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CURT

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

Part Number: C55528

42 Reviews | 6 Questions

In Stock

$60.76

Not Confirmed to Fit

2011 Open Range Roamer Fifth Wheel

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curt custom fit vehicle wiring end connector 4 flat c55528

curt custom fit vehicle wiring 4 flat plug-in t-connector harness with 4-pole trailer connector

curt custom fit vehicle wiring end connector 4 flat

curt custom fit vehicle wiring trailer hitch plug-in

curt custom fit vehicle wiring end connector plug-in c55528

curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector

curt custom fit vehicle wiring 4 flat plug-in c55528

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Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C55528 Review

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SCHEDULE AN INSTALLATION

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 C55528 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 (42)
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CURT Custom Fit Vehicle Wiring - C55528

Highlights

Custom Fit for Your Vehicle: Works with your vehicle's wiring
Tow-Ready Setup: 4-way flat connector powers trailer turn, brake, and tail lights.
Plug-and-Play Install: T-Connector hooks into factory wiring—no splicing required.
No Battery Wire Needed: Works without running a power lead to the vehicle battery.
Reliable Signal Match: Built-in converter correctly syncs vehicle and trailer lighting.
Clear Wire ID: Red for stop, green for right turn, yellow for left turn simplifies hookup.

Features to know about

Installs Fast Without Extra Power Wiring: Simple Plug-In Connection

Some wiring kits need a separate power wire run up to the battery, but this one doesn’t. The Curt T-Connector plugs straight into the vehicle’s existing tail light circuits, so there’s no extra wire routing or splicing required. It’s a clean plug-and-play setup that’s ready to go once the connectors are in place.

Keeps Trailer Lights Working Right: Built-In Converter Box

This harness includes a converter that matches the vehicle’s separate signal and brake lights to the trailer’s combined system. The red wire handles the stop light circuit, green is right turn, and yellow is left turn. That built-in logic keeps your trailer lights flashing in sync with your vehicle every time you turn, brake, or drive at night.

Reliable 4-Flat Output: Standard Trailer Connection

At the back, the harness ends in a 4-pole flat connector that gives you running lights, turn signals, and brake lights. It’s the standard hookup for most small utility trailers, campers, and boat trailers. Just plug in and you’re connected.

Troubleshoots Easily When Needed: Clear Color Coding and Test-Friendly Design

If a trailer light stops working, testing this harness is simple. The color-coded wires and accessible 4-way plug make it easy to check each circuit with a standard tester. Whether you’re tracing a bad ground or verifying voltage at the pins, this harness helps you pinpoint issues fast so you can get back on the road safely.

Specs

Electrical Specifications

Connector type: 4-Pole Flat Trailer Connector
Harness type: T-Connector Vehicle Wiring Harness
Wiring method: Plug-In
Converter: Included
Vehicle compatibility: No Tow Package required
Wire color functions (input side of converter box): Red – stop light circuit; Green – right turn; Yellow – left turn
Battery connection: Does not require a wire run to the positive post of the vehicle battery

Comparison image showing several Curt trailer wiring harness connectors with labeled callouts identifying each connector type for vehicle-to-trailer electrical connection reference.

55528 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Tekonsha 118397 and Hopkins HM43815

Installation Details C55528 Installation instructions

This Product Fits The Following Vehicles

2005 - 2009 Hyundai Tucson
2005 - 2009 Hyundai Tucson

Customer Satisfaction Score:

96% were satisfied with this product

4% of customers were not satisfied

Defective

4% of customers were not satisfied

Defective

4.6

42 reviews

5 Stars		(33)
4 Stars		(5)
3 Stars		(3)
2 Stars		(0)
1 Star		(1)

by: Warren 06/08/2026

2007 Hyundai Tucson

Perfect fit

by: Jerry 11/01/2024 One Year Later

2005 hyundai Tucson

Needed this for a 2005 Hynudai Tucson. Great discussion and fast order. The shipping was quick, and although the shipper manhandled the box, all the contents were well packed and no damage. The wiring harness was fairly straighforward. Just take a few minutes to think about not only the routing, but possible pinch points. There was a little excess length. Do not cut that in case repairs are needed later. Just loop and tie wrap out of the way. i pull my trailer often and i've never had and issue with the harness or trailer electricals thanks to etrailer.com!!

by: DJW 08/11/2019

2005 Hyundai Tucson

Lots of frustration involved in getting this to work properly. Trailer turn signals/brake lights/emergency flashers worked very intermittently. One side or the other would work or not at all, rarely did both sides work at the same time. Parking lights worked fine. All of the trailer lights worked fine when connected to another vehicle. Long story shortened - I ended up replacing trailer turn/brake/flasher bulbs (1157) with LED bulbs and the problem was resolved. Note that the vehicle lights worked properly during the trouble shooting.

by: Chad 11/15/2014

2007 Hyundai Tucson

The harness itself is great. All the parts were there and everything works so far. The issue is the attention to detail with the directions. This is installed on a 2007 Tuscan. The directions are not bad, just not detailed enough for a good installation. First, there are three screws to remove for the lights, not two. Second, it is not easy at all to "feed the wire up through the bumper". You need a stick or string to slide down through, tie or tape the wires to it, then pull it through the bumper. Third, there is nothing showing you how to keep it safe from melting on the exhaust pipes for both sides. I am a professional handyman, so it was not difficult for me to take care of the issues. I just think it needs more details to help others. Again, everything works fine, the wires are solid, and I would buy again for other vehicles.

by: Shay 07/07/2023 One Year Later

We bought a trailer hitch and wiring kit for our Haundi Tucsan and it is wonderful. built well, very sturdy. Easy install. We use it all of the time either with a little trailer or our bike racks. Good product and a fair price.

by: Cory A 04/10/2015

2008 Hyundai Tucson

The wiring harness was very easy to install. I did however use 10 or 12 extra cable ties to make sure it was secured well especially up above the exhaust tips.

The directions were clear, and easy to understand when it came to outlining which holes under each tail light you were supposed to snake the wires through that was a big help.

The pricing was rock bottom, and the harness appear to very high quality..I will definitely purchase any other trailer or towing products I need from Etrailer.com

by: Ronnie W 03/08/2018

2005 Hyundai Tucson

I recently purchased this hitch and related wiring accessories from etrailer for my 05 Hyundai Tucson. Following the included installation instructions I found the hitch easy to install. Total install time including the wiring adapter was approximately 1.5 hours without rushing.

by: Stephen H. 12/31/2016

2009 Hyundai Tucson

Everything worked out great on my trailer hitch kit. The item and wiring harness were well priced ($50 less than next best competitor) and accurately described and fit/installed easily with all necessary parts. Definitely will keep them in mind for future orders!

by: MJ 06/20/2015

2006 Hyundai Tucson

Well made. Very simple installation. Very fast shipping and excellent customer service. Got an e mail confirmation when it was delivered. Very happy with this purchase.

by: Joe H 08/25/2016

2005 Hyundai Tucson

best wiring kit available! ive bought a few others that have bad quality wring and connections that wernt water tight. this is heavy duty and should last for many years. the shipping was very fast as well!

by: T.C. 10/05/2023

Click to Enlarge

by: Vivona, 02/28/2019 One Year Later

The kit was easy to install, but has been giving issues with turn signals blinking real fast or sometimes not at all. I swapped out the bulbs in the trailer for LEDs which pull less current and that has seemed to fix the issue.

by: Christopher 04/02/2020

Worked great. Ashame I had to remove bumper to hide wires. Thank you for your quick shipping.

by: MCW 10/03/2017

2005 Hyundai Tucson

Great harness ,great price ,fast shipping ,super easy install........ what else could you ask for?

by: Johnny B. 08/14/2017 One Year Later

2008 Hyundai Tucson

Quick easy install. Everything fit perfectly. Great price too! Thanks etrailer!

by: Jason 07/29/2019

2008 Hyundai Tucson

Quick and easy to install once I figured out how to remove the tail lights.

by: Ryan Keator 01/14/2017

2006 Hyundai Tucson

great harness, definitely worth the money, simple plug and play design, very happy.

by: David 03/10/2015

2005 Hyundai Tucson

Very easy connecting and installing. Hardest part was running wires from tail lights. Metal coat hanger helped

by: Wyatt O. 10/13/2015

2006 Hyundai Tucson

Simple install... follow the instructions, they are complete.

by: Jack 07/19/2020

I watched an etrailer video on YouTube. Was able to complete the install in about half an hour with no problem.

by: Raleigh W. 07/01/2014

2014 Subaru Impreza

Works great. we had ordered the plug for our application and did not have enough time to return or reorder. but with snap splices made it work. Still ease to install. Works great. Great service.

by: Carlos 04/18/2020

2005 Hyundai Tucson

It fit on my Hyundai Tucson 2005, Very easy installation

by: Tom M 08/18/2013

2007 Hyundai Tucson

Perfect fit & easy to install. I'll never use a splice kit again.

by: Fred S. 12/03/2016

Didn't put it on yet, but everything seems real good. Thank You e trailer. Jena

by: Rusty1 06/17/2020 One Year Later

Very good wiring. Fit exactly . Very reasonable cost.

Rusty1 One Year Later

6/18/2021

Great - Wiring has stoood up during all types of inclement weather.

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

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

Troubleshooting Intermittent Turn Signals On 2005 Hyundai Tucson
It is possible that a controller like the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55528 has gone bad. To test it, I recommend using a circuit tester like # PTW2993 to see the function at your 4-way when the trailer is not connected. This will help you determine if it is vehicle wiring or trailer wiring causing the issue. If the issue is with the vehicle side, you will need to replace the unit. If the 4-way is good on your vehicle test, then I...
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Which Wire of Curt Trailer Wiring # C55528 Is for Stoplight Circuit
On the input side of the converter box of the # C55528 there is a diagram that shows what each of the wire colors represents. The red wire is the stop light circuit, green is right turn, and yellow is left turn.
view full answer...
Troubleshooting No Turn or Brake Signals On Trailer Wiring
First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean and...
view full answer...
Recommended Trailer Hitch Receiver and Ball Mount for Rise Needed Without Bumper Fascia Contact
For your 2005 Hyundai Tucson, I recommend the Curt Trailer Hitch Receiver # 13526. This will have a 12-1/4 inch measurement to the inside top of the receiver opening and from the hitch pin hole to the outer most part of the bumper will be 5-3/4 inches. For your ball mount, I recommend the MaxxTow Adjustable-Height Ball Mount # MT70068 to give you the bumper clearance and then recommend hitch ball # 63845 for a 2 inch ball or # 63847 for a 2-5/16 inch ball. Then use # e98880 for keyed...
view full answer...
Does the Curt Wiring Harness # C55528 Need a Wire Run to the Vehicle Battery
I checked your order notes and it looks like you ordered the Curt Wiring Harness part # C55528 that has been confirmed to fit your 2008 Hyundai Tucson and does NOT require a wire be run to the positive post of the vehicle battery like some harnesses do. So long story short, you aren't missing any components to your wiring kit and the harness should work well as long as you install it per the instructions that I attached to the right.
view full answer...
Trailer Wiring Harness for a 2007 Hyundai Tucson
On some vehicles the specific trim level might matter. But in this case, for your 2007 Hyundai Tucson and a trailer wiring harness, it does not matter. You can use Curt harness # C55528 no matter what trim level you have. I have included a link to the installation instructions for you to view.
view full answer...

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

Info for this part was:

Edited by:

Leah B

Written by:

Lindsey S

Installed by:

Jeff D

Expert Research:

Jameson C

Expert Research:

Rachael H

Updated by:

Wilson B

Updated by:

Kristina F

Updated by:

Isabelle B

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