Price: $22.77

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # C55384

lowest price pledge


Our Price: $22.77

Orders above $50 qualify for Free Shipping

Select Ground or 3 Day Shipping for delivery before Christmas


In Stock
zoom in icon
zoom out icon
pop out icon replay 360 icon
horizontal rotate icon

Product Images

curt custom fit vehicle wiring 4 flat t-connector harness for factory tow package - 4-pole trailer connector
curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness for factory tow package - 4-pole connector

In Use/Installed

2015 jeep grand cherokee custom fit vehicle wiring curt no converter 4 flat in use
2015 jeep grand cherokee custom fit vehicle wiring curt no converter 4 flat c55384
2015 jeep grand cherokee custom fit vehicle wiring curt trailer hitch 4 flat c55384
2015 jeep grand cherokee custom fit vehicle wiring curt trailer hitch in use
2015 jeep grand cherokee custom fit vehicle wiring curt no converter c55384
2015 jeep grand cherokee custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness for factory tow package - 4-pole connector

Customer Photos

curt custom fit vehicle wiring trailer hitch 4 flat c55384
curt custom fit vehicle wiring trailer hitch 4 flat c55384
curt custom fit vehicle wiring trailer hitch 4 flat c55384
curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness for factory tow package - 4-pole connector
curt custom fit vehicle wiring trailer hitch 4 flat c55384

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • No Converter
Curt custom fit vehicle wiring for your are available from Installation instructions and reviews for your custom fit vehicle wiring. Expert service, and cheapest custom fit vehicle wiring price guarantee. carries a complete line of Curt products. Order your Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector part number C55384 online at or call 800-298-8924 for expert service.

Curt Custom Fit Vehicle Wiring - C55384

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


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package that has a 7-way connector
    • Retains 7-way connector functionality
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in T-connector
  • Comes with dust cap for 4-way flat connector
  • Made in the USA
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper. Simply plug the harness in-line with your existing 7-way wiring harness.

Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.

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

55384 CURT T-Connector - OE 4-Flat Upgrade

C55384 Installation InstructionsInstallation Details C55384 Installation instructions

Video of Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

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 C55384 Review

Today we're going to review part number C55384. This is the Curt 4-Way Flat T-Connector Vehicle Wiring Harness for Vehicles With a Factory Tow Package. Now, this part number is designed to fit many Dodge, GM, Nissan vehicles that have the factory tow package. What I would recommend to do is use the fit guide on our website, and this will determine if this part will fit your particular vehicle. This'll provide a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights, and again, it is designed to be used with a vehicle that has a factory tow package already. Now, usually when they include a tow package on a vehicle, lots of times they'll put a 7-way connector at the back of vehicle, so you can plug in a 7-way, so you could use this part number to actually add a 4-way at the back of the vehicle, along with that 7-way. So what you would do is go to the back of your vehicle, pull off the plug that's plugged into the back of your 7-way, the wiring harness will unplug from the back of your 7-way, plug this part of the T-connector into the back of your 7-way, plug your wiring harness into that, and then that'll add the 4-way, and you'll still be able to retain the 7-way that's on the vehicle right now. Now, the other way, is on some vehicles, they might include a factory tow package, but they won't have a 7-way at the bumper.

So what you'll need to do is look up underneath the bumper, and basically find the wiring harness where it'll end. It'll usually have a cap on it. Pull that cap off, and then what you'll want to do is go ahead and plug this into the wiring harness, take the cap that you took off, and put it on to this connector, since you won't have a 7-way on the vehicle at the time, and then this'll still go to the back of your vehicle, and you'll have a 4-way, so you can connect it to the factory tow package to give you a 4-way at the back of your vehicle. It does connect quickly, easily. There's no cutting or splicing a wire. As you can see, you just plug it in.

Now, it does come with this dust cap to be used on the 4-way. You can just attach it like that, and then put it on there, and that'll help protect that 4-way from any corrosion or damage to it. It does come with these zip ties that'll help if you need to bundle up any of this wire that might be hanging down. You can use the included zip ties. Now, I measured the length of this, and if you pull this all the way out, it's about 36" long, wiring that's included. It does come with the instructions.

It has good detailed instructions and pictures to show where to connect it. That should do it for the review on part number C55384, the Curt 4-Way Flat T-Connector Vehicle Wiring Harness for Vehicles With a Factory Tow Package. .

Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - C55384

Average Customer Rating:  4.9 out of 5 stars   (174 Customer Reviews)

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

- C55384

by: Andrew K05/27/2014

Product works great! Only took 10 minutes to install, and wasn't difficult at all. I bought this to power an LED light bar under my tailgate while still using the factory plug for towing and it works perfectly! Thanks! 132890


Product worked the whole time I had it, I sold the truck and got a different one, but I ordered another harness yesterday! Works great!

Andrew K - 05/27/2015


- C55384

by: tony s09/28/2016

talked to ashley a few days ago and she helped me with getting a trailer hitch and wiring harness for my 2015 jeep grand cherokee. awesome! quick shipping, received the hitch and harness in about 2 days. beautiful hitch, love it! for my jeep it was super quick to put on, unscrew four bolts, lift the hitch into place, replace the bolts and tighten. couldn't have been easier, perfect fit. wiring harness just had to take a cap off the vehicle connection, insert the new wiring and zip tie it down. no more than 20 minutes total to install the trailer hitch and wiring harness by myself (65 year old man!). would reorder any further items from etrailer without hesitation. super quick shipping and great friendly/helpful staff! thank-you etrailer! 301026

- C55384

by: John D07/05/2015

The T connector worked great. Hookup was a breeze, much easier than I thought it would be. Made connecting a tailgate LED light bar a snap and hid the wiring. Gave it clean finished look. 209475


Still working great.

John D - 07/04/2016


- C55384

by: Dan P07/25/2015

Great product now I can hook up my under tail gate ligt without cutting into the wiring, all plug and play. 214297


I have had this product on my truck for over a year and it still performs flawlessly

Dan P - 07/24/2016


- C55384

by: steve m smith sr06/15/2015

The complete installations took 5 minutes and was a breeze. Outstanding product for the truck and price 203460


working just perfect plus money saver

steve m - 06/14/2016


- C55384

by: jackie m.09/15/2016

Am very pleased with this product. Having a new 2015 Silverado , I wanted to put a LED light bar under the tailgate. All the light bars that I found either plugged into the trailer light plug at the hitch or had to spliced into the truck wiring ,which I did not want to do, with this harness I was able to plug everything together no problem other than the long lead that had to be folded up and hid under the truck but it sure beat cutting and/or splicing wires. would recommend this harness, have recommended this harness, to anyone like who hates to cut or splice great, should last a long time,really glad I found it. 295183

- C55384

by: Jake S09/01/2014

I'll tell you and anyone else that this product is great and it allow me to hookup my under the tailgate lite with ease. One thing every one I talk to even the dealer were I got my truck. say's cut the wires and splits in. This harness is so easy to use and only takes mintues to do. But one word of caution when you disconnect the plug from the two way adapter. Make sure you remove the (WHITE TAB LOCK) and use a small screw driver down the lock channel to release the plug. Note for the supplier to need to provide the above info with your product. Thanks for a great harness. 149455

- C55384

by: Bill V08/05/2017

I purchased the wire harness to go with my class 3 hitch for my 2017 Nissan Titan King Cab. The harness was intended to be inserted in the current harness with the factory tow package which I did not have, I just removed the cap in the end of the current harness and inserted into the open end of the new harness. The harness does not come with a hanger for the 4 pin plug so I just tie wrapped it out of the way where I could get to it easily. Very easy to install once you figure out how to release the cap by depressing the tab. Quick and simple for the average guy. 415333

- C55384

by: Edward07/08/2013

took all of 5 min to hook up 88171


with no problems and still working

Edward - 07/08/2014


- C55384

by: Nick S.01/25/2017

This is an excellent example of a well made product with excellent documentation and great packaging. It worked perfectly. And, it was here on the date promised. I used it to connect an LED light bar in a extremely clean fashion. the light bar came with a 4 connector trailer type connector. I didn't want to have the tail light bar permanently plugged into the bumper mounted plug from the outside. So, with this I was about to connect the lights with the connector hidden behind the bumper and still have full functionality of the bumper mounted connectors. 335480

- C55384

by: Larry M.03/06/2017

This is the second Curt T connector I have purchased from eTrailer among several other items over the last few years. Each product has been exactly as described and of excellent quality. The first Curt T connector was installed on a truck I sold in order to put myself into a new Tundra. This one will be used to access power for bed lights and an aux 12v power connector under a hard tonneau cover. It can also provide power for a tailgate led light bar. Cannot supply a photo with this review since it will be a few days before installation. 349289

- C55384

by: jacob S.08/06/2016

This is the only way to hook up under tailgate light. Just pug in and its done. But the folks need to provide instructions on removal of vehicle plug. I call and they showed me to instructional video and after review the white pug lock I removed needs to stay in and only raised just a little and sqwees white lock the the main pug is released. Only the video show this but did not enphize it. Other wise its a good product and my second one. So stop fooling around and buy it! 280527


Its great no problems.

jacob S - 08/06/2017


- C55384

by: Andy l.08/18/2017

Order class iii hitch and wiring harness for my 13 keep grand Cherokee . Came next day. Installed in 20 minutes. Great product. High quality and easy install Product was shrink wrapped, taped and boxed ver professionally. Website also very easy to use Would definitely recommend to anyone 422317

- C55384

by: Martin m07/22/2017

Perfect fit. Took 20 minutes to install wire harness and hitch receiver. 409353

- C55384

by: Joe R.07/15/2017

I ordered a trailer hitch, wiring harness and MaxxTow ball mount for my 2015 Ford Explorer. After viewing the rectangular wiring harness plug on my vehicle, I immediately called customer service who substituted the flat wiring harness plug for the round one ordered. The customer service associate substituted the correct wiring harness despite costing about $4.00 more. Excellent customer service and I received all parts ordered one day earlier than promised. 407555

- C55384

by: richard03/29/2013



I just ordered this for my 2007 Sierra so I can also install led light bar

-- comment by: Rick c - 05/31/2014


- C55384

by: Duane E.04/05/2017

I used this product to give me an extra dedicated 4 wire trailer connector to use for my under the tailgate lighting, leaving my original 4 wire connector free to use for my trailer. Worked great. Only took a few minutes to install. If I were installing a tailgate light bar on any truck again, I would definitely use one of these connectors. I highly recommend this product to anyone needing a 4 wire trailer connector. 363156

- C55384

by: Dave B05/30/2016

orderwas shipped as advertised - found packaging and shipping provided good delivery- actual product use was for an older model vehicle than what I have so had to return product for a refund- I have a 2017 Ford F150 Platinum with the LED package which will not accept any aftermarket products to be installed or added to the system - I still recommend etrailer products and service - GREAT customer service provided 253621

- C55384

by: Dave M07/07/2016

I have ordered from for years and never left a's time. I am at the point where I don't compare other shops online or especially locally. Their videos for installation let me know what I'm into before I take the job on. This install and wiring was the easiest ever. Factory look with a better than factory rating is a win win. Love buying from these guys! Makes my life easier. 269214

- C55384

by: Mr Estes03/27/2017

This was by far the easiest on-line order process I have ever experienced. Not only was the process simple and the deliver very quick and correct but, the phone support for my questions was the best. The staff @ etrailer has the knowledge and the skill needed for success. I will recommend etrailer to anyone who needs towing accessories. Thank you very much Kenny Estes 362267

- C55384

by: Buddy R05/04/2017

Roadmaster parts were exactly as advertised. I paid for two day shipping and was very happy with the timely manner in which the order was shipped and received. I was emailed as soon as the order was received by and tracking information was current and accurate. Parts were installed in time for our first camping trip in our new motorhome. 376105

- C55384

by: Malcolm05/30/2016

Excellent product. Fits great! It took me longer to figure out how to unhook the wiring on the truck (without break it) than it did to install this 4 wire plug-in! I will shop with your company in the future. I've build many trailers and wired them to different vehicles over my life time. These plug-in wiring products are the way to go! 253635

- C55384

by: Pat M08/28/2013

Easy to install works great shipping and communications was fantastic. Now my USMC LED light hitch cover is on the truck without an adapter. 97314

- C55384

by: DENNIS O.01/13/2017

I purchased a class 5 Curt trailer hitch from Along with a seven to four wire vehicle specific plug for my 2017 Nissan Titan. I was extremely satisfied with the price, free shipping , The quality of the product. Well packaged as to not scratch the paint .Easy to install with the help of 1 other person. 335015

- C55384

by: Bob04/29/2014

I shopped at my local parts store but could not find a simple 7 way (+ 4 pole) conversion part. This part shipped fast and took 5 minutes to hook up. It works great and I am 100 percent happy with etrailer parts and service. this was my first etrailer transaction but I won't hesitate to contact again. Bob Tucson 128126

- C55384

by: David11/20/2017

I just installed this on my 2018 Jeep Grand Cherokee Laredo. Super fast and super easy to plug in/attach. The instruction video was spot on. Note: You will have to go to the Jeep dealership to enable the towing wires in the computer. I was hoping that this would be enabled by default, but it was not. 453618

- C55384

by: stook01/16/2014

Haven't installed it yet because it is still very cold out. From the looks of your product it looks top notch and I think it will be just what I was looking for. I'm installing an LED under the tailgate tail light system and wanted my wiring hidden under the truck so this is going to work out sweet. 113998

- C55384

by: Bob H.01/14/2017

Wanted to add a led light strip to my 2001 Suburban, was ready to start splicing into the harness, when I remembered to check I've ordered from them before, so I check and found part C55384. It took all of ten minutes to install. Everything worked out great, with no splicing wires. 332556

- C55384

by: Chuck J02/08/2017

Great product, shipped quickly in great shape with good finish. Heavy duty looks good on truck. 341733

- C55384

by: Phil B.06/17/2014

I am very happy with this product and the prompt delivery. I installed it in less then 1hour including time to tie down any loose wires from the old connector that I left on the truck. The new connector worked great to provide electric service to both my truck camper and boat trailer. 135864

- C55384

by: xdfergel12/11/2014

Product is just what I needed. I have a third brake light bar on the back of my pickup and it has a 4-way connector on it. It fits perfect. This works great and there's no wires showing, it's all underneath. I didn't know they made these, but I am very satisfied with it. 164320

- C55384

by: Lou01/09/2015

Works great. I was able to get my trailer hitch cover to light up with this on my 2014 RAM 1500. I had to lower the spare tire in order to get more room to install the harness, but other than that it worked out perfectly and my Bully Horns now light up like the brakes. 168372

- C55384

by: Matt G08/28/2017

I purchase an under the tailgate bar light for my pickup truck and did not want to hardwire it into the wiring harness so I purchased the above and was able to hook up my light without cutting or splicing into the original wires it was easy to install it worked great 426174

- C55384

by: Tsgt albritton03/31/2014

I love this product!! Very easy to install!! I am an aircraft electrician and this should be easy for the average joe! Plug and play is perfect! Only thing I would add would be Vaseline to the connection to prevent corrosion !!( good to add to your car battery also) 122988

- C55384

by: James U.11/05/2016

The wiring kit fit perfectly and was the easiest part of the project. Wiring lengths were just right and the connections are weather tight. I got my moneys worth and etrailer shipped it very quickly. I'm completely satisfied with the purchase and service. 314094

- C55384

by: Bill E02/08/2017

The harness and the hitch arrived yesterday. The salesperson I spoke with, Andrew, was extremely helpful making sure I got exactly what I needed to do the job. He even sent videos to help with installation. I would recommend these guys to anyone. 339789

- C55384

by: Doug S01/24/2017

My Curt Trailer hitch and electrical harness fit my 2016 Grand Cherokee like a glove. very easy installation only took me a half hour and no cutting or drilling as per the product description. I will definitely order from here again! 335049

- C55384

by: Benny G.06/20/2016

Easy bolt up, pulls like a hitch should, also wire harness was easy hook up, bought with hitch. (Hint, make sure you have all needed relays for trailer lights in main box under hood-save frustration of feeling like you did something wrong, lol) 263065

- C55384

by: MARK V.04/04/2014

Purchased the Curt Trailer Hitch Receiver and the t-connector wiring harness for my 2012 jeep grand was fantastic and installation was a breeze. Great products and support, will definitely come back for other accessories! 123812

- C55384

by: ed10/15/2017

I am a uhaul dealer and there web site dosent show all there products I use your site to find many products I use your site is quick and easy to use I would recommend etrailer to any one doing hitches or trailer wiring or repairs 442855

- C55384

by: Joe S.07/14/2017

The item fit perfectly but it did have scratches on it. Although you will not be seeing those scratches, since they are under the truck, they were still there and pretty severe. I have not had a chance to tow anything just yet. 405740

- C55384

by: Robert Alexander06/02/2014

Item fit my 2011 Jeep Grand Cherokee perfectly. Did not have to mess with removing taillights and running wires. If your vehicle has the pre wired tow package I highly recommend using this product. Rob A. Clinton, Tn 133727

- C55384

by: Chad06/06/2016

I bought 2 one for each pickup to install aftermarket rear lights that mount below tailgate they worked awesome they simply plug into your factory harness so there's no wire splicing. Very happy and satisfied. 258298

- C55384

by: Michael04/16/2016

Fast shipping. Customer service is top notch. Directions are clear to understand. Five minutes to install. I would recommend to anyone that wants to use there 7 pin and also 4 pin. I use 4 pin for light strip. 245609



Michael - 04/16/2017


- C55384

by: Jordan m.04/17/2015

Best purchase and easiest install EVER! Had it installed in 24 min, had trailer hooked up in less and am headed to the Mohonks for some trout catching. I will definitely be bolting on some more swag!!!! 185610

- C55384

by: Glory08/31/2016

The connector fits perfectly. I am so glad I found this retailer. Couldn't find the part anywhere else. And it was very reasonably priced. Installed in a jiffy and works just fine on my 2017 Audi Q7. 289760

- C55384

by: Jean03/19/2015

The part came in on time as Jean said it would, in less than 20 minutes, after I got the part I was done, no splicing, just unplug insert, and replug it fit perfect. Thank you Etrailer and Jean 179650

- C55384

by: Jeff C.09/05/2017

I bought this harness adaptor for installation of an OPT7 Tailgate Light Bar. The Harness Adaptor is well made and arrived very quickly. I will be shopping here again in the near future. 429005

- C55384

by: Frank C.05/11/2017

Great company to do business with. Prompt shipping, the right parts at the right price. Got exactly what I needed to install a light bar on my new truck and make it look professional. 379215

- C55384

by: Jaime N02/27/2015

Could not be more satisfied with the whole purchase. From the extremely helpfull web site, to the ordering, to the delivery. I will definitely recommend ETRAILER to every one I know. 176376

Show More Reviews

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

  • Trailer Hitch and Wiring for a 2017 Dodge Durango
  • For your 2017 Dodge Durango you can use Curt trailer hitch # C13182. This is a Class III hitch with a 2 inch receiver that fits all models of the 2017 Durango (R/T models with dual exhuast will require trimming of the heat shield and fascia, and full-size spare will not be able to be stored under the vehicle). I have included a link to a video showing an example installation for you. I also recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise...
    view full answer...

  • 2015 Jeep Grand Cherokee Trailer Wiring Troubleshooting, 7-Way Not Active
  • Your 2015 Jeep Grand Cherokee may have the connector needed but it's not active. First, I would use a circuit tester such as # 3808 to test the 7-way connector to see if it's active. You may need to contact a Jeep dealer to have them activate the trailer wiring as it sounds like yours isn't. This is a fairly common issue that we have seen.
    view full answer...

  • Recommended 7-Way Trailer Connector for 2014 Ford F150 STX
  • Under the rear of your truck, near the back bumper, you should find the factory trailer wiring harness. It will probably be located on the driver's side frame rail, just behind the rear tire. The harness will terminate in a round plug that would plug directly into the trailer connector I'd recommend, which is the Hopkins # HM40975. This connector provides both a 7-way and a 4-pole. The round plug you find under the vehicle will have a protective cap on the end of it to keep out road...
    view full answer...

  • Can Installing Towing Package Components Increase Towing Capacity on a 2015 Chevrolet Tahoe LT?
  • Adding towing package components will help you maximize the towing capacity of your Tahoe LT, but it will not increase it. If you own the vehicle, it is up to you what modifications are made. The only way I can see it being prohibitive would be if it were to void a warranty of some type. I was able to find a towing capacity chart in your owner's manual for you to identify which vehicle you have. I have linked the chart to this page for you. If you decide you would like to continue...
    view full answer...

  • Recommended Wiring Harness for a 2014 Jeep Grand Cherokee Without a Tow Package
  • Your 2014 Jeep Grand Cherokee may have the connector needed but it's not active. First, I would use a circuit tester such as # 3808 to test the connector to see if it's active. Since your Jeep did not come with a factory 7-Way you may need to have the dealer reprogram the computer to activate the trailer wiring harness. The harness will plug into the connector though. There are 3 trailer wiring kits we currently offer that works with your 2014 Jeep Grand Cherokee as long as the connector...
    view full answer...

  • Installing 7-Way/4-Pole Trailer Wiring Harness on 2013 Chevy Traverse LT
  • I do have a solution that would allow you to install the # HM40975 on your 2012 Traverse. I assume the socket you've found on the passenger side frame rail, to the right of the muffler as shown in Diagram 'C' that I provided. You would first install the Tow Ready # 118271 that you mentioned, because you need the fuses and relays to activate the tow package as well as the pigtail. On the rear of the 7-way where the pigtail meets the trailer connector, you'd slide up the gray locking clip...
    view full answer...

  • Wiring Dome Light and Third Brake Light on a Camper Shell on a 2009 GMC Sierra SLE
  • The Curt T-connector # C55384 has a 4-Way flat connector on it. The functions that it carriers are running lights, left turn/brake lights, right turn/brake lights, and ground. If the dome light runs off of the running light circuit and the wiring on the camper shell has a converter that separates out the combined turn signal and brake lights to only include the brake light then this harness will work. However it is probably not likely that the camper shell is wired this way. If that...
    view full answer...

  • Best In-Bed 5th Wheel/Gooseneck Trailer Wiring for a 2015 Chevy Silverado 3500HD
  • Absolutely. Since your 2015 Chevy Silverado 3500 came with a factory installed 7-Way you will be able to tee into the existing harness to install in-bed 5th wheel wiring. You can use # 41157. It will plug in line right behind the factory 7-Way. I have included a link to a video showing installation on a 2014 model for you.
    view full answer...

  • Wiring B&W Custom Headache Rack with LED Lights BWPUCP7500WA on 2017 Ford Superduty
  • The B&W Custom Headache Rack with LED Lights # BWPUCP7500WA is designed so that the two innermost lights will serve as taillights while the two on the outside work as brake/turn lights. These lights are fed by bonded 4-pole wiring like what is typically found in a 4-pole wiring harness. An easy way to access the required lighting signals is to install harness # C55384 at your 7-way. This plugs in inline with your factory wiring and both the new harness and the factory 7-way will remain...
    view full answer...

  • No Power on Power Wire of 2011 Chevrolet Tahoe
  • The power wire on the trailer connector gets power from the battery via the fuse box. You will want to check the fuse box panel to make sure the wires under the hood are connected to the fuse box (see FAQ). If your 2011 Tahoe does not have a factory 7-way, you will need to install Replacement Multi-Tow 7-Way and 4-Way, part # 30955. This will connect to the wiring above the spare tire on your 2011 Tahoe. I have linked an FAQ on installing a brake controller and 7-way connector on...
    view full answer...

  • Towing Capacity of a 2008 Ford Explorer Sport Trac
  • According to the owner's manual, the towing capacity of your 2008 Ford Explorer Sport Track is going to depend on your engine and hitch. With the standard factory Class II hitch you can tow 3,500 lbs with a 350 lb tongue weight regardless of engine. However, if you have a Class III or IV hitch, you can tow 5,000 lbs (4.0L engine) or 7,000 lbs (4.6L engine) with a tongue weight of 500 lbs. However, it is important to know what the maximum capacity of your hitch is; the lowest capacity of...
    view full answer...

  • Recommended Components Needed For Towing With 2015 Chevrolet Tahoe With Police Package
  • From my research on your 2015 Chevrolet Tahoe with the Police Package, I found that the trailer hitch receiver was a standard item. We do not list any rear mounted trailer hitches for the 2015 Tahoe. You may be interested in the etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. I have attached a product...
    view full answer...

  • How to Add a Second 4-Way to a 7-Way that is Using a 4-Way Adapter
  • What you could use is the part # C55384. This will plug inline with the 7-way you have at the rear of your motorhome and will provide you with a second 4-way. The 7-way would still be active which would allow the 4-way adapter to still function.
    view full answer...

  • Hitch and Wiring Recommendation for a 2007 Nissan Titan
  • First let's start with a hitch for your 2007 Nissan Titan. For that you would want the Curt Hitch part # 13199. This has been confirmed to fit your truck and is our most popular option. I attached an install video for you to check out as well. For trailer wiring the # N40975 would cover both a 7-way and a 4-way so you would not also need the # C55384. I attached an install video for the trailer wiring for you to check out as well. If you wanted to do some towing you might be interested...
    view full answer...

  • Trailer Wiring Harness for 2016 Silverado 1500 Without Tow Package
  • For a 2016 Silverado 1500 without the factory trailer wiring option you can use one of the trailer wiring harness kits shown on the linked page. Your truck will have a round U.S. Car type connector under the rear bumper. To this you can connect a 4-pole type harness like # C55384 or a 7-way like # 41157. A 4pole connector carries only stop, turn and taillight signals. A 7-way carries these same signals plus three additional circuits, typically for trailer brakes, 12V auxiliary trailer...
    view full answer...

  • No Power to Brand New 2014 Jeep Grand Cherokee
  • If you have a brand new 2014 Jeep Grand Cherokee and the 7-way does not have power on all of the pins then I would take the Jeep back to the dealer you bought it from and have them fix it. Most likely it's missing relays or they are blown somehow. Either way they should be all functional from the factory so it would be on them to make it work. If this is an aftermarket 7-way you installed on your vehicle then it will need to be reprogrammed. You might check your owners manual for...
    view full answer...

  • Will OEM Trailer Connector Still Work if # C55384 T-Connector is Installed on 2001 Dodge Ram 1500
  • Since the # C55384 T-Connector plugs inline with the existing wiring, it will allow all the signals to pass through it so that the factory 7-way and 4-pole will still be functional. To install the T-Connector, simply unplug the wiring harness that plugs into the rear of your existing 7-way/4-pole. Plug the 1/2 the T-connector into the vehicle harness, and plug the other end of the T-connector into the rear of the factory trailer connector.
    view full answer...

  • Adding 4-Way Connector To 2014 Jeep Grand Cherokee With Oem 7-Way Wiring
  • We have a few options that will work for your 2014 Jeep Grand Cherokee. If you want to retain the 7-way connector at the back of your Jeep and add the 4-way connector The Hopkins 7- and 4-Pole Trailer Connector, part # HM40975 will work well for you. My on ly concern is if you have the length from the existing 7-way to plug into the back of this connector. If so, then you are good to go. Another connector you may want to consider is the Curt T-Connector Vehicle Wiring Harness, part...
    view full answer...

  • Compatibility of Curt 55384 4-Pole Vehicle Wiring Harness for Factory Tow Package on 2015 Ram 1500
  • If your 2015 Ram already has a 7-way trailer connector, you could install a 4 pole trailer connector by using the # C55384. You would unplug the trucks wiring harness from the rear of the 7-way and the # C55384 would plug inline between the vehicle wiring harness and the 7-way, as shown in the video I've linked for you.
    view full answer...

  • 4-Way Flat Trailer Connection Compatible With In-Line US Car Adapter
  • I called my contact at Curt and we haven't seen a 2017 Honda Ridgeline yet to confirm a fit but have heard rumors that they were going to the US Car adapter plug that most vehicles now have. If that is the case with your Ridgeline, then the # C55384 will work with your vehicle.
    view full answer...

  • Recommended 4-Way Flat Connector that Retains the Function of Factory 7-Way To Power Accessory
  • Since you already have the factory 7-way, you only need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # C55384. This will install right behind your 7-way to give you the 4-way plug you need for your backup camera. This will retain the functionality of your 7-way as well.
    view full answer...

  • Trailer Wiring Harness that Does Not Require Splicing for a 2016 Chevy Colorado
  • I have a solution that will not require cutting and splicing wires but there isn't a plug and play harness available for the 2016 Chevy Colorado. What I recommend is the ZCI wiring harness # 119250KIT. This harness has connectors that clamp around the vehicle tail light wiring that sense the current running through the wires. No need to splice!
    view full answer...

  • Recommended 4-Way Flat Wiring Harness for 2016 Chevy Silverado 1500 with Existing Factory 7-Way
  • The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # C55384 is a great option to add an additional 4-Way flat connector to your 2016 Chevrolet Silverado 1500 Z71 to plug in a tailgate light bar. I confirmed with my contact at Curt that this wiring harness is a fit for your vehicle. The # C55384 plugs into your existing factory wiring with a standard US car connector. Since this is the type of connector used on your Silverado, the harness will work great. I've attached...
    view full answer...

  • Trailer Hitch Recommendation for towing Small Pop Up Camper with 2014 Ram 1500
  • The Curt Class III Trailer Hitch Receiver # 13333 is confirmed to fit your 2014 Ram 1500 that does not have a factory hitch. The gross towing weight of this trailer hitch is 6,000 pounds, so towing a small pop up camper will not be an issue at all. There is no need for a higher rated trailer hitch for your setup. This is a custom fit hitch for your Ram 1500 with a bolt-on installation, so no drilling will be required. I have included an installation video on a Ram 1500 for you to check...
    view full answer...

  • Trailer Wiring Harness for a 2001 Toyota Sienna
  • There are several different wiring harness that will fit your 2001 Toyota Sienna and I have included a link to them for you. However, the harness that you referenced, # C55384, will not fit your Sienna. For a harness that plugs in line with the vehicle tail light wiring you can use # C55418. I have included a link to the installation instructions for you to view.
    view full answer...

  • Can Tow Dolly Taillights and the Pilot Magnetic Tow Lights Be Used at Same Time
  • If you have both a 7-way and a 4-way on your tow vehicle and your dolly uses a 4-way the # NV-5164 would plug into the 7-way and both should work just fine. Or if you have just a 7-way on your tow vehicle you could install the part # C55384 and you would have an additional 4-way that you could use for your dolly.
    view full answer...

  • Will Curt T-Connector Wiring Harness for Factory Tow Package C55384 Fit 2015 Ram 1500 Factory Wiring
  • Yes, the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # C55384 will plug in line with the factory 7-Way trailer connector on a 2015 Ram 1500. I have linked a video showing an example installation on a different truck.
    view full answer...

  • Does the 4-way on a 2013 Ram 1500 Have Separate or Combined Taillight Wiring
  • Since you already have a 4-way and a 7-way the Curt Wiring Connector part # C55384 that you referenced would only provide you with an additional 4-way on your 2013 Ram 1500. The 4-way on your vehicle should already have the tail light circuits combined. I would recommend you test the circuits of the 4-way you have with a circuit tester like our part # 3808 to verify the circuit configuration. It should already have combined circuits. If for some bizarre reason the 4-way has a different...
    view full answer...

  • Recommended Trailer Hitch for 2014 Chevy Silverado Regular Cab
  • The most popular hitch for your 2014 Chevy Silverado regular cab is Curt Trailer Hitch, part # 14301. This is a 2 inch hitch rated for 1,000 pounds tongue weight and 10,000 pounds gross trailer weight. I have provided a link to the installation instructions for you to review. Also check out the attached installation video. This video features a 2013 Chevy Silverado but the installation is similar. I have also included a link to all available trailer hitches that are confirmed fits...
    view full answer...

  • Trailer Light Fuse Location on a 2005 Chevy SSR
  • I checked an online copy of the owners manual for a 2005 Chevy SSR and found only one reference to a trailer lights fuse. It is the fuse in spot 42 in the floor console fuse block and it is called the trailer parking lamp fuse. You can confirm this with your owners manual.
    view full answer...

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

  • Why

    At we guarantee:

  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Test Fit:
Joe V
Photos by:
Theodore B
Expert Research:
Michael L
Video by:
Andrew K
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Reno H
Expert Research:
Jameson C
Video by:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Expert Research:
Adam R
Video by:
Kathleen M
Video by:
Dustin K
Expert Research:
Jeffrey L
Test Fit:
Randy B
Video Edited:
Chris R
Test Fit:
Jared G
Expert Research:
Victoria B
Test Fit:
Andrew S
Test Fit:
Brent H

At 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.

About Us
photos and videos

Original Photos & Videos

Produced to make sure you know what you are getting and you get exactly what you need.


Installations Completed

To make sure products work and fit the way they are supposed to.

etrailer call center

Phone Calls & Emails Answered

1,125,924 phone calls and 1,350,587 emails to help find the right solution.

etrailer training

Average Hours of Product Training

We get to know our products firsthand so experts can better help you.

etrailer service

Years of Quality Customer Service

Assisting our neighbors and customers, face to face at the counter.

etrailer experts

Pages of Expert Information

Created to make sure you have all the answers to your questions, from real experts.