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Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End

Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End

Item # 20142

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Tow Ready Wiring - 20142
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  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • 7 Blade
  • Plug Only
  • Tow Ready
Designed for use with vehicles that have lamp-out sensors, this adapter ensures that your trailer with LED lights does not trigger any warnings or hyperflashing when hooked up to your vehicle's 7-way, blade-style connector. Lowest Prices for the best wiring from Tow Ready. Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End part number 20142 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (60)
  • Q & A (118)
  • Videos (1)
  • Photos
  • Why etrailer?

Tow Ready Wiring - 20142

Designed for use with vehicles that have lamp-out sensors, this adapter ensures that your trailer with LED lights does not trigger any warnings or hyperflashing when hooked up to your vehicle's 7-way, blade-style connector.


Features:

  • Bypasses your vehicle's lamp-out sensor so that you can tow a trailer with LED lights
    • Prevents your vehicle's computer from sensing that a trailer light is burned out, which is how it would normally read the LED lights on the trailer
  • Designed for use with vehicles with Lamp-Out sensors - such as Audi, Mercedes-Benz, Volkswagen, and Porsche
  • Plugs into the 7-way, RV-style trailer connector on your vehicle
  • Provides a new 7-way, RV-style trailer connector that works with trailers that have LED lights


If you have a vehicle with a factory tow package that has a lamp-out sensor and you tow a trailer that has LED lights on it, then you've likely experienced hyperflashing and/or false computer errors. Because LEDs pull such a small amount of power, certain sensors are unable to detect them. The result is a warning in your vehicle that continuously tells you that the trailer lights are not functioning. In addition, the lights on your trailer may not illuminate properly because of your vehicle's inability to recognize LED lights. This can lead to either hyperflashing lights on the trailer or lights that will not illuminate at all.


This adapter has a built-in bypass system that is designed to eliminate these problems. Just plug the adapter into your vehicle's 7-way, RV-style trailer connector and you're good to go. Plug the wiring connector from your LED-lit trailer into the adapter's 7-way, blade-style receptacle and the trailer's lights will illuminate as they're supposed to, without triggering errors in your car's computer.



20142 Tow Ready 7-Pole Blade to 7-Pole Blade Trailer Connector Adapter for VW, Audi, Mercedes-Benz, and Porsche Towing Trailers with LED Lights






California residents: click here


Video of Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Tow Ready Wiring - Wiring Adapters - 20142 Review

Today we're going to review part number 20142. This is the Tow Ready trailer connector adapter with the lamp-out sensor bypass, a 7-way to a 7-way. This part is designed for use with the newer European automobiles that have the lamp-out sensor. This adapter will bypass your vehicle's lamp-out sensor so that you can tow a trailer with LED lights. It will prevent your vehicle's computer from sensing that a trailer light is burned out which is normally how it would read the LED lights on the trailer. This is designed for use with the newer European automobiles such as Audi, Mercedes, Volkswagen and Porsche that have the lamp-out sensors. Basically this part here will plug into the 7-way connector on your vehicle and then it provides a new 7-way trailer connector right here that will work with trailers that have LED lights.

Basically what happens is you plug this into the, you plug your LED trailer connector into the adapter 7-way right here and then the trailer lights will illuminate as they're supposed to without triggering errors in your car's computer. That should do it for the review on part number 20142, the Tow Ready trailer connector adapter with the lamp-out sensor bypass, a 7-way to a 7-way. .


Customer Reviews

Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End - 20142

Average Customer Rating:  4.7 out of 5 stars   (60 Customer Reviews)

Designed for use with vehicles that have lamp-out sensors, this adapter ensures that your trailer with LED lights does not trigger any warnings or hyperflashing when hooked up to your vehicle's 7-way, blade-style connector.

- 20142
by:

This product was just what we needed to end the “bulb out” messages we were getting when pulling our LED- light equipped trailer with our Ford Escape. A timely arrival on the shipping, too. 514287


Comments

It’s still working well. We put it on when we use our hitch-mounted bike rack too, as it shuts off our backup warning sensor instead of having it constantly beeping.

Deborah - 05/31/2019

55946

- 20142
by:

This was a simple solution for towing a small trailer with LED lights with a 2015 BMW X3. 383461



- 20142
by:

I have a 2015 VW Touareg TDI with the factory towing package. No one in my area (Boise) knew how to install a trailer brake on it. So, I ordered a Tekonsha Prodigy RF Wireless brake controller and the lamp out sensor bypass plug. I installed them today and they work great withy Touareg! I would recommend this product to anyone with a German made SUV. Very hassle free and best brake controller I've ever used ! 203259



- 20142
by:

This product was exactly what I needed to get my GL450 to work with LED trailer lights. The overall converter plug with trailer lights does now make a 10" or so plug in connection and may be a concern for lower vehicles in off road conditions. The clearance is very acceptable for GLs for both on road and off road conditions. I only with there was a converter that I could wire directly to my trailer light harness (cleaner install) 141648



- 20142
by:

Bought this to use on a 2017 Ford F350 that was having trouble with trailer turn signal fault and trailer disconnected message would also come up on the dash. Finally figured out it was the LED lights on the trailer that were causing trouble with the trailer system on the truck. This adapter works great for that , even though it doesn't list it as working with a Ford. Very good product and very good service! 408923


Comments

Thanks for the Review Mike. I did reach out to my friends at Tow-Ready and confirmed that this item is not exclusively for the European vehicles, and will work with any vehicle that has a trailer lamp out detection monitoring system. The European models were leading the way with those electrical systems. Also if you happen to need a 7 to 4-way adapter the # TR20141
7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
$9.95
functions the same way. It just provides a 4-way for the trailer connector.

-- Rachael H - 07/25/2017

26592

- 20142
by:

This product is a lifesaver! I have a 2014 Range Rover and I just purchased a new trailer and for the life of me, the dealership, and the trailer manufacturer, we could not figure out why the electrical on the trailer would not work when plugged into the car. The trailer manufacturer confirmed the lights worked on the trailer, the dealership confirmed electric was going to the 7 pin connector on the hitch but for some reason the lights/brakes/etc would not work on the trailer. After doing some research on forums online, I was able to find out that the newer high end cars do not recognize the low power draw of LED lights on the newer trailers. This attachment is simple to use and created enough resistance for the vehicle to recognize the connection and is just a simple plug and play. Could not be happier. 462560



- 20142
by:

It worked perfectly as described. Fixed my concerns I had with my 2018 q5 tow hitch electric components. Thank you 571517



- 20142
by:

Product works, but flip top design is flawed and easily pops out of its spring position, preventing the top from locking in the trailer connector. This presents the poor situation that the trailer connector will vibrate out and you would lose trailer lights/brakes going down the road. Simple design fix would be a better placed and stronger spring for the top. Only solution with the current design is to push the spring back behind the swivel point to create adequate pressure or tie wrap it in place. Constant worry issue for this single weak point on the otherwise well made item. 95490



- 20142
by:

I am an amateur Porsche Race Car Driver and have a trailer that I pull my race car on. I pull my race car with a Porsche Cayenne Turbo S. I could never get the lights to work properly and hated to rewire as I use an american truck sometimes. Before installing the adapter, the lights would just blink and had no brake lights or signal lights.. The adapter I bought is a great solution for European cars and/or trucks. I purchased the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End and it works perfectly. The blinkers works. The brake lights work. I can't believe such an inexpensive solution solved my problem. Contact e-trailer before you think of rewiring any trailer. 481773



- 20142
by:

Solid, Well-Made, Does Exactly What It Should. HyperFlashing is Not Cool!!! I've been trying to track down a part which solves this problem for a while. I started using an LED-equipped trailer and the hyperflashing & computer warning messages are annoying! I almost settled for 20141, but glad I waited. Also, most retailers aren't receiving this part for another month or more. eTrailer shipped the same day as my order. NOTE: This works well with Range Rover also. Not related to the product: This was my first eTrailer order and I was VERY impressed. I spoke with two ladies regarding this part and eTrailer's customer service is TOP NOTCH. I will definitely order again in the future! THANKS! 83706


Comments

what year range rover does this work with. I just tried it on my 2008 LR3 and I still have the problem?

-- comment by: Art M - 07/18/2013

1769

It should work independent of year. Check your trailer connector and make sure the connections inside have not corroded for starters. Also check all the grounds of the trailer wiring and if applicable on the vehicle trailer connector. Ground issues cause most of the electrical gremlins in the trailer world. On 7-Way systems, corrosion inside the connector is another likely culprit.

-- Patrick B - 7/30/2013


- 20142
by:

Works great. Wish I found out sooner that I needed one of these and spent some time trying to figure out why the LEDs tail lights on a new camper would not work correctly with a 2008 Mercedes ML350. Called the camper company and they were not aware of this issue. Searching the internet for MB and LEDs and found your solution. Needs more marketing out there to let others know, maybe a way to let all trailer mfg some cars need one of these. Nicely molded and seems very durable. Thanks 505491



- 20142
by:

My tow vehicle is a Mercedes 2006 ML500 that had issues connecting with the improved LED lighting on my Airstream trailer. I had a choice of a $800 wiring upgrade or this; I tried this and couldn't be happier. Highly recommend to solve the problem - works well, sits in glove box, has held up to frequent use. Only comment - you have to be more firm when you insert It into the receptor - not a big deal, but a thought if you're having problems connecting. Great product, customer service - this company provides practical and reasonable solutions. I'm a committed customer. 276660


Comments

Still working perfectly! Has held up well to multiple use, good product. Very happy.

KM2016 - 07/27/2017

26647

- 20142
by:

Got my LED trailer lights work in on my Audi! I had a small issue with the spring hinge, which broke on the first unit. E-trailer was outstanding and promptly sent me a new one with a return authorization for the old one. The new one works perfectly, and I would definitely order from E-trailer again! Excellent customer service, and they promptly addressed my minor issue with the first product. 92109


Comments

Still working great! E-trailer just sent me an e-mail to see if I was still happy with the product. Great customer service!

S. S - 01/27/2015

8949

- 20142
by:

Great so far -- bought this to connect a Mercedes ML350 suv to a Flagstaff travel trailer. As is mentioned many times in different trailering forums, some European vehicles have an issue with false sensor readings when connected to a trailer with LEDs. I had the same exact issue and this adapter seems to have fixed the problem perfectly. Time will tell as we go on our first big road trip with the travel trailer next week. But for now, looks like a winner. 657742



- 20142
by:

I ordered this to deactivate the rear sensors on my 2016 BMW X5 when I have my Kuat bike rack attached to the trailer hitch. It works as expected. Very pleased 649630



- 20142
by:

This device resolved our Prodigy RF brake controller communications issue and saved us a trip to an RV dealer and/or countless hours of aggravation. Our Cayenne diesel is a fantastic tow vehicle, however, the "smart" electronics of German vehicles can be troublesome for towing configurations such as ours. This device may reduce the clearance of trailer wiring to the ground - depends on your wiring receptacle orientation and height. We also chose to add an additional strap wrapped around the adapter cover to ensure the trailer wiring did not unexpectedly disconnect itself. Thanks etrailer for your assistance and guidance towards this product to resolve our issue and get us safely on the road again. 646863



- 20142
by:

Happy. Does exactly what it's supposed to do. During research I found that this plug is needed for my 2016 VW Touareg TDI. Then I read one person saying it's fine without this plug. Whatever the truth is, this product works and has not given me any problems. 628399



- 20142
by:

Just what I needed for my Audi tow vehicle. Thanks! 612098



- 20142
by:

Great product solved LED trailer light problem 2008 Mercedes ML 584243



- 20142
by:

This adapter worked as described. It allows me to have a LED brake light connected to the trailer receiver on the back of my Sprinter. It took me a while to comprehend why I was having so much difficulty connecting up a simple LED light to the Sprinter 7 pin receiver. It would flash every two seconds with the power to the Sprinter off and not light up on pressing the brake pedal. The issue is that German machines have 'smarts' related to the 7 pin receiver such that the driver is warned if an old style bulb on the trailer is not working. Until you know this fact it will 'drive you crazy'. This device provide 'electrical loads' so the Sprinter thinks there is a trailer with bulbs connected. 582812



- 20142
by:

Bought to stop the annoying beeping when in reverse while the bike rack is mounted on the hitch. It did stop that but disables other safety features in the car. While not an etrailer issue, I hadn't expected it. 553425



- 20142
by:

The item ordered was exactly what was needed to allow my Mercedes with lamp out technology to pull a trailer that had LED lights. Works great! 449319



- 20142
by:

Does as labeled. Prevents VWs light bulb fault detector from failure when use with LED trailers. Also fix issue with break controller. 427863



- 20142
by:

It does what it says. I have a 2014 Mercedes Benz GL550 and the trailer lights would not work on an Airstream trailer at all. Even the dealer, while aware of the problem, did not know the solution. I ordered the adapter and it totally took care of the problem. The Airstream Dealer is also putting the adapter into their inventory for future customers. Very nice...Thank you 425131



- 20142
by:

Does what it says.... works great. 395951



- 20142
by:

Solved a vexing problem!! The adapter allowed me to connect my car hauler trailer to my Mercedes SUV after trying many failed ways. Thank you!! 385528



- 20142
by:

I needed a trailer hitch light to see at night in reverse for my Mercedes GL450. I used this adapter to allow the light to work. Without it the car would not recognize the light, it has a complicated trailer control module and this was used to trick the computer into sending the signal to the light 381106



- 20142
by:

Totally useless on 2007 Mercedes ML 320 CDI built in October of 2006. 374084



- 20142
by:

Arrived on time and, best of all, it solved my problem! 356811



- 20142
by:

I had extreme difficulty locating a trailer light adapter for my Mercedes GL350. Etrailer helped me order the correct adapter which I just received and it WORKS! They were so patient with me and very knowledgeable about their products. I will definitely order from them again. Excellent service, free and FAST shipping. Thank you Etrailer. 351731



- 20142
by:

I've used this towing a travel trailer with a VW Touareg TDI nearly 12,000 miles since I purchased it. It solved my problem with the connection between my Oliver Travel Trailer and the Touareg that caused issues with the lights, turn signals, etc. As I've used it, it actually improved with time in terms of the ease of connecting to the Touareg. 346933



- 20142
by:

It just works! I don't have to think about it. 2011 GL450 340833


Comments

It just works - dont even have to think twice about it.

Stephen Y - 02/11/2018

34564

- 20142
by:

As usual excellent quality and prompt s ervice. 335055



- 20142
by:

Order processed mailed delivered overnight. Great service. 330329



- 20142
by:

Product and service are outstanding. I will continue to use this etrailer. Highly recommend. 318609



- 20142
by:

Solid product, just didn't fix my issue with my 2006 Land Rover. 310070


Comments

Sorry to hear that it didnt work for your application, Trevor. I see that Suzanne is currently working on helping to return this product.

-- Laura E - 10/31/2016

21668
Comments

Didnt resolve my issue, sold the car.

Trevor G - 10/24/2017

29861

- 20142
by:

Worked great for my 2015 Porsche Cayenne and a trailer that has the brake controller on the trailer. 303714


Comments

Has been working fine for my 2015 Porsche Cayenne. Have told many others about it as well.

Kirk E - 10/06/2017

28795

- 20142
by:

First I must say YOU were terrific. I was in a tight spot needing this item before I could travel. You were kind, courteous and the item was delivered a day before I needed to use it! You are now my ONLY supplier!!!! Thanks! 262336



- 20142
by:

This product is a must have for Mercedes vehicles if want to run led trailer litghs, I spend 5 hours trying to find the problem for my non working trailer lights. Found this product and fix my problem in 5 minutes. All signals and led working properly 260566



- 20142
by:

TOPS the swervice was the fastest.. Great Store... 237205



- 20142
by:

This is just what I needed for my 2011 BMW X5d, which has LED taillights, and my new trailer also with LED lights. All trailer lights work and no warning messages on the X5. Thanks etrailer. 234561


Comments

Continued to work flawlessly all year - including a tow from CA to TX and back again.

Jim B - 01/18/2017

22246

- 20142
by:

Works great with my Audi Q5. The LED lights on my trailer do not now send a faulty signal with the Audi computer . Installed on an Audi Q5 2016 model with absolutely no problems! Great product 230683



- 20142
by:

Nice product----just did not work for my '09 Range Rover and trailer with LED tail lights. 210454



- 20142
by:

After two and a half hours of checking car and trailer wiring I finally went on the internet to get some answers. If you have a late model euro vehicle, and a trailer with LED lights, this 20142 solves the problems you may be having. It has something to do with your vehicle wanting to complete a circuit but, the LEDs draw such little current it sends your euro vehicle into a tail spin and you get some weird faults. This product solved the problem for me and may for you. 209948



- 20142
by:

Works as advertised. Simple to use. Appears to be good quality. 204216



- 20142
by:

works perfectly great with my bmw x6 2010. Good product for a good price. 203900



- 20142
by:

I was told I would need this but did not, but better to be safe then sorry. 180277



- 20142
by:

They need to make this item smaller and shorter. It adds length and weight to the vehicle plug and it only held by the tab. It puts stress on the vehicle tab that may break it or pull it out if you hit a big bump. 180173



- 20142
by:

This review is for the ordering process and delivery. I work for an auto dealership and we needed to purchase some items for one of our customer's vehicles. I ordered the items and requested overnight delivery so we could get them installed quickly and get the customer their car back. I was hoping it didn't take long to get it shipped. I ordered yesterday afternoon and received the item this morning. Excellent service! Thanks! 170676



- 20142
by:

This is a company that knows how to do business. They cover the 3 things I need to be a satisfied customer: 1. Quality parts. 2. Excellent customer service. 3. Knowledgeable staff The product was exactly what I needed on my 2014 Porsche Cayenne to haul a travel trailer with LED lights. 163939


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  • For your 2017 Range Rover Sport, I recommend the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142. This has load resistors integrated into the adapter so that there is a draw seen by your vehicle similar to the Incandescent light draw to make the LED lights and vehicle function correctly. This adapter should make your Range Rover Sport see the trailer correctly and allow you the features you mentioned for towing safely. The 7-Way Trailer...
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    view full answer...

  • Installing Brake Controller on 2009 BMW X3
  • It is difficult to install a traditional brake controller on a 2009 BMW X3, so much so that the best option is to use the Prodigy RF, # 90250. It does not involve taping into the vehicle wiring. Instead, this unit plugs into the 7-Way trailer connector and your trailer connector would then plug into the RF. It uses the power provided from the 7-Way to apply the electric trailer brakes. It has a built-in accelerometer that senses how hard or soft the vehicle is braking and applies the...
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  • Adapter to Allow Towing Trailer with LED Lighting with 2012 Land Rover Range Rover
  • The Tow-Ready trailer connector adapter # 20142 is designed to work on a range of European import vehicles. This adapter will prevent the low current draw from your trailer's LED lighting from triggering error messages on your Range Rover dashboard display.
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  • Troubleshooting Difficult Pairing of Prodigy RF Brake Controller with a 2016 Mercedes Sprinter
  • The issue you are having is not uncommon for German vehicles like your 2016 Mercedes Sprinter. There are a few things you can try to get the unit to pair. First, If you do not see displayed what the instructions say just keep going through the steps. Sometimes, it will not display what it is supposed to but it will still work if you go through the steps to completion. If that does not work then you can try taping off the pin in the 5 oclock position at the back of the RF (where the...
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  • Will the Prodigy RF Brake Controller Work with a 2014 Mercedes M350 Bluetec
  • The Prodigy RF, # 90250, is not vehicle specific so you can use it with your 2014 Mercedes M350. There have been some pairing issues with German made vehicles. One solution is to have another vehicle parked next to the intended tow vehicle and pair it with that vehicle. Since you do not have that option there are some common things that have caused people to stop the installation set up because they think there is a pairing issue. Basically one problem is that some customers do not...
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  • Is a Special Converter or Adapter Needed to Tow a Trailer with LED Lights
  • Most aftermarket trailer wiring harnesses are compatible with LED trailer lights but I would need to know the year, make, and model of the vehicle to be sure. Factory tow package wiring usually works fine but German vehicles (Volkswagen, BMW, Audi, Mercedes) can have issues since the LED lights draw far less power than incandescent lights. I have heard of only a few cases of other vehicle manufacturer tow package wiring being an issue with LED lights. But even if the low power draw causes...
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  • Prodigy RF Brake Controller is Not Pairing with a 2014 BMW X5
  • The issue you are having is common for German vehicles. There are a few things you can try to get the unit to pair. First, If you do not see displayed what the instructions say just keep going through the steps. Sometimes, it will not display what it is supposed to but it will still work if you go through the steps to completion. If that does not work then you can try taping off the pin in the 5 oclock position at the back of the RF (where the trailer plugs into) using electrical...
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  • Problems Pairing the Prodigy RF Brake Controller with a 2010 Porsche Cayenne
  • When you are trying to pair the Prodigy RF brake controller, # 90250, sometimes the display does not read what the instructions say it should read. What happens for most people is they stop and start over or try to figure out what went wrong. What you will want to do though is just keep going through the installation steps as if it did read what the instructions say it should. There is also an issue on German made vehicles with the factory 7-Way and bulb out sensors. It does not sound...
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  • Installation of Trailer Connector Adapter w/ Lamp-Out Sensor Bypass with RF Brake Controller
  • I spoke to my contact at Cequent, the manufacture of both the RF brake controller # 90250 and the Sensor Bypass # 20142, and he informed me that you will need to insert the bypass into the vehicle end plug. It will not work properly being inserted into the brake controller plug. He also told me that the RF does not have the resistors in it, so you will need the bypass # 20142 to have your LED lights work. The lamp-out sensor bypass does have the resistors built into the unit. Bypass...
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  • Does the Lamp Out Bypass adapter part # 20142 Use Resistors to Prevent Lamp Out Error
  • The Lamp Out Bypass adapter part # 20142 that you referenced basically just has resistors in it to simulate the load of incandescent bulbs to prevent the lamp out error. It could be that the resistors you installed on your trailer have enough resistance to get the lights to function properly but not get rid of the error message.
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  • Will the Prodigy RF Brake Controller Work with a 2015 Volkswagen Touareg
  • Yes, you could use the Prodigy RF brake controller, # 90250, with your 2015 Volkswagen Touareg. but you may end up needing a special adapter, # 20142, if you have a hard time getting the RF module to pair with the handheld unit.
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Info for this part was:

Photos by:
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Expert Research:
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Written by:
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Expert Research:
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Expert Research:
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Expert Research:
Adam R
Updated by:
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Expert Research:
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Updated by:
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Updated by:
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