Price: $24.67

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

Item # 118384

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tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector
tekonsha custom fit vehicle wiring no converter 4 flat
tekonsha custom fit vehicle wiring 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector
tekonsha custom fit vehicle wiring no converter 4 flat 118384

In Use/Installed

2015 jeep grand cherokee custom fit vehicle wiring tekonsha trailer hitch 4 flat 118384
2015 jeep grand cherokee custom fit vehicle wiring tekonsha trailer hitch 4 flat t-one harness with 4-pole connector
2015 jeep grand cherokee custom fit vehicle wiring tekonsha no converter 4 flat 118384
2015 jeep grand cherokee custom fit vehicle wiring tekonsha no converter 4 flat in use
2015 jeep grand cherokee custom fit vehicle wiring tekonsha trailer hitch in use
2015 jeep grand cherokee custom fit vehicle wiring tekonsha no converter 118384

Customer Photos

tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector
tekonsha custom fit vehicle wiring no converter 4 flat 118384
tekonsha custom fit vehicle wiring no converter 4 flat in use
tekonsha custom fit vehicle wiring trailer hitch in use
tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector
tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat 118384
tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector

  • Custom Fit
  • Trailer Hitch Wiring
  • Tekonsha
  • 4 Flat
  • No Converter
Tekonsha custom fit vehicle wiring for your 1999 GMC Sierra are available from etrailer.com. Installation instructions and reviews for your GMC custom fit vehicle wiring. Expert service, and cheapest custom fit vehicle wiring price guarantee. etrailer.com carries a complete line of Tekonsha products. Order your T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part number 118384 online at etrailer.com or call 800-298-8924 for expert service.



1999 GMC Sierra - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Quickly and easily install a 4-way trailer connector on your GMC Sierra. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.


Features:

  • Provides a 4-way flat trailer connector at the back of your GMC Sierra to power your trailer's signal lights
    • Retains functionality of factory-installed 7-way, RV-style connector (if present)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your GMC Sierra's wiring harness, which is located behind the rear bumper. If you have a factory-installed 7-way, blade-style connector, the T-One will plug in between the 7-way and the OEM socket.


Once installation is complete, the 4-way flat connector will be stowed beneath your GMC Sierra, 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.



118384 Tow Ready T-1 T-Connector - 4 Wire



118384 Installation InstructionsInstallation Details 118384 Installation instructions

Video of T-One Vehicle Wiring Harness with 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 Tow Ready Custom Fit Vehicle Wiring 118384 Review

Today, we're going to review part number 118384. This is the tow-ready T1 vehicle wiring harness with the 4 way flat trailer connector. Now, this part is designed to fit many Dodge, GM, and Nissan vehicles that have the factory tow package. I do recommend to use the fit guide on our website to help determine if it will fit your particular vehicle. This part will provide a 4 way flat trailer connector at the back of your vehicle to power your trailer's signal lights. Now, it is designed to tee into the factory-installed tow package. Now, on the factory-installed tow package, if you do have the factory-installed 7 way on the vehicle, what you can do is unplug the harness from the back of the 7 way, go ahead and plug this into the 7 way, plug the harness into this, and then that will give you the 4 way in addition to the 7 way.

In other words, it will retain the 7 way functions on the factory-installed 7 way, if you do add this into it. Now, on some factory tow package, they might leave off the 7 way at the bumper. So basically what you want to do is look under, behind the rear bumper, and you'll usually see where the factory tow package, wire, and harness will end, and then they usually have a cap on the end of it. What you want to do is take that cap off, and again, basically, plug this into the wiring harness, take that cap that you removed, and put it back in here, since you won't have the 7 way on your vehicle, and then you'll at least have the 4 way to the back of your vehicle. This is very easy to quick connects very quickly and easily. There is no cutting or splicing of the wires.

Basically, it is constructed of 16 gauge bonded wire. Now the 4 way, if you notice, does come with this dust cap that's connected. So, when you plug it in, when you're not using it, you can just put the dust cap on to protect it, keep it from corroding, or any damage to it. Now, this wire loom itself, if you stretch it out and measure it, it is about 36 inches long, and it does come with these instructions, which are very good, and they also have some good pictures to show you how to connect it. That should do it for the review on part number 118384, the tow-ready T1 vehicle wiring harness with the 4 way flat trailer connector. .


Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118384

Average Customer Rating:  4.9 out of 5 stars   (176 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your GMC Sierra. This T-One typically plugs directly into the back of your factory-installed 7-way connector so you can retain the 7-way and also pull a trailer that has a 4-pole flat.

- 118384

by: DALE N.03/26/2012


TRAILER WIRING HARNESS WENT TOGETHER REAL GOOD. IT ONLY TOOK A VERY LITTLE TIME TO INSTALL. THIS MADE INSTALLING MY LED BRAKE LIGHT KIT VERY EASY. 35167



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by: Brandy ICU RN02/02/2017


Purchased this hitch for my new 2016 Jeep Grand Cherokee Laredo online after being quoted a $700 installation price at my local Chrysler Dealership. After doing some online searching and reading multiple reviews I decided to give these folks a try. My husband and I watched a very detailed video explaining 3 different hitch options for my Jeep and quickly decided for the price it was worth giving it a try. From opening box to install was less than 20 minutes that included connecting trailer light kit that I purchased extra $$.$$. You can barely see it under my JEEP. I'm very pleased and can't hardly wait to use it. Thanks again etrailer.com you helped me prove my to my husband that it would work and saved me $600! 337917



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by: Gary G.04/28/2017


I recently purchased a new 2017 Jeep Grand Cherokee. However, the vehicle was not equipped with with a trailer hitch but came pre-wired for trailering. I asked if the dealership could install a hitch/wiring and was informed that they subcontract the work to a local trailer rental company. I went to the company and was told it would cost approximately $400 and I would have to leave my vehicle with them for four hours, which would have been very inconvenient because I live 50 miles away. As a result, I researched alternatives online to see if I could install the hitch and wiring myself. etrailer.com had the best customer reviews and help videos, so I placed an order for the hitch and wiring harness. My wife and I installed them yesterday, which took about an hour. I saved $270 from what the trailer company was going to charge me. Very happy with the purchase. 373659



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by: Anthony P07/12/2017


Search hi and low to find what I needed or even for someone who even understood what I needed. I had no luck until I search on etrailer.com. They had exactly what I was looking for. Ordering was simple and delivery was quick. They even check in with me before durning and after shipping. I love this site. I'll definitely shop here first next time. 404870



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by: Ken Yes09/22/2016


So we received our order for our Jeep Grand Cherokee in a very timely manner. The hitch was priced very reasonable and the electrical adapter was as well. It literally took me 30 minutes to install both items. This saved us between $100 up to $500 depending on where I would have taken it to have the work done. E trailer had very helpful videos on line for review before install. You will need a torque wrench and Walmart has the best deal. We did find out the hard way that if you don't buy your vehicle with a tow package you will have to take it to the dealer and have it tuned as our trailer lights would not come on. All in all we highly recommend e trailer for do it yourself trailer hitch. Thank you e trailer 299913



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by: Scott S09/29/2017


I Love products like this and the company , exactly what you want processed and delivered super fast This product was excellent, simple to use and the product videos on the website were perfect Only minor thing was it did not have the little plastic clip lock key like the factory plug did, but luckily I happened to have one laying around so no real big deal, not like I’ve ever had a plug come off that was missing one since the clip is there but you know...details I purchased this product to keep the wires for my tailgate light bar hidden since they had the flat 4 pin and having that run up behind and over my bumper was unpleasant 437633



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by: Jay05/01/2017


This product is great! It allows for connection flexibility, it has a great oem fit to the oem connector. All I have to do is disconnect the existing oem connector cable and connect to the custom connector, reverse when finished. I have used it several times over the course of the year, and plan to use it again in just under two months to pull a trailer from Michigan to Upstate NY through Canada, and I have no concerns or reservations about the performance I expect from this connector. The length is good and leaves plenty of room to flex for trailer turning. I would buy this product again. 375022



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by: Kevin - Sanford, NC09/11/2016


Have been looking for a T-connector for my trailer lights for two years. Truck has a seven pin connector built-in. Wanted my GMC emblem to light up when the breaks are applied. Was getting ready to cut and splice wires when I looked on the internet and learned about etrailer.com. Found the T-connector I needed. Took 5 days to arrive after ordering, and 5 minutes to install. Works great ! 293541



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by: Bob06/03/2016


I recently purchased a LED tailgate bar and I did not want to keep the 4 prong connector plugged into my stock connector on the rear bumper. After talking with a friend about splicing the wires into the back of trailer hookup wires he suggested looking on etrailer for a splitter. I found this piece and felt more comfortable paying for it than stripping wires and splicing it. The part came in within a week and was a simple easy install! Now you cannot see any wires and allows me to have my LED bar plugged in and still be able to connect my trailer! 256363



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by: Ralph S03/19/2012


Perfect fit on my 2012 Jeep Grand Cherokee. Hitch and wiring harness installed in 20 minutes. This is my fifth hitch and wiring harness purchased thru etrailer and have yet to be dissapointed. Both the video and written instructions were spot on, the installation of the wiring harness couldn't be easier! 34414


Comments

Just did this install on a 2011 Jeep Grand Cherokee everything is just like the video. But the only thing that worked was tail lights. No turn or brake lights. I could not find any fuse or relays bad or missing. Did I miss something?

-- comment by: Glenn H - 09/21/2012

58

Part # 118384 is designed for Grand Cherokees with a factory tow package. Without the factory tow package, not all functions will work. In order to make it function, youll need to head to your dealer and have them re-flash either the Body Control Module BCM or Power Control Module PCM to fully activate that port.The other option is to use a harness designed for Grand Cherokees that dont have factory tow packages like part # 118425.

-- Patrick B - 9/21/2012


- 118384

by: Damian R03/17/2014


Excellent product and easy to install! Finished up the installation with products 118144 and 118140 for a clean looking install. 121048



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by: Teddy B.08/22/2011


etrailer.com had the best price around on this wiring kit, their site was easy to navigate and they upgraded my shipping from 5 to 7 days to 3 to 5 at no extra cost to me. The tracking info page was updated frequently and the map feature was a nice touch. The package came in and we were able to hook it up in a matter of 30 seconds, great fit and works perfectly with the trailer. Overall I'm very happy with my transaction with etrailer.com and would not hesitate to order from them again. 22454



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by: E WHITESTONE04/23/2012


On my 2012 GMC Sierra, this was the best way to retain the 7 pole factory connection and also have a 4 pole connection. This product lets me have both 4 and 7 pole connections available at the truck, all the time, without adaptors to carry around. Most of the light trailers I pull have the 4 pole connection. I don't use the factory 7 pole very often. Installation is about 2 minutes. Check out the video on this product, it's very helpful. 38140



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by: Freddy M.08/06/2016


I purchased a trailer hitch (C13182) and wiring adaptor (T-One 118384) for my 2016 Grand Cherokee. Received it within a few days and fit was perfect! Only took all of ten minutes to install with the help of my 5 year old. Thank You! 280812



- 118384

by: RickM09/19/2017


Makes things real easy from a display standpoint, only took about 10 minutes. But if it makes a difference to you be sure and check what your dealer will charge to "flash" the computer to activate the wiring - mine charged $135 (Southern CA). They claim they have to go in and add the "accessory code" to the VIN record since it wasn't factory ordered. Just an FYI... 434010



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by: Gary05/09/2013


Received complete order and was very well packaged. It was a one man job and took me about 1 hour to install the trailer hitch receiver. Most time was consumed because of rust in screw holes. I also ordered the wrong wiring harness. I called and a replacement is on it's way along with return information to send wrong harness back for credit. Thank you very much. 79656



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by: Ron H.02/14/2014


This was a very simple harness to install. Appears to be very good quality. Saves you the time of having to splice a 4 prong connector later. I coupled this with the twist in 7 prong to replace the "dummy" plug on my 2007 Sierra. The whole process took about 15 minutes. Well worth the money. The hardest part of the whole install was hiding/tying up the wires. 116589



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by: JD07/09/2017


I have 7 pin factory installed, and desired hidden 4 pin for a LED rear bar. I am not proficient with electricity, so spliciing made me nervous. This harmess fit the bill perfectly. Shipped and arrived quickly. Install (not including mounting the four pin) was less than five minutes. Four pin cable is quite long. I am very pleased this item exists. 403613



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by: Gregg B.03/22/2017


I researched and purchased a trailer hitch and wiring adapter for my new GMC truck on etrailer.com. The website was easy to navigate, had all the information needed to identify the parts I needed, and the transaction was very smooth. The parts just arrived a few days ago, and everything was exactly as I had expected. Great job etrailer!! 360206



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by: Bob O06/19/2011


the trailer hitch adapter I bought for my GMC truck was just what I needed to attach an LED lightbar below the tailgate and still have a plug for a trailer. There was a short in the plug but it seems to be working ok as I just bent the wire and wiretied it in place to keep it working. The shipping was prompt and rapid and much appreciated 17257



- 118384

by: Peter01/28/2017


I was looking to install a trailer hitch on my new 2016 Jeep Grand Cherokee. I browsed several website not having ordered trailering equipment before. eTrailer had the right hitch at the best price, so I gave them a try. It was delivered on time and fit perfectly. It only made sense to order the wiring harness from eTrailer as well! 336289



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by: Arnold C01/13/2014


I am very pleased with the T-0ne 4-pole flatTrailer Connector #118384. This is what I have been looking for months. The whole connection and wire-tie's support took me fifteen minutes. The longest time, 10 minutes, was spent supporting the extra cable to the frame with wire-ties. eTrailer is definetly on my browser favorite list! 112712



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by: Tom matheny10/21/2011


your price was almost half the price at the u-haul place here in tulsa ok the phone personal really guided me thru getting the RIGHT part which has sometimes been a bad experience. thanks for the follow up e-mails that helped me track the shippment. I would and will recommend etrailer to all my friends and family 25932



- 118384

by: Kennith P02/21/2012


I actually ordered one of the wrong items. It was not your fault but my inattention. Your company was easy to deal with and delivered quick. I ordered the Draw Tite Trailer Hitch. I installed it by myself and it took about 30 minutes and bolted right to the frame and all the necessary hardware was there. 32081



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by: David A.12/25/2016


Excellent product. Installed in about 40 minutes including breezing through the instructions. Ordered the hitch and the wire kit. Very happy with both. Ordered the week before Christmas and shipping was very quick, two days from order to door. Will use etrailer for all my future trailering needs 328886



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by: Bradley08/04/2017


Seemed like a fair quality product if you have a vehicle with the associated plugs. I've purchased multiple version that were suppose to fit a Tacoma and keep coming back to the same ending I have to hack my factory wiring and start over. Three purchases now and not a one is a direct fit. 415133



- 118384

by: Piano Steve05/16/2013


Took me all of 30 seconds to install this product. I'm using it for an additional 4 prong plug to attach a tailgate bar from Recon. Was also able to attach the reverse, and power lines with just a quick cut and splice. Now if I remove the tailgate bar, I can remove the wires, in seconds. 80554



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by: Jose Luis Rodriguez01/23/2017


I bought a Curtis trailer hitch receiver class IV and a T-One Connector wiring harness for my 2009 Silverado all I can say is Great Quality product and fits perfectly fast shipping, Highly recommended to any body else Definitely I'll buy again if needed Thanks Angela W you're the best... 337633



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by: John S.08/18/2016


Items 118384 & 13322 were shipped FAST and well packaged. The hitch went on as per the video and with no problems. The wiring hooked up easily and all was completed within a hour. I can now get rid of the bumper ball and move /pull what ever I need to move with my Chevy Silverado. 285370



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by: Chuck C05/06/2014


Great item. So much easier to use than cut and splice. Used it to make a quick disconnect for my Leer Camper Shell. I have a few aux. lights both exterior and interior and this makes it a breeze to run a 4 wire connector kit up to the bed for those times where the shell gets removed. 129097



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by: Chris G03/26/2014


Very impressed with your company. I knew at all times the status of my order and shipping was fast and prompt. Was very easy to find the compatible product on your site as well. Would definitely shop with you again. Also loved the multiple emails giving me updates of my product. 122397



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by: Robert R08/24/2016


Very happy with the adapter. The install video was dead on. The adapter comes with wire loom and plenty of pig tail to reach the rear of the vehicle. Took all of 30 seconds to install. Paid for basic shipping ordered on Friday night received my package on Wednesday. 287328



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by: Clement N.05/12/2014


I'm so glad that I bought this product it really fits on my truck also it was very easy to install, now I can install my led bar light without having the wire sticking out, I hide the connector under where the spare tires is at. Thnx again etrailer! Awesome product!?? 130126



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by: Rob C.04/06/2017


Install took less than 10 minutes and so far it works great for my tail gate light bar. Only wish the 7 pin plugs had lock tabs to keep from backing out. They do have a tight fit but to ensure they don't back put I used some zip ties on it. 363729



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by: brandon w06/10/2015


Erika was more than helpful. She looked a second time and found my product. Very friendly and product was received quickly and just as I ordered. Will do business here again. Only con was shipping was a little pricy for single item. 202294



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by: Greg T09/02/2016


Second time ordering, and second time I received the correct item. It worked perfectly for my vehicle. Quick, inexpensive and great service. Easy to navigate throughout the web pages. Highly recommend!!! Thank you 290332



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by: Dan P.05/03/2013


Great product,took less than 2 minutes to connect to my 04 Silverado stepside. Made hooking up tailgate led's a lot faster and made the installation look professional. I will be ordering from these guys again. Thanks ! 78806



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by: Ray N.09/17/2012


This was the easiest harness I have ever installed. There was more than enough wire for to remove the 4 pole connector and install my 7 pole round connector. Being able to keep the 7 pole flat connector is also a bonus. 54970



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by: Matt H10/16/2014


Bought Fire Lights for my 2010 Chevy Silverado hides the connector perfectly. Works well installed one on my uncles 2014 GMC Sierra for his fire lights even worked for him. Great products Great Service 156359



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by: Jack A01/05/2017


Perfect fit and not hard for a "do it yourselfer", wiring harness was a snap too............almost takes longer to get the jeep dealer to flash the memory to turn the trailer light circuit............. 330135



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by: Robert04/11/2013


excellent product, just what i was looking for, easy install in just minutes (for 2008 silverado), tidy look, beats the heck out of the wires hanging from my old nissan taillight rig up in the past. 75410



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by: Tom02/28/2013


The product did exactly what it was meant for. Easy to install. I used it so I could plug in an led light bar on the back of my truck so I didn't have to use my 4 port plug or do any hard wiring. 68203



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by: Logan06/10/2017


PRODUCT: WOW! I have zero mechanical capabilities at all and installed this on my 2016 Jeep Grand Cherokee in 2 minutes flat. The installation video was excellent and depicted everything exactly. 391410



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by: Donn D01/07/2013


A high quality exactly as described product,that fits perfect,and was shipped very fast. My second order this month,and like the first went very smooth with GREAT follow up---Thank You e.t. 62590



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by: Wendy J.01/30/2012


wow! you guys are great! super fast shipping! we have ordered from etrailer twice now and will definately order again. Great customer service and super fast shipping, couldnt ask for more! 30562



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by: phil perto12/07/2012


I have 2012 Dodge Ram with towing hook up in rear bumper this adapter part#118384 fit perfect up behind bumper nice clean install. works great with my tailgate led lights thanks etrailer. 60894



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by: Ed C.03/25/2017


looks like an excellent product. I'm still waiting for my under the dash switch. I'll let you know when I get things up and running. Question? why three different deliveries? hummm 358392



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by: Benjamin Harris01/24/2008


30 second install time. No kidding that this wiring harness took a simple 30 seconds to install. Plug it in and you are done! Great product and I love that no splicing is involved. 585



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by: Lee D01/10/2011


Everything Great ETrailer is on top of their game. Excellent product which performs exactly as advertised, great communication, and fast shipping; they have the whole package. 5290



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by: Bill in CT05/03/2013


Installed in 5 minutes, 2009 Silverado with Tow package. Now I have the 4 pin behind the bumper so I can hook up a tailgate light bar without using the 7 in outlet. 78843


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


  • No Trailer Running Lights Troubleshooting on a 2012 Dodge Ram 3500
  • It sounds like you have narrowed the problem down to being on your 2012 Dodge Ram 3500 since multiple trailers have had the same results when connected to that vehicle. It sounds like the problem could be a blown relay on your truck since you have checked the fuses. However, the fuse you would be looking for should be in cavity J14 and will require a 20 amp cartridge fuse. We have seen this issue a few times and have seen some threads on the internet where people have had this problem...
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  • How to Install 4-Way Trailer Connector on 1999 Chevrolet Silverado 1500 with Factory Tow Package
  • The Tow Ready T-One Wiring Harness, part # 118315, is for the 1988 to 2000 Chevrolet C/K Series trucks. It is not for the 1999 Chevrolet Silverado 1500. The 1999 Chevrolet Silverado 1500 would use either the Tow Ready Wiring Harness, part # 118384, which is used if you have a harness that is located under the vehicle, behind the bumper, on the driver’s side of the vehicle. The wiring harness # 118384, is meant to plug in line with the factory wiring and provide a 4-Way flat connection....
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  • Trailer Running Light Fuse Location 2016 Ram 3500
  • I pulled up a copy of your owners manual online and it looks like F29 is the fuse slot you are looking for for the trailer running lights circuit. This will be a blue 20 amp cartridge fuse.
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  • Location of Factory Connector for Trailer Wiring on 2006 Chevy Silverado 1500
  • Your truck should have a round connector located above the spare tire for the adapter (part # 118384) to plug into. To locate the connector, you might have to lower the spare tire. The connector is usually zip tied to the rearmost cross member. The connector might have a protective cover over the end of it to keep road debris out of it. Certain models might not have the plug, but the wiring harness should still be there. If this is the case with your vehicle, cut the plug off the end...
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  • Fuse Location for 12 Volt Circuit on 7-Way Trailer Connector for a 2012 Ram 3500
  • It sounds like the trailer tow fuse may be blown or missing on your 2012 Ram 3500. It is located in cavity J01 in the under hood fuse box (Totally Integrated Power Module). The other trailer tow fuses are related to the lights or brake controller and would not affect the 12 volt circuit on the 7-Way connector.
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  • What Trailer Wiring Harness Should be Used on a 2000 Chevy Silverado and How to Install It
  • With a 2000 Chevy Silverado, you should have a connector underneath the truck that a wiring harness will clip into. Tow Ready part # 118384 clips into the factory tail light wiring harness to provide a 4-Way flat trailer connector. I have included the instructions for this part below. Use the instructions and look to see if you have the necessary connector before you order. You could also use something like part # 30955 if you need a 7-Way. If the connector is not found underneath your...
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  • Are Fuses Needed on a 2011 Jeep Grand Cherokee to Activate the Factory Tow Package Trailer Wiring
  • If your 2011 Jeep Grand Cherokee has the Tow Package installed from the factory but there is no 7-Way or 4-Way connector at the rear of the vehicle, see photos in instructions link, you can add the 4-Way connector, item # 118384, inline with the factory 7-way connector, located behind the rear bumper on the drivers side. To get all of the taillight functions to work properly you would then need to go to the dealer and have them program the computer to activate the brake and turn signal...
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  • The brake controller will not be a 7 pin or 4 pin, it is the trailer connector that is at the back of your vehicle that will be either a 7-Way connector or a 4-Flat connector. To use a brake controller like the Tekonsha Prodigy P2 Brake Controller, part # 90885, on your 2012 Toyota Tundra you will need to have a 7-Way trailer connector at the rear of your vehicle. The 7-Way is required to give you the additional leads that are needed for the electric brakes, 12 volt hot lead, and backup...
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  • Troubleshooting Horse Trailer Interior Lights Not Functioning
  • The interior lights of your trailer would be powered by the 12 volt accessory circuit on the 7-way of your 2010 GMC Sierra. You will want to check the 1:00 position of the 7-way on your truck with a circuit tester like part # 3808 to verify if there is voltage on this pin. If there isn't voltage on this pin you are most likely missing the 40 amp fuse in the power distribution box and/or the circuit under the hood hasn't been completed. For more info on how to complete the circuit under...
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  • The definitive way to determine if a vehicle has a factory tow package or any other options is to have a dealer run the VIN number. Although if there is no 7-Way connector at the back of the truck, you most likely do not have a factory tow package. To install trailer wiring, you would need to use the custom fit vehicle wiring, # 118496. I have included links to the installation instructions and a video showing a typical installation. If you then wanted to add a 7-Way trailer connector,...
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  • Troubleshooting Running Lights Not Working on a 2008 Chevrolet Silverado after Installing Wiring
  • I would start troubleshooting at the connector itself. Take the connection apart and make sure there are no bent pins or corroded terminals that could cause the tail light function not to work. Next, I would check the fuse block under the hood of the truck. There should be a slot for a tow package fuse in there. Check the legend under the fuse block cover and you may find that this fuse is missing or that it has blown, and needs to be replaced. Finally, check the connector at the...
    view full answer...

  • Correct Trailer Wiring Harness for 2012 Jeep Liberty
  • To install the # 118384, you would need to unplug your existing 7-way harness from the rear of the socket. The # 118384 would plug inline between the vehicle harness and the existing 7-way, as shown in the video I linked you to. If your Liberty does NOT have the factory tow package with the 7-way trailer connector, the connector that the # 118384 would connect to will NOT be present. In this case, you would need part # 118554. I have linked you to the installation instructions for the...
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  • Trailer Lights Not Working Using 4- to 7-Way Adapter on a 2012 Mercedes GL450
  • If the trailer has LED lights then the issue isn't the adapter or the trailer. It is the vehicle. The 2012 Mercedes GL450 and other German vehicles do not work well with trailers that have LED lights. This is because LED lights do not draw enough power for the tow package on the vehicle to recognize them. Usually this is accompanied by a bulb out sensor light in the vehicle. The fix is to use a special adapter such as # TR20141. Or, if this is the adapter you are using then adding load...
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  • 2017 Jeep Grand Cherokee Options Needed To Tow a Trailer
  • On your 2017 Jeep Grand Cherokee, if you do not already have a 4-flat trailer plug installed, then you will need to install wiring harness to allow you to use the lights on the Lets Go Aero Trailer, # TLK864. The wiring harness that I recommend is the Tekonsha 4-Pole Flat Connector, # 118384. This harness is designed to plug in to the existing wiring of your Jeep with no cutting or splicing. The harness will allow you to run the trailer lights off your vehicle's lights. Next, you...
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  • Adding a 7-Way Trailer Connector to a 2012 Dodge Ram 2500 Big Horn With Flatbed
  • If your 2012 Dodge Ram 2500 came with a factory tow package that included a 7-Way at the back of the vehicle, you can use 5th wheel and gooseneck in-bed wiring harness, # 50-97-410. This harness plugs in line with the factory wiring harness under the truck and provides a 7-Way in the bed area. If the truck did not come with a factory tow package that included a trailer connector, you will have to hardwire one in starting with a 4-Way using # 119178KIT. A T-connector is not available....
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  • Trailer Running Lights Not Working with a 7-Way to 4-Way Adapter
  • There are a couple of possibilities here. First, it could just be a ground issue on the utility trailer. You will want to check the main ground from the trailer connector and the tail light grounds and make sure they are attached to clean and corrosion free bare metal surfaces. A ground issue will show up when there is a load on the circuit and having a constant draw on the circuit like with running lights could be what is making the ground issue appear. Also, you can check the trailer...
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  • Where is the Connection Point For Trailer Wiring Harness # 118384 on a 2011 Jeep Liberty
  • The Tow Ready Custom Fit Vehicle Wiring, # 118384, is designed to fit if your 2011 Jeep Liberty already has a factory 7-Way and you want to replace it with a 4-Way. The connection point is located behind the factory installed 7-way trailer connector, or up by the spare tire of the Jeep Liberty (GM Jeep Liberty only). I have included a link to the installation details for reference. If your Liberty did not come with a factory 7-Way trailer connector, you will need to use Draw-Tite Custom...
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  • 2005 Nissan Titan Trailer Lights Not Working Using Tow Ready Wiring Harness
  • If your 2005 Nissan Titan came with a tow package and a factory installed 7-Way trailer connector then it may be easier to use a simple adapter, like # PK12716, to go to a 4-Way. If your truck did not come with a 7-Way at the back, then you would probably need to add some relays, # C57000, to make the wiring fully functional. The relays are required for trucks that did not come with a factory tow package.
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  • Is there a Quick Connector Trailer Wiring Harness Available for a 2011 Jeep Grand Cherokee
  • The T-One wiring kit, item # 118425, is a quick T-connector kit that installs inline with the vehicle taillight wiring and does not require splicing into the vehicle factory wiring. This connector will provide a 4-Way trailer connector at the rear of your 2011 Jeep Grand Cherokee. The hardest part about installing this wiring harness is accessing the wiring at the rear of the vehicle taillights. We have a video of the # 118425 Harness being installed on a 2007 model which will be very...
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  • Replacement 7-Way and 4-Pole Trailer Connector for 2010 Toyota Tacoma with OEM 7-Way
  • According to Hopkins, their # HM43385 is compatible with the 2003-2007 Tundra, but not the Tacoma. Since you already have the OEM 7-way, and you are simply wanting to add a 4-pole, you could just use part # 118384. This is a T-connector that will plug inline with the factory harness that plugs into the rear of your 7-way. Installation would be simple. Unplug the factory harness from the rear of your existing connector, plug the 4-pole inline, and install a bracket like # 18144 for the...
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  • Using 4-Pole Trailer Adapter Part # 118384 for Tailgate Light Bar on 2008 Silverado
  • You are absolutely correct. The 4-Pole Trailer Adapter part # 118384 would plug inline to the connector for your existing 7-way trailer connector. If you need a mounting bracket for the 4-Pole, we offer part # 18144. To see the installation instructions for the Adapter, click on the link below.
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  • Is Under Car Trimming Required for Installation of Hitch # C13065 on a 2011 Dodge Grand Cherokee
  • For installation of the Curt Trailer Hitch, # C13065, on your 2011 Jeep Grand Cherokee, you will need to trim excess caulk on vehicle frame rails, only if it interferes with hitch installation, see instructions link. I have added a photo showing where the excess caulk is likely to interfere and need to be trimmed. No part of the bumper or fascia will need to be trimmed. You may be interested in the following items to complete your trailer hitch setup. Trailer Wiring, # 118425 (without...
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  • 4-Pole Trailer Wiring Harness for 2014 Volkswagen Tiguan
  • The TowReady T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118384 that you referenced is not a fit for the 2014 Volkswagen Tiguan. This 4-pole harness uses a standardized round U.S. Car Connector to plug in to the vehicle wiring and your Tiguan does not use this type of connector. Currently there is one confirmed fit for a 4-pole trailer wiring harness for your vehicle and it is a hard-wired type converter, part # 118675 from Tekonsha. This kit installs at the tail...
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  • Troubleshooting Trailer Lights When Trailer is Connected to 2004 GMC Sierra 1500 4X4
  • It sounds like a problem with the ground or wiring on the trailer, but it would be wise to check all of the components in your wiring system. You can test the trailer connectors on the 2004 GMC Sierra and the trailer with a circuit tester like the Quickee Tester, part # 3808. I am including a link to a FAQ page on trailer wiring that will show you the functions of each pin on your connector, depending on if it is either a 4-Way, 5-Way, 6-Way, or 7-Way. This will help you determine if...
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  • Can Rear Fascia Panel be Replaced After Installing Curt Trailer Hitch # 13424, 2011 Chevy Traverse
  • You will notice in the instructions that I have linked for Curt Trailer Hitch, # 13424, that it states that the panel in question may be reinstalled on some models. So I spoke with my contact at Curt to determine if the 2011 Chevy Traverse was a model that it could be reinstalled on. He stated that they did not have information on the 2011 but on the 2010 it can be reinstalled. Basically, if the rear fascia is the same on the 2011, then it will fit. But if it has been redesigned, it...
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  • Installing Trailer Wiring Harness on 2013 Nissan Xterra w/out Tow Package
  • If your Xterra was not equipped with the factory tow package the port under the vehicle where the 4-pole trailer connector like part # C55441 plugs in will NOT be fully active. There is a jumper harness and relays that are needed to activate the tow package. The Tow Ready # 118525 that we offer includes the 4-pole that plugs into the connector along the drivers side frame rail alongside the spare tire, as well as the jumper harness and relays. The relays plug into the jumper harness,...
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  • Does The Draw-Tite Class III Hitch # 75699 Fit Under The Bumper On A 2011 Jeep Grand Cherokee
  • The Draw-Tite Class III 2 Inch Hitch, part # 75699, will install under the bumper on your 2011 Jeep Grand Cherokee. I am including a picture to the right that will show the proper position of the hitch on a Jeep Grand Cherokee. Also, I am including a link to the installation instructions for the Draw-Tite hitch. If you will be towing with this hitch you will want to check your owners manual or the Jeep dealer for the towing capacity of your 2010 Jeep Grand Cherokee. To complete...
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  • Trailer Running Lights Blow a Fuse on a 2005 Chevy Silverado when Towing Different Trailers
  • There is either too much power draw from the trailer lights when the running lights are on (if the trailers have a lot of running lights, this is possible) or there is a short in the trailer connector, vehicle side or wiring somewhere. You can check the amperage draw of the lights by looking at the light housing where the wires attach. There may be information on how much power draw the lights require. Otherwise, you would need to use a multi-meter like # BTMT15 if needed to test the...
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  • Trailer Lights Not Working When Using Tow Ready Wiring Harness, # 118384, On 2007 Nissan Titan
  • The Tow Ready Wiring Harness, # 118384, is for a Nissan Titan with the factory 7-Way trailer connector. It will plug into the back of your 7-Way on your vehicle and the other end will plug into the tow vehicles trailer harness connector, behind the bumper on the drivers side. This harness does not come with relays because they are usually installed already when the factory 7-Way is on the vehicle. You might check the accessory fuse block to make sure you have the three relays installed...
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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael L
Video Edited:
Zack K
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Expert Research:
John H
Expert Research:
Brandon M
Expert Research:
Adam R
Video by:
Kathleen M
Updated by:
Laura H
Video Edited:
Dustin K
Expert Research:
Rachael H
Expert Research:
Jeffrey L
Test Fit:
Randy B
Video Edited:
Chris R
Updated by:
Sarah W
Video by:
Zach D
Test Fit:
Brent H

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