clean Hidden Setup: Harness routes behind panels for a factory-style look and safer wire routing.
  • Reliable Connection: Weather-sealed plugs and strong leads keep lighting consistent on the road.

Features to know about

Installs Without Cutting or Splicing: Plug-In Harness

Wiring a trailer often means dealing with factory wires, but this Curt T-Connector skips all that. It plugs straight into existing connectors to give you a 4-pole flat trailer plug. No cutting, no tracing wires—just a clean plug-in that’s ready to go.

Protects Vehicle Electronics: Built-In Powered Converter

This harness uses a powered converter to isolate and protect your vehicle’s sensitive wiring from potential overload or feedback from the trailer lights. It makes sure everything runs safely and reliably every time you tow.

Ready for Common Towing Needs: 4-Flat Trailer Connector

The included 4-flat connector covers the basics—running lights, brake lights, and turn signals—so your trailer stays fully visible and street legal. It’s the standard connection used on most small and midsize trailers.

Clean Look with Hidden Install: Factory-Style Fit

Designed to stay out of sight, the harness tucks neatly behind panels or trim for a factory-style finish. The hidden setup keeps your wiring protected and gives the back of your vehicle a clean look when you’re not towing.

Simple Upgrade for Vehicles Without a Tow Package

If your vehicle didn’t come with wiring from the factory, this kit fills that gap. It supplies everything needed to add trailer lighting without having to buy or modify extra components. Plug it in and you’re ready to tow safely.

Specs

Electrical Specifications

  • Connector type: 4-pole flat
  • Function: Provides a 4-way flat trailer connector for brake, tail, turn, and ground signals
  • Power type: Powered converter

Installation Details

  • Installation type: Plug-in T-connector
  • Compatibility: Vehicle end connector
  • Intended for vehicles with: No tow package
  • Mounting style: Hidden
  • Design: Plug and lead configuration

Manufacturer

  • Brand: CURT

Comparison chart showing several Curt T-Connector Vehicle Wiring Harnesses with labeled components and connectors for easy product comparison.


56536 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C54RJ Installation instructions

This Product Fits The Following Vehicles




Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of CURT Custom Fit Vehicle Wiring - T Connector Vehicle Wiring Harness 4 Pole Flat - C54RJ

Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this CURT T-connector vehicle wiring harness with four-pole flat trailer connector. Now, this harness has been designed to fit your 2023 and newer Toyota Crown. And on custom-fit parts such as this harness, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle, and our fit guide will confirm if this will work for you or if we have something comparable that will work for you. So this is going to give you a four-way flat trailer connector at the back of your Crown to power your trailer's signal lights.

This will also be compatible with five-, six-, and seven-pole adapters. Those adapters are sold separately. As you can see, this does come with a dust cap for that four-way flat connector when it's not in use to protect those connection points. And as you know, a well-lit trailer is a safe trailer, so this four-way wiring harness is gonna keep your trailer's brake lights, turn signals, and running lights powered and sync, and in sync, rather, with your Crown. So whether you're hauling a boat to the lake or a camper to the mountains, your lights are gonna stay bright and visible.

Now, these custom-fit T-connectors are going to snap directly into your factory wiring harness. So you'll get your trailer lights up and running without any cutting or splicing. You're just gonna plug these in and you're gonna be ready to tow. The vehicle's wiring harness is often behind a trim panel or under the cargo floor. Some vehicles may require removing interior panels or lifting carpeted sections to reach it.

But once accessed, this harness installs easily with these T-connectors. Now, some vehicles can't handle the extra electrical load of trailer lights. The built-in powered converter here is gonna draw power directly from your Crown's battery, ensuring a steady, protected current to your trailer while keeping your vehicle's circuits from overloading. So this kit does come with everything that you are going to need. As you can see, it does come with a fuse holder.

And then within this hardware bag is gonna be a fuse, butt connectors, cable ties, and adhesive strip here for mounting the converter box. You're gonna get a tube of black silicone, and of course, instructions to guide you through that installation process. So really, you shouldn't need any extra parts installing this kit. You should have everything that you need. Now, it is also recommended that you use a small amount of dielectric grease on all of your electrical connections, like the plugs on the vehicle and the four-pole flat connector itself. That grease is designed to help prevent electrical failures caused by corrosion and moisture. So on your screen, I am including the part number for that grease. You can take that part number, pop it in the search field of our website. That will take you to that grease and you can add that to your order if you so desire. Once you get this installed, we would love to hear back from you regarding your experience with getting this installed and even using it. And you can share your experience with us by dropping a comment or leaving a review on this product page. Let us know how it's working out for you. We would love to hear back from you. Well, that's gonna wrap up our look today. I do hope that our time together has been helpful for you. Again, my name is Andy. Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

4.7

3 reviews
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by:
2025 Toyota Crown
Very reliable. Good products delivered quickly.
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Will Curt Hitch Fit 2025 Toyota Crown Limited
    Hey Todd, welcome back! The Curt Trailer Hitch Receiver # C77ZV will fit your 2025 Toyota Crown Limited. Then for wiring to power your lights you can use the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C54RJ. If you need anything else hit the reply button below.
    view full answer...
  • Trailer Hitch For A 2023 Toyota Crown Platinum
    Hi Steve! The Curt # C77ZV you were looking at will fit your 2023 Toyota Crown Platinum without issues. This is rated for 3,500 pounds towing and 350 pounds of tongue weight, but I checked your owners manual and it does say not to tow. However, I have seen a couple international forums saying they can tow up to around 2,600 pounds. It would be prudent to see what a Toyota dealer says in the matter. Side note, how small of a trailer are we talking? If they give you the ok, you will also...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W

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