Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors

Item # C55774

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Custom Fit Vehicle Wiring C55774 - 4 Flat,7 Blade - Curt
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Quickly and easily install a 7-way and a 4-way trailer connector on your with this custom harness. Connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C55774 or order online at etrailer.com. Free expert support on all Curt products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (141)
  • Q & A (166)
  • Videos (5)
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- Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • 7 Blade
  • No Converter

Quickly and easily install a 7-way and a 4-way trailer connector on your with this custom harness. Connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required.


Features:

  • Provides both a 7-way RV-style and a 4-pole flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole and 6-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point behind rear bumper
    • Plug in connector
  • Includes mounting bracket and hardware
  • Comes with protective covers for connectors
  • Assembled in the USA
  • Limited 1-year warranty


Installation

This custom-fit connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper, on the driver's side.


Once installation is complete, the connectors will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket is included to keep the connectors secure.


It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 7-pole and 4-pole connectors - to help prevent corrosion.



55774 Curt T-Connector - OE Multi-Socket Upgrade



C55774 Installation InstructionsInstallation Details C55774 Installation instructions

California residents: click here


Video of Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C55774 Review


Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors - C55774

Average Customer Rating:  4.6 out of 5 stars   (141 Customer Reviews)

Quickly and easily install a 7-way and a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required.

- C55774
by:

Great everything was awesome 559206



- C55774
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Great products,pricing and delivery!!! 451767



- C55774
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2012 Chevrolet Avalanche

Got this to replace a damaged OEM connector on 2012 Avalanche. The replacement was plug-and-play, almost. The mounting bracket included with the kit was not used. I drilled appropriate holes through the OEM bracket and installed the new connector. Just disconnect the old connector and re-connect the new. Simple job. Connectors fit OEM harness. 612659



- C55774
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2015 Jeep Grand Cherokee

Super easy, very nice! Great engineering, couldn’t have been any easier! The girls at etrailer are super friendly and very helpful! Great prices and quick shipping, too!! 495215


Comments

Great. No problems.

Mike - 04/13/2019

52876

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2002 Chevrolet Suburban

I like the way it fit up on my vehicle took some work to get receptacle mounted but worked out great 495988



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2003 GMC Yukon XL

I am having a problem with the install of the three Curt trailer components I purchased. I intentionally bought all of the same brand assuming that they would work together. The problem is that the Curt wiring harness (part# C55774) is too long and rigid. When the 7-pin connector is installed in the bracket that comes with it, it measure 5 inches until the black wire protective sleeve bends (to go under the hitch receiver frame). The no-drill bracket (part# C57202) is supposed to attach the harness bracket to the hitch. But it is only 6.5" long, and the hitch tube is 3" wide. So with the bracket attached to the hitch, there is only 3.5" of space left to mount the harness bracket so that the screw holes line up. I am disappointed that this is the case, especially as I called etrailer to check that the parts I was ordering would work together. It looks like I will have to discard C57202 and drill two holes into the bottom of the hitch and mount the harness bracket directly. This is what I wanted to avoid - having to drill holes. 577673


Comments

The 7-way bracket that comes with the wiring harness part # C55774 is designed to be installed with the wiring harness bracket hanging below the no drill bracket part # C57202. Since you are worried about the loose wiring I would recommend using some wire loom such as part # 459075-1 to protect your wiring and zip tie any slack with zip ties part # DW05726-25. I know this is not the option you wanted but I feel it is better than drilling into the hitch.

-- Heather A - 10/26/2018

45090

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2004 Cadillac Escalade

Product just like it said it does, delivery just took long but is free delivery so is good, packed box came like bit out from the people delivered but localy everything works good 430179



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2002 Ford Excursion

My 2002 Ford Excursion 7.3L diesel had the original factory hitch and wiring harness. The quality and heft of the Curt T-Connector is impressive. I bet I get years of use without problems. 398239



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2016 Jeep Grand Cherokee

Got all the parts put together and took Vehicle to Jeep Dealer to have the computer updated. All is good thanks to etrailer and videos provided on you web site. Thanks to you and person who referred me to your web site. 404216



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2003 Jeep Grand Cherokee

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package. Pros... Product was as advertised. Seems to be good quality. Installation, fit, and function are good so far. Cons... It should be stated in the product info that after the Wiring Harness connector is installed, the car's factory tow wire harness option will have to be activated by the dealer . This was an additional $125. for my Jeep Grand Cherokee. 409017



- C55774
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This fit into the factory opening on the bumper perfectly however I chose not to use the 4 pin and just taped it up on the main wire and decided to go with an adapter when I need to tow a 4 in set up . It was easy to install and looks great . 458839



- C55774
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2018 Nissan Titan

Great product. Slightly short for a Nissan Titan 2018 since the 7 way plug is on the passenger side. Very easy to install and fast delivery I love etrailer. Fast reliable products and services. 637312



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2011 Dodge Ram Pickup

The only reason I won't give 5 stars is because it says it would fit my truck so I assumed it would go into the factory hole in bumper and it doesn't also no hardware comes for mounting the bracket but it does come with hardware to mount harness to bracket just not bracket to truck but the harness plugged right in there was plenty of wire so place bracket where I wanted shipping was fast and I believe etrailers is great with customer service if you had questions or maybe ordered wrong part or just to help make sure you are ordering the right part 460040



- C55774
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If you have multiple trailers that either use a 4-way flat or 7-pin round connector and get tried of having to use an adapter go with this setup. I've had one on my other truck for a couple years and no problems with 'em thus far. You can technically use the old existing mount on the receiver hitch itself but the 4-way will dangle unless you ziptie it up. 456039



- C55774
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1997 Chevrolet C/K Series Pickup

I ordered the part that your website said would fit my 2004F 250 super duty. It is the wrong plug that I was given 640932


Comments

This plug is designed as a replacement 7-way connector on F250 models that were factory equipped with the 7-way. The existing connector should be unplugged at the rear where it connects to the vehicle wiring harness, then replaced with this part.

-- Mike L - 05/15/2019

55298

- C55774
by:

Easy install. Complete setup worked gr eat. 544125



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2005 GMC Sierra

Amazing!! So I bought an 05 GMC Sierra 1/2 ton that had the tow mode on the shift lever, but no wiring for towing. I started youtubing how to get tow wiring installed and found out that the factory wire was indeed near the rear bumper, capped and located just above the spare tire which made it hard to see until you knew where to look. Once you remove it from the bed frame, there is enough wire to reach down to the bumper. You then connect round connector to round receiver and it all works. My hitch receiver already had a strong mounting plate that this harness fit into, so it was just a matter of drill the 4 holes and attaching with the provided nuts and bolts. This is an extremely well made harness that is worth the price and it also arrived within a few days of order. 593800



- C55774
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2016 Jeep Grand Cherokee

The custom hitch for the 2016 Jeep Grand Cherokee fit extremely well and it was just like the online video on your site. The wiring Harness worked out very easily and I mounted the bracket to the subpanel under the bumper area but above the hitch so it did not stick down low- Looks great. The test unit worked extremely well also. I was very pleased with everything from the call I made to the representative to his follow-up e-mail and with the useful and helpful videos on your site. Vey pleased 3rd time I have ordered from this site and have been extremely pleased every time. 376725



- C55774
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2002 Chevrolet Tahoe

Exactly what i needed and was extremely easy to install 522899



- C55774
by:

This is a good product, but it was not plug and play for my make and model of vehicle. I had to have a plug wired into my vehicle before I was able to use this product. 633784


Comments

This wiring harness would only be a fit for your 2001 Silverado if it was equipped with the factory 7-way trailer connector.

-- Mike L - 04/23/2019

54338

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2008 Ford F-250 and F-350 Super Duty

Great products and customer service. Will use them again 475531



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2018 Jeep Grand Cherokee

Came as expected can’t really review yet waiting for the time to install! Sucks they didn’t send the bracket hardware with this unit 521799


Comments

The Curt 7-way trailer connector # C55774 provides the hardware to attach the connector to the mounting bracket, but not the bolts used to fasten the bracket to the vehicle. Curt chose not to provide that hardware because the hardware needed would depend greatly upon the surface the connector is mounted to.

-- Mike L - 06/15/2018

39802

- C55774
by:

Hitch does what it needs to do. Finish is ok. Starting some rust even though we live in upstate SC. I coated with Fluid Film to try to keep it nice. I ordered the wiring to and plugged into factory harness. No lights worked. Started reading online elsewhere that it had to be flashed at dealership to unlock that feature. Dealership looked at me funny and never got a straight answer. 546305



- C55774
by:

This is such an awesome product, I'm so happy I came across your website when searching for a replacement! What an upgrade to what I had. Thanks so much!!! 398717



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1999 Ford F-250 and F-350 Super Duty

Top Quality! Fast Delivery! Have ordered several items from etrailer and have never been disappointed! 576135



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Nissan Titan

The product is well made but here's the problem. It's too short to mount on the Drawtite hitch bracket when used on a Nissan Titan.. the only option i could find was to order an extension that required me to cut off the factory plug and splice it to the factory wiring which I did not want to do. the solution I came up with was to cut the wiring on the harness and splice in some wire of the same gauge. why not come up with a plug n play extension male on one end and female on the other about one foot long. 613367



- C55774
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2002 Chevrolet Silverado

You shouldn't have to drill into a new hitch to place this. Make 2 standard location holes, if they want to put it somewhere else let them drill it. 718948



- C55774
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Excellent service! Exellent product! Definitely will buy here again! 718933



- C55774
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still works great even after a year 716723



- C55774
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fast service and excellent product. Very please, thank you Vance 713821



- C55774
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Product very good gaulty and fit a discriped. Recommend products to anyone. 713715



- C55774
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2018 Nissan Titan

The product works great and seems really well made. But it's not ideal for a 2018 Nissan Titan if you're using the Draw Tite Hitch. The factory wiring is on the passenger side of the car and the mount for the receptical is on the Driver's side. I extended the wires 13" to make it work. 713361



- C55774
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2004 GMC Sierra

Product received in Alaska in less than a week from the order time. Product also met all my expectations and fit my vehicle as the description said it would. Tested after installation and everything worked as expected. Great product, great service. Hard combination to beat these days. Thank you, Harry 713284



- C55774
by:

The original trailer plug wasn’t going to work with the hitch I purchased this was recommended on web site for the hitch I purchased it was a very simple change over all wiring and plugs matched the unit mounted securely to the plate on hitch plugged traikeyinbwhen complete and everything worked fine great product 711627



- C55774
by:

Only negative I had was two of the bolts where wrong but a trip to the hardware store and I was good go. Hitch fit perfect 710931



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Jeep

Easy install Jeep needed to have computer software updated at Dealer ship 100.00 ETrailer was up front on that 707906



- C55774
by:

Does not work on my 2002 F-350 with a factory tow package. The unit is not long enough to reach the factory wiring harness located on the frame directly above where the unit mounts on the step bumper. Customer service was great but it just doesn't work on my truck. 705730



- C55774
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2008 GMC Sierra

As always, everything I order from etrailer is exactly as described. Fast delivery and minimal effort to install. Well done, etrailer....:D 705498



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2017 Jeep Grand Cherokee

Perfect fit with outstanding customer s ervice 700135



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2018 Jeep Grand Cherokee

Just what I ordered. Fit with no problem. Just beware You pay for shipping and if it's not what you want you have to pay to ship it back. Won't do business with this company anymore. 698952



- C55774
by:

Just received the hitch...looks like it will be an easy, perfect fit. I chose to order online rather than call and etrailer made that process very simple. My order arrived quickly and complete. I’m a repeat customer and due to their great customer service, excellent advice, fast shipping and large inventory I will continue to be. 700539



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2018 Ford F-150

great product 700473



- C55774
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2003 Chevrolet Silverado

Perfect for my application. Bought a complete towing package all at once....so easy!! 698484



- C55774
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good product 698460



- C55774
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2019 Chevrolet Silverado 1500

Easy to install. Looking good on vehic le 697846



- C55774
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Perfect fit 697839



- C55774
by:

is ok was told it would fit like the stock one i ordered but they were out of, but it did not i had to drill holes and modify the bracket to hold the 4 way plug but it will be ok 695630



- C55774
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2012 Chevrolet Silverado

I recently received a Custom Fit 2" Class III Curt Trailer Hitch Receiver for my 2012 Chevy Silverado from etrailer.com. This product is everything and more the website promised! I am very impressed with the quality of the unit and the price was very competitive. Additionally, installation was a breeze as promised. The brackets lined up perfectly with holes in the truck's frame rails and all needed hardware was supplied and worked perfectly. I have never installed a hitch before and I accomplished the task in a little under an hour start to finish! etrailer.com delivered as promised and I will surely be a returning customer. Thank you! 696908



- C55774
by:

Speedy delivery and easy to install with just one person, fits like a glove. 696657



- C55774
by:

I ordered a hitch and a 7-way / 4 flat plug for my 2005 Chevrolet Silverado. I chose free shipping and it arrived in 2 days. Both items were exact fit, I did the install myself with the help of a jack. The install took me about 2.5 hours because I had a problem with my wiring. The Tconnector was there but wires were cut. Overall, very satisfied with results. Etrailer you have a customer for life, I will highly recommend etrailer to anybody that needs a hitch. I'm including a picture and you can see my 7 way plug to right of license plate in the bumper. (Old spare tire crank hole) 690406


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Ask the Experts about this Curt Custom Fit Vehicle Wiring

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    view full answer...

  • Trailer Wiring Recommendation for 2016 Ford Transit T350
  • You would see a round connector near the bumper of your 2016 Ford Transit T350 that the part # C55774 would plug into if you had the factory wiring. Most likely you do not though and would need the trailer wiring harness part # 118722 which is a custom fit and would work well. I attached an install video for you to check out too.
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  • Recommended Wiring for 2016 Ford F-150 to Have 7-Way Trailer Connector
  • If you already have the round wiring connector on your 2016 Ford F-150, then you simply need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors # C55774. If you do not have the round connector and instead have the rectangular connector, then you will need the Replacement OEM Wiring Harness for Ford F-150 # C56110 to give you a 4-way and then add the 7-way wiring kit for brake controller # ETBC7 and connect the brake wire to the blue wire...
    view full answer...


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Info for this part was:

Expert Research:
Michael L
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video by:
Andrew K
Video by:
Joshua S
Video by:
Michael B
Written by:
Lindsey S
Installed by:
Jeff D
Video Edited:
Jacob T
Video Edited:
Chris R
Test Fit:
Brent H
Test Fit:
Shane H
Test Fit:
David F
Updated by:
Kristina F
Updated by:
Isabelle B

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