1. Wiring
  2. Tow Ready
  3. Wiring Adapters
  4. Multi-Function Adapter
  5. 5 Flat
  6. 4 Flat
7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs

7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs

lowest price pledge
Retail:$26.13
Our Price: $15.55
You Save: 40%
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.33 lbs
Quantity: 
7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs 5 Flat,4 Flat TR20141
zoom in icon
slider vertical 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

Need help with installation?
Locate installers near me
Tow Ready 7-way connector to 5-way or 4-way flat connector is designed for use on vehicles with Trailer Lamp-Out sensors when towing a trailer equipped with LED lights. Lowest Prices for the best wiring from Tow Ready. 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs part number TR20141 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (256)
  • Q & A (190)
  • Videos (2)
  • Photos
  • Why etrailer?

Tow Ready Wiring

  • Wiring Adapters
  • Multi-Function Adapter
  • 5 Flat
  • 4 Flat
  • Plug Only
  • 7 Blade
  • Tow Ready

Tow Ready 7-way connector to 5-way or 4-way flat connector is designed for use on vehicles with Trailer Lamp-Out sensors when towing a trailer equipped with LED lights.


Features:

  • 7-Way RV style adapter to 5-pole and 4-pole flat trailer connectors
  • Designed for use on vehicles with Trailer Lamp-Out sensors - such as Audi, Mercedes-Benz, Porshe, and Volkswagen vehicles with the factory tow package
  • Plugs into a 7-way connector on the vehicle and 5-way or 4-way flat connector on the trailer
  • 1-Year limited warranty


20141 Tow Ready 7-Way to 5-Flat and 4-Way Trailer Adapter for VW, Audi, Porshe, and Mercedes-Benz Towing Trailers with LED Lights

Replaces V39008

Item # TR20141




California residents: click here


Video of 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs

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




Video Transcript for Tow Ready 7-Way to 5-Way/4-Way Trailer Adapter Review

Randy: Hey, guys. It's Randy here at etrailer.com. We often get questions from our customers about how they can get their seven pole on their vehicle to work with different types of trailers.What we're looking at here is a four and five-pole adapter, so this is going to allow you to use the standard four-pole plug that you're going to find on most utility trailers. This is going to have your ground, running lights, left turn and brake signal, and right turn and brake signal. You can also see we've got our fifth pole here. It looks a little bit different than a standard four-pole adapter.

This allows us to send a reverse light signal through this plug back to our trailer. In most applications, that's going to be used on marine trailers for the lockout circuit on surge brakes, but it can also to used to power backup lights on your trailer. So you've kind of got options there.Additionally to those things, helping it work for multiple trailers, it also has resistors that have been built in. On some vehicles, especially European vehicles that we see, when they have a factory seven-pole on them, if your trailer has LED lights, that causes a fast blink inside your car, and it causes a light out or a lamp out light to come on. With those resistors being built in, it's going to cause your vehicle to think that your trailer has incandescent lights on it.

LED lights are becoming very, very popular. They last a lot longer, and a lot of customers are switching over to them. So having this handy in the event that maybe you usually haul an incandescent trailer, but then borrow a trailer that has LEDs, that's going to stop that fast flash or that lamp out signal coming through.As far as the installation process, it's going to be just like a normal seven pole. The tab here on top is going to go right behind the tab that's on our cover. So this slides in till it stops.

The top comes down. We always want to confirm that is in behind that tab on the cover. At that point, we're ready to pull again either our four or five-pole trailer. Just like that.Now, one thing I've noticed in messing with this, is that when we pull out our trailer connector, you see how that middle part wiggles just a little bit Now, this has a lot of good customer reviews. No customers have mentioned any issues with that or anything.

But you can see it moves in just a little bit, and it comes out just a little bit. Just wanted you to be aware of it, so you didn't think yours might be messed up or something when you get it.Now as far as if it would be something that I would own, I definitely like it. I think it is a good product, especially if you have one of those vehicles where that lighting system has that lamp out monitor. I think it's going to save you a lot of headache. It's going to work on any vehicle, even if it doesn't have that situation, but it's going to help in those events that it does. I like having all five poles there, so if you ever pull somebody's marine trailer or you already have a marine trailer, you're not going to have to worry about the lockout signal. Overall, it's good quality. It feels good. There's not a cover that comes with it to cover the poles, so when not in use. Some of the adapters are going to have covers that'll go over them, keep them protected. This one does not. So this isn't something that I would leave on the back of my vehicle. This would be something I would have in there when I needed it, I would take out when I didn't.One thing to help extend the life of it, dielectric grease is critically important. Some people use it, some people don't. The people that use it really see the benefit from it. Basically, by adding grease to our terminals on both sides, we prevent moisture from getting in there, which kind of absorbs dirt. Once we've got wet dirt sitting in there, corrosion is going to be an issue.Just like most adapters out there, to help resist corrosion further, all of our connectors are going to have a nickel coating on it. That's just going to help to alleviate any of that corrosion issue, at least much better than brass does. But again, dielectric grease is a really good option.


Customer Reviews

7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs - TR20141

Average Customer Rating:  4.9 out of 5 stars   (256 Customer Reviews)

Tow Ready 7-way connector to 5-way or 4-way flat connector is designed for use on vehicles with Trailer Lamp-Out sensors when towing a trailer equipped with LED lights.

- TR20141
by:

This product has worked perfectly. I was having problems with my trailer brakes not releasing when I put my MB GL450 in reverse. After searching the etrailer site I quickly learned that because my trailer had LED lights there was not enough resistance in the circuit to tell the care to engage the trailering function. Once I purchased this plug everything has worked flawlessly.


Comments
One year later everything still works great. Another great purchase from etrailer.
Don H - 07/25/2021


- TR20141
by:

Works exactly as advertised for our VW Touareg and trailer that now runs LED tails (which I happily bought from etrailer.com). Ignore the wiring diagram on the packaging as it's wrong. etrailer.com has much better wiring diagrams and pin-outs that can be used.


Comments
A year later and it still works perfectly! Cant go wrong with this unit.
Toby - 04/29/2015



- TR20141
by:

Before this device, my MB GL450 towed with hesitation, not at all like I was expecting. Plus I had running lights but NO 1. blinkers on back of trailer 2. no brake lights on back of trailer and of course, that means I was a highway hazard of the worst kind. This device plugged in gave me better towing as my GL 450 recognized there was a trailer behind it, full blinkers, full brake lights. I am thrilled to be driving safely for myself, my family, and those around me!



- TR20141
by:

From the start I have had issues with trailer lights on my Porsche Cayenne Turbo and whatever product I tried, it did not fix the problem. The plugs I ordered from www.Etrailer.com plugged right in and fixed the problem between the LED trailer lighting and my Porsche. I hear it is a common issue on German vehicles, so I highly recommend this product to anyone. I couldn't be happier with the product itself AND the customer service from the staff all the way from the order, to confirming delivery. Thanks again! Attached are a few pictures of the towing setup!



- TR20141
by:

Product works as advertised. It has been reliable over the past year. I would buy it again.


Comments
Great! Just like new.
Albert - 08/21/2021


- TR20141
by:

this was necessary to tow a LED light U-Haul trailer with my pre LED European SUV.



- TR20141
by:

Works great with my Mercedes and my LED trailer lights!



- TR20141
by:

Driving a '13 Escape, factory trailer tow package, pulling an Aluma tilt trailer w/ LED lights. When initiating signal light, it flashes rapidly w/ dash warning of trailer bulb failure + audible alarm. Also, stop/tail lights flash on/off as if hazard lights were on. I've researched several 'fixes' for a vehicle that is not programmed for pulling a trailer w/ LED lights: 1. connect in load resistors; 2. use wiring harness compatible w/ LED lights; 3. Ford has their own fix TSB-13-1-5 (which rewires the vehicle trailer tow package + adds different module. Not a good fix in my opinion). From etrailer.com, I've ordered p/n: 30717 (Adaptor 4 pole to 7 pole vehicle end trailer connector), AND p/n: TR20141 (7 way to 5 and 4 way trailer adaptor for VW, Audi, Porsche towing trailers w/ LED lights). P/N: 30717 does require you to connect the white wire (ground) to a ground point (frame or metal bracket) on the tow vehicle. I did this with a flat 2 way connector I purchased at the local hardware store (just join both wires, they're going to ground anyway). In conclusion, yes, there are two connectors back there to support, I've just used small/short bungee cords to hold the connectors to the receiver hitch & the trailer tongue. I've also used dielectric grease between the different connectors. All in all, the trailer lights now work as they should, no vehicle dash warnings, no problems! Thanks etrailer for your support. Finally happy towing.


Comments
Ive towed the trailer several times with the two connectors purchased from etrailer and the lights are working perfectly.
Keith G - 09/19/2015



- TR20141
by:

This solved the problem! I recently moved my license plate to a new location on the spare tire on the back door of my van. The new license plate spare tire mount included a white license plate running light as well as a new third brake light. Both were LEDs. I wanted to get things up and running quickly and figured rather than fishing around inside to find and tap into my wiring harnesses, because I have a trailer hitch I would go ahead and wire up a trailer wiring harness connector I had lying around. However, when I plugged it into my harness adapter at the hitch, nothing worked. Just faint flickering. Googled the problem with LEDs on trailers and came across this. Worked correctly out of the box!


Comments
Still working flawlessly after 1 year
Jeff - 10/30/2019



- TR20141
by:

This resolved my issues with my 2007 BMW X5 3.0si. My trailer LED lights had just been blinking whenever the 4-pin flat plug was plugged into the round BMW adapter. The brake and turn signal lights still worked, but when nothing else was going on, or even when the lights were turned off, all the trailer lights just flashed constantly. When I first plugged this in, the lights did the same thing. I unplugged it, reseated the 4-pin flat plug, then reseated the round adapter, and the trailer lights were still flashing. I turned on the car lights and tried the brake and signal lights. Trailer lights still flashing. I turned the headlights off, and the trailer lights went off! Brake lights and turn signals worked, and no flashing lights! Turned the headlights back on, clearance lights and tail lamps worked and no flashing! Brake lights and turn signals worked and no flashing! Cycled through everything a couple of times, and all was good - guess it just needed to get used to everything, but now it is working great! This $15 piece saved a $4,000 investment, so I'm quite happy! It also showed up a day faster than expected, which made it even better. Pat was a very big help getting it selected and getting it here faster!


Comments
Ive had no problems with the trailer wiring adapter at all since I first started using it. Its rock-solid performance has really made me a happy camper. I just wish Id known about the problem a week before I bought the trailer! Its a great produce!
Dr D - 04/23/2015



- TR20141
by:

work great on dry i forgot to unplug when i took the jetski in ocean and stop working but i got two so im good and happy



- TR20141
by:

This plug was purchased for my 2010 Porsche Cayenne S and works perfectly with my boat trailer that has LED lights. I originally had a more generic plug and the LED lights on the trailer seemed way too bright. I would also get a momentary warning about the lights system when starting the car. Now that I have this specific plug, I no longer get the warnings and the trailer lights operate at the proper intensity. Exactly what I needed for my set-up!


Comments
Your product has worked perfectly for me for the past year. I do not tow very often, but when I do, the connector provides exactly what I need to properly connect the LED lighting system and brake system on the trailer to my 2010 Porsche Cayenne S.
Mark A - 09/10/2014


- TR20141
by:

If you have a European SUV. Audi Porsche BMW Meecedes etc this will work like a charm. I bought a trailer with LED lights and when I connected it to my vehicle the trailer lights would not work. The would flash or not come on at all. It is because of the low current that LED lights produce. The vehicle sensors thing there is a light out and tries to locate it. This adapter bypasses the vehicle current sensor and allows the lights to function correctly. I tried shopping local but nobody had it. This was shipped fast and exactly what I needed. Thanks.


Comments
Working great. Still love it!!! Does the job
Richard H - 02/22/2016



- TR20141
by:

Great product! I got a new boat this year with LEDs on the trailer. I couldn't figure out why the trailer lights wouldn't work with my 2012 MB GL450. I even went to the MB dealer and the parts guy was unaware of the issue. This adapter also works with my other trailer with incandescent lights.


Comments
Works great. Thank you
SeaWags - 11/01/2016



- TR20141
by:

This product has solved all the LED trailer lighting issues. Without this unit trailer tail lights would blink rapidly due to bulb out sensors on the Euro vehicles..MB/BMW/Audi etc. The resistance of the onboard sensors is designed for resistance of incandescent bulbs , not LED. Unfortunately the dealers were completely useless & incompetent. They're not interested in learning how to solve or product support. This should be common knowledge among all automotive vendors. Some SUV actually tow trailers as they come equipped with hitches and trailer wiring- imagine that?



- TR20141
by:

Product arrived promptly and is exactly as described. On my 2009 Mercedes ML550 this is REQUIRED if you want to rent any trailers with LED lights at U-Haul. Beware the dimwits at U-Haul as they have NO CLUE what they are doing. eTrailer.Com has this priced at HALF what U-Haul charges, and they don't even know Mercedes cars need them!


Comments
PERFECT. I switched my glider trailer to LED lights, the U-Haul adapter doesnt work, this works perfectly! I even got the wiring right the first time, played Lotto, didnt win squat. :
Juan J - 06/24/2015



- TR20141
by:

nothing special about this adapter but always good quality from etrailer.



- TR20141
by:

I have a 2017 F350 that has trailer recognition and bought this product believing it would allow me to connect an LED tailgate light bar using one of the trailer connectors. Unfortunately it does not put enough of a load on the light circuit to allow the light bar to function properly. It seams my only option to make the light bar work correctly is to cut into the truck harness that feeds the truck lights.


Comments
The difficulty is being caused by Fords smart trailer connector. Your best bed would be to install a load resistor like # P230004A-2
Putco LED Light Bulb Load-Resistors - Aluminum - Qty 2
$34.74
on the inputs for the light bar.
-- Etrailer Expert Mike L - 02/20/2019


- TR20141
by:

This product is awesome !! Kept getting false trailer and lights warnings on my Ford trailer hitch light. This product solved all my problems ! Excellent !!!


Comments
Still working great !! Thanks !!!
Tom D - 08/21/2018



- TR20141
by:

You NEED this if you have a Mercedes SUV and plan to pull a trailer with LED lights. It will not work with a straight 7 to 4/5 adapter that does not have the load resistors. Mercedes (and many other makers) have made the vehicles way too smart for their own good. With a standard connector you will get all manner of alarms. Not will you get alarms for bulb failures on the trailer, but also since it uses the presence of a plug in the trailer connector to put the drive train into trailer mode, it will keep dithering between trailer and non trailer mode. This also means that you have to remove the adapter if you are not actively pulling a trailer. This is not a problem with the adapter, it is due to the software in the drive train controls.



- TR20141
by:

Solved the problem of a trailer with LEDs, being pulled by an SUV with bulb-out indicators. etrailer.com website most helpful in selecting correct product for this issue. Packing and shipping time excellent. This is a company that is most helpful, and cares!!


Comments
One Year Later and this adapter for trailers w/LEDs is working perfectly. Good Product, GREAT Company!
Gerald W - 02/08/2019



- TR20141
by:

Discovered my Jeep had the wrong chip for new LED trailer lights, so I had a purchase the right chip to get this adapter working. After that, worked and still works like a charm. Still using it today. Thumbs up!



- TR20141
by:

Called etrailer told them what I needed and said i thought a particular product would be right. They suggested another product as a better choice. I ordered what they suggested and it arrived sooner than promised. Hooked the trailer up using the adapter and everything worked great. Very satisfied. I highly recommend them.


Comments
Product works fine. No complaints
Craig I - 09/15/2015



- TR20141
by:

Simple solution to an annoying problems - my trailer had LED lights and the turn signals would blink ultra-fast; also, my tow vehicle - 2007 VW Touareg - would constantly tell me the trailer lights were not working properly. My trailer had a flat 4-pin connector and the vehicle had both flat-4 and round 7-pin connectors. I plugged the adapter into the vehicle and the trailer into the adapter and everything worked perfectly. The only alteration I had to make was a simple cut in my trailer's flat-4 connector so it would slide onto the adapter (the adapter is setup for either a 4-pin or 5-pin but the 4th pin on your 4-pin connector must be exposed to fit - a simple cut with a utility knife removed the end on the trailer connector).



- TR20141
by:

Works great didn't have to add another wiring harness


25
260
Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • LED Load Resistor for 2016 Land Rover LR4 Towing Trailer with LED Lights
    If your camper trailer has a 7-Way you need part # 20142 but if it has a 4-Way or 5-Way flat connector then use part # TR20141 instead. They both offer the same solution for your 2016 Land Rover LR4 it just depends on what you have on your trailer side.
    view full answer...
  • Will Tow Ready TR20141 Work on Foreign Vehicles Only
    According to my contact at Tow Ready, they have heard of the issue you describe and have received comments from customers experiencing the same problem who used a standard # 78118 adapter which worked fine. They haven't tested the # TR20141 so they didn't have any input on that. The # TR20141 will work on any vehicle that has bulb-out sensors which are featured on many European vehicles. The adapter uses an inline resistor that draws a bit more power which fools the bulb-out sensor.
    view full answer...
  • Will Tow Ready 7 to 5-way Adapter for German Cars and LED Trailers Support Reverse Light Circuit
    If you used the Tow Ready 7-Way to 5 or 4-way # TR20141 that you referenced with a trailer that has a 5-way then yes, the reverse light circuit will be active. If you used it with a 4-way then no it would not. That fifth circuit is for reverse lights. There would be no noticeable load or drain on the vehicles electrical system from the wiring of this adapter either. If you needed just a 7-way adapter that will work on the German cars that are sensitive to the LED trailer lights you...
    view full answer...
  • Troubleshooting LED Utility Trailer Lighting on a 2011 Mercedes-Benz GL450
    Good news, you are correct in that the Tow Ready # TR20141 adapter will fix your 2011 Mercedes-Benz GL450 to work with your LED trailer lights. Some makes of cars are more sensitive to the LEDs and this adapter contains a resister that's needed to accommodate that sensitivity. With the # TR20141 adapter it will end up taking you from a 7-way to a 4-way, but if your trailer is a 7-way plug I'd recommend the # C57003. The Curt adapter has the same resister but allows you to still have...
    view full answer...
  • One Side of Trailer Lights Not Working With TR20141
    Since one side of the trailer lights is working fine, it leads me to believe the issue is something other than the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141. If this were the issue (if the adapter were not working as intended), then it would reason that there would be faults on both sides with your vehicle. My best guess is that the issue is with the actual trailer wiring, or possibly the connector. Since you have a 2021...
    view full answer...
  • Using an Adapter to Tow a Trailer with LED Lights with a 2012 Mercedes GL450
    Yes. If your trailer with LED lights has a 5-Way or 4-Way flat connector then you would use adapter # TR20141. If the trailer has a 7-Way connector you would need # C57003. These adapters have load resistors in them that provide additional power draw so the vehicle thinks there are incandescent lights on the trailer. The other option is to install load resistors, # DI34ZR, in line on each circuit on the trailer wiring behind its connector. You can also use this method if the resistors...
    view full answer...
  • What are the Pin Out Functions of the 7-Way to 5-Way and 4-Way Adapter # TR20141
    The 5 functions that the 7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights # TR20141 utilizes are : Tail/Running Lights Left Turn/Stop Ground Right Turn/Stop Reverse Lights I have attached a picture of a Traditional 7-Way connector on the vehicle's end to demonstrate the pin locations.
    view full answer...
    Image 1 for
  • Wire Functions On LED Trailer Not Working Properly With 2004 VW Touareg V8
    I think a simple adapter may solve your problem. Since your trailer with LED lights has a 4-Way flat connector, you will need the 7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights # TR20141. This adapter has load resistors that provide additional power draw so the vehicle thinks there are incandescent lights on the trailer. If the adapter doesn't solve it, there is most likely a wiring issue. I've attached an article to help you troubleshoot,...
    view full answer...
  • Recommended 7-way/4-way Adapter For 2021 GMC Sierra 1500 To Recognize Trailer W/ LED Lights
    It is pretty common for new vehicles to have issues with registering that a trailer with LED lights is connected due to the power draw being so much less than the computer on your 2021 GMC Sierra 1500 is expecting to see. What you need is the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141 which has built in load resistors allowing your vehicle to recognize the trailer, and power the lights correctly. I included a video of...
    view full answer...
  • Trailer Running Lights Are Brighter Than Brake Lights When Vehicle Lights Are On
    The 7-Way to 5-Way/4-Way Trailer Adapter # TR20141 is the correct adapter for connecting your 4-way trailer connector to the 7-way connector on you 2014 Mercedes-Benz Sprinter as long as your trailer has LED Lights. Usually how you know you need the adapter to run your trailer with LED lights is because of a light out warning on your vehicle that keeps your lights from working correctly. From the description of the problem you are having, it sounds like there is an issue with the running...
    view full answer...
  • Trailer Wiring Adapter Recommendation for Audi Q7 Towing Trailer with LED Taillights
    German vehicles are notorious for not liking LED trailer taillights. Typically they won't work and a bulb out sensor will go off. We have two adapters for that. If your float has a 4-way connector the adapter you'd need is the part # TR20141 or if it's a 7-way part # 20142.
    view full answer...
  • Solution for Backup Sensor Alerts on a 2014 BMW X5 When Carrying a Bike Rack
    Yes it would, your 2014 BMW X5 will disable the backup alert system when it senses a trailer connected to the trailer wiring. So the load resistors in the 7-Way to 5-Way and 4-Way Trailer Adapter # TR20141 that you referenced would trick the vehicle into thinking a trailer is connected and and the sensors would not activate because of the brake controller. Another trick that people use with your vehicle is to tape over the sensors with masking tape.
    view full answer...
  • 7-way Recommendation for a Pre-Wired 2014 VW Tiguan R Towing Trailer with LED Lights
    First off, thank you very much for including the picture that you did. With that picture I know exactly what connector you would need. What you have is the industry standard plug that a standard 7-way would plug into. You would want the Replacement Multi-Tow 7-Way # 30955. The connector end of this would plug right into the connector of your picture and you would have a fully functional 4 and 7-way. Since your trailer has a LED lights and a 4-way you would want the 7-Way to 5-Way...
    view full answer...
    Image 1 for
  • Will 7-Way to 5- and 4-Way Adapter Work with Trailers with and without LED Tail Lights
    Yes, you can use the special 7-Way to 5- and 4-Way adapter # TR20141 on trailers with or without LED lights. The adapter was designed to work with Volkswagen, Audi, Porsche, and any other vehicles that are otherwise not compatible with a trailer with LED lights. On those vehicles there is not enough draw from the LED trailer lights and the vehicle thinks there is a bulb out and will produce a warning lamp. The adapter has load resistors inside that simulate additional load so that does...
    view full answer...
  • Trailer Connector Adapter fore 2010 Nissan Frontier
    Which trailer connector does the Frontier currently have, a 4-pole or a 7-way? Which connector does your trailer use? If you have the factory 4 pole on the truck and need to convert it to the 7-way, you can do so by installing part # 118267. If your trailer has electric brakes, and you'd like them to actuate you would need to install a brake controller like the Tekonsha Prodigy P2 part # 90885 and the brake controller wiring adapter, part # 3050-P which would plug in under the dash near...
    view full answer...
    Image 1 for
  • Load Resistors for LED-Light Trailer Towed by 2017 Audi Q7 with Factory 7-Way
    I cannot speak for Audi in terms of any progress they've made with the compatibility of their OEM wiring with LED-equipped trailers, but we do offer the Tow Ready adapter # TR20141 you referenced. This will carry your lighting and reverse lockout signals in the 5-pole format. If this does not work for you the other option is to wire in load resistors in front of each LED light on the trailer. Load resistors like # DI34ZR can mimic the electrical characteristics of standard power-hungry...
    view full answer...
  • LED Trailer Lights Flickering When Towed by 2015 Audi Q7
    Since Adapter # TR20141 did not work to stop the flickering of your trailer's LED lights, what you need to do is install Load Resistors # DI34ZR. You will need one load resistor for each affected circuit.
    view full answer...
  • Troubleshooting 2017 Ford F-250 Error Message for Trailer Lighting Module
    In order to help you troubleshoot this issue I need to ask you a few questions. On the trailer, do the turn signals operate properly, meaning do they flash at the expected rate? Were the LEDs installed recently as replacements or are they the original OEM lights? Has the trailer operated correctly until now or has it always had this issue? I ask these questions because the newer Fords have a fairly complicated trailer wiring setup and I have heard of this issue before. Sometimes...
    view full answer...
    Image 1 for
  • Trailer Wiring Adapter Recommendation for a 2011 Mercedes ML350 for Towing LED Trailer
    If you have a 7-way on your 2011 Mercedes ML350 and when you connect your trailer with LED lights you end up getting a bulb-out error code the 7-way adapter part # TR20141 will work for you. There are load resistors in this adapter that increase the amperage draw of the vehicle's trailer wiring so that the vehicle does not think it has a blown taillight bulb. If instead your trailer has a 7-way connector you would instead need the part # C57003. The # TR20141 will convert a 7-way...
    view full answer...
  • Troubleshooting LED Trailer Blinkers Towed by 2011 Mercedes GL450
    Since the running light circuit is the only taillight circuit not connected to a circuit that flashes it would lead me to believe that the problem is related to the lamp out issue that plagues European vehicles that are towing trailers with LED taillights. Using the part # TR20141 should fix the problem you are having. You can test the stop/turn signal circuits of your 7-way with a circuit tester like part # PTW2993 to verify that there isn't an issue on your vehicle's wiring first....
    view full answer...
  • Left Side Trailer Lights Not Working But All Other Lights are Fine
    On a 7-Way trailer connector usually the wire functions are green for running lights, black for 12 volt power, yellow for reverse lights, brown for right turn/brake lights, red for left turn/brake lights, blue for electric trailer brakes, and white is ground. With that said it is best to test the connector using a circuit tester such as # 40376 while someone sits in the truck and runs through the lighting functions. On the trailer, the 4-Way will have the one covered pin as the ground....
    view full answer...
  • Will the Tow Ready 7-Way Adapter TR20141 Fit a 2011 Mercedes GL 350
    If your 2011 Mercedes Benz GL 350 has a 7-way trailer connector on it yes, the part # TR20141 will fit it and work well to provide you with a 4 or 5-way.
    view full answer...
  • Wiring Adapter For 7-Way connector On 2009 Mercedes Benz And 4-Way Connector On Trailer
    For your 2009 Mercedes Benz ML the adapter I recommend is the Tow Ready 7-Way to 5-Way and 4-Way Trailer Adapter, part # TR20141. This adapter is designed for vehicles with LED lights. This will allow you to be able to power the lights on your trailer without having to replace the 7-way connector on your vehicle. In the future if you need to tow a trailer with a 7-way connector, you can simply remove this adapter and you are ready to go.
    view full answer...
    Image 1 for
  • Solution for Land Rover LR4 that won't Recognize Trailer with LED Taillights
    We have a similar product as the one you referenced, part # TR20141. This product works on most German vehicles that have a hard time detecting trailers with LED taillights. I would normally recommend this for a situation like yours. But we have had feedback with other Land Rover owners who have reported that this product did not work with their trailer with LED taillights. The best recommendation I could make for you would be to replace the LED taillights of your trailer with incandescent...
    view full answer...
  • Troubleshooting Trailer LED Lights Not Working When Hooked Up to a 2012 Mercedes-Benz GL450
    The LED bulbs on your trailer draw very little power and the Lamp-Out sensor in your 2012 Mercedes-Benz GL450 sees this as a bulb that is about to go out. To solve this problem the # TR20141 adapter has resistors to simulate more power draw which usually works. The other solution is to install load resistors like # DI34ZR on the lighting circuits. Since the adpater didn't solve your problem you'll need to install the resistors.
    view full answer...
  • Will 7-Way to 5-and 4-Way Trailer Adapter TR20141 Fix Flashing Trailer Lights, 2010 Mercedes GL450
    If the trailer has LED lights and you are having issues with them not working then you would need to use adapter # TR20141. To plug in a 4-Way, you would just not use the last opening on the adapter. That would be for a 5-Way flat (it works with both 4-Way and 5-Way flat connectors). In the event that the 4-Way on the trailer is not conducive to this design because of a rubber or plastic covering, you may have to trim it or replace the 4-Way end with a compatible one like # 18004.
    view full answer...
  • LED Light Bar and Hitch Light Cause Error Warnings and Disable Backup Features on 2015 Ford F-150
    The issue might be that the LED lights do not draw enough power and it is confusing the computer on your 2015 Ford F-150. If you accessories plug into a 4-Way then you could use adapter # TR20141 which has built in load resistors to add more load to the system so it won't confuse the computer. If they plug into a 7-Way we have a similar adapter, # C57003. There may be other ways to disable those alerts or to have manual control over them but you may need to check with a Ford technician...
    view full answer...
  • 7-Way to 5-Way Trailer Wiring Adapter Recommendation for Porsche Cayenne
    German vehicles like your Porsche don't like trailers with LED tail lights. It causes a tail light bulb sensor to pop up on the dash when connected to them. That is why the part # TR20141 was created. This adapter has diodes in it that allow the trailers with LEDs to be towed without any issues. This adapter can be used on trailers with incandescent bulbs as well too. The part # A75TB is the same adapter but without the diodes.
    view full answer...
  • 2011 Range Rover with Trailer Assist Does Not Recognize Trailer with LED Tail Lights
    First an adapter with load resistors that goes from a 4-Way flat to a 4-Way flat is not available. You would need to use the 7-Way to 4-Way adapter, # TR20141 for that. This particular adapter was designed to offer enough resistance when towing a trailer with LED lights so you no longer get those errors. The other option is to install load resistors, like # DI34ZR for a 2-pack, in line on the trailer wiring for each circuit.
    view full answer...
  • Wiring Adapter for Land Rover to Allow Proper Operation of LED Trailer Lights
    We do offer wiring adapters for import vehicles to help them properly operate the LED lights on a trailer. If both the vehicle and trailer have a 7-way RV style connector then you can use part # C57003 from Curt. If the trailer has a 4-pole flat connector then instead you'll use # TR20141 which provides that connection. Both of these require a 7-way socket on the vehicle, like the one shown in the linked photo.
    view full answer...
    Image 1 for

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:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

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.