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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

Item # TR20141
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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 800-298-8924 for expert service.
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  • Reviews (199)
  • Q & A (167)
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Tow Ready Wiring - TR20141

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






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   (199 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:

After 1 year, still works great! 721000



- TR20141
by:

Product solve a problem for me. Adapting a 7 pole to a flat 4 pole on a Mercedes GLE 350. Works very well so far. I had a real problem until I did research with etrailer and found out why my adapter from a Chevy Tahoe would not work. Thanks etrailer! 711071



- TR20141
by:

Works great and as expected. 659953



- TR20141
by:

Benz GL450 I was having problems with lights flashing and car not recognizing was trailering. This adapter did the job perfectly as advertised and was delivered quickly. 691876



- TR20141
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Kyle S in Customer Service chased down the issue I was having with hyperflash on my BMW X5 and identified the correct fix to get the problem resolved. I purchased and installed the TR20141 adapter and POOF, the problem went away. I spent countless hours on the phone with numerous trailer repair service providers located in my vicinity and when I told them about the problem they all ran away from me as fast as they could. Kyle S nailed it, product works like a charm. Thanks Kyle S! 697336



- TR20141
by:

This is an amazing product. I purchased a new aluminum trailer and thought everything would be fine. LED lights, all the bells and whistles. I have a 2011 GL450 Mercedes SUV with a factory towing package Twin turbos and I thought I was set. When I picked up the trailer I found that not one light on the new trailer worked properly. I checked out the plug with a tester and the trailer light and the readings all looked good. They just would not work together. We goggled the problem and etrailers sight came up and had posts of others having similar problems. This new converter that etrailers sells is amazing. No problems now! 681308



- 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! 678355



- TR20141
by:

Awesome plugged it in to my 2012 gl450 and everything worked. Fast and easy thanks 674723



- TR20141
by:

It wasn't the right connector so I really don't have a review of how the product was, but it got to me in a few days so the service was great. 651316



- TR20141
by:

Plug worked as advertised without any issues. This saved me money over buying one from the dealer. 480416



- 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. 230668


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

21702

- TR20141
by:

I have a Mercedes Benz ml 350 i bought a new trailer and it has led lights on it they blinked fiercely added new part tr20141 fixed problem thank you nobody could figure it out nobody 671573



- 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!! 473818


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

49298

- 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! 137343


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

12750

- TR20141
by:

I have a 2012 Mercedes GL550. Using the standard 7/4 adapter the trailer lights would flash, cancel the blind spot sensors and trip the bulb monitor. After researching this the problem lies all over the place and not with one model either. The blind spot mirror issue is in the owners manual but not trailering section. Using this adapter it stops the flashing trailer lights but the trailer lamp out persists on the dash. This problem is inherent to many late model German automobiles on a hit and miss basis. VW, BMW, Mercedes and Porsche. On my 2011 GL450 this problem was not present, but on my 2012 GL550 it is. Mercedes was on no help at least my servicing dealer was of no help. The selling dealer said he knew of the problem but recommended a trailer shop for further help. The trailer shop says it's the vehicle and not the trailer as they sell to these customers all the time. I've not seen too many of these buyers pulling trailers! They suggested installing resistors in the trailer wiring. I'm not inclined to doing so. The trailer works great on my other two vehicles. The Benz is what the problem is! But like everything in Benz fashion. I'll be dead and gone before they even care there's a problem! 214690



- TR20141
by:

Outstanding Product! Well made. 436868


Comments
No issues with Adaptor. The only issue is with the Mercedes GL550 monitoring system still at times shows a left turn signal out when connected to the LED trailer lights. When disconnected, the light goes off. Read on other forums that this happens with this particular vehicle. As far as the trailer lights working when connected, they do work fine.
Philip C - 09/27/2018

44078

- 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. 248056



- TR20141
by:

I have a Mercedes G-Wagon with a factory trailer connection and was having a problem getting trailer lighting to work. After having it in to the Mercedes dealer two times, I decided to try to research the problem myself. Your description and information on European vehicles needing to be converted to 4 or 5 prong and not producing an adverse computer problem on my vehicle was absolutely perfect. I ordered one of the connectors, and it fixed the problem completely. I am more than pleased that you provided such good information and then great service and followup after the sale. 583499



- TR20141
by:

Wast of money, stops blinking temporarily, until your fuses blow......does not solve led problem when hooked up to range rover, bo 37238


Comments
I have a 2001 BMW E53 X5 with the factory tow package. It has a 7 blade round connecotr, however my tailer for the jetski and jet boat both have the 4 flat connector. None of the trailers have LED at the moment and I doubt that I will ever convert them to LED. I need an adapter connector so that I can connect the trailer lights to the BMW connector.
-- comment by: Don M - 05/19/2013

1519

Something like PK12716 should fit the bill just fine.

-- Patrick B - 5/20/2013


- TR20141
by:

I purchased this adapter after finding that the lights on a rental trailer would not work using a standard adapter with my 2010 Mercedes GL. A bit of research seemed to indicate that the vehicle computer was not not compatible with LED lights on the trailer. On a recent trailer rental, the lights worked perfectly with our first attempt using the new adapter. I am very happy with the service from etrailer, and with the performance of their product. 558372



- 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. 151189


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

14992

- 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 !!! 422779


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

42589

- 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). 183251



- TR20141
by:

I give the product an A++ and I give etrailer.com A++. Great product from a great company. I am not the owner's cousin or a friend of someone who works there - I am a very satisfied customer. When I need to purchase something, I want to purchase with confidence. etrailer, you are awesome and I feel so good about my experience, I feel like it's my duty to let others know. Here's the final version of my story (you can get my full inquiry and answered question here https://www.etrailer.com/question-322654.html): I put LED tail lights on my 14' Lund Adventure fishing boat trailer. The old incandescent lights burned out when they get wet - not a good feature on a boat trailer that needs to be backed into water to launch the boat... I decided that waterproof sealed LED lights were the best option because the bulbs won't get wet (duh), are brighter than incandescent bulbs, and will last for a long time which means less time messing with trailer lights and more time taking the kids fishing. Here's the rub: LED lights don't draw enough power from my 2011 Mercedes Benz GL350 electrical system for the SUV to even recognize that a trailer is plugged in. The Mercedes needs to detect a load on the electrical system in order for it to send adequate power to the trailer. LED lights simply don't draw enough juice for it to work. When I initially plugged in the LED lights, they lit up - but just barely. The brake lights and turn indicators didn't work. The running lights seemed to work but they were very dim. After figuring out what was going on, I determined that the LED lights were operating on the test current running through the system (testing for bulb faults as a safety feature on the vehicle) but didn't draw enough for the car to detect the trailer. I sent a message to etrailer.com and got a terrific response. To verify what was going on, an electronic wizard friend came over with his test gear and tested the system and everything looked like it was working - yet it still didn't work. He connected up a 25W resistor in the system at the trailer harness (he could have put it anywhere in the system) and it fooled the SUV into thinking that an incandescent bulb (higher wattage than LEDs) was drawing on the system. Everything worked - but I didn't want to have a resistor duct taped to the top of the trailer. I ended up adding a new ground wire to each rear LED light because I knew that if I didn't deal with the issue now, I would be dealing with it later because the only thing keeping the lights grounded were thin strands of 22 gauge wire bolted to the trailer frame. Adding a ground wire individually to each tail light took 15 minutes and was well worth the extra work because now everything meaningful was sealed and was less likely to rot after repeated trips to the salt water to fish. I ordered the TR20141 and received it in 6 days (sent UPS Ground). This 7-pin to 4/5-pin adapter (I only use 4 of the 5 pins) has built in resistors to fool my SUV into thinking incandescent lighting is connected thus drawing enough power to allow my Merc to detect the trailer. I removed my old resistor, reconnected the wiring as it was before (now with my extra 2 ground wires), plugged in the TR20141 and P R E S T O - it works awesome!! It was an inexpensive solution and works perfectly. As a side note, etrailer.com does sell the waterproof resistors that you can hook up in line in the wiring harness but I prefer an integrated solution rather than a resistor dongle hanging off the wiring harness or mounted to the trailer. I like KISS solutions (keep it simple, stupid). Thank you everyone at etrailer!! I look forward to purchasing more from you because you give me confidence in your products, your company, and in mankind. Okay, maybe notsomuch with mankind as a whole :-). 574819



- TR20141
by:

I purchased this product because I have trouble plugging my flat connector into my expedition every time I want to hook up. A process that should take 10 seconds sometimes takes over 5 minutes and requires channel locks. I ordered it and it showed up as expected. Today I plugged my trailer's flat connector into this product and then plugged this product into my expedition in 5 seconds. It fits perfectly and functions perfectly. I will never remove this from my trailer. It makes hooking up a breeze. I love it!! 570805


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Ask the Experts about this Tow Ready Wiring

  • Adapter Recommendation for Mercedes Trailer Wiring to Operate Trailer with LED Lights
    We have just what you need. For a 7-way adapter designed for German vehicles towing LED lighted trailer to prevent the bulb out error message we have the part # C57003. For an adapter that plugs into a 7-way and then provides a 4-way we have the part # TR20141.
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  • 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.
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  • LED Trailer Hitch Cover Sending Turn Signal Light Bulb Is Out Message On 2016 Ford F-150 Lariat
    On your 2016 Ford F-150 Lariat, the problem you are referencing with your Brake and Tail Light L.E.D. Trailer Hitch Cover # CR-017F is only seen on certain vehicles. We normally see this issue with German vehicles when they try to tow a trailer with LED lights. The issue is that the lower amperage draw of the LED lights is just enough to confuse the vehicle that it is drawing too much and because of that it wants to tell you that you have a bulb out on your vehicle, then with no amperage...
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  • 2019 Ford Ranger LED Tailgate Light Causes Trailer Light Out Error Code and Disables Backup Camera
    I have a solution for you but the T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 22124 will not work since it connects to the same tow package port your existing factory 7 and 4-way connector plugs into. When you plug in a tailgate bar, like # BLS-1103 (or any accessory that uses lights) into your factory wiring, it tells your vehicle that there is a trailer connected, which is why it disables the backup camera lines, as you mentioned. Otherwise, the sensors would constantly...
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  • 7-Way to 4-Way Adapter for a 2017 Volkswagen Tiguan
    As far as using the Adapter 7 Pole to 4 Pole # 47345 as an adapter then you would not have a problem using it with your 2017 Volkswagen Tiguan unless the trailer has LED lights. Because LED lights use such little power it can cause a bulb out error to appear and the lights on the trailer may not work. You would instead use adapter # TR20141 to avoid that issue. If you have adapter # 47345 plugged in without a trailer then it is possible the LED indicators on it will not work for the...
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  • Load Resistors for 2018 Toyota Tundra and 2010 Airstream with LED Lights to Remove Error
    The Putco load resistors # P230004A-2 put out 6 ohms resistance each and you most definitely can install them yourself. I've attached a photo of the correct installation method to assist. They will get warm to the touch but you can absolutely install them on the inside of your RV where the wires come in from the tow vehicle. I wouldn't put anything right up against the fins as that would further reduce cooling and increase heat, but you won't have any issue in the location stated. The...
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  • Available Lengths of 4-Pole Trailer Wiring Extensions
    We do offer 4-pole extensions that can be used with the Tow Ready 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141. We have 4-pole extensions in many lengths including the 10-foot # HM48235, 4-foot # HM47115 and # HM47114, and 2-foot # HM47004.
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  • Solution for LED Boat Trailer Lights Hyperflashing With 2008 BMW X5
    You are correct that you should not submerge load resistors such as the Optronics Load Resistor for LED Lights # ALEDRST2B you mentioned but there are a couple of solutions that won't require you to switch from LED to incandescent. The first would be if your 2008 BMW X5 has a 7-way; if so you can use the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141 or Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way...
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  • Fix Potential Hyper Flashing On 2017 Land Rover Discovery
    I understand your concern that some newer vehicles have to recognize that a trailer is plugged into the connector in order for the towing functions to activate. When a trailer has LED lights the power draw is very low, but that's one advantage of LED lights. However since the power draw is so low the vehicle doesn't recognize the trailer and therefore doesn't turn on the towing features. Another cause could be that the 2017 Land Rover Discovery recognizes the lights being on the circuit...
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  • Trailer Wiring Connection Needed for 2006 Lexus GX 470 with Connection Under Bumper
    Thank you for the picture! It actually looks like you already have a 7-Way socket installed on your 2006 Lexus GX 470. If you check out the attached photo of the Hopkins Endurance Multi-Tow Twist-Mount 7-Way RV and 4-Way Flat Trailer Connector # HM40920 you can see how they are similar. My guess is that someone install the 7-Way at a weird angle either to try keeping your Lexus looking factory or because they didn't have a choice. You'll want to verify that the various functions work...
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  • Audi 2018 SQ5 LED Trailer Lights Adapter Recommendation
    We have what you are referring to. For a 7-way to 7-way adapter you'd want the part # C57003 or to go from a 7-way to a 4-way you'd want the part # TR20141. Both of these have the needed resistors in them so that your trailer with LED taillights won't give your Audi issues. This is a well-known problem with the Audi vehicles and this type of adapter is what is required to fix it.
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  • 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.
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  • 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 # P230004A or # P230004A-2 for a quantity of two. You will need one load resistor for each affected circuit.
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  • Replacement for Pollok PA66-MD40 on 2012 MB Sprinter Pleasure-Way
    If you already have the Pollak PA66-MD40 you referenced, then the # PK11893-11933 is the correct replacement part. If you meant you also have a 6-way square plug on the trailer and the 7-way on your vehicle, I recommend the 7-way to 4-way adapter like # TR20141 and then using the Adapter 4 Way Flat to 6 Way Square for Jayco # 30104.
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  • Will Using Brake and Tail Light L.E.D. Trailer Hitch Cover # CR-017F Cause Issues w 2018 Ford F-150
    If you install the Brake and Tail Light L.E.D. Trailer Hitch Cover # CR-017F on your 2018 Ford F-150 the truck is going to think that a trailer is connected and will turn off backup assist sensors and you'll get a bulb out error code. Reason being this uses trailer wiring to activate and when your truck senses wiring of a trailer the sensors turn off. Since this draws such a small amount of amperage the truck also thinks a taillight bulb is malfunctioning. I wish there was an easy work...
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  • Towing Trailers with 4-Way Flat and 5-Way Flat Trailer Connectors with a 2014 Honda Pilot
    The best way to be able to tow both the 4-Way and 5-Way trailers with your 2014 Honda Pilot is to use the 7-Way harness # 118265 and then use an adapter, # TR20141. Normally a 5-Way trailer connector can plug into a 4-Way vehicle side connector but you will lose that one function. Usually the 5th function is for a reverse electric lockout on a trailer that has surge brakes. Without that function you would not be able to back up the trailer without the brakes engaging. It is possible...
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  • 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...
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  • Troubleshooting Trailer Wiring 2011 Mercedes GL350 Converted to LED No Brake Lights
    Since we aren't totally sure if the issue you have is due to your vehicle not wanting to work with LED lights or if it's due to the trailer wiring having a problem let's first determine which issue is at fault. Using a 12 volt jumper wire from a source like a vehicle battery's positive post try jumping the voltage to each of the stop/turn circuits to see if you can get the brighter illumination to come on. If so then the problem is that your Mercedes doesn't like the LED Lights and you'd...
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  • Will Tow Ready Wiring Adapter # TR20141 Work With Trailers Using LED or Incandescent Lighting
    The Tow Ready Trailer Wiring Adapter, part # TR20141, you have referenced will work with both incandescent or LED lights on a trailer. This adapter is designed to be used on vehicles with incandescent lights towing a trailer with LED lights. The Lamp Out Warning Module on your BMW X3 is a feature that lets you know of a bulb that is burned out on your vehicle. It also passes through the trailer wiring. When towing with a trailer that has LED lights, which require less power then incandescent...
    view full answer...
  • Options for Preventing Bulb Out Sensor on Vehicle When Towing Trailer with LED Lights
    The only vehicles where LED trailer lights becomes an issue are German vehicles. Your 1997 Ford F-350 would not have any problems at all. For those vehicles we have the part # TR20141 which plugs into a 7-way and provides a 4-way for the trailer or part # C57003 which has a 7-way for the trailer and for the tow vehicle. Your other option is to install load resistors like part # P230004A on the turn signal/stop circuits and on the running light circuit.
    view full answer...
  • LED Trailer Tail Lights Will Not Work when Connected to a 2009 Mercedes GL550 with Factory 7-Way
    There is an issue with German vehicles (Audi, Mercedes, Porsche, BMW, Volkswagen, and so on) and trailers with LED lights. The LED trailer lights do not offer enough draw on the system for the lights to work. On a lot of these vehicles you will also get a bulb-out warning in the vehicle. The solution is to use an adapter that has load resistors in it, # TR20141, to provide enough draw so the lights will work and so you will not get that bulb-out warning. The adapter will go from a 7-Way...
    view full answer...
  • Solution for Newer Ford with Bulb Out Error Message When Using LED Hitch Cover
    This is a problem we normally see with German vehicles when they try to tow a trailer with LED lights. The issue is that the lower amperage draw of the LED lights is just enough to confuse the vehicle that it is drawing too much and because of that it wants to tell you that you have a bulb out on your vehicle. Normally the fix for this is to use the # TR20141 which has diodes in it that increase the amperage draw to what an incandescent bulb would draw on a trailer which eliminates the...
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  • 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...
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  • 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, # P230004A, in line on each circuit on the trailer wiring behind its connector. You can also use this method if the resistors...
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  • How To Use LED Lights For Towing A Trailer With A 2006 Volkswagen Touareg
    In order to install a 7-way harness on your 2006 Volkswagen Touareg, you will need a trailer light wiring harness such as the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118509 in addition to our 7-Way RV and 4-Way Flat Adapter part # ETBC7. The T-One harness is a direct plug and play option for your vehicle in addition to having LED capabilities. If you already have a 7-way installed on your vehicle and are receiving an error message while towing a trailer...
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  • 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.
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  • Trailer Lights Not Working Using 4- to 7-Way Adapter on a 2012 Mercedes GL450
    If the trailer has LED lights then the issue isn't the adapter or the trailer. It is the vehicle. The 2012 Mercedes GL450 and other German vehicles do not work well with trailers that have LED lights. This is because LED lights do not draw enough power for the tow package on the vehicle to recognize them. Usually this is accompanied by a bulb out sensor light in the vehicle. The fix is to use a special adapter such as # TR20141. Or, if this is the adapter you are using then adding load...
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  • Wiring Adapter For 2009 Porsche Cayenne With 7-Way Connector Towing Trailer With 4-Pole Connector
    If the trailer you are planning on towing has LED lights, the adapter you can use is part # TR20141. This adapter is needed because you have a bulb-out sensor on your Cayenne. When you use a trailer with LEDs, they draw so little power and cause the Cayenne to think a bulb is burned out. If the trailer has incandescent bulbs you can use a 7-way to 4-way connector like part # PK12716. I have attached links to product review videos for these adapters you can check out.
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Info for this part was:

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

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