bing tracking image
  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 7 Round - Blade
  4. Trailer Hitch Wiring
  5. Factory Tow Package
  6. Vehicle End Connector
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
CURT

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector

Part Number: C55243
In Stock
$53.26
Retail:$77.95
You Save: 32%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C55243 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 for Factory Tow Package - 7-Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (158)
  • Q & A (0)
  • Photos

CURT Custom Fit Vehicle Wiring - C55243

Highlights

  • Easy installation: Plug directly into OEM tow package without cutting or splicing.
  • Custom fit design: Suitable for vehicles with a factory tow package, ensuring compatibility.
  • 7-Way blade connector: Ensures optimal connection for powering trailer signal lights.
  • Built-in protective cover: Shields the 7-way connector from damage and corrosion.
  • Includes necessary relays: Activates all functions in the wiring harness setup.
  • 30" overall length: Provides ample reach for securing along the vehicle frame rail.

Features to know about

Quick and Dummy-Proof Install: No Cutting, Splicing, or Tapping Needed

Installing wiring can be a daunting task, especially when you have to cut, splice, or tap into existing wires. This Curt T-Connector Vehicle Wiring Harness is a game-changer - you just plug it directly into your vehicle's OEM tow package port. It's custom-fit, meaning no guesswork about compatibility, and comes with a protective cover for the 7-way connector to keep everything reliable and safe from the elements. With its plug-and-play design, it makes setting up your towing system as simple as can be.

Reliable Power Supply: 7-Way RV-Style Connector

When you're towing, ensuring your trailer's signal lights get power from your vehicle is crucial. This 7-way, blade-style connector guarantees your trailer's lights will be powered efficiently. Designed specifically for vehicles with factory tow packages, it ensures a seamless connection every time. Its sturdy design and protective cover mean it will stand the test of time, keeping your trailer's lights bright and fully functional.

Designed for a Perfect Fit: Custom-Fit Solution

Custom fit is not just a luxury; it's a necessity for seamless towing. This harness is tailored for a precise fit along the driver’s-side frame rail of your vehicle. It’s an ideal solution for those frustrating moments when you find universal parts just don't work. With this harness, you can rely on a snug and secure fit every single time, without any adjustments or alterations needed.

Corrosion-Free Connections: Use of Protective Grease

Electrical connections can easily deteriorate due to exposure to the elements. Protect your vehicle's connections by using a small amount of grease on all electrical contact points, both on your automobile and the 7-pole connector. This simple step wards off corrosion, ensuring that your connection remains strong even in humid or wet conditions, increasing the durability, reliability, and lifespan of your wiring harness.

Comprehensive Installation: Includes Necessary Relays

Don't let overlooked components leave your trailer lights powerless. Included with this wiring harness are the necessary relays to activate the lighting functions. This means everything you need for a successful installation is already in the box, simplifying your set-up process and ensuring everything is up and running with minimal hassle.

Perfect Length for a Secure Set-Up: 30-Inch Overall Length

With an overall length of 30 inches and a wire loom of 24 inches, this harness is designed to provide ample length for a smooth installation process. It ensures that once installed, the 7-way connector is conveniently stowed beneath your vehicle, near the trailer hitch, reducing any unsightly wiring and maintaining a sleek look.

Specs

Dimensions

  • Overall length: 30"
  • Wire loom length: 24"

Warranty

  • Limited warranty: 1-year

55243 CURT T-Connector - OE Replacement 7-Way

Installation Details C55243 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

158 reviews
Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.

by:
2002 Ford F-250 Super Duty

Etrailer.com did a great job for me. I was trying to find a replacement for the 7-way bumper trailer outlet for my 2002 Ford F250. The first outlet would have fit, but there was damage in the last foot of the factory wiring harness I had to connect to. After several emails with Julie H. in customer service, Etrailer did the research necessary to find an alternate outlet that had the correct factory harness plug and provided new wiring back the the rail of the truck bed. Now Ive mounted this one on the tailgate post instead of the bumper which will protect it from the damage that ruined the original. Thank you again Julie!



by:

worked as it should



by:

Works as described. Amazingly simple installation. Still completely satisfied.



by:
2000 Ford F-250 and F-350 Super Duty

These harnesses are great have had a hard time finding ones with factory ends on them. These guys had just what i was looking for piece of cake to install just route wires mount and plug in very clean install



by:
1999 Ford F-250 and F-350 Super Duty

There were not many options available for what I was lookin king for. Older vehicle and looking for a plug and play plug. Included was a harness (which will plug into the newer style plug) and the relays + fuses (which I did not need). There was not a mount and the plugs base had a different layout of holes than my existing mount. This product should work and is what was described but not exactly what I needed.

Eric profile picture

Eric

8/28/2019

Working well



by:

Easy to install truck wiring harness. Plug and play and done. Strong springs on the harness plug door that hold the trailer plug in very well too.

Shawn profile picture

Shawn

9/11/2021

Great. Its still functioning perfectly.

Shawn profile picture

Shawn

9/11/2021

Great. Its still functioning perfectly.



by:

Works great!



by:

I purchased the Curt Triflex C51440 controller, C51322 adapter, and C55243 wiring harness together to correct the hacked up wiring that was on my 2000 F250SD after having intermittent brake issues on my 18' trailer. Due to the slipshod nature of the wiring that was on the truck, I felt it wise to start fresh. After cutting out all of the spliced in mess, installing the Triflex unit was extremely simple and made for a clean install. The C55243 harness was a simple plug and play. Keep in mind the harness does not include a bracket to mount the 7 way plug to the bumper (I already had one, you may not). The most difficult part of the install (after removing the old stuff) was finding the auxiliary distribution block to install the relays in. This varies by year, make, model and a little searching on the Google resulted in a few helpful photos/diagrams. The products seem to be good quality, shipping was prompt, and I received a follow up email from etrailer to confirm that my product had arrived and my needs had been met. Very impressed to this point. I have not towed with the setup yet, but the brake controller indicator display indicates everything is functioning correctly.



by:

Removed old plug unit from back bumper, replacement unit fit to exact existing screw holes. Harness was just an unplug and plug in for the new unit.
Took me less than 30 min to replace the old 7-pin plug. I regret not getting the 4-pin plug in option that was available,, factory wired in with the Harness



by:
2001 Ford F-350 Super Duty

Replaced a wore out and cut and spliced older connection with this new plug and play one. As usual etrailer hooked me up with exactly what I needed. From the pictures you can see the old one with a wiring nest and the new one looking good and doing good. The new one plugged right in and with the exception of having to use a couple of the old mounting bolts it looks perfect. I’m really happy with this purchase as I have been with my other etrailer purchases.



by:

It worked just like I hoped it would, it's a direct plug in to the OEM harness and it looks good too!

Clb profile picture

Clb

3/13/2015

So far so good, everything works just like its supposed to.



by:

I ordered a new wire harness and electric brake controller from trailer and was extremely pleased with the product and the level of service I received. I ordered it on a Sunday regular mail and hot an email 2 days later letting me know they upgraded mail delivery from 5 to 7 days to 5 day delivery no charge. I have 2 horse trailer's and have lots of friends who have the same and have recommend this site. I am also impressed with the wire diagram's and videos.keep it up guys your doing awesome.



by:

Easy installation and factory connection is the way to go. Now all my trailers have the same connector whether goose neck or bumper pull.



by:

It worked perfect and was exactly what i needed.
No issues with connections.



by:

All parts fit perfectly. Suzzane T. of e-trailer was awesome . We got disconnected on the phone and she was the one who called me back to make sure that my order was complete and I was satisfied. Great Service!



by:

I do a lot of product reviews. If at any time in the future you want a product review, just let me know, and you can send me a product to try and write a review. It is sort of a hobby of mind. I love doing reviews, and trying new products. Just in case you are interested, my address is:

Jerry W Mann
Product review
12900 Raleigh Road
Benson, NC 27504-6812

(919) 749-5290

The Wiring Harness that you sent to me is of great quality. Actually better than OEM. The wires are of a heavier gauge, and the plug fits like a charm. Everything works as it should with no issues what so ever. Thanks for having a great product.



by:
1999 Ford F-250 and F-350 Super Duty

Great product. Would have liked some extra slack aside from what came with. I cut and put junction box under box on frame. Feeding gooseneck, headache rack, and bumper 7/4 way. Works as described.



by:
2000 Ford F-250 and F-350 Super Duty

Received my new brake 7-way plug and harness in 2-days. Kit came with (2) 30 amp fuses and (2) relays which I did not expect. Very pleased with etrailer. I needed and anode for my 5TH wheel and did not realize they stock this item as well. I will use etrailer again in the future!!!



by:

I was a bit disappointed that in your description it says 7pin with 4pin, so I was expecting the 7pin fixed base with a 4pin flexible connector with it. I would have returned it if the shipping would have been cheaper.



by:
2003 Ford F-250 Super Duty

just like in the picture, even though it was not listed for my 2003 f250 had to take a chance, the ones listed for my truck had a round pig tail connector that would not have worked, took a while to get it due to not having my complete order,very good product, the fuses and relays didn't need my truck was already set up,



by:
Ford

Thank all of you from customer service to delivery. Quality products, quality service, and the prices were great. Ford wanted twice the price for the T-connector and over $60 for a $4 bracket. I'll be sure to order from your site in the future. Thanks!



by:

Works great! However, it does NOT include the bracket if you need to mount it to your drop down hitch, unlike a few of the other brands out there.



by:

Wow! What can i say about the outstanding customer service and outstanding followup by this company. I would highly recommend this company to anyone who needs trailer parts or trailer associates. Roger R was warm, friendly and very engaged in handling my request and the delivery was right on time!!! He followed up with a call to tell me the shipment had arrive in Dallas the day before it was to land. Thank you Roger!!!
Sincerely

Michael
Argyle Texas



by:
1999 Ford F-250 and F-350 Super Duty

Delivery was lighting fast, product was excellent quality and fit.

Kevin S. profile picture

Kevin S.

2/5/2018

Works fine…great quality of product and great service by your company. Plan to buy any future needs through your company….



by:
2000 Ford F-250 and F-350 Super Duty

I only order from e-trailer as their quality is second to none. I mis-ordered a part recently and had the pleasure of working with Jennifer. Jennifer was friendly, knowledgable and a pleasure to work with.


25
158
Show More Reviews

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

  • Replacement 7-Way For 1999 Ford F-350 Super Duty With Square Connector
    Definitely a smart idea to check, and we do have a replacement 7-way connector for your 1999 Ford F-350 with the square connector to plug into your factory wiring. The exact part you need is the following: - Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # C55243
    view full answer...
  • 7-Way OEM Replacement Trailer Wiring Harness for a 1999 Ford F-250 Super Duty
    You can use the Curt T-Connector Wiring Harness, # C55243, or the Tow Ready Replacement 7-Way Harness, # 118243, on your 1999 Ford F-250 Super Duty. These are basically the same item for your truck made by different manufacturers. If the price point of the Curt harness is more appealing to you, then there is no reason why you cannot use that harness. There is one thing you will want to keep in mind when installing either of these harnesses, do not forget to install the relays and fuses....
    view full answer...
  • Recommended 7-Way Connector for a 1999 Ford F-350 w/a Rectangular Plug
    Hey Robert! Thank you so much for that information! We do have a 7-way connect that plugs into a rectangular one for your 1999 Ford F-350. It is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package item # C55243. To add a gooseneck plug to your truck bed you'll want the Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug item # HM40157. If you have any additional questions feel free to throw them into the comment box below and I'll be happy...
    view full answer...
  • Available OEM Trailer Wiring Harness Kits for 1999 Ford F-250
    Hopkins Plug-In Simple Wiring Harness # HM40155 has a 4-pole flat trailer connector and is intended as a replacement for a factory 4-pole on your 1999 Ford F-250. We do have other wiring kits for your truck depending on how it was equipped from the factory; all kits are shown on the linked page. For example, parts # 118243 and # C55243 are 7-way kits that include fuses and relays to activate the additional circuits for the trailer.
    view full answer...
  • Replacement 7-Way Connector For 2008 Ford F-250 With Towing Package
    We do offer replacement connectors that will work with your OEM wiring harness on your 2008 Ford F-250. If you just need the replacement 7-pole connector, I recommend part # PK11893. This is an exact replacement for the OEM connector on your truck. If you find the vehicle side of the harness was damages, I recommend part # C55242. This plugs directly into OEM tow package wiring harness and requires no cutting or splicing of wires. To get a 6-pole connector on the rear of your truck...
    view full answer...
  • Trailer Wiring For My 1999 Ford F-350 Super Duty With OEM Factory Tow Package And My 5th Wheel
    The first thing you will need is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector, part # C55243. This will plug directly into your OEM tow package port. Once that is in place you will need the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires, part # ETBC7L, this is what will add the 4-way and 7-way connection to your 1999 Ford F-350 Super Duty. In addition, I found a 5th wheel/gooseneck 90 degree wiring harness....
    view full answer...
  • Where Does Curt T-Connector Vehicle Wiring Harness Install on a 1999 Ford Super Duty
    T-Connector is a generic term that is applied to any trailer wiring harness that is plug and play. Models of the 1999 Ford Super Duty that came with a factory 4-Way would use the connector # C55243 to just plug in where the 4-Way plugs in.
    view full answer...
  • Recommended 7-Way Trailer Wiring for 2000 Ford F-250 7.3 Diesel
    For your 2000 F-250 Diesel the trailer wiring you need depends on what your truck came with. If you have the factory 4-way then you would simply use the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # C55243 to give you the functioning 7-way. You will also need a brake controller and harness if you want all the functions. I've linked the page to your options. If you didn't have the factory wiring at all, then you would instead use the 4-Pole...
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2000 Ford Excursion
    The Curt trailer wiring harness # C55243 doesn't fit but I can recommend the parts to add a 7-Way trailer connector to your 2000 Ford Excursion. First, if the Excursion has a 4-Way flat connector now then you will just need # ETBC7 to add the 7-Way, keep the 4-Way, and have the wiring and accessories to wiring in a brake controller. If your Excursion does not have any trailer connector at all then you will first need to install a 4-Way using # 118344 and then you can install the ETBC7....
    view full answer...
  • Replacement 4 and 7-Way Trailer Connector for a 2000 Ford F-350
    You can use the Hopkins 4/7-Way connector # HM48470. All you will need to do is attach the wires from the old connector in the same places on the back of this connector then mount it where you want it. No other wiring harnesses are needed. The replacement 7-Ways we have for a 2000 Ford F-350 that also have the rectangular plug do not have a built-in 4-Way. We have # C55243 and # 118243. You could use one of these and then use an adapter, # HM47570. If the truck came with the factory 7-Way...
    view full answer...
  • Do I Need to Install Fuses and Relays on a 2000 Ford F-250 for Towing
    Yes, there are relays and fuses that will need to be installed on a 2000 Ford F-250 if not already present in order to activate the circuits for the brake controller and 7-way trailer connector. In order to check this you simply need take a look at the power distribution center. If there are fuses in both the Trailer Tow Electric Brake and Trailer Tow Battery slots as well as relays in both the Trailer Tow Backup Lamp Relay and the Trailer Tow Battery Charge Relay slots then you are good...
    view full answer...
  • What is the Towing Capacity of a 1999 Ford F-350 with V10 Engine
    The maximum conventional towing capacity of your 1999 Ford F-350 is 5,000 lbs at the bumper and 10,000 lbs at the trailer hitch. If you are looking to tow under 5,000 lbs then all you would need is a hitch ball like the 2" Hitch Ball part # 40038 or the 2-5/16" Hitch Ball part # C40007. However, if you looking to tow in excess of 5,000 lbs then you would need a frame mount trailer hitch like the Curt Trailer Hitch Receiver part # C15316 which is a custom fit that provides you with a 2"...
    view full answer...
  • Recommended 7-Pole Wiring Harness for 2004 Ford F-350 with Factory Tow Package
    I do have a wiring solution for you, but the Curt T-Connector Vehicle Wiring Harness # C55243 you referenced is not compatible with your truck. It is designed for certain models of 1999-2001 Ford Super Duty trucks. For your 2004 Ford F-350, you can use the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # C55774, as long as your vehicle is equipped with a factory 7-way connector. If your F-350 is equipped with a factory 4-flat instead, you can use Curt T-Connector # C55265...
    view full answer...
    Image 1 for
  • Fifth Wheel 7-Way Recommendation for a 2016 Ford F-350 for Bed of Truck
    What I would actually recommend for you is the part # 41157. This is a harness designed for exactly what you are looking for. It will plug in line with the 7-way you have at the rear of your vehicle and will give you a second one for you to install up near the wheel well for the fifth wheel. I attached an install video for you to check out as well.
    view full answer...
  • Recommended Wiring Harness for 7-Way on 2004 Ford F-250
    I reached out to Curt and they said they do not have anything like that to fit anything past 2001 due to wire patents. So to get your 7-way, you will need to first get your 4-way connector. If you have the factory 4 way option, then you can use # C55265. If you don't have the factory wiring harness you will need # C56032. Once you have the 4-way flat, you can then use # ETBC7 to get the wiring connections, and circuit breakers for 7-way connection. If you want to add a brake controller...
    view full answer...
  • Replacement 7-Way Connector for 2000 Ford F-250 Super Duty
    If your 2000 Ford F-250 Super Duty came with a factory 4-Way, then the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # C55243 referenced in your question is indeed the correct harness to install a 7-Way. The wiring from the back of the trailer connector to the port that will connect to your truck is not currently available as a separate item. This kit will include the 7-Way trailer connector. This will plug right into the factory wiring harness located beneath the rear...
    view full answer...
  • Converting 4/6-Way Factory Connector on 1999 Ford F-350 SD to a 7-Way RV-Style Connector
    You identified the correct harness to convert your 1999 Ford F-350 SD from a 4/6-way trailer connector to the more common RV-style 7-way blade type. Part # C55243 will plug in to a square OEM connector along the driver's-side frame rail. You may want to use metal 7-way mounting bracket # PK12711U to simplify installation. The linked photo will show you the type of connector you are looking for under the frame.
    view full answer...
    Image 1 for
  • Replacement 7-Way Wiring Harness for 2002 Ford F-350
    The plug on the # C55243 you were looking at will technically fit the connector on your 2002 Ford F-350. The problem is that beginning in 2002 they changed the pins so the connector fits but it won't work with models after 2001. Nobody made a specific aftermarket solution for this but there is a way to replace it with the Hopkins # 40167. The Hopkins wiring harness is designed to add 5th wheel/gooseneck wiring to the truck bed by many people have used it to replaced the OEM wiring harness....
    view full answer...
  • Troubleshooting Ground Wire of Trailer 7-Way Wanting to Pull Out
    I'd have to see what type of connection your 7-way makes, but if it's a set screw you'll want to make sure you are getting plenty of wire into the slot and then tighten it down so that it can't easily slip out. Also make sure you don't have trailer wiring that's just too short and wants to pull itself out when you make tight turns as the cable starts pulling.
    view full answer...
  • Replacement 7-Way for a 2002 Ford F-350, 450, and 550 Cab and Chassis
    The pin locations for the Curt T-Connector # C55243 are different from your connector because the 55243 fits a 1999 - 2001 Ford F-250 and F-350 Super Duty with factory 4-flat. Since you input your vehicle info as a 2002 Ford F-350, 450, and 550 Cab and Chassis the only replacement options we have look like the Curt # C55774 which plugs into the US Car Connector which would be on the other end of your wiring harness. If just the 7-Way on your vehicle is needing to be replaced then the 55774...
    view full answer...
  • Installing A 7-Way On A 2003 Ford F-350 Super Duty
    Hey Edward, The factory connector for a 2003 Ford F-350 7-way socket should be round so it's likely that you're looking at a different wire harness. Could you send me some pictures and I can take a look? It's also possible that your F-350 wasn't setup with a factory wire harness and you'll instead need to first install a 4-pole connector # C56032 and then install a hardwired 7-way socket # ETBC7 instead of the factory harness plug-in version # C55774 that you ordered.
    view full answer...
  • Recommended Trailer Hitch Options for 1995 Ford F350
    We have many different hitches compatible with your truck. The best choice for you will depend on what you're wanting to tow. For lighter duty towing, I'd recommend the Class III hitch, part # 75038. The hitch has a 5000 lb towing/500 lb tongue weight capacity. For a heavier duty Class IV, the Curt # 14001 with its 10000 lb towing and 1000 lb tongue weight capacity would be a good choice. For a higher capacity, B & W offers a Class V with a 2 inch by 2 inch receiver opening, part # BWHDRH25122...
    view full answer...
  • Replacement 7-Way Connector for a 2004 Ford F-350 XLT Super Duty 6.0 Diesel
    I have a 7-way wiring harness for your 2004 Ford F-350 XLT Super Duty 6.0 Diesel but the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package item # C55243 you referenced fits the 1999-2001 F-350 Super Duty. If you are just looking for an OEM replacement 7-way you will want the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors item # C55774. This harness will replace your F-350's 7-Way and add a 4-way connector. It plugs directly...
    view full answer...
  • No Power at 7-Way Charge Circuit On 1999 Ford F-250
    The relay box on your 1999 Ford F-250 is actually located in the engine compartment near the brake master cylinder. Since it sounds like you don't have power at the 7-way at all you probably need a new 30A fuse in location 16 for the trailer battery charge. The battery charge also has a relay in location 39. If you replace the fuses and still do not have power at the 7-way you most likely need to replace it. If the Ford has a factory tow package, you can replace the plug with part # C55774....
    view full answer...


< Previous
12



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 Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-800-940-8924
<