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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

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Wiring 119250KIT - Plug and Lead - Tekonsha
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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 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 800-298-8924 for expert service.
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Tekonsha Wiring

  • 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

Item # 119250KIT

Installation Details 119250KIT Installation instructions




Customer Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (217 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:

Very well thought out product, no cutting or drilling required to install. The light kit is superb as well, loved the way it attaches to the wires and operates independently of the electrical system. Well done! 501262



- 119250KIT
by:

I’m happier than I thought I would be with the results. Even the nifty little 12 V tester work fine. The instructions were more than adequate, there was plenty of wire and everything worked on the first try. 566365



- 119250KIT
by:

I've towed racing sailboats for many years, mostly with European automobiles. Needed the hitch later this month so I could pick up a "new" one I just bought . This install was the second easiest out of the 6th I've done myself. High quality kit fits great. Even though Curt says the C11701 doesn't work on my 2008 Mercedes E350 4Matic Sedan Sport, I had absolutely no problems. The Tekonsha light converter was a snap too. Certainly lots better than the old days when I had to jury-rig the trailer lighting to match the car. Finally, your service was super. Couldn't be happier. Thanks! 395365


Comments
Very easy installation and zero problems since. Tows the new racing sailboat great. Highly recommended.
George S - 06/12/2018

39645

- 119250KIT
by:

Installed in an afternoon, could have been under an hour with model specific instructions. The car ('16 BMW 328iX wagon) has a bulkhead connector through the passenger side rear quarter where all the tail light & other rear end wiring exits. That bundle of wires splits off a larger loom ~6" before the bulkhead, which looks to be the easiest spot to install the current sensors. It's tight access but also less than a foot away from the battery. It's all accessible by just pulling one interior panel, no need to touch the drivers side at all, installation at each taillight location doesn't make sense for this car. Oh yeah - both L & R turn signal wires are black/white, so you have to double check before buttoning things up. The product works perfectly as advertised. My only request would be for a little more streamlined shape to the sensors for tucking into a tight space like mine. 296467



- 119250KIT
by:

everything as advertised as it should be. Not advertised was the excellent service and every attempt to get my product to me on a tight time schedule. Above and beyond, but just what I want to do for my clients. Really great service! 328643


Comments
Still working well!
johnR - 12/27/2017

32277

- 119250KIT
by:

Installed it on my 2016 VW TSI Wagon. Installation was fairly easy and I've used it at least a dozen of times now with my trailer and it works flawlessly. I like that this kit did not require taping into existing wiring. Sensor wrap around wires and pick up the signal and separately powered box deals with activating trailer lights. Brilliant! 391803



- 119250KIT
by:

The description of the product is accurate. The info on how to install is straight forward and well illustrated. I don't remember if this purchase had video support but I know other purchases from etrailer did. I've been very satisfied. The fact that this product doesn't violate the wiring should keep my vehicle warranty intact. 366909



- 119250KIT
by:

Product was simple and straight forward to install on my BMW X6, however, it does have some issues. The lights are inconsistent at best. The lights on my travel trailer sometimes work perfectly and some times not. The issues are that sometimes the lights just go out while traveling down the road and then come back on minutes later or not at all. When the lights won't come back on I have to pull over, turn the car off and then restart. This works to bring the lights back on. Other times the trailer lights just stay on. Turn the car off and the lights just want to stay on. Unplugging them turns them off. So.......they work......sort of. I hope this helps. 463447



- 119250KIT
by:

Well built wiring kit and good instructions. The Land Rover's wiring is tough to get at, but after taking the spare tire out and the fuse block door off I could get at them. One thing the instructions didn't indicate is that the rear lights appear that they have to be plugged before the module will learn them. Tried the first couple times with the connector removed from the light and the module would not work. Removed the fuse, but the tail lights back in and went through the learning process and it worked the first time. 430624


Comments
Working great and never had an issue with it.
Brian S - 09/10/2018

43416

- 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. 697887



- 119250KIT
by:

Unsure about this product. I am always leery of online orders for electronics and here’s why. The product arrived timely, however the box had clearly been opened and the product had been installed (or attempted to be installed previously). The wires were not neatly packed and there was black grease and evidence of the grounding screw having been installed. The harness was zip-tied back together in a rather messy fashion. I am hoping I don’t end up spending my weekend installing a product that is defective. A bit disappointing after all of the other positive reviews. Crossing my fingers 498419



- 119250KIT
by:

Bought the hitch and wiring harness from etrailer.com last year, and following their excellent video installation instructions, was able to complete the installation in only a couple of hours. (Would take about half that time to do it again, always worried about breaking something!) Everything has worked flawlessly, and we have been completely satisfied with the purchase and support. Will definitely return the next time we're in the market for hitch related products. 515249



- 119250KIT
by:

I selected this kit to install in my 2008 BMW X5 because I didn't have to splice into my vehicle's wiring and risk damaging something and it was extremely easy to install. It turned out to be even easier than I originally anticipated. Total install time was about 45 minutes start to finish. And even better, if I ever need to remove the kit from the vehicle, there won't be any trace that anything was ever installed. Difficulty level to install on a scale of 1 to 10 with 10 the most difficult is about a 2. Works perfectly as described. Highly recommend over any other trailer wiring kit available. 541233


Comments
I’ve been using this wiring harness now about a year to run several small trailers with no problems. I always check all trailer lighting afyer hooking up and no issues.
DougR - 07/13/2019

57763

- 119250KIT
by:

Great product! I was able to install on my BMW X5 in less than an hour, very easy installation. I placed the order with Etrailer and while I awaited its arrival I watch the video associated with the installation. When the item arrived I opened the box verified I had all the required parts and made the installation without reading the instructions. Watching the video is invaluable and well worth the time. Upon completion I hooked to my trailer and it worked flawlessly. If you follow the set up you will have no problems. I liked the fact I had to do know splicing and removal should be simple. I ran my wiring to the hitch so I didn't have it hanging out the back hatch. When I looked online it suggested the removal of the bumper cover. I was able to run mine down behind the bumper and to the hitch with out removing anything. I simple fed it behind the bumper with the tailgate down. It tucked neatly behind the bumper and I zip tied it in place. The unit seems to be well built but is a little pricey in comparison to other units. The benefit of having a universal harness that requires no splicing with easy installation was the difference maker for me. 414075



- 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. 399189



- 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! 675332



- 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. 671336



- 119250KIT
by:

When trying to get a trailer hitch and electrical wiring for my 2015 Golf Sportwagen, I was a bit frustrated by the response from VW -- on the one hand they stated in the manual that the vehicle was not designed to tow, but on the other hand they gave specification for a trailer, but the dealer was no help installing either a hitch or harness. So, I got the hitch from Torklift EcoHitch (a GREAT product), and after much searching, the 119250KIT from etrailer for the electrical. I had a service shop install the electrical (VW dealer would not touch it!), and it seemed to work fine for a year. I was a bit troubled by the mounting of the connector outside the car, using the supplied little harness. But, proceeded anyway. We had a pretty rough winter up here in northern UT, and when I went to connect my trailer for spring gardening work, the electrical connector was badly damage, with both corrosion of the contacts and bent contacts I had to straighten to get the thing to work. Message #1: Do NOT mount the connector outside the vehicle! I had the repair shop replace the connector, and when they did, they could not get the lights to work properly. Most important issue: even with the car totally off, when the trailer was plugged in, the left trailer tail light was on, and it ran the battery down! We determined that the problem was likely a fault in the power module. Note that the text on the module clearly states 'Circuit protected'. I am not sure what we did, but it is pretty clear we blew the thing. And, I could not get a replacement without buying the whole kit again. There was no option, either from etrailer, or Tekonsha (manufacturer of the module) to just get a replacement module. I feel a bit stuck, but lessons learned: I am NOT mounting the connector outside again, where it is exposed to road salt in winter, and can corrode, and I will be careful not to cause a short when making the connection. I will reserve final judgement on the 119250KIT for a year or so, if it does not fail again, I will be happy! 390291



- 119250KIT
by:

Overall I am very happy with this product. It worked as advertised and wasn’t too hard to figure out. The one thing that would have given this item a 5 star rating would have been better directions. It would have been nice to have everything labeled step by step. For example, step one do this, step two do this. Etc. 661280



- 119250KIT
by:

The TEKONSHA no contact wiring harness seems to be a very good product. I had it installed by the Hyundai dealer. This was a new product for them so I explained that it is probably the way of the future since it doesn't effect the factory wiring at all. They were also interested in trying it so only charged me for one hour of labor since they were also learning about the product. It has worked as advertised so far. I use it for auxiliary lights on my bike rack. The lights are LED so the draw is minimal. 680002



- 119250KIT
by:

This is one of the most easiest kit to install, The instruction diagram is very clear and print really well. I honestly did not follow the instruction diagram because it is very simple and straight forward. Work so great, no wire tapping, cutting, pinching, non none of that. 482391



- 119250KIT
by:

I purchased and installed the 119250KIT in my 2016 Lexus RX 350- WITHOUT the factory trailer package. Although Lexus will always tell the consumer it Must have the factory wiring harness, it does not. I did not take pics but this is not a difficult task to accomplish. Be patient and follow these steps, it is about an hour long task. To install the wiring harness, first remove the plastic trim at the bottom of the lift gate, it is held down with plastic fasteners and simply pops off. I strongly suggest going to Harbor Freight and buy their $4 kit of plastic pry bars, rather than risk scratching up the paint on your vehicle. Next remove the deck storage buckets and carpeted pieces to left/right of the spare tire, this will allow you open access to the wiring. I installed the Tekonsha module on the driver's side in very back to left of the spare and on the back of the wheel well. Don't put on the double sided tape yet, this will be done in a later step. Next step is to remove the small plastic (3" x 2") vent on the rear left vertical carpeted wall, it just pops out from the bottom (first), then slide down, and off. Now, carefully remove the left tail light by using a plastic pry (from Harbor Freight) the whole assembly will slide out of the plastic snaps from front to rear. Use a towel when you let it 'hang' against your paint. There is a thin plastic cover piece which is in the lift gate track and covers 2 tail light bolts- which pops out easily. Once the assembly is removed, you will see the turn signals bulb insert has a colored (power) wire and a ground wire (twist this to unlock and allow you to test which wire is hot). The other wires on the assembly go to the running and brake lights- test them in a similar manner to determine which color is running lights and which is brake light. Look through the opening where you removed the 'vent' to see the tail light wires and pull/trace them by color into the back of the vehicle. You will have to slide the tail light wires (carefully 1 at a time) through the black water tight rubber plug to give you some length to clip on the Tekonsha connectors. I connected the Left, Running, and brake light -Teconsha clips all on the left side of the vehicle. Don't wrap the foam around them until they first test ok. All of the arrows on each Tekonsha clip should point toward the (rear) tail lights. A CRITICAL task is to locate a GOOD ground from the Tekonsha module (white wire) in the back of the vehicle. In my Lexus, under the Lift Gate area, I located a steel screw which already had 2 white wires with black stripes and extended the (short) Tekonsha to allow me to use this. Without a GOOD ground, you WILL have problems, waste a lot of time (1 hour plus), and aggravation to troubleshoot problems later. Trust me, I know!! Now that you have completed the wiring on the driver's side, do the same with the passenger side. Here you only need to run the single clip for the turn signal (1 wire). The Tekonsha clip is long enough to run across the lift gate area next to the factory harness. Locate the appropriate right turn signal wire by sliding off the right tail light similar process to the left light you just did. Clip on the Tekonsha clip. Next I tested all of the lights with my trailer. Once all were working, I put the foam wraps on each clip, secured the Tekonsha module using the double sided tape (on rear of wheel well), secured loose wires with zip ties, bundled together- all excess wiring, and secured in the side well. The last task is to run the black power wire from the Tekonsha module up to your battery in the engine compartment. If you are not too large, you can fit under the vehicle- otherwise raise it off the ground (safely) so you can get under the left side to route the wire. First, disconnect the negative battery cable from the battery post! Next, I loosened the 6 bolts which held the black plastic covers (under carriage of RX 350) and ran the wiring from just in front of the LR wheel all the way forward to my battery. Zip tie along the way as necessary, as not to interfere with moving parts. Then from under the vehicle, I ran the remaining wire around the LR wheel and zip tied again as not to allow any pinch points or abrasion (from suspension) of the wire. In the LR quarter panel of inside of vehicle you will see a rectangular brown plastic which will pop out and allow you access to pass wires from the undercarriage to the inside. This is where I ran the power (to battery) and trailer light 4 wire pigtail (to hitch area). Since it is plastic, I cut out a little square in the bottom of it and reinserted this in original place. Next, go to the front of the vehicle and install the fuse holder to the positive side of battery. Reconnect the battery ground and insert the 15 amp fuse provided. Give your system another check and verify the fuse did not blow. Put back the removed panels and pieces- you are all set to tow!! 278814



- 119250KIT
by:

This harness works great, although it took a lot of repeated tries "learn" the module to my 2018 Audi Q5. My local specialty repair shop was willing to give this ZCI solution a try so they could offer it to future customers. They had done a cut-and-splice harness for a previous customer on the same model but were turning down further requests because they found the re-programming and recalibration of the electronics to be prohibitively complicated and time-consuming; even the AUDI dealers I called were balky and a little vague about the time, effort, cost, and warranty implications. My local guys found the installation easy but could only get it partially working at first. After multiple views of the video and exhaustive attempts to isolate the issue, it finally worked, for no apparent reason, on the 5th or 6th repetition of the "learn" routine. Despite those issues, I recommend this as being worth trying as perhaps the only reasonably-priced path to trailer wiring for this model. 556229



- 119250KIT
by:

My mechanic and I have no concern that the product will perform well but there were some significant issues with installation that could be fixed with some careful attention. All wires on the unit are the same color and when the product arrived, all of the wire labels had fallen off. Determining each wires function was a painful and tedious process that took considerable time. That process is beyond the do-it-yourselfer. Also, the wire connection grommets seem to fall away from the wire when engaged. They had to be taped to the wire to prevent disengagement. We were able to work through these issues and the harness works perfectly. Either placing better wire labels or color coding the wires could prevent this problem in the future. As for the grommets, numerous potential fixes could be considered. 525133



- 119250KIT
by:

Took a while to figure out the wiring and testing, but I'm happy now. If you have a 2014 SQ5 and use the ZCI wiring harness, you'll need to connect the following wires (and make sure to have the tailgate closed when testing): Driver Side Black w/ Blue Wire to Lights Grey w/ White Wire to Left Turn Signal Passenger Side Grey w/ White Wire to Right Turn Signal Hopefully this helps! 451964


Comments
Thanks George, everything is working as expected.
Justin - 11/14/2018

45720
40
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  • Is There a Wiring Harness That Fits 2012 BMW X5?
    There is a wiring harness available for your 2012 BMW X5 that will allow you to tow your popup camper. The ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT will install in your SUV via clamps and a module that connects to your car battery to get power. This will not require you to go to your dealer for any type of programming and is a straightforward install. I recommend using mounting bracket # 18144 to keep the 4-way in place as you tow. I also recommend checking out Ball Mount...
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  • Trailer Wiring Harness that Fits 2020 Lincoln Corsair
    For your 2020 Lincoln Corsair we have the Tekonsha trailer wiring harness # 119250KIT that you referenced as a confirmed fit which is a really great option as it's easy to install and very reliable but the other option you mentioned does not fit and is not the way to go.
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  • Trailer Hitch Receiver for 2013 Mercedes-Benz E350 Sedan
    There is a trailer hitch receiver that I confirmed with the manufacturer fits your 2013 Mercedes-Benz E350 sedan, the Curt Trailer Hitch Receiver # C11001. If you plan on doing some towing, the only 4-way that fits your Mercedes is the ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT. You will also need Curt Class II Drawbar # C45521, Pin and Clip # F-4, and either 1-7/8" Hitch Ball # A-80 or 2" Hitch Ball # A-82.
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  • Which Way do the Sensors for the ZCI Wiring Kit go on my 2014 Audi Q5
    Great news this is easy to determine! When installing the ZCI Circuit Protected Vehicle Wiring Harness part # 119250KIT the arrows should be pointed to the light. So in this case the arrows should be pointing upwards on the harness because that is where the light signals are traveling up to the lights. I have included the video you mentioned for easy reference.
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  • Trailer Wiring Kit Recommendation for 2013 Mercedes GLK350
    The best trailer wiring harness for your 2013 Mercedes GLK350 is the ZCI kit part # 119250KIT which does not require any splicing to install and is a very reliable and well-made kit. This kit comes with everything you'd need to install in your vehicle.
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  • Best Trailer Wiring Kit for my 2008 BMW X3
    For your 2008 BMW X3 I recommend using the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit part # 119250KIT. This is our most recommended kit for vehicles that don't have custom fits. When installing there is no cutting or splicing of your factory wiring harness which I really like. You'll simple follow the instructions and match each connector to the appropriate wire then run the power wire to your battery. To determine which...
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  • Recommended Least Invasive Trailer Wiring Harness for 4-Way Trailer Connection
    We have two options for your wiring harness for your 2015 VW Golf SportWagen TDi. The least invasive option is the Tekonsha ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT. This harness offers zero contact interface sensors to capture the signal from your vehicle without splicing into the wiring at all. This harness is designed to work with a wide variety of vehicles. The second option is the Curt Powered Tail Light Converter...
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  • How To Add a 7-Way To a 2017 Audi Q7
    If your 2017 Audi Q7 did not come with the factory tow package which if I had to guess would be the case since you are looking for a trailer connector then there are no custom fit trailer wiring harness adapters available. That said, I do still have a splice free option in the ZCI Circuit Protected Vehicle Wiring Harness part # 119250KIT which uses clamp-on sensors. The ZCI Harness only has a 4-way output but you can adapt this to a 5-way with the part # 20036 or to a 7-way with the part...
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  • Difference Between Tekonsha 119251 and 119250 ZCI Wiring Harness for Mini Cooper
    The 119251 part that you referenced is actually the same as the Tekonsha ZCI Circuit Protected Wiring Harness # 119250KIT, which is indeed a fit for your 2010 Mini Cooper. We simply use a different part number on our end for organizational purposes, but both numbers refer to the same exact kit from Tekonsha (the 119251 is the number Tekonsha uses). This is a great kit for your Mini Cooper as it uses zero-contact interface sensors to identify the current coming through the factory wires...
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  • How to Install the ZCI Wiring Harness on a 2019 Volkswagen Golf Alltrack with Multiplex Wiring
    In regards to installing the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector part # 119250KIT on your 2019 Volkswagen Golf Alltrack, you may need to attach the wire connector with the brown sticker to the rear license plate illumination circuit and the wire connector with the red sticker to the center high stop light if the stop position and tail lights pins inside the trailer connector on the above harness do not work after installing the wire connector with...
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  • Instructions for Tekonsha ZCI Wiring Kit Explained for a 2012 BMW 135i
    I can help explain the instructions better for the ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT, but I don't have the details about the wiring on your 2012 BMW 135i so you will need to do some testing with a circuit tester # PTW2992 on your end. The first thing you need to do is determine what kind of lighting system you have by using the circuit tester to see what happens to the different wires when you use the brake pedal, turn signals, and use your headlights. You can...
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  • Recommended Wiring Harness for 2015 Mercedes-Benz GL450 with Existing 7-Way Connector
    The Tekonsha ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT referenced in your question is confirmed to fit your 2015 Mercedes-Benz GL450. This will install a 4-Way connector at the rear of your vehicle without cutting or splicing into the wiring, as the zero-contact interface sensors will identify the current on each wire simply by clamping onto it. Then on the back of the 7-Way connector that is currently mounted to the hitch, check to see if there is also a 4-Way on it,...
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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...
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  • Recommended 4-Pole & 7-Way Trailer Wiring Harness for 2009 BMW 335d
    The easiest 4-pole wiring harness installation will come from the no-splicing-required ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT. This 4-pole harness installs simply by clamping around the Bimmer's taillight wires; you do not have to cut or splice anything in the vehicle. This harness does cost more than the hard-wired type like Tow Ready # 119179KIT, shown in the linked video, but the installation is non-permanent and the harness can easily be transferred to another vehicle...
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  • Available 4-Pole Trailer Wiring Harness Kits for 2014 BMW X5
    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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  • 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...
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  • Troubleshooting Lights Staying On After Installing Tekonsha ZCI Vehicle Wiring Harness on RAV4
    The Tekonsha ZCI Vehicle Wiring Harness # 119250KIT that you installed on your 2019 Toyota RAV4 can be extremely sensitive with regards to the initial setup. Because it uses zero-contact sensors to identify current flowing through each wire, all the steps need to be followed exactly as written in the install manual. If the lights are staying on after initially activating them then this could be an indication that the magnetic sensors were simply installed in the wrong direction. Try...
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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...
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  • Trailer Wiring Harness Recommendation for 2016 Audi Q5
    We have a trailer wiring harness for your 2016 Audi Q5 that does not require hardwiring to install. For that you'd want the ZCI kit part # 119250KIT. This kit uses sensors that attach to the wires instead of quick-splices so you have a very non-invasive wiring kit install. I attached an install video for this kit on a 2018 Audi Q5 which will be very similar to your 2016 Q5.
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  • 2018 Hyundai Kona Trailer Wiring Recommendation
    For trailer wiring for your 2018 Hyundai Kona the ZCI kit part # 119250KIT is what you'll want. This is compatible with the LED lights the vehicle has and also it installs without requiring you to splice into or cut any vehicle wiring.
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  • How to Install the ZCI Wiring Harness Part # 119250KIT on a 2-Wire System
    It sounds to me like you have a 2-wire system on your 2015 Mercedes-Benz GLK. For vehicles that use a 2-wire system, the turn & brake functions are combined on one wire and the tail light function is on a separate wire. The easiest way to test the rear taillight connectors for the proper turn/brake and running lights signals is to use a circuit tester like part # 40376. A voltage meter is not necessary to install the ZCI Circuit Protected Vehicle Wiring Harness part # 119250KIT. In order...
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  • Trailer Wiring Recommendation for 2019 Hyundai Tucson
    We have universal trailer wiring that will work on your 2019 Hyundai Tucson like the ZCI kit part # 119250KIT which installs without requiring any splicing into your vehicle wiring. Instead of making splices this uses sensors that clamp around the taillight wiring to interpret the signals and then give you a functional 4-way for trailer wiring. These kits basically will fit any vehicle as long as it has taillights!
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  • Troubleshooting Curt Trailer Wiring of 2017 Honda Ridgeline Not Functioning After Install
    Did you use a circuit tester like part # PTW2993 to test all of the 4-way pins of the wiring harness part # C56365? I'd start there maybe but also make sure you installed all of the fuses and relays of this kit too.
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  • ZCI Circuit Protected Vehicle Wiring Harness 119250KIT Installation in 2017 BMW X5
    The ZCI Circuit Protected Vehicle Wiring Harness kit # 119250KIT includes a circuit tester like # 40376 to help you find the correct vehicle wires for harness installation. Since wire colors are not always consistent across production runs testing is the best way to ensure proper connection. This harness is universal so it will definitely work for you but the set-up steps outlined in the linked instructions need to be followed exactly. The linked installation video shows this kit in...
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