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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
2002 Cadillac Escalade
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CURT

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

Part Number: C89CR
In Stock
$73.28
Retail:$115.95
You Save: 37%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2002 Cadillac Escalade

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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 - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C89CR 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.
  • All Info
  • Reviews (22)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C89CR

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-pole flat connector powers trailer turn, brake, and running lights.
  • Plug-and-Play Install: T-connector plugs inline with tail lights—no cutting or splicing needed.
  • Reliable Power Feed: Powered converter draws directly from battery for stable lighting current.
  • Protects Vehicle Wiring: Isolated module prevents trailer faults from affecting car circuits.
  • LED-Ready Output: Handles 3 amps per stop/turn and 6 amps running lights for modern trailers.

Features to know about

Installs Without Cutting or Splicing: Plug-In T-Connector Design

Wiring a trailer doesn’t have to mean cutting into your factory wiring. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector uses plug-in connectors that tie directly into your vehicle’s tail light wiring. The harness fits inline with the factory plugs, so installation is clean and simple—no wire tracing, no splicing.

Protects Vehicle Electronics: Powered Converter Circuit

This harness includes an integrated powered converter that draws power directly from the vehicle battery instead of the tail light circuit. That protects sensitive electronics and ensures steady trailer lighting performance. The powered converter is rated for 3 amps each on the right and left turn/brake circuits and 6 amps on the running light circuit, giving you reliable power for your trailer lights.

Ready for Standard Trailer Lighting: 4-Flat Connector Output

Once installed, the 4-flat connector gives you all the basics—running lights, turn signals, and brake lights—for safe towing of small to mid-size trailers. It’s the standard connection used on most utility, boat, and cargo trailers, so you can plug in and go without any adapters or rewiring.

Clean Install with Hidden Wiring: Vehicle-End Mounting

Designed as a hidden plug-in system, the harness routes neatly along existing panels and uses a vehicle-end connector that stays out of sight until you need it. The result is a tidy setup that keeps wiring protected from road debris and moisture while maintaining a factory look when not towing.

Specs

Electrical Specifications

  • Right turn and brake circuit capacity: 3 amps
  • Left turn and brake circuit capacity: 3 amps
  • Running light circuit capacity: 6 amps

Comparison image showing multiple Curt T-Connector vehicle wiring harness kits with overlaid reference labels for connectors and converter boxes on a white background.


56451 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Tekonsha TK64VR

Installation Details C89CR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

22 reviews
5 Stars
(19)
4 Stars
(2)
3 Stars
(0)
2 Stars
(0)
1 Star
(1)
Review Sort Icon
by:
2021 Hyundai Venue
Product is well made. Installing is relatively straight forward. Running cable to the 12v battery is not straight forward. I found a way (on Hyundai Venue) to run cable to the rear of car without drilling holes, without touching any metal and all inside the car 100% hidden. Running this 12v cable took longer than installing the converter box (and associated connectors).
Han profile picture

Han

2/12/2023

Update. Product did not work out well. In fact this product was faulty and I purchased an other one which worked correctly. I was asked to send faulty product back at my cost. Unacceptable. So I simply took it apart and recycled the electronics.

by:
This wiring harness kit was a perfect fit - all connectors and wires were just what was required. No cutting or spicing taillight wires. Great installation instructions along with every fitting needed to complete the process. I would give this 10 stars if I could!
Mark profile picture

Mark

1/19/2022

Still 100... great product!

by:
Just what I needed!
Terry profile picture

Terry

7/14/2025

A year later and we have been very happy with this choice. No problems at all.

Lazer S. profile picture
Etrailer Expert

Lazer S.

7/15/2025

@Terry Glad to hear the wiring is working well for you, Terry! Did you end up leaving the end of the 4-flat in the cargo area or did you mount it outside near the hitch? And out of curiosity, what are you towing with your Hyundai Venue?
Terry profile picture

Terry

7/16/2025

@LazerS We leave the harness in the spare tire well and pull it out when needed. As for what we pull with the Venue. We have a 10’ Utility trailer that we use to haul many things like yard waste, mulch and 4x8 plywood. Thanks for making so many great products.
Lazer S. profile picture
Etrailer Expert

Lazer S.

7/16/2025

@Terry Definitely the best way to keep the 4-way clean and out of harm's way when not in use! Good to hear it's putting in work. Let me know if you need anything else or if there is anything I can help with! : )
by:
Arrived 1 day early. Will buy from etrailer agin
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Fast shipping
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Donald profile picture

Donald

8/20/2026

Never did work as I was told twice it would.

by:
2022 Hyundai Venue
everything good except for original back order. very professional.
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Got it all installed fit perfectly
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2024 Hyundai Venue
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2026 Hyundai Venue
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Is There an Install Video for Curt Trailer Wiring for 2024 Hyundai Venue
    Hey Ralph, we haven't had the chance to install the Curt trailer wiring harness part # C89CR on a Hyundai Venue like your 24' so we don't have an install video yet but in meantime I attached a link to the install instructions which are very detailed and will walk you through the entire process.
    view full answer...
  • Troubleshooting Trailer Lights Not Working w/ Headlights On With Curt C89CR Installed On '22 Venue
    Hey Joe, sorry to hear about the issues you're running into! The Curt # C89CR you installed on your '22 Venue is rated for 3amps for the right turn and brake, and 3 amps for the left turn and brake, along with 6 amps for the running light circuit. Based on the LED you mentioned you installed, you're no where near having too much load for your vehicle wiring. Did you ground each light directly to the frame? The issue you are describing is a classic ground issue. I'd double check that each...
    view full answer...
  • Does Trailer Hitch For 2024 Hyundai Venue Have Concealed Crosstube
    As you can see of the photo I added for you, the crosstube will be totally concealed on your 2024 Hyundai Venue after installing the Curt hitch that fits, which is the following part number: - Curt Trailer Hitch Receiver # C57CR I also wanted to add, in case you were going to be doing some towing and need a trailer wiring harness, the correct fit for your '24 Venue is the T-Connector Vehicle Wiring Harness # C89CR.
    view full answer...
    Image 1 for
  • Trailer Hitch Receiver Fit on 2020 Hyundai Venue
    You'e in luck as there is a trailer hitch receiver that is a fit for a 2020 Hyundai Venue, which is the following: - Curt Trailer Hitch Receiver # C57CR This is a Class I hitch with a 1-1/4 inch receiver, and is a complete bolt-on installation with no drilling needed. It also has a really nice concealed look, as you can see from the accompanying photo, so your '20 Venue will maintain it's aesthetic. I have added a link to the installation instructions for you to check out as well. If...
    view full answer...
    Image 1 for
  • Trailer Hitch & Wiring Harness For 2024 Hyundai Venue
    We do have both a trailer hitch receiver as well as 4-way wiring harness for your 2024 Hyundai Venue, with the correct part numbers being the following: - Curt Trailer Hitch Receiver # C57CR - T-Connector Vehicle Wiring Harness # C89CR I went ahead and verified both fits directly with the manufacturer for you.
    view full answer...
  • Trailer Hitch Receiver and Wiring Recommendation For a 2024 Hyundai Venue
    Yes, we have the Draw-Tite Trailer Hitch Receiver # DT24MR which I recommend for your 2024 Hyundai Venue. This is custom fit so you will not need to drill or weld any components of your receiver to your Venue. I do recommend installing the Curt T-Connector Vehicle Wiring Harness # C89CR when you install the receiver. This will give you a 4-way flat that you will need should you decide to pull a small trailer or add Auxiliary Lights # C53201.
    view full answer...
  • What 4-Way Wiring Harness do You Recommend for My 2021 Hyundai Venue?
    With the Draw-Tite Hitch - 1-1/4" # DT24MR on your 2021 Hyundai Venue, I recommend the T-One Wiring Harness # TK64VR. The Tekonsha T-One comes with a better-quality converter box than the Curt T-Connector # C89CR. The T-One provides your trailer with basic turn signal, brake light, and running light functions. To complete the setup, I also recommend a ball mount/ball like the ones that come with the Curt Towing Starter Kit # C45147. This kit comes with a hitch pin and a 2-inch ball.
    view full answer...
  • Recommended Trailer Hitch 2022 Hyundai Venue
    Yes, we do have a hitch for your 2022 Hyundai Venue. I suggest the Curt Trailer Hitch Receiver, # C57CR. This is an easy bolt-on install. It is a class I rated hitch, 1-1/4" receiver opening and can be used for both towing as well as bike racks and cargo carrier. If you plan on using this for towing, you will need the T-Connector Vehicle Wiring Harness, # C89CR, a ball mount, # C45521, the Pin and Clip # F-4, and depending on the size of your trailer's coupler either 1-7/8" Hitch Ball...
    view full answer...
  • Which 4-Pole Trailer Wiring Harness for 2023 Hyundai Palisade?
    The Curt # C89CR trailer wiring harness you'd looked at isn't a fit for a 2023 Hyundai Palisade, but fortunately we DO have an option for you that is mostly plug and play. You'll want to use the Curt # C43FV. The harness plugs inline between the vehicle's taillight wiring harnesses and the taillight assemblies. You'll need to run one wire under the vehicle to the positive battery terminal to provide power for the harness. I've linked the installation instructions for you, and also linked...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Written by:
Kristina F

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