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ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

Item # 119250KIT
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Tekonsha Trailer Wiring - 119250KIT
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Install a 4-way trailer connector on your vehicle without cutting or splicing into your wiring. Zero-contact interface sensors identify the current flowing through each wire by simply clamping onto it. Circuit-protected module is made using SMT. Lowest Prices for the best trailer wiring from Tekonsha. ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit part number 119250KIT can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Tekonsha Trailer Wiring - 119250KIT

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • Tekonsha

Install a 4-way trailer connector on your vehicle without cutting or splicing into your wiring. Zero-contact interface sensors identify the current flowing through each wire by simply clamping onto it. Circuit-protected module is made using SMT.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole, and 7-pole adapters (sold separately)
  • Bypasses factory wiring and involves no cutting, splicing, or plugging into vehicle's wiring
    • Sensors clamp onto the wires of your factory tail light wiring harness to detect current
    • No feedback, no interference with, and no power draw from your vehicle's wiring system
    • Easily removable and transferrable between different vehicles
    • Circuit tester included to ensure proper setup
  • Includes circuit-protected module that connects directly to car battery for power
    • Power wire, fuse holder, and 15-amp fuse included for installation
  • Works with 2-wire, 3-wire, PWM, and multiplex wiring systems
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


Specs:

  • Application: vehicles with 12V electrical systems
  • Maximum amperage:
    • Stop/turn lights: 4.2 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


This revolutionary wiring method makes it fast, easy, and safe to add a 4-way connector to your vehicle so you can power your trailer's lights. Unlike traditional tail light wiring harnesses, which either splice into your vehicle's wiring or plug into designated ports in your factory harness, this system bypasses your vehicle's wiring entirely. Just clamp the intuitive sensors onto the individual wires of your OEM tail light harness and let the ZCI system do the rest.


Zero-Contact Interface Sensors

Sensor

Each zero-contact interface (ZCI) sensor included with this harness is able to read the current that travels through the wire it is clamped onto. Upon sensing the specific modulation of that wire, a signal can be sent along the wire that connects the sensor to the included 4-way flat trailer connector. That signal is then transmitted through the connector to activate the appropriate function on your trailer lights.


Universal, Worry-Free Design

No Splicing, Cutting, or Connecting to Factory Wiring

Because the ZCI sensors can read the signals sent through your vehicle's wires just by clamping onto them, no cutting or splicing is necessary. The system completely bypasses all of your vehicle's wiring. As a result, your trailer's lights will be powered without overloading your vehicle's electrical system. And there is no chance of damaging feedback either.


When using this ZCI harness, you don't have to worry about voiding your warranty, nor do you need to be concerned about any potentially damaging errors on your part if you're not an experienced do-it-yourselfer. And if you have a vehicle that doesn't allow certain modifications - like a leased car or truck - you can install this harness and remove it later with no obvious alteration to the vehicle.


Maximum Compatibility

This wiring harness is universal. You can use it on any vehicle that operates on a 12V, negative ground system. Because installation is so simple, you can easily remove the unit and transfer it to another car or truck at any time.


In addition, the ZCI sensors are able to read the signals sent by multiplex wiring systems and systems with pulse width modulation (PWM) and low-side-switched wiring, making the harness compatible with nearly all automotive wiring systems. This unit also works with both standard incandescent tail light bulbs and LED bulbs.


Built-In Tail Light Converter

Most trailers run on a 2-wire system - wherein the brake and turn signals are carried on a single wire. Many vehicles, however, are built with separate brake and turn signals. This type of system is referred to as a 3-wire system. If your vehicle operates on a 3-wire system, it will need to be converted so that it will be compatible with the wiring system of your trailer. This is done by adding a tail light converter to your wiring setup to combine the brake and turn signal functions of your automobile so that they run on a single wire to properly activate your trailer's tail lights.


This ZCI unit has a tail light converter built in to ensure proper functioning with any vehicle that operates on a 3-wire system. If your car has a 2-wire system and therefore does not need a converter, don't worry. The method of installing the sensors will take into account the wiring configuration of your vehicle so that only the necessary sensors are used, making sure the appropriate signals are sent back to the 4-way.


Installation

This universal harness connects to your vehicle's tail light wiring harness. To connect, just follow the included instructions. There are 4 ZCI sensors included. Each sensor has a colored label on it. Depending on your application, you will need to connect all or some of these sensors to the factory wires indicated in the instructions.


To get the power necessary to operate, the harness must be connected to a 12V power source. The included installation kit provides the hot lead required to connect this module to your car battery. When all connections have been made, connect the hot lead to the black wire on the ZCI power module and run the other end of the lead up to your car battery. Connect the hot lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery. Then insert the included 15-amp fuse into the fuse holder.


Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location either within your cargo area or beneath your vehicle, near the trailer hitch. If you choose to mount the connector near your hitch, a mounting bracket (sold separately) is recommended to keep the connector secure.


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


Surface Mount Technology

Each ZCI wiring harness is built using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability, and durability.


Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? SMT components also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.



119251 Tekonsha ZCI Zero Contact Interface Universal ModuLite and Installation Wiring Kit

48705 LED Circuit Tester - 12 Volts

Installation Details 119250KIT Installation instructions


California residents: click here



Customer Reviews

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit - 119250KIT

Average Customer Rating:  4.7 out of 5 stars   (351 Customer Reviews)

Install a 4-way trailer connector on your vehicle without cutting or splicing into your wiring. Zero-contact interface sensors identify the current flowing through each wire by simply clamping onto it. Circuit-protected module is made using SMT.

- 119250KIT
by:

The product works well for the most part. The only issue is that it doesn't trigger the brake lights on my Kendon motorcycle trailer.


Comments
Because you have a motorcycle trailer and not a standard trailer, you will need a converter to separate the circuits of the Tekonsha harness from a 2-way circuit to a 3-way circuit. To do that, use the Curt 2-To-3-Wire Tail Light Converter, part # C56196
Curt 2 to 3 Wire Tail Light Converter
$46.95
.
-- Etrailer Expert Katrina B - 05/03/2022


- 119250KIT
by:

I love my hitch, but the installation of this harness for my Audi Q5 was a huge disappointment. I think it's absurd that the wiring has to hang out of the hatch. I ended up buying something different from the installer that could store UNDER THE BUMPER where it should be. Since the box was misplaced, I was unable to return it. I'll maybe try to sell --- or just throw it away. It was an expensive mistake.



- 119250KIT
by:

I used it on a 2017 Chevy bolt (think Chevy discurages people from installing a trailer hitch) since it did not come with any trailer hook up instructions. I think it gave my instaler a work out since he never did one before, but despite the cost I think it was the right way to go instead off cutting into wires etc. I dont use a trailer that much, but it has worked absolutely fine. Only problem has been that I think installer disturbed a wire hook up to a parking light (that is only needed-if lift gate is open) so he has not gotten around fixing that since he has to get into the trunk inards to do it.



- 119250KIT
by:

Super easy to install on my 2013 MINI Cooper Coupe, no cutting or wire splicing needed. The MINI tailights incorporate both LEDs and regular incandescent bulbs and have a somewhat convoluted wiring harness, but I had no issues and everything worked as it should out of the box. Recommended.



- 119250KIT
by:

Installed on a 2018 Audi Q5. Installation was not easy, partially due to working with the panels on the Audi, partially due to the module being hard to configure properly. After 20+ hours working on it, I got it to a point where it correctly recognizes 'most' signals. For whatever reason, the left turn signal does not work, regardless of how many times I adjust the connections and reset the module. It was a cheap solution that gets me 80% of the way there. I'll also note that there is little/no online reference material available, beyond the installation videos that etrailer posted; this makes troubleshooting nearly impossible.


Comments
I recommend viewing the video install that we have on a 2018 Audi Q5. Be sure to follow the steps for a 2 wire system in the manual. When one of the functions is not working you would need to start vehicle and turn all functions off: Tail and head lights, brake and turn. Initiate ZCI learn mode by placing 15 amp fuse into fuse holder. Then you would active each function for 5 seconds. The hatch does need to be closed when testing the harness.
-- Etrailer Expert Jenny N - 01/04/2022


- 119250KIT
by:

Great wiring harness, does NOT require and cutting what so ever. Sal FROM customer service is very helpful. I would recommend for a friend to help to make the install go faster. Over all great, dealer said I would need a special computer program for the Harness to work properly, that is incorrect. Just follow the instructions that are included and you will not regret your investment. Car 2018 Audi Q5



- 119250KIT
by:

The trailer hitch and wiring assembly have worked flawlessly. After calling several local installation outfits and receiving estimates of $2,000+ I decided to install myself. I have a little mechanical experience but this was the first hitch and wiring harness for me. This is my wife's X5 so I was a little nervous about popping rivets and pulling the rear bumper cover off, but eTrailer has excellent step by step video instructions by model year. The order included replacement rivets and detailed instructions. They could not have made this any easier. I really took my time and completed the job in about 5 hours. The final install looks professional and clean. The no-splice wiring harness is amazing - worth every penny. Tools: I was able to easily pop off the existing plastics rivets, and installed the new rivets (included from eTrailer) with pliers pretty easily - you may want to borrow a plastic rivet gun from your local hardware or auto parts store. On the X5 your have to cut a small notch out of the underside of the bumper cover. I happen to have a Dremmel which worked well. You may be able to use a razor blade. The plastic is not that thick. Pictures are attached. Thanks etrailer!



- 119250KIT
by:

2012 VW GTI (autobahn edition) Installation (DSG) I had some small issues and hiccups along the way, so in order help out since I couldn't seem to find vehicle specific help, here is what I did. I did buy the CURT 4-way flat connector tester (Item #126) first to make my life easier when testing. It helps. Buy it. First - start by removing the cargo floor carpet and pulling down the drivers side wall carpet. I did find it necessary to take the moulding trim off the top portion of where the hatch cover locks in, along with the rear seat belt guide trim so I could run the wires to the battery cleanly. There is a few star bolts holding the trim alongside the rear seats when folded down, so just do a search if can’t find it (one cover has to be popped off) Second - Wiring. This was a little bit of a guess, as I have 3 wires, and my meter didn’t seem to be helpful since they were so small and close together. Here’s what works (drivers side): - “Stop” module clips over the black/red wire - Middle brown wire isn’t used - “Left” turn signal module clips over the green/black wire - Passenger side right turn signal clips over the green/black wire - I screwed the ground right into a side structure panel Running the battery cable was the bigger time suck. - Stated above I had the drivers side rear panel trim and carpet removed, and I continued removing the front/rear drivers floor sill trim. I ran the black wire along the current loom and tucked it under the floor carpet. - I then ran it behind the hood latch and towards the top of the metal foot rest, keeping it behind the carpet - This is where you get to the firewall. There is a piece of foam. Remove it. Now you’ll see a rubber grommet where the clutch pedal would go through if you have a standard. I took that out, drilled a small hole to run the wire through that I attached the wire to a metal hanger to fish up and to the right of the battery box. Fish it up, grab it, and pull it through. - Slide the grommet back into place (your wire would have been already through it) and snap it on. - Make your connection to the battery and follow initiation instructions.



- 119250KIT
by:

Works, could not get lights to work 100% correct but close enough to use the trailer. Brake lights are on when running lights, and 4way hazard lights don’t work. But turn signals work and brakes dim the trailer lights so good enough. Audi A3 etron



- 119250KIT
by:

This kit works perfectly! A reasonably straightforward installation, though not for a DYI'er who is uncomfortable ripping into the trim and lighting wiring harness of their vehicle. A reasonably accurate wiring diagram is very helpful, but not necessary because trial and error works well with Hall sensors used in this kit (i.e. no cutting and splicing wire is required). Once installed, the trailer lighting load is easily handled by the power module without feedback to the vehicle lighting control circuit, although my setup does not interface with a trailer brake controller so I cannot judge full performance. One hint - do not loose the heavy stock reference card that reminds one of the programming routine, While performing other electrical work on my car needing battery disconnection, I can never remember the programming sequence for the trailer lighting controller. Not to worry, though, the product support site has the info.



- 119250KIT
by:

The Tekonsha wiring harness was a bit difficult to install, as the clip-on connections are a somewhat bulky to fit in my Tesla Model 3's tight spaces. The good news is: they work as promised like a charm with our tiny camp trailer's lights. In truth, I have only had to use them once, but cannot imagine that any unforeseen problems would occur with them in the future.



- 119250KIT
by:

Installed on 2018 Jeep Grand Cherokee Limited with no tow package. Install was kind of a P.I.T.A. But worth doing on your own to avoid the stealership. Not too much electrical knowhow required, as the black wire on Jeep tail lights are all ground. Running the power cable was the most difficult part, and required removing the interior rear quarter panel, which I managed to break a plastic clip. Would not recommend this on a Jeep, as there is no simple way to install this on the interior of the vehicle since the tail lights are wired 100% outside of the car. I’d say skip if you are looking into this for a Jeep, and wait for an OEM trailer harness to come out from mopar.



- 119250KIT
by:

I installed the kit on a 2016 Audi A6. I could not find any videos for this car but did watch the video on the Audi A4 which was helpful. Audis are not easy to get information on and are sometimes difficult to work on. The A4 info was very helpful in accessing the wiring but from there it was trial and error in which wire to use for each function. The sensor is very easy to install although on the A6 it is very cramped to work on. IT TOOK ME CONSIDERABLE LONGER TO DO THE INSTALLITION THAN ESTIMATED. This was not due to the kit but to wire identification and some problems with the wiring on my trailer I hAVE NO PROBLEM WITH THE QUALITY AND OPERATION OF THE KIT. For accomplishing the job I rate it 5 stars. I first saw this kit a couple months ago and though it quite expensive (at that time $xxx +) At the time I ordered it the price was just over $xxx. The Audi is a very high tech car so I decided to pay this to avoid the possible trouble a direct wiring job could incur. The product was shipped promptly but before I received it the price had dropped to $xxx. This does not make me feel good about the value of my purchase. I like your web site and the easy of using it. Sorry I have no photos.


Comments
I am not seeing the different price of the product. If you have a screenshot of this, I would be happy to review. Our prices vary depending on manufacturer. We do have a Lowest Price Pledge stating if you find the exact same product on another website for less, etrailer.com will refund the difference plus 10 percent. Please call customer service for help 800-298-1624 with this.
-- Etrailer Expert Sierra K - 10/05/2021


- 119250KIT
by:

Wiring to the battery on my model 3 would have been a pain so I just put a small battery in the back with the module. It is really nice being able to haul a small trailer.



- 119250KIT
by:

Installed on my 2017 Corvette Z06. Easy install and works great. Suggested by one of there tech’s to not void the warranty. No wires get cut or pierced. Thanks for a great product.


Comments
The harness, as I said , installed easily and worked perfectly. It’s still working perfectly. As you can see this was not your normal install. The tech did not judge but instead was anxious to help.
David1 H - 04/24/2021


- 119250KIT
by:

I had the harness installed. It is easy enough to do yourself providing you have the tools and mechanical experience. The harness works great and can be removed should I want to use it on another vehicle.



- 119250KIT
by:

Combine this kit with a couple of YouTube videos (Thank you U-haul), the installation isn't difficult. Do purchase a circuit tester with an attachment that wraps around a wire and pierces the insulation. The cheap circuit tester that comes with the kit is worthless.


Comments
This product has worked flawlessly since installation.
David W - 10/27/2021


- 119250KIT
by:

Excellent product. Trailer wiring works flawlessly with no “wire touch” to the Porsche OEM wiring.



- 119250KIT
by:

The wiring system works remarkably well. I was skeptical of a system that only parallels the original wiring harness instead of a hard connection but it works great and saved me from having to cut in to my cars wiring. I highly recommend this system. The installation video is a bit lacking in a few details but most handy people should be able to figure out the routing through the car body without great difficulty.



- 119250KIT
by:

We own an Audi Q5 and we had the unit professionally install at our local garage. I am disappointed in the way the unit performed. We used it to pull a small uhaul trailer, and the lights worked only spardically. The tail lights worked most of the time, but the signal lights seemed to only work at random. For this emergency trip it was adequate, but I would not reccomend this product.


Comments
Thank you for leaving a review! If you are able to, checking the wiring connections and the ground wire may all be all you need to fix the issue. You will want to make sure the ground wire has a direct and clean connection and that other connections are secure. If you reference the install video on this page it may be useful as a visual aid as to where on your vehicle to check for the connections.
-- Etrailer Expert Brooke M - 08/25/2021


- 119250KIT
by:

I am very satisfied with the ZCI wiring harness. However I do not appreciate the amount of emails you are sending me. Remove my email from your promotional advertising. Thank you.



- 119250KIT
by:

This is an excellent kit - bought it for my '17 Chevy Bolt, and installation went without any problems. Just make sure you do things accurately and to best quality. The kit's only as good as your installation.



- 119250KIT
by:

I installed this on a 2019 VW Alltrack. Well designed, works great! Instead of running a power wire to the module per the instructions, I just power it from the 12v connection in the rear of the car as needed.



- 119250KIT
by:

Works better than expected. No "learning required by device. Works fine when powered up, even though i normally remove power between trailer uses to eliminate load.


Comments
Trailer hitch and electronics have worked perfectly since installation. Tesla has so much torque, we hardly know trailer is there.
Better t - 10/07/2021


- 119250KIT
by:

My son installed the hitch and the wiring. Hitch was installed and wiring took about 3 hrs. He’s a auto technician and he was amazed seeing a wiring without slicing. Great product.


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Ask the Experts about this Tekonsha Trailer Wiring



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    We know from Tekonsha training on their universal-fit ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT that this item is very sensitive to the initial setup process, which must be followed exactly for correct operation. My technical contact at Tekonsha advised that the magnetic sensors in this kit are directionally sensitive. If one of these were clamped on in reversed orientation it would not function correctly. He suggested that you pull the fuse to let the circuitry power down...
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  • Does ZCI Trailer Wiring Harness Make Install of 4-Way Easier than Standard Universal Kit
    With the part # 119250KIT you have to pull out the wiring of the vehicle to access the wires that lead to the taillights, similar to what you saw in the video you mentioned. Where this kit makes thing is easier is that instead of having to use a quick-connect to splice in to the wire once you have found the one you need by testing, you instead attach one of the black sensors of the kit around the wire. Easiest way to see how this installs is to check out the install video I attached that...
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  • Installing ZCI Circuit Protected Wiring Harness on 2015 Audi Q5
    In order to install the ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT on your 2014 Audi Q5, you would have to determine the functions of the wiring by using the kit's included circuit tester, as per the directions. Wiring can be different from year to year and there is no universal color code which is followed, so it's important to test your functions so you can wire it properly the first time.
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    The three options for a 4-pole wiring harness kit for your 2014 BMW X5, all shown on the linked page, are powered converter types that use a direct connection to the battery to provide the actual power to operate the trailer lights. The signals from the car serve only to trigger the converter but they do not power the lights. This feature provides isolation and protection for the car's internal wiring/circuitry in the event of a short or other fault on the trailer. A new harness is much...
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  • Troubleshooting Trailer Brake Lights Staying On After Installing Tekonsha ZCI Wiring Harness
    The fact that the brake lights on your trailer are staying on all the time indicates a possible short somewhere in the vehicle or trailer wiring. Although it's pretty unlikely with the connector being new, I recommend first checking the connector at the rear of the vehicle for any dirt or debris that might be causing a short. If the connector looks fine, I recommend moving to the vehicle wiring harness. The Tekonsha ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT is particularly...
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    There is not a custom fit confirmed for your 2018 Toyota Highlander XLE available yet from any of our manufacturers. You may want to consider using the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT which is a fit for many vehicles because it senses the current in your wiring without actually splicing into them. It uses zero contact interface sensors and draws power for the converter directly from the battery of your vehicle....
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  • Recommended Trailer Wiring Harness for 2009 Porsche Cayenne
    For your 2009 Porsche Cayenne without a factory trailer connector, I recommend the Tekonsha ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT. This is a universal harness that will allow you to install a 4-Way trailer connector on your Porsche without having to cut or splice into its wiring. The zero-contact interface sensors actually identify the current flowing through each wire by simply clamping onto it. Once installed, this will give you a 4-Way to connect to your trailer and...
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  • Which Wiring Configuration to Use for ZCI 4-Pole Wiring Harness 119250KIT in 2015 BMW 328ix
    The ZCI Zero-Contact Interface 4-Pole Wiring Harness Kit # 119250KIT is a universal-fit wiring harness that can work on almost any vehicle without need to cut into the vehicle wiring. This enables it to be moved from one vehicle to another as needed and makes it the ideal choice for a leased vehicle. The written instructions detail the specific installation checks and steps required to identify the vehicle wires to be used for clamp-on installation of this kit's electro-magnetic sensors....
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    For a trailer wiring solution for you 2012 Mercedes Benz that will bypass all of the issues you described you would want the ZCI kit part # 119250KIT. Since this harness does not require any hardwiring and uses your turn signal circuits as only signal wire it would not cause any of the issues you described. Basically you would attach the sensors to the taillight wiring of your vehicle and then run the power wire up to the battery which allows all of the amperage of your trailer wiring to...
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  • Will ZCI Circuit Protected Vehicle Wiring Harness Work On 2015 Mercedes-Benz GLA 250
    The ZCI Circuit Protected Vehicle Wiring Harness, part # 119250KIT is a fit for your 2015 GLA250. This kit installation is very simple by clamping the sensors on to the existing vehicle wiring without cutting or splicing. The harness includes the module that protects the vehicle wiring and has no power draw from the vehicle electrical system.
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  • Will Tekonsha ZCI Trailer Wiring Harness Fit 2003 Dodge Ram 2500
    Yes, the ZCI trailer wiring harness part # 119250KIT that you referenced can basically fit any vehicle on the road and that would include your 2003 Dodge Ram 2500.
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  • 4-Pole Wiring Harness Installation in 2014 Mercedes-Benz GLK-350
    We do not have access to vehicle wiring diagrams but we do have a confirmed harness fit for your 2014 Mercedes-Benz GLK-350. The 4-pole wiring kit for your car is the ZCI # 119250KIT which installs without having to cut or splice any wiring in the vehicle. This advanced wiring kit includes a circuit tester which will allow you to determine which vehicle wires carry which particular function. This enables simple installation using the zero-contact clamp-on connectors in this kit. No permanent...
    view full answer...
  • Can the ZCI Trailer Wiring Kit Install in Multi-Plexed Taillight Wiring
    The ZCI trailer wiring harness # 119250KIT is pretty universal and can fit several different types of taillight configurations. Sounds like you watched an install video that uses a different style than what you have. If you check out the picture I attached you can see the different styles of lights this kit fits and how to wire it up accordingly. Your setup is going to be either the BT or the BTT setup.
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  • Trailer Wiring Recommendation for 2015 Volkswagen GTI that Requires no Hardwiring
    Yes, the ZCI Trailer wiring harness part # 119250KIT that you referenced can basically fit any vehicle as it is a universal design so it would work well on your 2015 Volkswagen GTI.
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  • Trailer Wiring Recommendation for a 2015 Volkswagen Golf Sportwagen
    The trailer wiring harness you would want for your 2015 VW Golf Sportwagen is the ZCI Wiring Kit part # 119250KIT. This harness is nice because it does not require any cutting or splicing into the factory wiring of your vehicle. The only actual wiring you have to do is run a wire up to the vehicle battery to power the unit.
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  • Trailer Wiring Harness Recommendation for a 2010 BMW X5
    For trailer wiring on a vehicle that requires a universal type harness the ZCI part # 119250KIT would be the best kit available since there would be no hardwiring required. The sensors are pretty big, but you should have no problem getting them around the wires of your 2010 BMW X5. I attached an install video that shows a hardware kit being used to install on a similar X5 as yours that shows you how to find the wires and which to use. In the video around the 1:07 mark you can see the...
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  • How Does ZCI Trailer Wiring Kit #119250KIT Install on a 2015 Volkswagen Golf Sportwagen
    I checked with my contact at Tekonsha and he said to use the BTT code to install the ZCI part # 119250KIT that you have. This means to to run the yellow to the vehicle brake/tail/left turn, green to the brake/tail/right turn and then the brown and red wires would not be used. It sounds like you have tried using the B configuration and that is why you are having problems. I attached a diagram that shows the different ways you can use this box to wire up to a vehicle. To answer your last...
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