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Tekonsha ZCI™ Zero Contact Interface Universal ModuLite® & Installation Kit

4.1 4.1 out of 5 stars 199 ratings

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  • 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

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From the manufacturer

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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.

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Warranty & Support

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Tekonsha ZCI™ Zero Contact Interface Universal ModuLite® & Installation Kit


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What's in the box

  • Automotive Accessories, Electronics, vehicle-wiring-harnesses
  • Product guides and documents

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    Price$205.30$29.99-33% $9.99
    List:$14.99
    $18.99-35% $100.59
    List:$155.29
    $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
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    Value for money
    3.3
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    Customer reviews

    4.1 out of 5 stars
    4.1 out of 5
    199 global ratings

    Customers 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

    28 customers mention21 positive7 negative

    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

    3 customers mention3 positive0 negative

    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

    28 customers mention18 positive10 negative

    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

    7 customers mention4 positive3 negative

    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

    5 customers mention0 positive5 negative

    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

    Tekonsha 119251 ZCI Zero Contact Interface  for 2013 Audi A6 trailer lights
    5 Stars
    Tekonsha 119251 ZCI Zero Contact Interface for 2013 Audi A6 trailer lights
    There isn't much info on the Audi A6 with a trailer hitch. Who puts a hitch on an A6 right? Well I did, this car has a ridiculous amount of wiring and controls and very little info on installing trailer lights. The lights are PWM (pulse width modulated) LED lights. There are many wires to choose from so you need a wiring diagram or it can be done by process of elimination as I did. The Audi is actually easier than most cars since the battery is in the trunk and there are lug terminals for the ground and 12v available.First you need a few tools: Wire strippers, wire crimpers, 4 pin trailer test plug LED's, tools to pry back the panels and pop the spring clips, on my car I also needed a torx screw driver and 10mm sockets to get the bottom panel off.The easiest way that I found was to use the tail lights that are in the rear fenders and then go through finding the turn signals, brake light, and driver running light (DRL) by process of elimination. This step took a couple hours. You will need to place the car on a battery charger or start it once and a while. Most of that time is removing panels and tape wrapping to get to the wires. Once you have access it's not hard.1. Start finding a home for the controller, and mount the controller. Keep in mind you will need to get to this controller if you blow a fuse or need to reset the light 2. Wire the constant 12v positive and negative in. Crimp on the fuse holder to the positive wire and controller. 3. Unless you have a wiring diagram you now start the process of elimination for your lights. If you have an Audi with rear driver running lights you will need to turn those off when using the trailer and doing this setup. (it's in your car menu). In the Audi you can get the 3 of the four lights on the right side so I started there. I pulled the wires apart enough to clamp 3 of the sensors on. Then on the left side I clamped one sensor on. 4. Plug your light tester into the 4 pin trailer plug. Insert the fuse, go to the car, turn on the power, turn the headlights on, press the brake for 6 seconds, put the turn signals on for 6 seconds each. Look at your tester when you touch the brake, cycle the DRL, and turn signals. Chances are you'll get something on your first try by not all. Just keep repeating this process until all lights are found with the sensors. 5. Then permanently fix the sensors on the wires with the provided tape and zip ties. Make everything pretty and put all your panels back. You will need to reteach the lights if your battery goes dead or you blow a fuse. This is easy, just pull the fuse, plug it back in, and turn on each light for 6 seconds. I ran into this when I plugged a U-haul trailer in and kept blowing my fuse due to a short in the trailer wiring.
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    HECTOR J LOPEZ
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on February 2, 2021
    David Tran
    5.0 out of 5 stars It works as expected
    Reviewed in Canada on July 25, 2019
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    Augustine
    5.0 out of 5 stars Took a while to figure out but it works
    Reviewed in Canada on June 3, 2022
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    Augustine
    5.0 out of 5 stars Took a while to figure out but it works
    Reviewed in Canada on June 3, 2022
    After some trial and error, it works.
    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
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