Manufacturer | Tekonsha |
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Brand | Tekonsha |
Model | 119251 |
Item Weight | 1.86 pounds |
Product Dimensions | 48 x 5 x 3.75 inches |
Country of Origin | Mexico |
Item model number | 119251 |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | 119251 |
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90% positive over last 12 months
78% positive over last 12 months
80% positive over last 12 months
Tekonsha ZCI™ Zero Contact Interface Universal ModuLite® & Installation Kit
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
- Activates a trailer's stop/turn/tail/running lights without cutting or splicing into your vehicles wiring system - simply snap on included current sensors
- Use when: trailer has more than 1 light assembly per side and is equipped with multiple clearance or running lights; if tow vehicle may tow a variety of trailers; if tow vehicle has 'lamp out' sensors
- Re-settable short circuit/overload protection - guards itself and the tow vehicle from shorts and wiring install mishaps; rated at 4.2 amps for turn/stop circuits, 7.5 amps for taillight circuit
- Works on all vehicle types including standard, PWM and/or multiplex systems, ensuring full brightness of the trailer lights during operation; can be used on 2 or 3 wire systems
- ZCI sensor technology and direct connection to the tow vehicle battery, eliminates all electrical connection and interference with the tow vehicle electrical system
- Vehicles with 12 volt system only
- Isolates trailer light operation from tow vehicle's electrical system
- 2 amps for turn/stop & 7
- 5 amps for taillight trailer circuits. Works with low side Switched vehicles
Frequently bought together
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From the manufacturer
Product Description
ModuLite ZCI Xero Contact Interface Universal Power Modules use a direct connection to the tow vehicle's battery to power the trailer's stop, turn, tail and running lights, with absolutely zero contact with the tow vehicle's electrical system! Sensors snapped over vehicle wires sense application of electrical current and engage the trailer lights. No cutting or splicing of vehicle wiring! Perfect for leased vehicles. Use a ModuLite module when: your trailer has more than one light assembly per side, and is equipped with multiple clearance or running lights; if tow vehicle tows a variety of trailers; if tow vehicle has 'lamp out' sensors or other sensitive electronics that could be damaged by increased electrical draw. ModuLite has integrated, re-settable short circuit and overload protection - safeguards itself and the tow vehicle from shorts and wiring installation mishaps. Rated at up to 4.2 amps for turn/stop circuits and 7.5 amps for the taillight circuit. Works on all vehicle types including standard, PWM and/or multiplex systems, ensuring full brightness of the trailer lights during operation. Adapts import and domestic vehicles with separate turn and stop lights (3 wire system) to standard trailer taillight wiring (2 wire system). Compatible with either LED and/or incandescent bulbs on both tow vehicle and trailer. Works with vehicles that have a low-side switch. Includes comprehensive installation instructions. Backed by Tekonsha. From it's humble origins as a manufacturer of RV stairs and steps in 1964, Tekonsha has evolved to become a trusted name in towing safety. The core product line consists of brake controllers, electrical wiring and trailer brakes. The Tekonsha line has long been trusted by professional towers and weekend warriors for worry-free travel.
Product information
Technical Details
Additional Information
ASIN | B01CKQJCBY |
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Customer Reviews |
4.1 out of 5 stars |
Best Sellers Rank | #228,981 in Automotive (See Top 100 in Automotive) #500 in Towing Hitch Wiring |
Date First Available | August 30, 2016 |
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This Item Tekonsha ZCI™ Zero Contact Interface Universal ModuLite® & Installation Kit | Recommendations | dummy | dummy | dummy | dummy | |
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Price | $205.30$205.30 | $29.99$29.99 | -33% $9.99$9.99 List: $14.99 | $18.99$18.99 | -35% $100.59$100.59 List: $155.29 | $34.96$34.96 |
Delivery | Get it as soon as Thursday, Apr 4 | — | Get it as soon as Wednesday, Apr 3 | — | Get it as soon as Wednesday, Apr 3 | — |
Customer Ratings | ||||||
Easy to install | 3.9 | 4.5 | 4.3 | 4.7 | 4.7 | 4.0 |
Value for money | 3.3 | 4.5 | 4.4 | 4.5 | — | 4.2 |
Tech Support | 2.2 | — | — | 5.0 | 4.5 | 3.8 |
Sold By | Amazon.com | RLX9950 | BISON TOOL | CARROFIX | Amazon.com | SZen Home |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance of the auto accessory. For example, they mention it works well and is easy to hook up. That said some complain about the lighting. They say it randomly turns the trailer lights on when the vehicle is off. Opinions are mixed on ease of installation, and value.
AI-generated from the text of customer reviews
Customers like the performance of the auto accessory. They say it works well, is easy to install, and has a nice set of trailer lights. Some mention that it is usable but not satisfactory for over a $100 purchase.
"...It took me under 2 hours to finish once I got the panels off, and it works GREAT!Lessons learned:..." Read more
"...Given the amount of use it has seen, this unit lives up to the quality I've come to expect from tekonsha products, and the fact that it installs..." Read more
"...This allows you to trailer without splicing. Once installed worked without incident. I would strongly recommend." Read more
"Incredibly nice kit, comes with EVERYTHING you need. Easy to install with a quick search on youtube for a installation video...." Read more
Customers appreciate the auto accessory doesn't need cutting wires or splicing cables.
"...It doesn't need cutting wires, so I didn't run the risk of messing up electrical wiring in other parts.Here is what I did:..." Read more
"...no cutting or splicing cables needed...." Read more
"...on etrailers.com This is perfect for BMW's because you do not have to splice any wires that could complicate the electrical system...." Read more
Customers are mixed about the ease of installation of the auto accessory. Some mention it's easy to hook up and works good, while others say it'll require splicing into the canbus system. That said, some say the instructions could be a little more clear and the provided documentation was not helpful with troubleshooting.
"...The system is pretty simple once you understand it...." Read more
"...Install was a pain, it took me a few hours to take the trim apart in the rear of the car, and find wires to pull all of the necessary signals from...." Read more
"Incredibly nice kit, comes with EVERYTHING you need. Easy to install with a quick search on youtube for a installation video...." Read more
"This is so easy to install that I’m not sure if it really counts as an installation. Either way it’s installed/attached to my ‘16 BMW X5...." Read more
Customers are mixed about the value of the auto accessory. Some mention that it's worth the extra money, while others say that it isn't worth $135 at all. Some say that the kit is a little pricey, while other say that is wasting money for how complicated it is to install.
"...Great price compared to other online sources." Read more
"...This universal module seems to be great idea but it was a waste of $150." Read more
"...This kit is worth the extra money. Good luck" Read more
"This was very easy to install, worked great and saved me a lot of money by avoiding the BMW dealership and their..." Read more
Customers are dissatisfied with the lighting of the auto accessory. They mention that it randomly turns the trailer lights on when the vehicle is off, drains the battery, and the running lights blink and flash intermittently. Some say that the tail lights will continue to be on, even after they turn off the engine.
"...It's that the tail lights will continue to be on, even after I turn off the engine...." Read more
"...The module randomly turns the trailer tail lights on even when the vehicle is off...." Read more
"...of which module was connected - left/right/brake/tail - the running lights blink and flash intermittently with car on or off...." Read more
"...However, once installed, and programmed the trailer tail light would not work properly...." Read more
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Top reviews from the United States
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I looked far and wide to find a wiring system that would work with a non-trailer-ready BMW (U-Haul said there was nothing out there - Ha!) I found more info than what was on Amazon on etrailer, and they had a decent video that really helped. And on their site, you put in your specific car and it tells you which harness/hitch/killer cassette stereo, whatever will work on your car. The Tekonsha 119251 kit was for ours. Went to the Tekonsha site just to compare prices, did the same exercise, and it came back with nope, there isn't anything that will work on your car. Well that's a wee bit troubling, right? I sent Tekonsha an email, got a response 2 hours later saying, yup, the 119251 is for you! Woohoo! So thanks for the GREAT info, etrailer and Tekonsha, but I bought the kit from Amazon where it was WAY cheaper, used the etrailer video to get me started, and went to the garage to rip out the innards of the back end of my wife's car.
What you need to know first, is that this does work! Take your time, you'll get it.
I think the hardest part is determining what setup your car is. And it's not exactly clear in the newer models. Is it a 2-wire, 3-wire, BT (brake/tail light multiplex), or a BTT (brake/tail/turn multiplex) system? On the BMW it has 4 wires going to the tail light assembly, so not a lot of clues there!
I decided to start with what worked on the 2017 model that was in the etrailer video, meaning I was only going to hook up 3 of the 4 sensors, leaving out the Brake sensor which would imply (according to their instructions) that this was a 2-wire system (with 4 wires going to each light...so it makes total sense.) 😎
The video said the turn signals were on a white with purple striped wire on the 2017, of course there was none of that in the 2021 model. But there WAS a purple wire with white stripe on both the driver and passenger sides. Let's give that bad boy a shot! There was also a green and blue wire in the bundle. The others were solid colors.
After temporarily hooking up the sensors, I ran through the completely simple programming, attached the trailer and voila!
Yeah, that didn't work.
Turns out on the right (passenger) side, the blue and green was turn signal. I found that out by just trying it. Once I found out that only the multi-colored wires mattered, it was simple. Try it. If it doesn't work, switch the sensors. Try it again.
It took me under 2 hours to finish once I got the panels off, and it works GREAT!
Lessons learned:
-Doesn't come with a trailer light tester or voltage sensor, both of which would be useful. You don't need them if you have patience and a trailer right next to your car in the garage.
-The sensors are kind of big when you're trying to get them in the middle of tightly packed wire bundles, so plan to cut back on the tape or whatever is holding the wires together a little more than you think you need.
-I went full high-tech during the install, using Scotch tape to hold the sensor and wire together until I found the combination I needed. Once done, took the tape off, and worked a while getting that foam tape stuff they send with the kit around the wire and sensor while not wrapping the other wires from the tight little bundle in there with them. It sounds simple, but if you heard the language coming out of my wife's car at that point, you may have a different take on it.
-I used a zip tie (included in the kit) at a point about ¼"-⅜" below each sensor to hold the sensor and the entire wire bundle together. This also helps keep the sensor from sliding up and down the wire going over bumps. I don't know that it matters, but I was on a roll and was feeling it after hitting the right combination of sensors and wires, so why not?
-Important note: I witnessed while having the sensors not set up right, that sometimes the trailer lights would remain on with the car completely unpowered. I also read online that this bad boy sucks battery juice all the time. So you need to either install an inline switch or just pull the fuse when not in use. I zip tied a ziplock bag (snack sized, fuses are small) to the yellow fuse wire, and have the fuse in there. Don't forget this if you're going boating! A dead battery in your car/truck will not make the Admiral happy at the boat ramp at the end of the day.
I completed this conversion project yesterday, and other than being a little sore from playing contortionist (hey man, I'm almost 60), I'm pretty pleased with the kit and this whole process. The videos on etrailer are invaluable, so watch them first. Then go for it. You won't hurt your car, and if you've set it up wrong, just try again. The system is pretty simple once you understand it.
I would highly recommend this to anyone who wants to hook up their own trailer wiring harness. Good luck and happy trailering.
Given the amount of use it has seen, this unit lives up to the quality I've come to expect from tekonsha products, and the fact that it installs without splicing into the canbus system on newer (or euro) cars is great, as there is zero chance that it, or a janky trailer, can malfunction and cause problems with your vehicle's electrical systems.
As a quick background, I installed a trailer hitch for my 2009 BMW 328i for the coming 3000-mile cross-country move. I got the hitch installed by Uhaul because I didn't have the time to install it on my car, and it came with an installation warranty and damage protection for breakdowns, among other benefits.
BUT..... Uhaul wouldn't do the hitch wiring installation because, apparently, BMW tail light wires are too thin, and they don't want to risk messing up the electrical system. I called multiple mechanics, including BMW dealerships. But no one would do it !!!!
So I did A LOT of research, then I came across this product. I had no option but to tackle this head-on. I'm the type of person who fixes my car, but electronic stuff was not something I ever touched, so it was challenging. I'm not gonna lie. There were doubts in my mind about everything I did when I was installing this. You can find me asking noob questions here in the questions section too.
If you are in my situation--where you cannot find ANY trailer lighting installation info in the internet for 2009 BMW 328i, this is the solution here bro. It doesn't need cutting wires, so I didn't run the risk of messing up electrical wiring in other parts.
Here is what I did:
1) I bought a multi-meter thing. Set the multimeter to 20V reading. I learned that car wires run anywhere from 15 to 25 volts of electricity at a given point in time. I didn't use the AMP setting because AMP requires a complete circuit, meaning the multi-meter has to be within the circuit of whatever I am testing. With a V reading, I just need to connect the black to ground (car battery has a ground), and touch the red pin to the tail light. I would turn on right turn signal and touch the multi-meter needle in different parts of the tail light connection to find which wire leads to a turn signal.
2) One of the most confusing thing I found was the fuse. I didn't know what fuse was, and I still don't know what it is. It sounds like it's something that blows up when there is too much electricity building up when I connect the positive wire to the product's black-box. This is really simple. The product comes with a 15 amp fuse. Just plug the fuse into the T-fuse insert. connect the T-fuse wire to the positive wires. This is in the instruction manual.
Anyhow, when I tested after installing this, IT WORKED. Im so glad. I have a peace of mind now.
Now, if you've done a lot of research like I have, you will notice that this product has one problem. It's that the tail lights will continue to be on, even after I turn off the engine. So, what I will do is basically unplug the 4-pin each time I have to leave the car, so it doesn't drain the car battery.
I hope this helps :)
Top reviews from other countries
Wiring harness that uses Induction Technology that picks up towing vehicle signals and forwards them to the trailer wiring harness ....WITHOUT SPLICING into EXISTING wiring of the towing vehicle.
Safer to use than splicing into wiring on cars that have sensitive sensor and computer systems.
Product is as Advertised and was delivered a week before the expected Delivery time.
It is important that you follow the installation instructions exactly. Also do watch the manufacturer's video about testing and installation.
Also get a simple 4-wire tester prior installation, it speeds up wire selection if not able to get to harness plugs
Reviewed in Canada on June 3, 2022
It is important that you follow the installation instructions exactly. Also do watch the manufacturer's video about testing and installation.
Also get a simple 4-wire tester prior installation, it speeds up wire selection if not able to get to harness plugs