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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
2006 Toyota Matrix
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CURT

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

Part Number: C55325
In Stock
$47.88
Retail:$74.99
You Save: 36%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2006 Toyota Matrix

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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 C55325 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 (39)
  • Q & A (0)
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CURT Custom Fit Vehicle Wiring - C55325

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer turn, brake, and tail lights.
  • Plug-and-Play Install: T-connector plugs inline with tail lights—no cutting or splicing.
  • Reliable Grounding: Built-in ground provides proper function without extra frame terminal.
  • Weather-Tough Design: Sealed connections handle road spray and rain for dependable use.
  • Quick Lighting Setup: Converter syncs vehicle signals so trailer lights work correctly.

Features to know about

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

Wiring a trailer usually means tracking down wires and making splices, but this Curt harness skips all that. The T-Connector plugs directly into the vehicle’s existing tail light wiring to give you a 4-pole flat trailer connector. There’s no need for a factory tow package—just plug it in and it’s ready for use.

Comparison image of Curt T-Connector vehicle wiring harnesses showing plug-in connectors and 4-pole flat trailer connectors for different vehicle fitments.

Handles Everyday Weather with Sealed Design: Durable 4-Flat Connector

Towing often means exposure to rain, puddles, and road spray. This harness is built to handle normal wet conditions without issue, keeping your trailer lights working dependably. It’s not made for submersion, but stays dry and protected in everyday use thanks to the weather-resistant 4-flat connector.

Ready for Trailer Basics: Running, Turn, and Brake Lights in One Plug

Once installed, the 4-pole connector gives you the standard lighting functions—running lights, turn signals, and brake lights—so your trailer stays visible and legal on the road. It’s a simple way to add all the essentials in one clean hookup.

Grounds Automatically: No Frame Connection Needed

Some harnesses need a separate ring terminal ground, but this one doesn’t. It’s designed to ground through the factory connection points, so there’s no extra wire to route or attach to the frame. That keeps installation cleaner and faster from start to finish.

Specs

Electrical Specifications

  • Connector Type: 4-Pole Flat
  • Function: Trailer wiring harness with converter
  • Vehicle End Connector: Plug-in T-Connector
  • Design: Plug and Lead
  • Compatibility: For vehicles without factory tow package

Manufacturer Information

  • Manufacturer: CURT
  • Part Number: C55325

Product Classification

  • Product Type: Trailer Hitch Wiring
  • Visibility: Visible
  • Includes Converter: Yes
  • Tow Package Requirement: No Tow Package

55325 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Tekonsha 118325 and Hopkins 40215

Installation Details C55325 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.8

39 reviews
Review sort icon
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.

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Works just like my old one. Great pric e.



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works good



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Easy to hook up. Solved the problem thanks



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Perfect fit, works great



by:

Works as expected & easy install just be sure to anchor brain box securely.



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Product is as expected and arrived in good condition on time



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Great



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Great product and was shipped and here at my home very fast. Also the follow up from company employees was great. I will buy from this company again



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Fit perfectly.



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Broderick profile picture

Broderick

10/2/2024

The harness has been working flawlessly and had extra wire incase I need to extend it or something of that nature. I have a 1996 ford ranger and it works great to tow my aluminum boat and trailer.



by:

Fit perfectly and works great.
Very
easy to install.



by:

Thank you the product we ordered was perfect and quit PVC to quickly



by:

Arrived when expected - easy installati on.



by:

Very glad I purchased this product. Factory harness hookup vs. wire splice is the WAY TO GO.



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Converter is only convenient way to hook up trailer wiring to Ford Rangers and Mazda pickup's that have a separate circuit for the turn signals. The amperage ratings for the circuits supply adequate amperage for most trailer lighting and according to the documentation there is a circuit breaker for any overload situations built into the converter. Instillation couldn't be any simpler on the Ranger. This is a replacement for another brand converter that burnt out because the circuits didn’t have the capacity for the amperage draw on my new trailer.



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Easy to install. High quality part. Thank you!



by:

Installation was a breeze. It worked gr eat!



by:

Easy peezy! Plug and play in the truest sense.

Jeff profile picture

Jeff

3/31/2025

Still functioning flawlessly over a year after installation. Will use etrailer products on my next vehicle.



by:

Excellent service, perfect fit as alw ays



by:

Perfect fit, went inline seamlessly works as good as the OEM part!



by:

It fit like it was made for it. 10 minutes to install! Great product!thank you



by:

Trailer has what I need on and easy to use website. Definitely my go to for truck and trailer needs



by:

I have purchased a number of items from etrailer. They provide excellent service at a very fair price. First place I always look. This is a very nice hitch with a well applied durable finish. Easy to install.

Towne G. profile picture

Towne G.

8/22/2023

The wiring harness has held up well. Works great. No issues.



by:

Very simple procedure to install on my 1997 Ford Ranger P/U. Unplug the connector to the tail lights, plug in the two plugs on the adapter and secure the wiring and converter. Took me longer to get my creeper and get under the back of the truck than it did to install the harness! Great shipping time as well.

Douglas profile picture

Douglas

3/4/2026

Great so far! No issues at all.


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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Is There Ground Wire of Curt Trailer Wiring Harness that Needs to Run to Frame
    Hey Larry, that's a really good question but it looks like the step about grounding a white wire on the Curt trailer wiring harness part # C55325 was left in the instructions by mistake and is something you can skip. It's a very common step for other trailer wiring harnesses so most likely it was added and noone thought twice about it!
    view full answer...
  • 4-Way Trailer Wiring Harness Recommendation for 1999 Ford Ranger
    What you need is a 4-way trailer wiring harness for your 1999 Ford Ranger. The kit you want is the T-One part # 118325 which is a confirmed fit. It installs by plugging in line with the taillights of the truck. I attached an install video for this for you to check out as well.
    view full answer...
  • Troubleshooting Turn Signals Not Working On Trailer Pulled by 1999 Ford Ranger
    The Curt # C55325, is the correct wiring harness for your 1999 Ford Ranger, and it does have a converter. Your trucks turn signals are separate from the brake light circuit on your Ranger. There could also be a ground problem. The taillights ground through the mounting studs on the trailer. Check to see that there is no dirt or corrosion that could cause a bad ground. Next, check the ground at the trailer connector. If you find no ground problems, you will need to check the wiring all...
    view full answer...
  • 1996 Ford Ranger Trailer Wiring Harness Installation
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55325 is as you stated designed to fit your Ford Ranger, so it will handle getting wet from puddles and rain. What it is not designed for is submersion, so you will be fine with your mounting location. This system does not require the ring terminal for a ground to your truck frame. It will be adequately grounded as designed.
    view full answer...
  • Troubleshooting Trailer Wiring for Fleetwood Pop-Up Trailer and 2003 Mazda B3000 Pickup
    A potential cause for your issue is a weak ground connection. Trace the white ground wire from your 4-pole back to where it attaches to the vehicle frame. This ground must be secured to a clean and rust-free spot on the frame. If necessary sand off the rust/dirt from that grounding point and reattach the white ground wire or relocate it a new spot. If this does not correct the problem then I suggest you next test your existing 4-pole trailer connector on your Mazda to confirm it is functioning....
    view full answer...
  • Wiring Harness for 1994 Ford Ranger
    I can't tell you specifically how a wiring harness you purchased from a competitor will install. The harnesses we offer for a 1994 Ford Ranger, the T-One Vehicle Wiring Harness # 118325, Curt T-Connector # C55325 and Hopkins Plug-In Simple Vehicle Wiring Harness # 40215 are all extraordinarily easy plug-in connectors. What I can offer you are general guidelines on how to splice in a 4-flat. What you will need in order to do this are the Cordless Circuit Tester # PTW2979 as well as at least...
    view full answer...
  • Is There an Under-Dash Brake Controller Connection Port on the 2005 Mazda B3000 DS Pickup
    An under-dash quick-connect brake controller port is not offered by Mazda on their smaller pickups, so your brake controller will require a hard wire installation. You will use the # ETBC7 brake controller installation kit that you referenced. A video and article on installing this kit are included for you. If your truck has a 7-way already you can instead use kit # 5506. If your truck does not already have a 4-pole flat trailer connector at the rear bumper you will also need a wiring...
    view full answer...
  • Trailer Wiring Harness Recommendation for a 1999 Ford Ranger
    Yes, the Curt Wiring Harness part # C55325 that you referenced would be the correct trailer wiring harness for your 1999 Ford Ranger that does not have the tow package wiring. I attached installation instructions for this harness for you to check out as well.
    view full answer...

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


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Andy C
Installed by:
Andy C

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