1. Wiring
  2. Tow Ready
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 7 Blade
  6. Plug Only
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
lowest price pledge
Our Price: $68.25
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.53 lbs
Quantity: 
In Stock
20142 - Single-Function Adapter Tow Ready Wiring
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

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 (69)
  • Q & A (132)
  • Videos (1)
  • Photos
  • Why etrailer?

Tow Ready Wiring - 20142

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • Plug Only
  • 7 Blade
  • 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.


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   (69 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:

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



- 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:

The product does not work on Mercedes Benz vehicles that have led lights. It was suppose to resolve my voltage difference between the led lights (8-9 volts) and the rear view camera that requires 12 volts. That never happened. I rewired camera to run off interior lights instead of using device 729520



- 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:

Solves foreign caritis. Simple solution. 688629



- 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:

This adapter saved our sanity! Our 2019 F350 kept giving us the ‘trailer disconnected’ warning constantly while pulling our fifth wheel. We researched the problem online and realized that our truck wasn’t sensing the led lights due to their low voltage. Took the truck to the dealer who assured me they could fix it however the first time we took it out and I adjusted the trailer brakes I started getting the message again . So tried finding an adapter to bypass the bulb out sensor on the truck. I found this via a google search . Plugged this in, and no issues since!! It is awesome and such a good price! I would recommend this to anyone who is towing a trailer with led lights with a Ford truck. 715944



- 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:

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



- 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:

This was a suggested part to allow my wireless trailer cam to function properly. Works great! Solved my problem. 724752



- 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:

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:

It worked as described on my ML350 661129



- 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:

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:

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:

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
$22.48
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:

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:

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:

Worked perfectly for my 2017 GLS550. One thing to note. I had a hitch put on by the Mercedes-Benz dealer so this wasn't an aftermarket hitch and harness. I had trouble even after purchasing this adapter, but it wasn't the adapter that was the problem. It was the fact that the trailer module that sends the signals can be programmed into two different modes. One for EU trailers and the other for US trailers. This manifests it's symptoms as ever light works (turn, running, flashers) BUT the Brake. In EU configurations, EU trailers use a completely separate wire to light the brake lights up. In the US, it's both of the turn. So, after purchasing several different adapters like this one (which I still like and kept), and three different trailers doing the exact same thing, the dealer had me bring in my vehicle and my trailer to troubleshoot. After about 30 minutes and a reprogram, trailer brake lights worked flawlessly. 756631



- 20142
by:

Perfect solution for the problem of using LED light bar on towed vehicle behind Sprinter chassis RV. This adapter plugs into the 7 pin of RV, light bar remote transmitter plugs into adapter. The built-in load resistors activate the Sprinter tow module and allow the function of light bar to work correctly with no modification to wiring. Great solution. 691368



- 20142
by:

What a great little piece of electronics. After having several different experts spent hours trying to solve my hyper flashing turn lights and fault warnings on my older Rover, and being told I would just need to “live with it”, I looked on the etrailer.com site and found the l solution. After plugging in the Tow Ready Wiring device all my problems were solved instantly. My Thanks to the engineers. 681413



- 20142
by:

Works well, does exactly what it is supposed to do. Fast shipping from etrailer. Great communication. 671366


27
71
Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • Difference Between Tow Ready # 20142 and Curt # C57003 Adapters with Lamp-Out Sensors
    If you will be towing a trailer with LED lights then you will likely need to use an adapter with a lamp-out sensor like the Tow Ready # 20142 or Curt # C57003 that you referenced. Both of these adapters will accomplish the same task; plugging into an existing 7-Way on your Audi and providing a new 7-Way that is able to recognize the LED trailer lights. The only difference between the two items is the bracket/housing and the wire extension on the Curt # C57003. If you don't need this and...
    view full answer...
  • Troubleshooting Trailer Disconnected Alert Alarm on 2018 Toyota Tundra
    There is an adapter to help with LED trailer lights that has the load resistors you are seeking. It is the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142. The issue when trailer disconnected alarm or alert comes on is normally specific to your electric brake controller output pin which is normally what senses a slight draw and communicates that the trailer is connected. The 5 o'clock pin on your 7-way is the brake controller output...
    view full answer...
  • Solution for Range Rover When 7-Way Adapter for German Cars 20142 Does not Work
    We have heard before that for some Range Rover owners the part # 20142 did not work like it should. In those situations we have to recommend installing load resistors on the trailer lighting circuits so that the correct load is seen for the vehicle. For that we have the part # P230004A-2 which includes a pair of resistors.
    view full answer...
  • 7-Way to 4-Way Trailer Connector Adapter to Power LED Trailer Lights with 2017 Mercedes-Benz GLS AMG
    Adapters like the Tow Ready # 20142 are for a 7-way trailer connector on a vehicle to connect to a 7-way on a trailer. If your 2017 Mercedes-Benz GLS AMG has a 7-way connector and your trailer has a 4-way you can use the # TR20141 which has load resistors to work with the LED lights on your trailer. The alternative is to install load resistors like # P230004A-2.
    view full answer...
  • 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.
    view full answer...
  • Can Lamp-Out Sensor Trailer Connector Adapter be Used on a Ford F-150 Towing a Trailer with LEDs
    We've had customers use the lamp-out sensor trailer adapter, part # 20142, with Fords and it's worked great for them. The page mentions Audi, Mercedes-Benz, Volkswagen, and Porsche but those are just examples of vehicles that are known for having the lamp-out sensors. The # 20142 isn't actually vehicle specific and will work on your F-150.
    view full answer...
  • 2017 Ford F-450 Not Recognizing Trailer with LED Lights
    Yes, the best option we have for you is to use the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass part # 20142 which is for vehicles that have trouble using trailers with LED lights due to the minimal amp draw they have. I cannot guarantee this will fix your problem as we have not tested it yet but it is designed to fix pretty much the same issue on similar vehicles so I do not see why it would not work for you as well. If not, it can always be returned for a refund.
    view full answer...
  • What 7-Way Harness Fits a 2001 Toyota 4Runner With a Factory 4-Flat Tow Package Connector
    In order to convert your 4-way to a 7-way on your 2001 Toyota 4Runner that has a tow package, you will need the Universal Installation Kit # ETBC7. Installation time can range up to 3 hours. You were informed correctly, the black wire in the kit will need to be run to the battery. I have attached a short installation video with this kit on a 2011 Toyota Highlander. Although the vehicle is different, the installation will be similar.
    view full answer...
  • Adapter to Allow 2019 Mercedes GLS450 to Tow Trailer with LED Taillights
    Newer European vehicles like your 2019 Mercedes GLS450 notoriously don't like trailers with LED taillights. For these situations the solution is the 7-way adapter part # 20142 which has diodes built into it so that the vehicle thinks a trailer with standard lights is being used.
    view full answer...
  • How To Improve Voltage On 7-Way Trailer Connector for a Mercedes Benz GLS550
    Yes, the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass part # 20142 will help you receive a full/constant 12 volt signal from the trailer connector pins on your Mercedes Benz GLS550. The device has built-in load resistors that work to bring the correct voltage up to the pins on the trailer connector. The low/varying voltage is common on German vehicles such as Audi, Porsche, BMW, and Mercedes.
    view full answer...
  • Trailer Connector Adapter w/ Lamp-Out Sensor Bypass Not Working on 2013 Porsche Cayenne
    If your Cayenne was designed for the US market and you are still getting the errors when using the adapter # 20142 then you likely need more power draw beyond the resistors in the adapter. You can achieve this by installing load resistors such as # P230004C-2 for a 2 pack. Wire one in line on the trailer side wiring on any affected circuits to create more draw so the vehicle thinks the LED lights are regular incandescent lights. If your 2013 Porsche Cayenne has a European configured...
    view full answer...
  • Towing a Trailer with 7-Way RV Style Connector with a Semi-Truck with a Semi Style 7-Way
    The 7-Way on a semi-truck is not the same as an RV style 7-Way and there isn't an adapter. What I recommend, instead of replacing the connector on the trailer, is to add the correct mating 7-Way on the truck. To do that you can hardwire in a 7-Way, # HM47210. For this 7-Way the white wire is ground, yellow is left turn signal and brake lights, green is right turn signal and brake lights, brown is the tail light wire, red is auxiliary power, blue is output to electric brakes, and purple...
    view full answer...
  • Does a 2018 Chev Silverado 2500HD Have Lamp Out Sensors
    The 2018 Chevy Silverado 2500 models do have the lamp out sensors as do more and more American made vehicles as they get more computerized. Whether your specific trailer will trigger the sensor or not is unknown as they do vary. If you find you have an issue, then I recommend the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142 which has load resistors to allow the trailer to function well without the vehicle having that lamp out error.
    view full answer...
  • Recommended Load Resistor Adapter for Furrion Observation Camera on Travel Trailer for Signal
    You can either use the Putco LED Light Bulb Load-Resistor Kit - Aluminum # P230004A on that camera power wire to draw the full 12V needed or you can use the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 that has an integrated load-resistor for that function.
    view full answer...
  • Using Tow Ready # 20142 Adapter to Fool Bulb Out Sensor in RV While Pulling Tow Dolly w/ LED Lamps
    If the sensor lamp you're seeing displayed is indicating that you have a trailer taillight bulb out, the Tow Ready # 20142 will indeed work. Since LED's draw a tiny fraction of the power that incandescent bulbs do, a vehicle with a bulb out sensor will think that you have a burned out bulb. The # 20142 has a load resistor in it that fools the sensor into thinking that more power is being drawn through the circuit. If you'd care to view a product description video featuring the # 20142,...
    view full answer...
  • Mercedes GL-Class Does Not Work with a Trailer with LED Taillights
    Mercedes vehicles do have problems with LED trailer lights. Fortunately there are special adapters that create more current draw that will allow the affected vehicles to tow a trailer with LED lights and not have that bulb out sensor issue. Since you have a 7-Way wiring harness on the Mercedes you can use the 7-Way to 7-Way adapter, # 20142 or the 7-Way to 4- and 5-Way adapter # TR20141 . With the adapter you will be able to tow your trailer with your 2011 Mercedes without a problem....
    view full answer...
  • Recommended Adapter For 2009 Volvo XC90 To Tow 2017 Airstream Sport 22 With LED Lights
    We have an adapter that may take care of the problem with LED lights on your new Airstream. I recommend using the Tow Ready Trailer Connector Adapter, part # 20142. This adapter bypasses the vehicle lamp-out sensor so you can tow a trailer with LED lights. This adapter simply plugs into the 7-way on your Volvo and you plug your trailer connector from the trailer into it.
    view full answer...
  • How To Check If the Tekonsha Prodigy RF Has Paired Correctly
    In regards to the Tekonsha Prodigy RF Wireless Trailer Brake Controller part 90250, the remote should indeed read "n.c" after you have set the power knob to greater than minimum. If you reconnect the trailer and the remote then shows ".c." that is a good sign the device is paired properly but in order to check you just need to apply the manual override and see if you get a readout. I will say that pairing can be difficult on certain vehicles, especially German vehicles like your Porsche...
    view full answer...
  • 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...
    view full answer...
  • Troubleshooting the Tenkosha Prodigy RF Brake Controller on 2014 VW Touareg
    Your 2014 VW Touareg has lamp-out sensors which can cause problems when trying to install the Prodigy RF 90250. Using the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 should remedy the problem because it will increase the draw on the system which won't result in an error being shown on your Touareg.
    view full answer...
  • Availability of Trailer Hitch of 2011 BMW 328i Coupe
    There are hitches available for the 2011 BMW 328i, but they are all designed for the sedan and wagon models, and wouldn't fit the coupe model. If you were wanting to carry bikes, you could carry up to two using a trunk mounted bike carrier. The Thule Raceway 2 bike model, part # TH9001PRO is without a doubt the easiest rack to install and remove. Rather than using the cumbersome buckle and strap arrangement used by other racks, the Raceway uses 4 cables that can tighten with the twist...
    view full answer...
  • 2011 Range Rover Sport Towing a Trailer with LED lighting
    The Tow-Ready trailer connector adapter # 20142 you referenced is designed to work on a range of European import vehicles. This adapter will prevent low current draw on your LED trailer lighting from triggering error messages on your Range Rover Sport dashboard display. Before installing this adapter it is suggested that you check that your trailer connector's contacts are clean and free or dirt or corrosion. You might also want to apply dielectric grease like # LT37534. I included...
    view full answer...
  • Parts Needed to Add 7 Way Trailer Connector on 2019 Mercedes GLS450
    It sounds like you're trying to add a 7 way connector to your 2019 Mercedes GLS450. I have a solution for you but there are no "plug and play" style connectors available for these vehicles so we'll need to cobble together some pieces to make this work- you'll need to first install a 4 way flat connector and then add in the 7 way. To start, I recommend using the Tekonsha ZCI # 119250KIT which allows you to clamp onto the wiring on your GLS450 to receive the signals you need to install...
    view full answer...
  • How to Disengage Electric Boat Trailer Brakes for Backing Up Trailer with 2011 Mercedes-Benz ML-350
    If your boat trailer uses electric brakes such as # 23-469 it is a good idea to unplug the trailer connector from the ML-350 before you back the trailer up to launch your boat. Boat trailers are more and more often being fitted with electric brakes since they are less expensive than hydraulic brakes, but just the same electricity and water are not the best of friends. You can also simply unplug your trailer brake controller or turn its power setting down to zero when you need to back...
    view full answer...
  • Taillight Converter Needed for 2012 Mercedes Sprinter
    You're going to need a taillight converter. A taillight converter will take three lighting circuits from your Sprinter, the right turn, left turn and brake lamp and combine those into two circuits that the trailer can use, right turn + brake lamp and left turn + brake lamp. I'd recommend the # 119179KIT. You'll also need a length of extra 16 gauge wire which is sold by the foot, part # 16-1-1. You'll need about 16 feet of wire, which is what our installer used in the video I've linked...
    view full answer...
  • Recommendation for Trailer Light LED Conversion to Prevent Hyperflashing
    Hyperflashing can be an issue with any trailer as it converts to LED lights from incandescent bulbs. It is all dependent on the wiring of your vehicle and the trailer harness converter. The good news is there are a couple easy fixes. If you have a 7-way trailer connection, you can use the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142 which has an internal load resistor. The other fix is to use an external load resistor like the Putco...
    view full answer...
  • Recommendation for Allowing Mercedes to Tow a Trailer with LEDs without Bulb Out Warning
    I have a solution for you, but as far as a simple adapter like the part # 20142 that would plug into your 7-way round there isn't an option available. Instead you would need to install load resistors on all of the taillight circuits of your trailer that have LEDs. For a pair you would want the part # P230004C-2.
    view full answer...
  • Troubleshooting Prodigy RF Brake controller Not Working with 2019 Ford Ranger
    Thank you very much for the details! Ford recently underwent an "upgrade" to the tow package wiring systems and really they are just a pain because they are super sensitive and don't always pick up when something is plugged into the trailer connector. Your 2019 Ranger isn't sensing the Prodigy RF 90250 so it isn't sending back power but this can be remedied with the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass # 20142 as this product puts a load on the 7-Way which, in turn, tells...
    view full answer...
  • Will Wiring Adapter # 20142 Prevent Hyperflashing of Taillights on Cargo Carrier of MB Sprinter
    Yes, the part # 20142 has load resistors built into them to allow them to prevent hyper-flashing that is caused by LED trailer lights. Or in your case cargo carrier lights.
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Lori W
Expert Research:
Jeffrey L
Written by:
DeAnne T
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.