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Trailer Wiring > 2003 > Chevrolet > TrailBlazer

Tow Ready Custom Fit Vehicle Wiring for the 2003 Chevrolet TrailBlazer

Tow Ready Custom Fit Vehicle Wiring

ratingratingratingratingrating (103 reviews)


Code:   118384

Retail:$37.18

Price:$30.95


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Shipping Weight: 1 pounds

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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 2003 Chevrolet TrailBlazer

Quickly and easily install a 4-way trailer connector on your Chevrolet TrailBlazer. 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 Chevrolet TrailBlazer 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 Chevrolet TrailBlazer'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 Chevrolet TrailBlazer, 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



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.

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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:  ratingratingratingratingrating4.9 out of 5 stars   (103 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle. 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

ratingratingratingratingrating 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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ratingratingratingratingrating 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

$0.00
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

$0.00
.

Patrick B - 9/21/2012




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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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






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ratingratingratingratingrating 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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ratingratingratingratingrating 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






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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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






- 118384

ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating 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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ratingratingratingratingrating by: Shayne T.05/14/2014


This is a great idea. I am going to use this to power my tailgate light bar. This saves so much time and hassle. Thank you etrailer for this great item. 130672






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ratingratingratingratingrating by: Dennis C.07/03/2013


WAS VERY IMPRESSED WITH THE T ONE WIRING HARNESS AND THE SHORT AMOUNT OF TIME IT TOOK TO SHIP.I WOULD USE E TRAILER AGAIN THANKS FOR THE GOOD SERVICE. 87520






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ratingratingratingratingrating by: Steve W.01/08/2012


Excellent product and service, fit perfect as described and took about 5-10 minute to install !!!! No cutting or splicing of wires, VERY NICE !!!! 29289






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ratingratingratingratingrating by: Josh P.05/10/2012


So easy that I showed my 7 year old how to do it, and i am not even kidding. He points out where the connector goes on every GMC he sees. 39953






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ratingratingratingratingrating by: Bill K05/12/2011


Adapter harness for my 08 Chev Silverado 1500 fit perfectly and I used it to hook up a Fire and Ice Light strip on the back of my truck. 13657






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ratingratingratingratingrating by: Tibor H.03/04/2012


It was a very easy installation process, all I have to do now is ops check it with the trailer. I would highly recommend this product. 33084






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ratingratingratingratingrating by: Jim07/04/2012


I haven't installed the product yet but it looks fairely simple to install. The shipping was fast and the product was as advertised. 46708






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ratingratingratingratingrating by: John L.12/05/2011


Great product selection. Had exactly what I was looking for. Fast service with excellent e-mail follow-up information re shipping. 27736






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ratingratingratingratingrating by: Mike01/07/2014


Item worked perfect!!!! Took less than a minute to install. Took longer to arrive than expected but still very happy with it! 112134






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ratingratingratingratingrating by: Barry02/09/2014


Plugged t-one wiring harness to existing factory harness to use my led tailgate lights. Took all of 10 minutes. Great harness! 116125






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ratingratingratingratingrating by: Nick01/02/2013


Product works as described and it very simple to install. Shipping was on time and everything was great. Will buy from again! 62379






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ratingratingratingratingrating by: Raymond Housler07/22/2011


This adapter made adding a 4 flat plug to my 2009 GMC Denali Truck a Breeze only took about 5 mintes to hook up. Great Product 19937






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ratingratingratingratingrating by: Mathue01/21/2013


Exactly as described. Work Perfect! I used it for the 3rd taillight bar under my tailgate so that all the wiring is hidden. 63685






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ratingratingratingratingrating by: Eric M.05/01/2012


Just like the informercial on your website shows you, takes seconds. I also put the trailer hitch on in about 15. Easy... 38968






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ratingratingratingratingrating by: Tony J.05/17/2011


e-trailers prices were very competitive and the item was shipped quickly and an easy t install. thanks e-trailer. Tony 14544






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ratingratingratingratingrating by: Banjo05/23/2011


Just plug and play, I like that. Would like see a little dab of dielectric grease on the adapter part of the plugs. BP 15123






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ratingratingratingratingrating by: Herb A.06/12/2013


This as simple as it gets to install. 15 minutes and you are completely done and ready to hook up to your trailer.. 84312






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ratingratingratingratingrating by: Cliff03/18/2013


Professionally Done. Installed in less than 3 minutes. 71320





Comments

Installed this product one year ago, still a great buy..

comment by: Cliff - 03/18/2014


3161



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ratingratingratingratingrating by: marcus simpson09/11/2013


The wiring harness was easy to install and the twist in connector fit good Insructions were easy to follow. 99472






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ratingratingratingratingrating by: Paul Bradbury01/04/2014


The adapter worked flawlessly and as advertised. It took all of 5 minutes to install. Great product! 111889






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ratingratingratingratingrating by: John M06/28/2013


Took me less then 5 mins to install. The video was. Great help. Product looks clean and works great. 86620






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ratingratingratingratingrating by: Wilburn01/23/2013


Haven't installed yet but expect it to do everything I want it to do. Looks like a quality product. 63945






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ratingratingratingratingrating by: JOHN G06/22/2012


Easy to install - does what it is suppose to do. I now have both 7 & 4 pinn connections on my truck. 45208






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ratingratingratingratingrating by: Neil C06/13/2011


Product as described and fast shipping. 2nd time using etrailer and they are 2 for 2. Thanks!! 16876




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Ask the Experts about this Tow Ready Custom Fit Vehicle Wiring
Expert Answers about T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118384Do you have a question about this Custom Fit Vehicle Wiring?


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  • Location of Factory Connector for Trailer Wiring on 2006 Chevy Silverado 1500
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  • Is Under Car Trimming Required for Installation of Hitch # C13065 on a 2011 Dodge Grand Cherokee
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  • Replacement 7-Way and 4-Pole Trailer Connector for 2010 Toyota Tacoma with OEM 7-Way
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  • 2005 Nissan Titan Trailer Lights Not Working Using Tow Ready Wiring Harness
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  • 7 to 4-Way Adapter for 2010 Buick Enclave w/ Factory Tow Package
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  • 4-Way to 7-Way Wiring Adapter
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  • Availability of a Trailer Hitch that Will Fit a 2011 Dodge Durango with an 18 Inch Spare Tire
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  • Is there a Quick Connector Trailer Wiring Harness Available for a 2011 Jeep Grand Cherokee
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  • Adding a 7-Way Trailer Connector to a 2012 Dodge Ram 2500 Big Horn With Flatbed
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  • Trailer Wiring Harness for a 2011 Toyota Tacoma Access Cab
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  • 4-Way to 7-Way Trailer Connector Adapter for a 2012 Toyota Tundra
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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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  • 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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  • Can a 4-Way Flat Trailer Wiring Connector be Added to a 2010 Chevy Silverado
  • A 7-way will have a round socket and blade-style pins in it. The 2010 Silverado would either have a 7-Way connector or no connector. If the connector is present, use a circuit tester like the Quickee # 3808 to test the function on the pins while someone sits in the truck to turn them off and on while you test. If there is no connector, you would need to install # PK11916. All of the wiring will already be present, you would just need to plug this connector in. If you wanted to change...
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  • Can the Fascia Door Be Replaced Over the Hitch Opening on a 2009 GMC Acadia
  • I spoke with my contacts and on the 2009 GMC Acadia the fascia door will not be able to be reinstalled over the hitch after any of the available trailer hitches have been installed. They will all protrude just a little too far. What you can do to block some of the hitch from view would be to use a hitch cover. All of the hitches for your vehicle have a 2 inch receiver so you would use a cover for a 2 inch receiver. We have many hitch covers to choose from. I have included a link to the...
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  • Installation of Tekonsha P-3 on 2005 GMC Envoy Denali
  • Does your Envoy Denali have the tow package with the 7-way trailer connector on the rear of the vehicle? If so, you would just use the loose tow package wires that are already located under the dash. The circuits involved are already circuit protected, no additional circuit breaker is required. We have an installation video showing how to locate the tow package wiring and how the wires would match up with your brake controller. I will provide a link to the video below. If your Envoy...
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  • Trailer Hitch Recommendation for a 2011 Jeep Liberty
  • You may not believe this but even the Class II trailer hitches for a 2011 Jeep Liberty have the face of the receiver extend beyond the rear bumper of the vehicle. Since this is the case, I would go ahead with a Class III. If you are going to have bruised shins, might as well be from a hitch with a higher capacity and more accessory options. For a Class III hitch I recommend the Draw-Tite Trailer Hitch, # 75578. I have included a link to the installation instructions. In the upper left...
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  • How Does the Factory Connector on a 2006 Chevrolet Silverado Pickup Work
  • The 4-Pole Trailer Adapter for GM trucks with Factory 7 Way, item # 118384, does not operate a 7-way connector. This item uses the vehicles factory wiring harness which can power a 7-way connector and adapts it to a 4-way connector only. If you want a 7-way connector at the rear of your vehicle you can use, part number 30955 which will give you a 7-way connector and a 4-way connector at the rear of your truck that will be wired from the factory connector that is located above the spare...
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  • Installing the 4-Pole Trailer Adapter # 118384 on a 2010 Chevy Avalanche
  • The 4-Pole Trailer Adapter for GM trucks with Factory 7 Way, # 118384, is meant to plug in line with the factory wiring and provide a 4-Way flat connection. The 4-Way will provide left and right turn signal functions, brake light functions, and running light functions. The reverse light circuit will not be used or needed. I have included a link to the installation details below. If your 2010 Chevy Avalanche does not have a factory connector, you can add a 7-Way by using Twist-in, 7-Pole,...
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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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  • Compatability of the Replacement Multi-Tow 7-Way & 4 Pole Connector with 2008 Chevy Silverado
  • Yes, the Replacement Multi-Tow 7-Way & 4 Pole Trailer Connector, item # 20119, will work as a replacement for your factory connector. This connector does not install in the original factory location without drilling (see video) and will have to be mounted near the hitch with the included mounting bracket if you do not want to drill mounting holes in the bumper. If you would like to retain the factory 7-way connector and just add a 4-way connector you could use the 4-Pole Trailer Adapter...
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  • Trailer Hitch, Ball Mount, Ball, and Wiring Recommendations for a 2005 GMC Yukon XL 1500
  • There are some variations regarding the attachment points for Draw-Tite Trailer Hitch, # 45013. The attachment points required can be found on 3/4 ton and 1 ton models of the 2005 Yukon XL, but not on the 1/2 ton. However, we do carry 2 hitches that have a greater capacity than your current 8,000 pound hitch. First is the Draw-Tite Ultra Frame Trailer Hitch Receiver, # 41930, with a gross trailer weight capacity of 10,000 pounds and tongue weight capacity of 1,000 pounds. You can also...
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Expert Answers about T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118384Do you have a question about this Custom Fit Vehicle Wiring?



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