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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
2008 Dodge Sprinter
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CURT

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

Part Number: C55550
28 Reviews | 12 Questions
In Stock
$38.57
Retail:$62.99
You Save: 39%
 Custom Fit Vehicle Wiring
Not Confirmed to Fit

2008 Dodge Sprinter

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curt custom fit vehicle wiring trailer hitch end connector t-connector harness with 4-pole flat
curt custom fit vehicle wiring trailer hitch end connector
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curt custom fit vehicle wiring 4 flat plug-in c55550

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. 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 C55550 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 (28)
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CURT Custom Fit Vehicle Wiring - C55550

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-way flat connector powers trailer lights for safe towing.
  • Plug-and-Play Install: T-connector plugs into factory ports—no cutting or splicing needed.
  • Convert for More Capability: Can be upgraded to a 7-way setup using adapter part # ETBC7.
  • Protects Vehicle Wiring: Built-in converter keeps trailer shorts from damaging circuits.
  • Clean, Secure Connection: Mounts behind rear bumper for a tidy, out-of-the-way setup.

Features to know about

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

Wiring for trailer lights can be a hassle, but this Curt T-Connector makes it easy. It plugs directly into existing vehicle wiring behind the rear bumper to create a 4-pole flat trailer connector—no cutting, no splicing. The plug-and-play setup keeps the wiring neat and reliable for towing right away.

Covers the Basics for Towing: 4-Flat Trailer Connector

The 4-flat connector supplies the standard lighting signals your trailer needs—running lights, turn signals, and brake lights. It’s the go-to setup for smaller and midsize trailers, giving you the essentials for safe, legal towing.

Ready for Upgrades: Base Harness for 7-Way Conversion

If you plan to tow a trailer with electric brakes or need a charge line, this harness sets you up for that next step. You can convert the 4-flat to a full 7-way using an adapter like the ETBC7 kit, which also supports adding a brake controller such as the Curt TriFlex. It’s an easy way to expand your towing setup when your needs grow.

Protects Connections from Dirt and Moisture: Sealed and Grease-Ready Terminals

Keeping electrical connections clean and dry helps prevent corrosion and signal loss. Applying dielectric grease (like part #11755) to the terminals adds an extra layer of protection, keeping moisture out so your trailer lights stay working trip after trip.

Specs

Electrical and Connector Specifications

  • Connector type: 4-Pole Flat Trailer Connector
  • Product group: Trailer Hitch Wiring
  • Connection style: Plug-In
  • Connector location: Vehicle End
  • Converter included: Yes
  • Tow package compatibility: No Tow Package

Comparison image showing multiple Curt T-Connector vehicle wiring harnesses with labeled parts and connectors for different models, displaying plug types and wire layouts side by side.


55550 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Hopkins HM11143985

Installation Details C55550 Installation instructions

This Product Fits The Following Vehicles






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Customer Satisfaction Score:

Ratings & Reviews

4.8

28 reviews
5 Stars
(25)
4 Stars
(1)
3 Stars
(1)
2 Stars
(0)
1 Star
(1)
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by:
Can always count on E Trailer to have the correct parts & shipping is fast. Thanks
by:
Perfect fit, clean install. Quick shipping. Thanks
by:
2006 Kia Sorento
Worked perfectly, took about 45 minutes to complete the hookup Thanks again for your help.
by:
2006 Kia Sorento
Installation quick and easy.
The folks at e- trailer, sell quality parts and accessories for your towing needs. Will be back for future purchases. Excellent customer service and quick shipping.
by:
I've never been disappointed with any product from etrailer.com. They are my Go To company for all of my trailer hitch needs.
by:
Received exactly as promised, fit perfectly snd installed easily!
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by:
2006 Kia Sorento
I ordered my trailer hitch and wiring harness on Monday afternoon it arrived Wednesday afternoon fit perfect I couldn't ask for anything more. I would recommend etrailers to anybody call Hally.
by:
2005 Kia Sorento
easiest install ever. just pop off the top of the car trailer towing electrical package and plug in the new one.
by:
Suzuki Reno
I was pleasantly surprised when I went to install the KIA trailer harness. It only took a few minutes and I was going. The delivery time was way faster than I expected. Thank you etrailer.
Gary J from Reno NV
by:
Great product works great and very affordable… I have already recommended etrailer.com to my friends. Thank you
by:
Great harness it literally was plug n play.
It works great and if you need a factory harness go nowhere else but here because you will get exactly what you need and want here
by:
Works exactly as intended, very satisfied with ease of installation and operation. Took less than two minutes to install and haul.
by:
No issues at all with the wire harness
by:
2003 Kia Sorento
Wrong item
Mike L. profile picture
Etrailer Expert

Mike L.

5/1/2026

Sorry that happened James. I'll get that taken care of for you....

by:
2004 Kia Sorento
The Part snapped right into place and it is like having the original. Hooked my trailer up and all worked well.
by:
installation took about 15 minutes. everything needed was included. good company to deal with.
by:
Plug and play just as advertised.
by:
It took more time removing the plastic cap then to install.
by:
Earl profile picture

Earl

2/7/2023

It works like it is supposed to.

by:
2005 Kia Sorento
Product fit perfect and install was easy
by:
2005 Kia Sorento
yes and thanks
by:
Great fit.
by:
2006 Kia Sorento
Easy install, great!!
by:
2006 Kia Sorento
Could us better stick pads
by:
25
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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?
  • Trailer Wiring Recommendation for 2006 Kia Sorento EX
    Hey Billy, the correct trailer wiring harness you need for your 2006 Kia Sorento is the Curt part # C55550 which uses the quick connect harness you found on your frame. Do you have a hitch already?
    view full answer...
  • Recommended Trailer Hitch And Wiring For 2005 Kia Sorento
    The trailer hitch I recommend for your 2005 Sorento is the Draw-Tite Max-Frame, part # 75516. This is a Class lll hitch and it has a 2-inch receiver opening. This is a bolt-on installation and requires no welding or drilling for installation. I did some research on your Kia and found on page 5-33 that the towing capacity of your vehicle is 3,500-lbs total if you have brakes on the trailer. If you plan on doing some towing you might be interested in etrailer ball mount kit # 989900. It...
    view full answer...
    Image 1 for
  • Recommended Trailer Wiring Harness For 2005 Kia Sorento
    The trailer wire harness I recommend for your 2005 Sorento is the Curt T-Connector, part # C55550. This harness plugs into the vehicle wiring behind the rear bumper to give you a 4-way trailer connector. There is no cutting or splicing into the vehicle wiring. I have attached a link to an installation video for this harness on a 2005 Sorento you can check out. When working with electrical connectors I recommend using dielectric grease like part # 11755. This keeps dirt and moisture out...
    view full answer...
  • Where Does Curt Wiring Harness Install on a 2008 Kia Sorento with Factory Tow Package
    The Curt Trailer Wiring Harness, part # C55550, is actually not a confirmed fit for your 2008 Kia Sorento. It fits models from 2003 to 2006. The correct harness for your 2008 model is part # C56332 as long as you have the factory tow package. I've linked a video of it being instled on a 2014. The connection point is behind the rear bumper, on the driver's side. Once you've made that connection insert the included 10-amp fuse into the fuse holder to complete the install. If you don't...
    view full answer...
  • 4-Pole Trailer Wiring Harness for 2008 Sorento Without Factory Tow Package
    Curt T-Connector 4-Pole Vehicle Wiring Harness # C55550 fits the 2003 through 2006 models years of the Kia Sorento but for your 2008 Sorento that does NOT have the factory tow package instead you will use kit # C59496. An install video is linked for you. This kit includes all parts needed to install a 4-pole harness that will provide basic trailer lighting signals and at the same time protect the vehicle from any risk of damage from short-circuits in a trailer's wiring. If your 2008 Sorento...
    view full answer...
  • Hardwiring a Brake Controller on a 2006 Kia Sorento with Tow Package
    To install the Tekonsha P2 Brake Controller, # 90885, on your 2006 Kia Sorento, you will need a 7 and 4 way Installation Kit, # ETBC7. You will also need Curt Custom Fit Vehicle Wiring, # C55550, if you do not already have a 4-Flat connection at the rear of the vehicle. The 2006 Kia Sorento is not set up for a plug and play installation. Installation is fairly simple. Start with the Curt Custom Fit Vehicle Wiring, # C55550. If you have a 4-Way already, you can skip this step. Installation...
    view full answer...
  • How To Install a 7-Way Trailer Connector and Trailer Brake Controller on a 2006 Kia Sorento
    In order to install a seven way trailer connector and brake controller on a 2006 Kia Sorento you'll need to start with the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # C55550. This can then be converted to a seven way using the 4 to 7-Way with 4-Way Trailer Connector Adapter part # ETBC7 which also has everything you need to install an electric trailer brake controller like the Curt TriFlex Trailer Brake Controller part # C24VV.
    view full answer...
  • Will Installing Curt Class III # C13513 Interfere with Spare Tire on 2006 Kia Sorento
    The presence of the hitch will prevent the spare tire from dropping straight downward while it is being lowered. While lowering the spare, you will need to push forward on it until it clears the hitch cross tube, at which point it will drop free. We have the same situation on my wifes Kia Sedona van, and I can tell you from experience that it is not difficult to get the spare off of the vehicle. The procedure will just be a little different than you are used to. If you were planning on...
    view full answer...
  • Does Trailer Taillight Converter # C55550 Need Direct Power from Battery
    The extra wire you refer to is almost certainly a power wire that provided a direct power feed from the battery to the original converter. The Curt # C55550 which would be a fit for your 2003 Sorento, doesn't need an extra power wire. It will draw the necessary power through the taillight circuits and as long as your trailer has pretty minimal lighting (such as what would typically be found on a small utility or enclosed trailer), the fact that there's no independent power wire shouldn't...
    view full answer...
  • More Reliable Trailer Wiring Harness Recommendation for 2013 Kia Sorento
    It's not an ideal solution, but the best one would be to remove the Curt install harness part # C55550 when not in use. Since most likely you won't be towing when it's snowing you might just plug it in as you need it and then remove it if you don't think you'll be towing for a while.
    view full answer...
  • Will the Curt C55550 Fit a 2009 Kia Sorento?
    The 2009 Kia Sorento will actually take the Curt # C56332. This will plug directly into the 2 ports on the rear driver side of the vehicle. I included an install we did on a 2014 Sorento for reference. The # C55550 is designed to fit a Kia Sorento from 2003 to 2006.
    view full answer...
  • Exhaust and Spare Tire Interference with Hitch Install on 2005 Kia Sorento
    I searched our customer reviews on the hitches available for the 2005 Kia Sorento and wasn't able to find any reported occurrences the exhaust rattling against the hitch for that vehicle. Hitch rattle can occur, because most vehicles use exhaust hangers and isolators that are flexible and allow the exhaust to move around a bit. If this movement allows with hitch too close to the hitch, this flexibility allows you to gently bend some of the exhaust hangers to allow for more space between...
    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 Jeff D
Installed by:
Jeff D
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

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