Price: $44.32

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

Item # 118418

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tekonsha custom fit vehicle wiring 4 flat t-one harness with 4-pole trailer connector
tekonsha custom fit vehicle wiring converter 4 flat 118418
tekonsha custom fit vehicle wiring trailer hitch 4 flat t-one harness with 4-pole connector

  • Custom Fit
  • Trailer Hitch Wiring
  • Tekonsha
  • 4 Flat
  • Converter
Call at 800-298-8924 for expert service. We are your Saturn custom fit vehicle wiring experts, and offer a lowest price guarantee. carries a complete line of Tekonsha products for your Saturn Vue 2007. T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part 118418 from Tekonsha can be ordered online at Complete custom fit vehicle wiring installation instructions and technical support.

2007 Saturn Vue - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Quickly and easily install a 4-way trailer connector on your Saturn Vue with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Circuit-protected converter guards against shorts.


  • Provides a 4-way flat trailer connector at the back of your Saturn Vue to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind tail lights
    • Plug in T-connector
  • Includes circuit-protected tail light converter to ensure that your Saturn Vue's wiring matches that of your trailer
    • Provides protection against electrical shorts and overloads
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 4.2 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your Saturn Vue's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness.

T-One Connection Location Points Behind Tail Lights

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

Circuit-Protected Tail Light Converter

A tail light converter is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your Saturn Vue's three-wire system need to be combined so they are compatible with the wiring system of your trailer. The tail light converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your Saturn Vue operate.

This converter safeguards itself and your vehicle against possible electrical shorts and overloads with integrated short circuit protection. Just install the connector as indicated and rest assured that the wiring system of your vehicle will remain feedback-free.

118418 Tow Ready T-1 T-Connector - 4 Wire

118418 Installation InstructionsInstallation Details 118418 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 118418 Review

Today we're going to be taking a look at the T1 vehicle wiring harness with the 4 pull flat trailer connector. This product fits a 2002 to 2007 Saturn Vue. The unit is going to provide a 4 way flat trailer connector at the back of the vehicle to power your trailer signal lights. It is compatible with 5 pull, a 6 pull, and 7 pull adapters. Adapters are sold separately. It's going to come with a dust cap for the 4 way flat connector.

That way you can cover up the connection points when the plug is not being used. The black box right here, this is going to be the included taillight converter, this is going to insure that your vehicles wiring matches that of your trailers. It's going to provide protection against electrical shorts and overloads. Now, this systems going to connect quickly and easily, you don't have to worry about cutting or slicing any wires. All you have to do is look at the connection points behind your taillights, so there's going to be one connection point on the passenger side of your vehicle, and there's going to be one connection point on the driver side of your vehicle. You got 2 sets of connectors, so you find those connection points and then you plug each side into its correct location. Now, these plugs are going to match up perfectly with the plugs on the vehicle, they are going to snap-lock together for a nice tight secure fit.

Once you have the T connectors plugged in, you'll need to make a ground connection. Your ground wire is going to be your white wire with the attached ring terminal. You want to get that grounded to a nice clean metal surface with the included grounding screw, then you can mount the converter box. That's going to be the black box, you can get that mounted to a nice clean out of the way area using some zip ties, or you could use some adhesive tape. it does have a mount hole right there so you could actually use a screw as well to get that secured. Multiple options to get that mounted.

Once you have all that done you'll need to secure any excess wires that you have or slack in the wiring, with the included zip ties. Just clean up the installation and keep your wires safe and secure. Then once your installation is complete, the 4 way connector is going to be stowed beneath the vehicle near the trailer hitch. You can loop it around a safety chain loop, or you could use a mounting bracket. Those are going to be sold separately but we do recommend a mounting bracket to keep the connector secure.

It's also recommended you use a small amount of dielectric grease on all your electrical connections, and the 4 pull connector itself, that way you can make sure those connection points are going to be protected from corrosion. That grease is sold separately, dielectric grease you know find it right here the maximum amps for the stop and turn lights s 2.1 amps per circuit. For the taillights we're looking at 4.2 amps per circuit. The unit also comes with detailed installation instructions to walk you through the whole process step by step. That's going to do it for today's look at the T1 vehicle wiring harness with the 4 pull flat trailer connector.

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118418

Average Customer Rating:  4.9 out of 5 stars   (53 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your Saturn Vue with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Circuit-protected converter guards against shorts.

- 118418

by: jeff g12/19/2015

fast service low price 233979


still working

jeff g - 12/18/2016


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by: Chris09/13/2012

I recently purchased the 118418 T-connector for my Saturn Vue to haul a Scout Trailer. Watched the video once and had this installed in 15 minutes. Super simple to install and use. Since I have a Reese tubular hitch, I had to buy an adapter to mount the plug in an odd place, but the connector itself works and that is all I need it to do. E-trailer made it extremely simple to install a trailer light hook-up, in fact, I will be ordering another one soon for another vehicle and will have my 13 year old son install it. 54603

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by: Nick m09/27/2012

I've had a trailer hitch for about 3 yrs now but nobody had a quick connect wiring harness till I found this one. I didn't follow the directions to an exact "T" because I wanted my 4-flat plug to stay inside the car unless I'm hauling somthing. But I had the whole thing installed in about 20 mins. Best investment I've made. I'm trailering my new motorcycle next week. At least now I won't have to borrow trucks and such. I can go buy my own trailer. Worth the extra $ for quick connect. Solid product 55958

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by: Danny B.11/05/2014

Everything came in quick and correct. My threaded bolt holes in the frame of my vehicle were a little rusty, so I had a little trouble cleaning the rust out to receive the bolts that came with the hitch. I was not surprised though because the video I watched showed me how to clean out the bolt holes. Also two of the bolts would not go all the way in. Went to local hardware and bought two shorter bolts and fixed problem. Overall pretty simple. Would highly recommend. 159515

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by: James F.03/19/2012

The video made it easy. Popped a few of the wheel well "buttons" out and fed the wiring through the taillight assemblies. You can tuck the wiring up in the fascia or tie to the hitch frame, either way you really won't see it. We just hooked up the ground to the the quarter panel retaining bolt since it was right there anyway. No need to drill a hole in your vehicle. Tested the lights once it was all set up, no problems on either the Vue or the trailer. 34324

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by: Jud S.04/16/2014

The product was as expected and well assembled. The directions were aided greatly by the Your Tube video and installation time was much less than expected. Because of the video I expected the mounting plate for the 4 pin connection this, however, was simply my mistake and I can order that bracket separately. Over all I am very pleased withthe product and ease of installation. Well done! 125370

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by: Heather R.06/30/2011

Our order included everything that we needed. It arrived ahead of schedule and included clear written instructions. The online videos were extremely helpful as well. I highly recommend to anyone looking to install a trailer hitch. It makes it easy even for people with no automotive experience. Great job!!! 18268

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by: Larry W.11/04/2012

Great product and service! Ordered wiring harness on Saturday, had it by Tuesday.Instructions were spot on and easy to follow. Didn't have to cut and splice any wires, everything plugged right up, wires were the perfect length, took less than an hour. I wish all my "projects" were this easy.Thanks! 58810

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by: Dennis02/12/2013


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by: Jaykuul05/10/2012

Kit is exactly like the picture and vids, easy as pie to install. Like everyone has stated, the wire to fish through is too short, needs to be longer but I guess they need to save costs lol. If you expand and flatten the wire completely straight, its just long to reach through. 39960

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by: Frank O09/08/2016

Hitch and wiring harness fit perfectly on our 2005 Saturn Vue. Will use to pull fishing boat to Texas from Colorado. No issues that aren't common to any after market products. Checked order by phone, those folks were helpful. Like the product and the price. 292534

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by: Ned P.08/16/2014

A high quality product. However, the installation wasn't as fast and easy as the video and other reviews indicated. It took two of us over two hours to do the job. A hoist is advised-we used a roller jack. Once installed, the harness worked perfectly. 147004

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by: Joe G.05/24/2014

The wiring harness turned out great, but when I read the installation instructions, I did not have the required tools to install it myself and had a local service shop install it (cost only $35). His installation was perfect. 132275

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by: Mark D.09/12/2011

Should have watched the video before trying to do this by the written directions. I tried with the written directions and figured it out but went back to the video and acutally did it right. Make sure to watch the video. 23754

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by: Jared J.04/05/2012

The harness went in exactly as expected and works perfectly. The wire lengths were good and the instruction were clear. Some disassembly of the vehicle was necessary, but no permanent modifications were needed. 36205

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by: Stephen05/22/2014

Great Service. I had an issue with the wiring harness. emailed customer service and they got back to me right away. replacement part was shipped and was up and running two days later. Thanks 131794

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by: Fred J.01/24/2011

You guys and girls are fantastic. Great service, nice people with a delivery that far exceeded my expectations. All I can say is WOW. I would gladly refer my friends to eTrailer. 6019

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by: Richard02/04/2013

Other than taking quite a bit of time chasing the threads in the frame rails, install with off with a problem. Really liked the wiring harness. Easy plug in again no problem. 64907

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by: Bob G10/29/2014

Hitch arrived quickly, fit perfectly, install was very simple. Wiring harness was little more involved (due to removal of plastic panels)but directions were well written. 158349

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by: Dave M.02/23/2017

I am very happy with the T-One wiring harness, and was amazed at the ease of connecting it to my vehicle. instructions and video made it a breeze. Thank you so much!! 344723

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by: Dave K.09/16/2011

I found this through YouTube, excellent! From now on, I don't go to the store, I go to The item came in three days, perfect for my weekend project. 24052

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by: Dewey C.05/06/2012

I bought the trailer hitch and wiring harness for my 2007 Saturn Vue. The service I got was excellent. The products were in excellent condition. 39534

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by: Gary I03/06/2017

Item arrived sooner than expected and was a perfect fit, unlike what I've purchased from other sites. Great service and price. 349173

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by: Gary T.05/05/2011

The product fit and worked just fine. A nice addition would be to add a cd to yhe kit with the video that's on your web page. 12924

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by: OC09/28/2017

really easy to install! the video e trailer has for this was a huge help. great product, looks like it will hold up well. 437277

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by: Hub D.01/20/2012

Easy to install, used coat hanger to pull the plugs down and up and did not need to take the fender well apart. 30012

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by: Sarge10/20/2016

It fit great thanks this was a simple way to get the extra stuff that i have to be moved and for future trips 309114

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by: Ron K.12/23/2011

this is the second one i purchased and came back because the first was so easy to install. great product. 28633

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by: Rob W04/09/2011

Instructions were complete and installation was a breeze. Delivered quickly and fit our Vue perfectly. 11402

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by: David J.07/22/2011

This part came in very fast and it fits just right and work great. thank you. David Johnson 19882

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by: Bo L.04/17/2012

Super easy installation, video instructions were most helpful, one happy customer 37470

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by: Matt S03/15/2012

I have no auto repair experience and I had no problem installing the wiring kit. 34031

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by: Farrell L.04/08/2011

Fully installed hitch and electrical in about two hours. No problems at all. 11376

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by: Bryan B04/29/2011

Wiring harness was easy to install with those factory connectors. A+++ 12575

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by: Art T07/09/2014

Quick delivery, full instructions....Will definitely use them again 140246

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by: William Green06/16/2011

The trailer wiring harness was exactly as advertised. Works great! 17123

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by: Rick B.05/11/2011

Quality product and very useful video on installation. Thank you ! 13317

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by: Bill S.07/04/2016

Fit as expected with absolutely no problems. I be happy. :-) 268117

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by: Nate k06/10/2016

Using the video. Super easy to install. Would do this again. 259881

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by: Jason- Minneapolis07/07/2013

Quick shipping, fits perfect, and great how to video online! 88026

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by: Craig V06/25/2011

Very good and easy to install no time at all Will be back.... 17946

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by: Tim M01/19/2012

Installation went well with the very adequate instructions. 29942

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by: Al G.11/16/2012

Product was exactly as described and very easy to set up. 59538

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by: Sunfish Bill Osborne10/24/2013

Easy installation - excellent instructions. It works! 104988

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by: Earl W.04/20/2017

Fits perfect no wire cutting installed in 10 minutes 370244

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by: Brian E04/04/2012

Quick installation for flawless wiring of a trailer. 36145

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by: Pat V07/14/2016

Excellent service- fast delivery! 271824

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by: Paul05/22/2016

Exactly what I needed Great info 251092

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by: E. G. B.04/06/2011

Fit good. No problems to install. 11237

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by: stefanP04/04/2016

All fit well.Great deal. 242918


Trailer hitch and all products working great

stefanP - 04/04/2017

Show More Reviews

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

  • If there is a Short Circuit Will Curt Converter Box Blow or Just the Affected Circuit
  • Normally when there is a short circuit it will blow the converter box no matter what the brand is. But sometimes it will only affect the one function that shorted like what you have experienced. It could go either way but regardless of what does happen you would need to replace the converter to fix the issue. We do have the plug in style T-connector # 118418 that you can use instead of a hardwire harness if you hare interested. I have linked instructions and a video for you to view. You...
    view full answer...

  • Parts Needed to Tow a Trailer with a 2006 Saturn Vue
  • First, be sure to consult your vehicle owners manual for specific information on towing with your vehicle. There are a few components needed to tow a trailer staring with the trailer hitch. First, there are Class II and Class III hitches available for your 2006 Saturn Vue. I recommend a Class III trailer hitch, # 13591, because it has a higher capacity and the 2 inch receiver is compatible with more accessories. Basically, with a Class III hitch you have more options. Next you will need...
    view full answer...

  • Trailer Hitch, Wiring and Brake Controller Recommendation for 2005 Saturn Vue
  • If the goal is to tow a trailer with your 2005 Saturn Vue I have a better setup for you to consider. For a trailer hitch the Draw Tite part # 76028 has the best capacities and since it's a 2 inch hitch it will give you the best options for future accessories and ball mounts. For trailer wiring the Tekonsha brand is the most reliable so for your vehicle the best option would be the # 118418. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller....
    view full answer...

  • Recommended Trailer Hitch for 2006 Saturn Vue
  • The difference is that the 2006 Saturn Vue Red Line models require noticeable rear fascia trimming when installing a trailer hitch. The Red Line models also have a lower suspension. For either model I recommend a Class III trailer hitch like the Curt hitch, # 13591, because it has a higher capacity and the 2 inch receiver is compatible with more accessories. I have included a video of this hitch being installed on a similar vehicle. To complete your towing package I recommend Ball...
    view full answer...

  • Hitch Recommendation for a 2007 Saturn VUE Hybrid
  • Yes, I checked with Curt and the Curt Hitch part # 13591 that you referenced has been confirmed to fit all styles of the 2007 Saturn Vue so it will fit the hybrid models like what you have. I attached an install video for you to check out as well. If you plan on doing some towing you might be interested in 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...
    view full answer...

  • Adding a 7-Way Trailer Connector to a 2006 Saturn Vue
  • In order to add a 7-Way trailer connector your Saturn Vue you will first have to install a 4-Way using # 118418. Then to add a 7-Way you have 2 options. If all you want is for the lights to work on the trailer when you tow it with the Vue then you would need # 37185. You would ground the white wire and the other wires can be capped off and stowed out of the way. If you want all the functions of the 7-Way to work you would install the 4-Way but use # ETBC7 to add the 7-Way. If the trailer...
    view full answer...

  • Do Torque Specs for Installation of a Trailer Hitch on a 2003 Saturn Vue have to be Followed
  • On a 2993 Saturn Vue you should be fishwiring in 1/2 inch bolts and blocks through the frame and to the bolt holes on top of the hitch as indicate in step 5. The bolts that get fishwired in are 1/2 inch carriage bolts. It is important to get the bolts to the proper torque spec. If they are too tight you can damage the hitch and vehicle. If they are not tight enough you could loose the hitch. Most auto parts stores will loan out tools. You will need a torque wrench that goes up to at...
    view full answer...

  • Troubleshooting # 118418 T-One Vehicle Harness Installed on Saturn Vue
  • Whenever trailer lights exhibit strange behavior, its typically a result of a poor ground connection. It sounds like you have done a wonderful job of troubleshooting up to this point. The only thing it appears you have not checked is the grounding point on the vehicle side of the equation, where you have the ground wire for the converter attached. Another quick method of troubleshooting is trying the trailer on a different vehicle or the vehicle with a different trailer (if possible)....
    view full answer...

  • Short Circuit on Trailer Caused Trailer Wiring Harness on 2008 Saturn Vue to Blow
  • What probably happened was that the converter box has blown. This means that it has done its job. The short on the trailer blew the box instead of damaging the vehicle wiring. There is no fix for this and the wiring harness on the vehicle will have to be replaced. You will need to make sure that the short circuit has been fixed prior to installing and using the new harness. Otherwise the same problem will keep happening until the short is fixed. I have included a couple of wiring FAQs...
    view full answer...

  • 4-Way to 5-Way Adapter Recommendation for a 2005 Saturn Vue for Trailer with Reverse Lockout
  • I am glad to hear that the Tow Ready Wiring Harness part # 118418 is working great in your 2005 Saturn Vue. All you would need to convert the 4-way of this harness to a 5-way to activate the reverse lockout of your trailer is a part # 20036. You will need to tap into the reverse light circuit of your Vue using the included quick-splice. I attached an installation video for the # 20036 for you to check out also.
    view full answer...

  • Installing a Universal Trailer Wiring Harness on a 2003 Saturn Vue
  • I assume the video that you are referencing was the installation video for the universal trailer wiring harness, part # 119130, on a 2003 Saturn Vue. I have attached the video below. At the 3 minute and 16 second mark, our installer connects the Blue brake light wire from the Saturn Vue to the Red brake light wire from the trailer wiring harness. If you are referencing a different video, let me know so I can clear up any confusion. The 2003 Saturn Vue uses a separate tail light wiring...
    view full answer...

  • Trailer Wiring Harness Recommendation for a 2005 Saturn Vue
  • The recommended trailer wiring harnesses for your 2005 Saturn Vue are ones with converter boxes like the part # 118418. That being said our installer was able to find a way to wire in the part # 18002 to a 2004 Vue similar to yours. This isn't the ideal solution, but it would work if you used the install video as a guide. I attached install videos for both harnesses for you to check out.
    view full answer...

  • Trailer Wiring Harness for a 2004 Saturn Vue
  • The 2004 Saturn Vue used in the video, linked for reference, for wiring harness # 18002 has a factory tow package wire bundle. The factory tow package wire bundle already has the turn signal and brake light signals combined to wire in a 4-Way directly. No converter is needed. Otherwise you would use wiring harness # 118418 which does have a converter to combine the separate signals.
    view full answer...

  • Trailer Hitch and Wiring Recommendations for a 2007 Saturn Vue
  • We make videos based on what vehicles customers bring to us for installations. The 2007 Saturn Vue was built on the same platform (the GM Theta platform) as the Chevy Captiva Sport and Equinox, The Pontiac Torrent, and GMC Terrain, among others. Only the bodies where different so the videos shown for those other vehicles can still be used as good guides when installing a hitch on the Vue. As for the comments/reviews that is just coincidence. Draw-Tite hitch # 76028 does fit your Vue....
    view full answer...

  • Will Curt Trailer Hitch 13591 Fit All Models of the 2005 Saturn Vue
  • The Curt trailer hitch # 13591 does fit a regular 2005 Saturn Vue. And it fits the Red Line like you said. So it will work for your 2005 Vue. Curt, Draw-Tite, and Hidden Hitch all make good hitches so the preference is yours. I have linked a video showing installation of the Curt hitch for you. To complete your towing set up I recommend etrailer ball mount kit # 989900. It includes 2 ball mounts, 2 balls, a hitch pin with clip, and a storage bag. And for trailer wiring you can use Tow...
    view full answer...

  • Will the T-one Vehicle Harness Part #118418 Fit the 2003 Saturn Vue Redline
  • No, I am sorry you will have to hardwire your 2003 Saturn Vue Redline to have trailer lighting available at the rear of the vehicle. If you need a 4-way flat connector you could use the Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit, part # 119179KIT, which will include all wiring and connectors to complete the wiring along with instructions. You will have to remove the vehicle taillights and splice into the vehicles wiring using a circuit tester, part number...
    view full answer...

  • 4-Way Trailer Wiring Harness Recommendation for a 2006 Saturn Vue
  • Since your 2006 Saturn Vue has separate turn signal circuits from the brake lights you would not be able to hardwire a 4-way directly to the taillights like with the part # 18004 that you referenced. Instead you would need a harness that has a converter built into it so that the circuits are adapted to what a 4-way requires. For that we have the part # 118418 which is a confirmed fit and would work well. This plugs in line with your vehicle taillight harnesses and does not require...
    view full answer...

  • Cargo Carrying Options For 2007 Saturn Vue With Naked Roof
  • We do not offer a roof rack that will work with your 2007 Saturn Vue, but we do have some options that may work for you. My best recommendation is to install a trailer hitch like the Draw-Tite Trailer Hitch, part # 76028. This is a Class lll hitch and it has a 2 inch receiver opening. Installing a trailer hitch will give you many options for carrying items like bike racks or cargo carriers. You can also tow a trailer behind your Vue. If you plan on towing with your Vue I recommend...
    view full answer...

  • Trailer Hitch and Wiring for a 2007 Saturn Vue
  • Actually, if you were to try to install Curt hitch # C19101 it would require a lot more work than the custom fit hitches for your 2007 Saturn Vue. You would have to access the metal bumper beam which would require removal of the rear fascia. Then once you get that removed it is possible, even likely, that the hitch will not fit. Installation of a custom hitch such as # 13591 is much easier as you can see in the video I have linked showing an example installation. I have also included...
    view full answer...

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

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Info for this part was:

Test Fit:
Joe V
Expert Research:
Michael L
Expert Research:
Michael H
Video Edited:
Joshua S
Test Fit:
Nicholas E
Expert Research:
John H
Updated by:
Laura H
Installed by:
Cole B
Video by:
Sue W
Updated by:
Sarah W

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