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

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C55774 - No Converter Curt Custom Fit Vehicle Wiring
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  • 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 vehicle 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 (89)
  • Q & A (120)
  • Videos (5)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C55774

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.


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
  • Made 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

This Product Fits The Following Vehicles

2013 - 2016 GMC Acadia

2017 - 2017 GMC Acadia Limited

2011 - 2016 Ford Explorer

2009 - 2014 Dodge Ram Pickup 1500 with factory 7-Way

2010 - 2014 Dodge Ram Pickup 2500 and 3500 Pickup with factory 7-Way

2001 - 2003 Ford F-150 Flareside or SuperCrew with factory 7-Way

2000 - 2000 Ford F-150 Flareside with factory 7-Way

1997 - 1999 Ford F-150 and F-250 Light Duty Flareside with factory 7-Way

2004 - 2004 Ford F-150 Heritage Series Flareside with factory 7-Way

2000 - 2000 GMC Yukon New Body Style - with factory 7-Way

2001 - 2003 Ford F-150 non-Flareside or non-SuperCrew with factory 7-Way

2000 - 2000 Ford F-150 non-Flareside with factory 7-Way

1997 - 1999 Ford F-150 and F-250 Light Duty non-Flareside with factory 7-Way

2004 - 2004 Ford F-150 Heritage Series non-Flareside with factory 7-Way

2010 - 2019 Ram 1500 with factory 7-Way

2019 - 2019 Ram 1500 Classic with factory 7-Way

2010 - 2019 Ram 2500 with factory 7-Way

2010 - 2019 Ram 3500 with factory 7-Way

2011 - 2019 Toyota 4Runner with factory 7-Way

2005 - 2010 Saab 9-7X with factory 7-Way

2005 - 2014 Nissan Armada with factory 7-Way

2003 - 2008 Isuzu Ascender with factory 7-Way

2007 - 2009 Chrysler Aspen with factory 7-Way

2002 - 2013 Chevrolet Avalanche with factory 7-Way

2003 - 2005 Lincoln Aviator with factory 7-Way

2009 - 2011 Kia Borrego with factory 7-Way

2002 - 2004 Oldsmobile Bravada with factory 7-Way

2004 - 2019 GMC Canyon with factory 7-Way

2004 - 2019 Chevrolet Colorado with factory 7-Way

2002 - 2009 GMC Envoy with factory 7-Way

See All Vehicle Fits

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   (89 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:

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
by:

Great products,pricing and delivery!!! 451767



- C55774
by:
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



- C55774
by:

Easy install. Complete setup worked gr eat. 544125



- C55774
by:

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
by:
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

- C55774
by:
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
by:

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
by:
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
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



- C55774
by:

Great everything was awesome 559206



- C55774
by:

I love etrailer there the best and really great prices and all the staff are awesome you will always have my business product was delivered quick and great quality 552401



- C55774
by:
2018 Jeep Grand Cherokee

Secure the small bolts to the hitch frame, plug wiring in and it was ready to go (except the dealer had to program the wiring; this charge is a dealer scam) 563816



- C55774
by:
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



- C55774
by:
2016 Jeep Grand Cherokee

etrailer promotes a great product in the wiring harness for the Jeep Grand Cherokee. The video was a big help. The harness will plug right into the existing factory harness and plug but you must use a narrow flat head screwdriver to insert at top of onboard plug unit and gently pry up the catch then the plastic filler plug will release and can be pulled out by hand. The new harness plug will fit into the Jeep factory harness perfectly. But, again the job is not that easy as you will need to visit a Jeep dealer to program the onboard computer to work the trailer lights. The only criticism on this unit is that the company ships it without two bolts to mount the plug bracket onto the hitch. I searched my shop an hour for two bolts to mount the bracket. What a cheap lousy wa to ship an otherwise first class wire harness. Good Luck. 371369



- C55774
by:
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



- C55774
by:
2008 Ford F-250 and F-350 Super Duty

Great products and customer service. Will use them again 475531



- C55774
by:
2006 Ford F-250 and F-350 Super Duty

product connected easily but after installation I was unable to connect my 7 pole round from my bass boat. Very puzzling at first until I noticed the blades in the new connector are wider than the one in my old connector. I did not know that there are two different blades sizes made in 7pole round harnesses. Had to change the trailer end connector to make it work. 515222



- C55774
by:

My part was ordered from Ashley and she was very helpful to find the right fitment for my vehicle. The part was shipped next day air and arrived as promised. Thanks to the helpful staff at ETRAILER.COM Thanks again 552276



- C55774
by:
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

- C55774
by:
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



- C55774
by:
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:
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



- C55774
by:
2017 Nissan Titan

My order was held up for wiring that they had no idea when they would get it. I had to call to find this out after not receiving my order on time. UPS destroyed the box which delayed my order another day. I need to call to find that out also. I had to go with another company for the wiring that got to me before the hitch. All in all I will not buy from etrailer again 422547



- C55774
by:
2002 Chevrolet Tahoe

Exactly what i needed and was extremely easy to install 522899



- C55774
by:
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
by:

Great product. Just as described. 575702



- C55774
by:

Looks like it will work. Haven’t installed yet. 569695



- 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

- C55774
by:

Wish it had a pigtail about 6" longer. I had to pull back so much cable to slide it over it was insane. If they weren't so stingy on the pigtail cable from the plug I would have had no problem. They need to remember, that not everyone wants the plug to sit on the passenger side of the truck. 629691



- C55774
by:

Thought I might save some time and purchase a ready made harness to swap from the factory 4 pin to a 7 pin. Shame the plug didn’t match the Ford connector. Had to go back to square one, cut off both connectors and wire directly. 628440


Comments

This trailer connector is intended as a replacement for vehicles already equipped with a 7-way trailer connector. Its meant to attach to the factory harness that plugs into the rear of the original trailer connector.

-- Mike L - 04/17/2019

53067

- C55774
by:

Unfortunately this product wasn’t the part that I needed Nobody’s fault but my own Crystal was very pleasant and helpful, also full of information New harness on its way Thank you 627747



- C55774
by:

Works like it should wish bracket was more of a factory install 625562



- C55774
by:

Quality harness and great price great job etrailer 615601



- C55774
by:

Excellent fit! Works as it should. Than ks 615538



- C55774
by:

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
by:

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
by:

Straight forward installation. No issues at all with connectors mating up with the trucks wiring. Recommend that dielectric grease is used on all connections. The only downside for me was that the mounting hardware was missing. Luckily we installed it at my sons' garage and the needed bolts and nuts were right at hand. 612116



- C55774
by:

Fast shipping. Exactly as stated. Thanks 611394



- C55774
by:

Fit ok but was opened when i got it and the wires were too short and had to reroute my trucks wire harness. But worked good after that. 609951



- C55774
by:

Easy plug and play, for my application I forgot to order the adapter plate mentioned in the video, I assumed it came with this but it didn’t, which was my fault. But no splicing just crawl under your suv on the driver side and plug it in. Simple 602179



- C55774
by:

Trailer plug looks great. Mounted mine beside license plate in factory location. 599075



- C55774
by:
2018 Ford F-150

Product is great. The problem is the website said it would fit my f150 and it doesn’t so idk why it said it would fit my truck. 596623


Comments

This particular connector is designed for vehicles that are already equipped with the factory 7-way trailer connector.

-- Mike L - 01/11/2019

48447

- C55774
by:

Perfect Fit!!!!! 596608



- C55774
by:
2018 Nissan Titan

Just great 595614



- C55774
by:
2006 Chevrolet Silverado

Everything I needed for a clean install. Excellent product for my '06 Duramax. Back to hauling with a solid connection to my trailer. Thanks for the great service. 595080



- C55774
by:
2007 Ford F-350, 450, and 550 Cab and Chassis

Thank you so much E trailer !!! it’s alwawy nice to have a company that have the right components at the right time . 594724



- C55774
by:

Plugged right in and looks good. 593953



- C55774
by:

Fits directly into factory harness. Looks great! Easy install, less than 5 minutes. 593710


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Ask the Experts about this Curt Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?


  • How to Add a Trailer Connector to a 2018 Jeep Grand Cherokee
  • I do not believe all 2018 Jeep Grand Cherokees came with a factory trailer connector. In order to add one you will want to first look under the vehicle's rear bumper near the spare tire for a USCAR car plug which I have attached a photo of for you. The plug may be taped to an existing wiring harness. If you have this plug then you can use part # C55384 to add a 4-way trailer connector or part # C55774 to add a 4 and 7-way trailer connector. I have attached install videos of both harnesses...
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  • Recommended Trailer Wiring Harness and Other Parts to Tow a Trailer With a 2017 Audi Q7
  • It sounds like you're looking for a trailer wiring harness for your 2017 Audi Q7. If the Audi came with the factory tow package but doesn't have the connector you can use the Curt # C55774 which will provide you with a 4-way and 7-way connector. This harness plugs into the tow package wiring harness which will be under the rear of the vehicle. If you don't have the tow package I recommend the ZCI Harness # 119250KIT. This installs by clamping to the Audi's existing wiring without...
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  • Recommended Trailer Wiring Harness for a 2017 Nissan Armada
  • In order to add a trailer wiring harness to your 2017 Nissan Armada, I recommend using the Curt T-Connector Vehicle Wiring Harness part # C55774. This is a plug and play option that will provide you with both 4 and 7-way trailer connection points in addition to a mounting bracket. I called my contact at Curt to confirm this. If you don't already have a bracket on your hitch to mount the trailer connector bracket to then you can use part # 18140.
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  • Parts Needed to Tow a Trailer with a 2017 Ford Transit T150 Van
  • For your 2017 Ford Transit T150 I suggest the Draw-Tite # 75912. This is a 2 inch, Class III trailer hitch receiver confirmed to fit your van. All of the hardware is included and no drilling is required for installation. If your Transit does not have the factory tow package you can use # 118643 for a 4-way trailer connector or # 22114 for a 7-way. They both install by plugging in behind the tail lights. Use # C55774 for both a 4-way and 7-way in one part if the Transit has the...
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  • Recommended Trailer Hitch for a 2019 Ram 1500
  • For the New Body Style of the 2019 Ram 1500 you need the Draw-Tite # 41913 as it is currently the only trailer hitch that has been confirmed to fit. This is a strong Class V trailer hitch which exceeds the max towing rating of your Ram 1500. Even though this is the case it is worth noting that this will not increase the weight rating of your pickup so that will be the limiting factor. You should already have a 7-Way on your Ram, but you may consider swapping out your current connection...
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  • Parts Needed to Install 7-Way on 2018 Ford Transit T250 without Tow Package
  • The Curt 7-Way part # C55774 that you referenced is a fit for your 2018 Ford Transit T250 IF it has the factory tow package and the round connector for a 7-way present at the rear of the vehicle. It's possible you don't have the factory tow package and the connector you are looking for just isn't there. I attached a picture of what the connector you'd need looks like. This would require a different route for installing the trailer wiring. Instead you'd need to start with a 4-way like the...
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  • 4-Pole Wiring for 2018 Ford F-150
  • We have 4-pole wiring harnesses for the 2018 Ford F-150 such as Curt # C56110 which is a direct OEM replacement. This item and the similar Hopkins part # HM11140735 plugs in at the rear of the truck with a rectangular plug. Please refer to the linked photo. If instead your truck has a round U.S Car type connector you can use Curt # C55774 which includes both 4-pole and 7-way type connectors on one product.
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  • Why Can't the Factory Bumper be Used for Towing After an Aftermarket Hitch is Installed
  • The Draw-Tite Max-Frame Trailer Hitch Receiver part # 76004 is a confirmed fit for your 2017 Chevrolet Colorado and will work well for you. The Draw-Tite Max-Frame is a Class IV trailer hitch with a 2" receiver tube opening. The hitch has a gross trailer weight (GTW) rating of 8,000 lb and tongue weight (TW) rating of 800 lbs though you will need to verify your vehicle's GTW and TW ratings as the lower of the two will be your limiting factor. I have attached an installation video of this...
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  • Does Fascia on 2018 Jeep Grand Cherokee Altitude Need to be Altered to Install Curt # C13182
  • When we installed the Curt Trailer Hitch Receiver # C13182 on a 2018 Jeep Grand Cherokee we did not have to trim any fascia (see attached photo and video). I am not sure if the trim on an Altitude is much different than the Laredo but I can say that it doesn't look like you will need to. You can check out the attached installation video to confirm. If you have the tow package then you can just install the Curt T-Connector # C55774 which gives you a 7-Way and a 4-Way connector, but if...
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  • Trailer Wiring Recommendation For 2017 Jeep Grand Cherokee
  • The Pollak 7-Way part # HM40975-11933 is a fit for your 2017 Jeep Grand Cherokee and would plug into a square connector at the rear of the vehicle. Most likely it's the connector you found already based on what you described. You might test the pins of the connector you found with a circuit tester like part # PTW2993. If they are active when vehicle taillight signals are on then this will work. If instead you do not have the tow package wiring complete the T-one kit part # 118727 would...
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  • Recommended 7-Way and 4-Way Trailer Wiring Connector Compatible with Factory Harness
  • For your 2002 Ford F-250, the wiring harness you are seeking with both 7-way and 4-way connectors is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors # C55774 or the Reese # 74682. Either of these will connect to your factory wiring harness to give you both of the trailer connectors you seek.
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  • Recommended Towing Setup for a 2017 Jeep Grand Cherokee Without Towing Package
  • The best towing setup for your 2017 Jeep Grand Cherokee is the Draw-Tite Trailer Hitch # 75699, the Curt T-Connector # C55774, and the Redarc Tow-Pro Elite # 331-EBRH-ACCV2. The reason I the Draw-Tite # 75699 is the best is because it features a hidden crosstube design for a clean look as well as a built-in bracket for mounting your wiring connector. If you happen to have the diesel model then you would need to go with Draw-Tite # 75713 instead. This doesn't have a hidden crosstube but...
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  • 7-Way Wiring Harness for 2002 Ford F-350 Super Duty with Square Connector
  • It sounds like your truck will use a 7-way harness like Hopkins # 40167 which uses connectors like what you describe. Please refer to the linked photo that shows those connectors. This includes a 7-way socket that plugs into the included round U.S. Car connector on the other end of the 10-foot harness.
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  • Recommended 7-Way Trailer Wiring Harness For 2011 Ford Ranger With Factory 4-Way
  • If you have a 7-way trailer connector on your trailer then it probably has brakes and you will need a brake controller in your 2011 Ranger. We have everything you need to get this done. First, you will need part # ETBC7. This will plug into your 4-way and with additional wiring will give you a working 4-way and 7-way trailer connector. For a brake controller I recommend the Prodigy P2, part # 90885. This is our most popular because it is easy to install and operate. I have attached...
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Info for this part was:

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

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