7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
(72 reviews)
Price: $21.47
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7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
Item # C35FR
Retail:$41.19
Our Price: $21.47
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In Stock
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- Reviews (72)
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- Videos (2)
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CURT Trailer Wiring - C35FR
- Wiring Adapters
- Multi-Function Adapter
- 5 Flat
- 4 Flat
- Plug Only
- 7 Round - Blade
- CURT
Curt 7-way connector to 4-way or 5-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 4-pole and 5-pole flat trailer connectors
- Designed for use on vehicles with Trailer Lamp-Out sensors - such as Audi, Mercedes-Benz, Porsche, and Volkswagen vehicles with the factory tow package
- Plugs into a 7-way connector on the vehicle and 4-way or 5-way flat connector on the trailer
- 1-Year limited warranty
57004 Curt 7-Way to 4-Way and 5-Flat Trailer Adapter for VW, Audi, Porsche, and Mercedes-Benz Towing Trailers with LED Lights
Video of 7-Way to 4-Way/5-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 Curt 7-Way to 4-Way/5-Way Trailer Adapter Review
Hello neighbors. It's Brad here at etrailer. And today we're taking a look at the cut seven to four and five pole adapter. So as the name implies you are able to adapt a factory seven way to a four and five pole. And that's really nice because a lot of vehicles will have the factory seven way on there but maybe not the four pole. So if you look came to hook up to a trailer and realize that they have a four or five pole, you might be out of luck or have to run additional wire to permanently mount it.
Well, that's where this comes into play. So that's gonna allow you to be able to have your seven way, your four pole, as well as your five pole just with plugging into the factory seven lane. Now, sometimes your towing vehicle will not recognize the LED lamps on your trailer. And that's where this is great too as plugging that in is gonna allow this to send that signal to your vehicle making sure that your lights are actually working with your signals. So like our neighbor here they have a trailer with a four pole but they got a new vehicle that has a seven way.
So instead of having to run all new wiring for it you can simply plug this into the factory seven way. You can take your four pole and plug it in or if you have the same vehicle but you're towing a different trailer. This gives you that same ability. So having this is going to allow you to hook up electrically to those trailers. So now let's go ahead and test it.
So first I'm gonna start with my running lights. Next I'm gonna do my left turn signal, my right turn signal. And then finally my brakes. Now this neighbor also toes, a boat trailer. So having the five pole is gonna be really nice for the surge lockout as well as reverse light.
Now, for some of your foreign vehicles or high end vehicles that have LED taillights sometimes they don't have enough power to power the trailer lights. Well, this is gonna help with that. Allowing that to give it enough juice to be able to still retain your lights on the trailer. Something that's really nice about this is the size and that if you normally tow a seven pole you can simply swap this in whenever you're picking up a different trailer and need to hook up or really you can use this to hook up to any trailer. You have that ability and you can keep this in your glove compartment until you need it. And that was a look at the cur seven, two, four and five way adapter..
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
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Customer Reviews
7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs - C35FR
Average Customer Rating: 4.7 out of 5 stars (72 Customer Reviews)
Curt 7-way connector to 4-way or 5-way flat connector is designed for use on vehicles with Trailer Lamp-Out sensors when towing a trailer equipped with LED lights.by: Chip O03/11/2024
Incredible service by e-Trailer and specifically by Emily who answered my questions even on Sunday! She was knowledgeable about the product and knew exactly what I needed to solve the problem with the lights on my trailer. I would do business with e-Trailer again in a heartbeat. They are the best!!!
by: Bradley 03/20/2024
Exactly what I needed for my audi trailer lights now work perfect
by: Dean S.10/14/2023
When my 4-pin trailer light plug was plugged into my Jeep Grand Cherokee (GC)'s 4-pin connector, the GC reported (on the dash and via a highly annoying beep every time I hit the brakes!) that the LED trailer lights were out, presumably because LED lights don't draw enough current (don't have enough resistance). When using this adaptor that plugs into the GC's 7-pin connector and adapts to my 4-pin plug, problem solved! (I had plugged into another trailer that had incandescent lights, and I didn't have a problem. So I can use this adaptor when I'm pulling a trailer with LED lights, and not use it when I'm pulling one with incandescent lights...perfect!)
by: Wayne T02/24/2024
Well built and works well with my OEM Toyota Tacoma towing package.
by: Dini07/02/2022
Product as described and works as it should. I have this adapter on a 2008 Mercedes ML320 CDI and a 2008 Mercedes GL320 CDI. I have hooked both suvs into uhaul trailers with led lights and everything is working good.
by: Steven12/28/2023
Works great and solved the trailer light issue with my 2020 GMC Sierra.
by: Dino 09/05/2022
Works great on my 2008 ML320 oem traile r.
Dino
9/6/2023
Still working great. I keep in my trunk as part od my car kit.
by: Robert D04/08/2024
Works great!
by: Pat04/07/2024
The product was exactly what I needed. Thanks for the help.
by: James 02/12/2024
Works like a charm.
by: Arthur12/22/2021
Fixed the issue I had with my Mercedes GL550 not switching to towing mode and enabling all the LED trailer lights!
by: Dikina Bawks05/03/2023
Was having a dilemma about how to address the hyperblinking and other issues with my trailer LED lights. This worked perfectly, and was quick and easy. Seems to be a well constructed product as well. 2021 Sprinter
by: Michael12/20/2023
Works well.
by: Ed B.11/26/2022
I ordered a series of parts to use a hitch extender for my truck camper. The process was easy, the online specs and details ensured I ordered the correct parts. Everything works as advertised a year later. I’m pulling a 16’ enclosed Sure-Trac trailer for my UTV and it lights up the night. Thanks etrailer for an easy process.
by: Alex07/14/2022
Doesn't work with my 2021 GMC 3500 HD Sierra. The 7 way works with trailers but I can't get the adapter 4 way to work with LED lights. The truck sees that there is a "trailer" attached but the LED's don't work. If I put the LEDs on a 12V battery they all work brilliantly.
Called CURT. They didn't know what would allow LEDs to work with my truck.
Looking for a solution.
Brooke M.
8/3/2022
A simple and perhaps silly thing to do would be to make sure that everything is properly seated on both the trailer side and vehicle side. Additionally, this part does have a one year limited warranty you may want to look into if making sure things are plugged in all the way doesnt help.
by: Dwayne 09/07/2023
Worked perfectly
by: Mark 08/20/2023
Perfect match. Great quality.
by: Greg05/01/2023
Did not work as advertised, Requested r efund.
Jenny N.
5/2/2023
I wanted to reach out and see what was not working with the adapter? I would like to see if I can help.
Greg
5/3/2023
The adapter is supposed to work for cars that pull a trailer with LED lights, I plugged it in, and nothing. I plug in non LED lights and it works. How do I go about sending it back for my refund? I put in a request and haven’t seen a email regarding it.
Jenny N.
5/3/2023
I will have our Customer Service team contact you about returning the adapter.
by: Mark 07/31/2023
quick service and delivery, good consultation and the product worked perfectly!
by: Austin 10/05/2022
This solved my tow light issues when connecting a LED light to a Volvo XC60.
by: Gary08/14/2020
Problem solved! I had ordered a set of the Blazer wireless LED trailer lights for the towed vehicle behind my motorhome. They didn't work. After trying another set that didn't work then calling the manufacturer I was about to give up. However, thanks to Tommie C at etrailer, he recommended this adapter and it resolved the issue. etrailer is the BEST! Great products, great customer service, great technical support.
by: Gerard07/22/2020
Works great. Solves the problem of LED lights triggering faults on our BMW X5. The lights work and the car electronics don't signal any faults and switch the rear parking sensors off as designed.
by: Michael 07/19/2021
I recently purchased this product and it solved the light monitoring system errors that I was having with my 2012 BMW X5. My trailer was equipped with LED lights and the adapter was the perfect solution.
by: Max12/23/2021
Product ended up not working very well - the funky. chinese wiring was not a straight forward hook up and i got the lights to eventuLly work, but even with an adapter it sets off the lights out computer in my car and i get no brake lights .
by: Don N11/25/2021
Roger in Customer Service was simply excellent. Been trying to get a special adapter for my trailer for months (floating on some ship in the Pacific!). He persisted with two suppliers and one showed up today!! He even asked if I wanted to cancel the other order. Really on top of things and found this to be true with this company.
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See what our Experts say about this CURT Trailer Wiring
- Will LED Trailer Adapter # C35FR Allow Trailer With LED Taillights FunctionYes, the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # C35FR is designed for exactly what you are experiencing. It will allow a vehicle with bulb out sensor display codes tow a trailer with LED lights without an issue.
view full answer... - Solution for Newer Ford with Bulb Out Error Message When Using LED Hitch CoverThis 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 # C35FR which has diodes in it that increase the amperage draw to what an incandescent bulb would draw on a trailer which eliminates the error...
view full answer... - Tricky Tow Package Wiring on 2013 Audi Q7 to Think a Trailer is ConnectedCircuit tester # PK12741 will likely not draw enough power to make the tow package on your 2013 Audi Q7 think a trailer is connected. This is due to the light power draw from the LED lights. What you need is adapter # C57003 for a 7-Way to 7-Way or # TR20141 for a 7-Way to a 4/5-Way. These adapters have load resistors that will simulate additional load on the system so that the vehicle won't throw the bulb out alert when a trailer is connected. If you are just doing some testing you...
view full answer... - Trailer Wiring Recommend for 2016 Ford Escape Allow Lighted Hitch Cover to Work w Out Error MessageYour best option at this point is going to be to install an aftermarket 4-way like part # 118566. I know that seems like a silly option since you have a 4-way already. But installing a new 4-way will bypass all of the taillight sensors and will allow you to use a lighted hitch cover like the # FHG72VR without issue. The # C35FR does not have a 4-way to 4-way equivalent either.
view full answer... - Trailer Running Lights Are Brighter Than Brake Lights When Vehicle Lights Are OnThe 7-Way to 5-Way/4-Way Trailer Adapter # C35FR 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... - Does The 2022 Jeep Cherokee Trailhawk Require a Charge Line For Flat Towing Will It Wire With 4-WayThe 7-Way to 5-Way/4-Way Trailer Adapter # C35FR you found is for vehicles which have lamp out sensors and are towing a trailer or vehicle with led tail lights. Since your 2022 Jeep Cherokee Trailhawk should have a Charge Line # RM-156-25 I recommend using the Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit # RM-146-7 to connect your motorhome to the front of your Jeep. This kit includes a 6-way you can install on the front of the Jeep. This gives you the additional wiring needed for running...
view full answer... - Left Side Trailer Lights Not Working But All Other Lights are FineOn 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 # PTW2993 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... - Troubleshooting 7-Way to 5-Way Adapter Where Stop/Turn Circuits Arent ActiveFirst thing you will want to do is use a circuit tester like part # PTW2993 to test the stop/turn circuits of the 7-way you have on your vehicle. It sounds like maybe those circuits are shorted out and that is why it seems like the adapter # A75TB isn't working properly. If this is the case you will want to check the conditions of the wiring on the back of the 7-way as well as check for and clean any corrosion you find on the 7-way pins. The next step will be to connect the # A75TB to...
view full answer... - Can Curt 7-Way to 4/5-Way be Used with Just 4-WayYes, if you used the Curt 7-Way to 4/5-Way part # C35FR with a 4-way it will work just fine. The 5th pin of the adapter would basically just not get used which has no impact on the other 4.
view full answer... - Solutions for 2010 Range Rover that Doesnt Detect LED Trailer LightsNormally for the problem you are describing we recommend the # C35FR as it is designed to fix the problem you are describing, but we have found that this product does not work on Range Rovers for some reason. The best recommendation I could make for you would be to replace the lights on your trailer with incandescent bulbs or install load resistors on the trailer lighting circuits like part # DI34ZR. I attached a link to the right that has all of the trailer lights we offer with incandescent...
view full answer... - Audi 2018 SQ5 LED Trailer Lights Adapter RecommendationWe 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 # C35FR. 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.
view full answer... - Replacement 7-way for 2009 Audi Q7 and 7-way to 4-way Adapter for Trailer with LED LightsYou are right on both counts! The correct replacement 7-way for your 2009 Audi Q7 is in fact the Mighty Cord Replacement 7-Way RV-Style Trailer Connector for Factory Tow Package # A10-7072VP. In regards to the 7-way to 4-way adapter # 47345, there is a specific one you will want to use if your trailer has LED lights, which is the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # C35FR.
view full answer... - 7-Way to 4-Pole Wiring Adapter for Audi Q7The wiring in many German autos will not react well to the presence of LED lighting on a trailer, or even in an item like the 7-to-4 Adapter # 47345. I recommend you try another 7-to-4 adapter that does NOT have built-in LED test lights, such as # PK12716, if your trailer does NOT have LED lights. If it DOES have LED lights the instead use # C35FR. You can also use a coiled cord type adapter like # 787196 or # HM47065.
view full answer... - Installing LED Lights On Trailer Connected to 2003 Dodge Dakota with Incandescent LightsThe 2003 Dodge Dakota does not have a converter box as a part of the trailer wiring. Here is where confusion comes in and where ambiguity comes. Some LED lights may have zero issue plugging directly into the system based on the trailer length, ground connections, and number of LED's in each light fixture. Due to enough power draw. Other trailers may not have enough power draw and may have hyperflashing issues requiring load resistors either on each line or through a converter like #...
view full answer... - Functions on the Output Side of 7-Way to 5-Way and 4-Way Trailer Adapter for German VehiclesOn the 7-Way to 5/4-Way adapter, # C35FR, for German vehicles, you are only going to have the basic lighting functions on the 4/5-Way side (left and right turn, running lights, brake lights). The 5-Way will also have a reverse light function if that circuit is functional on the 7-Way. But it does provide additional load to take care of that bulb out sensor issue that plagues newer German vehicles like your 2013 Mercedes GL450. The other option is to install load resistors, # DI34ZR, in...
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view full answer... - How To Get Rid Of Check Bulb Warning On 2020 Chevrolet Silverado 2500 Towing Trailer With LED LightsIt is pretty common for newer vehicles like your 2020 Chevrolet Silverado 2500 to have issues with trailers that have LED lights due to the factory computer expecting to see a certain draw from the circuit, but LEDs have a very low draw. To fix the issue I recommend the 7-Way to 5-Way/4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs # C35FR if your trailer has a 4-way connector on it, or the # 20142 if your trailer has a 7-way connector. These adapters...
view full answer... - Adapter Recommendation for German Vehicle Towing Trailer with LED LightsYou were told correct information. The problem with the Mercedes vehicles and trailer's with LED lights is that the LEDs put such a small amount of draw on the circuits that the vehicle ends up thinking that a taillight bulb has blown out. 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 # C35FR.
view full answer... - Adapter Recommendation for German Vehicle Towing Trailer with LED LightsFor 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 # C35FR.
view full answer... - What are the Pin Out Functions of the 7-Way to 5-Way and 4-Way Adapter # C35FRThe 5 functions that the 7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights # C35FR 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...
- Trailer Wiring Adapter Recommendation for a 2011 Mercedes ML350 for Towing LED TrailerIf 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 # C35FR 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 # C35FR will convert a 7-way to a 4-way.
view full answer... - Pilot Hitch Receiver Step with LED Lights Causes Bulb Out Error on 2016 Ford F-150 OEM Tow PackageThe problem is that some tow packages cannot sense that LED lights are drawing power because they draw such little power. This is not an uncommon issue and there is a fix for it. Your 2016 Ford F-150 with factory tow package should have included a 7-Way trailer connector that you can use with adapter # C35FR. This adapter will increase the load on the electrical system so the truck thinks that regular incandescent bulbs are being used. Please note that the problem you are having now can...
view full answer... - Troubleshooting BackUp Sensors Bulb Out Message with Bully LED Hitch-Mounted Step On VW TouaregIt sounds like your back up sensors deactivate when you plug in trailer wiring. This would be to prevent the sensors from going off all the time while in reverse because of them detecting the trailer behind you. The best solution I can provide would be to install a second 4-way that bypasses the factory one of your 2014 Volkswagen Touareg. For that you would want the part # 118668. The error message you are receiving is a common problem on German vehicles when they are connected to a...
view full answer... - LED Trailer Tail Lights Not Working when Connected to a 2011 Mercedes GL550On many German vehicles such as your 2011 Mercedes GL550 there is a bulb out sensor error that occurs when a trailer with LED lights is connected to the vehicle. This is because the LED lights draw such a small amount of power the vehicle computer thinks there is a bulb out and won't light the trailer lights. There are adapters designed to correct this problem by using load resistors to draw more power so the system will function normally. You can use adapter # C35FR. It plugs into a 7-Way...
view full answer...
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Info for this part was:
Edited by:
Lindsey S
Installed by:
Jeff D
Installed by:
Bradley B
Expert Research:
Jameson C
Video Edited:
Jacob T
Video by:
Dustin K
Updated by:
Wilson B
Updated by:
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Updated by:
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Dini
7/3/2023
Still Great after a year. I couldnt be happier! Great for cars with no led lights to hook up trailers with LED lights