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 Wiring Adapters - TR20141
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  • 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. 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.


  • All Info
  • Reviews (178)
  • Q & A (158)
  • Videos (2)
  • Photos
  • Why etrailer?

Tow Ready Wiring - TR20141

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 Wiring - Wiring Adapters - TR20141 Review

Today we're going to review part number TR20141. This is the Tow Ready 7 way to 4 way and 5 way adapter LED lamp out bypass adapter for the Audi, Volkswagen, Mercedes, and Porsche. This adapter was designed to work with the Volkswagen, Audi, Mercedes, and Porsche vehicles and any other vehicles that otherwise not compatible when towing a trailer with LED lights. Basically on those vehicles, there's not enough draw from the LED lights on the trailer and the vehicle thinks there's a bulb out and will produce a warning lamp. This adapter actually has load resisters on the inside and that will simulate additional loads so that it does not happen and the lights will work on your trailer. This adapter will plug into your factor 7 way on your tow vehicle and allow you to plug in back here either a 4 way or a 5 way connector on a trailer. You'll notice there is 5 plugs and the 4 way, you just eliminate that end one. You always use the ground one, so when you plug in the 4 way you'll just not be using that end plug right there. That should do it for the review on part number TR20141.

The Tow Ready 7 way to 4 and 5 way adapter LED lamp out bypass adapter for the Audi, Volkswagen, Mercedes, and Porsche vehicles. .


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:  4.8 out of 5 stars   (178 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:

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:

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:

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:

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:

On my Touareg (2004 model) with a trailer with LED lights hooked up, I would get "CHECK LIGHTS" flashing on the dash and an annoying DING! from the dash every 15 seconds. That's enough to drive you mad! A Cayenne or Audi Q7 would do the same, fyi. After researching online, this seemed to be the adapter I needed to add the right resistance to prevent the warning from appearing, and it worked! No more warning, no more annoying chime. And the price was great too. Thumbs up! 115646



- 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:

Just what I needed! 479535



- TR20141
by:

The adapter I ordered was exactly what I needed. The best part was the customer service from etrailer.com. You don't see the kind of attention placed on big orders from other suppliers as was placed on this single adapter. Very satisfied and will tell anyone looking for a great supplier this is the place. 115825



- 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:

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



- 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. 175517


Comments

Working great. Still love it!!! Does the job

Richard H - 02/22/2016

16865

- 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:

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:

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:

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. 152198


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

15096

- 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:

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. 127608


Comments

A year later and it still works perfectly! Cant go wrong with this unit.

Toby - 04/29/2015

11233

- TR20141
by:

I called and asked if this would work for an '06 Range Rover Sport SC. "Oh, sure." was the response. First of all it doesn't even fit through the opening in the bumper. However I was so desperate for a solution to the "flashing" problem, I partially removed the bumper cover so I could insert the plug. Sadly.......It doesn't stop the "flashing". In other words......It Don't Work!!! 99913



- TR20141
by:

Excellent solution to my problem. Have RV with MB 3500 chassis. I needed to obtain power for an LED lighted license plate holder I added via an attachment to the rear ladder of RV when carrying bikes and bike cover which hid the normal license plate location. I wanted to use the normal trailer hitch plug for the power source. However, it only registered 1 or 2 volts D/C. This adapter fooled the MB electrical system into thinking a trailer was attached which allowed the MB electrical system to release full 12-13 volt power to the trailer hitch plug. Also, the LED lights didn't flicker and they go on and off as I turn the MB lights on and off at the front dashboard. Very cool! Needed to also purchase the four plug adapter to plug into the back of this adapter and then the four plug adapter is wired to the LED license plate holder. 466391



- 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



- 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! 98630


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

6772

- 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! 126557


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

11047

- 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:

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! 102018



- 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:

A year ago I purchased this adapter to connect a 2006 Mercedes Benz ML 350 to a small tag along trailer that I had recently upgraded by replacing the original trailer light bulbs with LED trailer lights. When I connected the new LED trailer lights to the vehicle, the lights would not illuminate properly. After checking my wiring and doing some research, I discovered that this Mercedes had problems detecting the low current associated with the LED bulbs, essentially causing the vehicle to "think" that bulbs were not illuminating properly. I purchased this adapter from etrailer and the vehicle lights and the LED trailer lights have functioned perfectly ever since. I wish all fixes were this easy! 253742



- 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:

Ordering online through etrailers was way easier than trying to explain what I needed at Napa and Advanced Auto Parts. Thank you etrailers for being efficient and easy. 664248



- TR20141
by:

Great quality and fit! 660033



- TR20141
by:

Works great and as expected. 659953



- TR20141
by:

Works great! 659952



- TR20141
by:

Works well on my ML350 with trailer and LED lights. 652987



- TR20141
by:

Works on Range Rover sport LED Trailer Lights 651441



- 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:

Solved the issue when pulling a trailer with LED lights. No more flashing, and the trailer is now also seen as part of the SUV and the alarm sounds if someone disconnects it. 651258



- TR20141
by:

Just what I needed. Thanks! 649574



- TR20141
by:

Great adapter 649337



- TR20141
by:

Performing well. Happy with my purchase. 649263



- TR20141
by:

Good product, accommodates multiple working setups. Really needs a prong protector, but just need to install with care. Works well. Thx!! 642493



- TR20141
by:

I have found that the etrailer staff and their merchandise to be the best available. I have purchased on several different occasions, and could not be happier with each purchase. This particular connector is used on a Mercedes G wagon and connected to a trailer with led lights. The challenge to the connection was to make sure the vehicle trouble lights on the dash did not light up from the connection. This is a common problem and Mercedes dealerships could not figure it out, but etrailer staff directed me to this connector that is made for that situation and I could not be happier with the results. Thank you for the service and your knowledge on what you sell. 612011



- 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. 606404


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
$30.51
on the inputs for the light bar.

-- Mike L - 02/20/2019

49705

- TR20141
by:

Very good quality and versital. The price was less than any other source I looked at for an identical product. 605307



- TR20141
by:

Well made, well designed. 604024



- TR20141
by:

I bought a Marlon sled deck for my 2018 Ford F-350. The LED lights on the sled deck set off all kinds of messages on my dash. Marlon had a fix that included splicing into my trucks wiring, and jump wires....needless to say I was a little leery of doing this! This adapter saved me from having to rip apart my new truck. Highly recommended! 602902



- TR20141
by:

Works great. Needed it when I installed LED rear lights to my teardrop camper. 599009



- TR20141
by:

It does the job.... but, Carla made the difference. She took the order, followed up, and may sure it was delivered 595729



- TR20141
by:

Perfectly good product. Super customer service. Quick turnaround. Very satisfied! 594041



- TR20141
by:

For the first time in my life I bought something fancy (Mercedes Benz). To my surprise my Benz is too smart for its own good, and trips all sorts of “lamp out” warnings because the LED trailer lights don’t draw enough voltage. This adapter did the trick and cleared my lamp out warning and let’s me tie my trailer without constant dash warnings. 589668



- TR20141
by:

It worked really well when towing a trailer with LED lights with be X5. Without it, you may get an error that trailer lights are malfunctioning, despite the fact that they work. 586542


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Ask the Experts about this Tow Ready Wiring
Do you have a question about this Wiring?


  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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...
    view full answer...

  • 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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  • Trailer LED Light Load Resistors for Wiring Harness in 2014 Ford Escape
  • If the factory trailer wiring harness in your 2014 Ford Escape does not function correctly with the LED lights on your trailer you can correct this issue by installing load resistors at each of the trailer lights. You do not need to replace the factory harness unless it has damage. Usually factory converter harnesses will be installed under dash. High-efficiency LED lights can have this issue because they draw so little power. That can cause the converter to not sense them correctly. The...
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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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  • 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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  • 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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  • 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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  • 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.
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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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  • Adapter Recommendation for German Vehicle Towing Trailer with LED Lights
  • 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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  • 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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  • 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...
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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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  • Can 7-Way to 5-Way Adapter part # TR20141 Activate Reverse Lock Out of Surge Brakes
  • As long as the 7-way installed on your 2006 Toyota 4Runner has the reverse light function active yes, the 7-Way to 5-Way Adapter part # TR20141 that you referenced would work well to activate the reverse lockout on your trailer.
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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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  • 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...
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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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  • 7-Way to 4-Way Trailer Wiring Recommendation for German Vehicle Towing Trailer with LED Taillights
  • We have just what you'll need. The 7-Way to 4-Way adapter part # TR20141 has diodes installed in it that prevents the LED taillight issue that you mentioned which is common for German vehicles.
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  • Adapter for 2010 Mercedes-Benz GL450 Towing Trailer With LED Lighting to Avoid False Short Indicator
  • The answer is that you are needing the TowReady # TR20141. This adapter is used because LED's draw such low power that a lot of times on German vehicles your lamp out indicator will illuminate giving you the impression that you have an issue, when in reality you do not. With this adapter you will be able to tow your trailer with your 2010 MB GL450 without a problem. The adapter has built in load resistors that create more draw so the sensors think everything is working normally. If...
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  • Compatibility of 7-way to 5 or 4-way Trailer Connector with Integrated Resistors for Boat Trailer
  • The 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # TR20141 will work with your 2008 Chevy Avalanche. This adapter has load resistors to correct any lamp out errors from LED lights not pulling enough power to let the system know that incandescent bulbs are not burned out.
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  • 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,...
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  • 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.
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  • 7-Way to 5-Way Flat Adapter for a 2010 Chevy Avalanche Z71
  • If your 2010 Chevy Avalanche has a 7-Way trailer connector then you can use adapter # TR20141. But this adapter has built-in load resistors designed to combat the bulb out sensor problem that some vehicles have when towing trailers with LED lights. For a regular 7- to 5-Way adapter use # A75TB.
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Info for this part was:

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

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