7-Way Round Pin to 4-Flat Adapter

Ask the Experts about this Tow Ready Wiring

• Wiring US 4-Way Trailer Connector to Trailer with European 7-Way Trailer Wiring
  Since you want to go from a 4-way on your vehicle to a trailer with a European 7 flat, you will simply be able to use the Tow Ready Vehicle to Vehicle Tail Light Converter # 118158 or Curt # C56196 if your trailer has LED lights. This will take the combined stop and turn signal wires on your 4-way and separate them for your European 7-way. You will connect the 4-way color-for-color and the running light will run around this adapter versus through it, and the ground will need to be spliced...
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• Diode Wiring Kit Recommendation for 2014 Ford F-150 Towed by Motorhome
  I recommend Roadmaster Universal Hy-Power Diode Wiring Kit part # RM-154. This kit is a confirmed fit for your 2014 Ford F-150. It wires diodes into your existing F-150 wiring and will use the factory lights when towing. We have detailed instructions for you to review, see link, and a video installation of this kit also.
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• Changing a US Style 7-Way Vehicle Connector to a European Style 7-Way Connector
  The European 7-Way does the same thing that the US 4-Way does. There isn't an adapter available because the European 7-Way has separate circuits for nearly every function on each side of the trailer. The US style 4 or 7-Way has combined brake lights and turn signals. What you will have to do is change over the US style 7-Way to a European one. You will need 1 European style vehicle side 7-Way and one special converter that separates the combined signals to separate ones. You will...
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• Light Kit to Flat Tow a 2015 Ford F-150 Behind a Motor Home
  For your 2015 Ford F-150 you can use 4-diode kit # RM-154. This is a more permanent installation that does require tapping into the vehicle wiring. For a more temporary solution you could use a magnetic kit such as # C-ATL20A but you would need to also use tow light partners # TLP01 because of the aluminum used in the 2015 Ford F-150s.
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• European 7-Pin to US 4-Way Flat Trailer Wiring Adapter for a Land Rover Defender
  There is a specific adapter for Land Rovers that have that European 7-Way connector # 118710. One end plugs into the vehicle 7-Way and the other end has a connector for a 4-Way flat connector used on US trailers.
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• Best Location to Wire a Tail Light Isolating Diode System
  The diodes in the Roadmaster 6-diode wiring kit # 154-792-118158 will be installed after the converter # 118158 (included in the Roadmaster 6-diode wiring kit) when using this kit. The easiest place to install the diodes is right behind the tail light assemblies where the wiring is easily accessible. I included a couple helpful articles, video review and a picture for you to view.
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• Recommended Adapter For Volkswagen With 7-Way Plug and Trailer With 4-Pole Flat
  It sounds like you have a 7-Way round plug on your 2009 VW Tiguan and you need to plug into the 4-flat on your trailer. I recommend use the Hopkins 7-Way RV to 4-Way Flat Trailer Connector Adapter, # HM47365. The adapter plugs into your 7-way on the VW and the other end plugs into the 4-flat on your trailer to power the trailer lights. I have attached a video for your reference.
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• Is the 7-Way Round on my 2003 Volvo US or Euro Spec
  Our understanding here at etrailer is that European spec trailer wiring connectors will have many more terminals than 7. However, there are some 7-way round, Euro spec connectors and I attached a diagram of how they are typically wired. What you could do is get a circuit tester like our # PTW2993 and test the functions of the terminals and compare them to the 7-way wiring chart I attached to see how it compares. If all of the functions are in the same place as the picture then you...
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• Wiring US 4-Pole Trailer Connector 2014 Ford F150 to For Trailer with European 7-way
  I am not aware of the existence of an adapter, but one could be easily constructed. You will need to find a vehicle-side socket to receive the plug from your trailer. We do not carry them, so you will need to obtain one locally. You will also need a vehicle to vehicle taillight converter like part # 118158 and a trailer side 4-pole like part # 18004. You would then wire the converter as shown in the diagram I provided. Using this adapter will separate the turn signal back out so that...
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• Can a 12 Volt Battery on a Dump Trailer be Charged from a 7-Way Trailer Connector
  The 12 volt circuit on most 7-Way trailer connectors is fused at 30 amps/12 volts. At best it can provide a maintenance charge to a trailer mounted battery. But it cannot charge up a battery; at least not one that is the size of the battery used to operate functions on a dump trailer. Most vehicle alternators are not strong enough and the tow package wiring not large enough for enough amperage to get back to the battery. I recommend using an AC charger when you can to charge and recondition...
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• Can a European 7-Way Trailer Connector be Converted to a U.S. 4-Way
  No. The 7-Way end in the # 118709 adapter is made for the North American style of 7-Way round pins. A European 7-Way, see picture, has separate turn signals and brake lights and a circuit for fog lamps. The tail lights are also separate. You would need to fabricate a special adapter to get the 2 to work together. I would need to know which end has the European 7-Way, the vehicle or the trailer. It would also require a semi-permanent change to the connector on the vehicle or possibly...
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• Trailer Wiring Harness Recommendation for a 2014 Volkswagen Golf TDI
  The wiring harness you would need for your 2014 Volkswagen Golf TDI would be the Tow Ready wiring harness part # 119190KIT. This is a universal install harness that will require you to tap into the turn signal wiring to install and will require you to run a wire up to the vehicle battery. I attached an install video and a help article that details how to find the best way to route the power wire up to the battery. To access the taillight wiring you will need to remove the interior...
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• Is a European 13-Way to US 4-Way Adapter Available
  Unfortunately we do not have an adapter to go from a European 13-way trailer connector to a U.S. style 4-way trailer connector. European trailers typically have separate brake light and turn signal circuits, but U.S. trailers use a combined wiring system that use one wire for the turn signals and brake lights. You could make an adapter using a universal 4-way flat tail light converter like part # 119130, but you would need to find a European trailer side 13-way connector that can be...
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• Adapter Availability for Converting European Trailer Wiring for Use with 4-Pole U.S. Connector
  We do offer a range of wiring adapters for U.S. standard trailer wiring to convert from, for example, 7-way to 4-way, 5-way or 6-way wiring. These various connector types are shown in the linked article on trailer wiring. However, European trailer wiring does not combine multiple functions on one wire like U.S. wiring. U.S. 4-pole trailer connectors combine stop and turn signals on one wire; the yellow wire carries stop and left turn; the green wire carries stop and right turn. Since...
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• Splicing in a 7-Way Trailer Connector to Trailer Tail Light Kit # TL5RK
  The issue is that on the 7-Way you bought the wire colors and functions do not match the 4-Way in the light kit. On the 7-Way it has the following wire colors and functions: White is ground Red is left turn/brake lights and will connect to the yellow wire on the light kit Brown is right turn and brake and will connect to the green wire on the light kit Green is tail lights and will connect to the brown wire on the light kit Blue is for trailer brakes Black is for 12 volt power Yellow...
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• Can a European 7-Way Trailer Connector be Converted to a U.S. 4-Way
  You have 2 options. First you can convert the Escalade wiring harness, after installed, to match the trailer. Or you can convert the trailer connector to match the vehicle connector, once it is installed. The easiest thing to do would be to convert the trailer but there may be certain lights and functions required in Europe that are not required in the U.S. I will try to cover both ways for you but there is no simple adapter for either method. To convert the vehicle, first you will...
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• Parts Needed to Flat Tow a 2016 Ford F-150 King Ranch with LED Tail Lights Behind an RV
  For tow bar wiring for your 2016 Ford F-150 I recommend going with a magnetic kit # C-ATL20A. The issue is that the diode kits and converters that go with them are not rated for use with LED tail lights. The best option then is going to be a magnetic kit. And having a wireless system means you won't have to run any wires or worry about complicated installations on the truck. Since the lights are magnetic you may need to use tow light partners # TLP01 in the windows of the truck if the...
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• Wiring US 4-Pole Trailer Connector to For Trailer with European 7-way
  I am not aware of the existence of an adapter, but one could be easily constructed. You will need to find a vehicle-side socket to receive the plug from your trailer. We do not carry them, so you will need to obtain one locally. You will also need a vehicle to vehicle taillight converter like part # 118158 and a trailer side 4-pole like part # 18004. You would then wire the converter as shown in the diagram I provided. Using this adapter will separate the turn signal back out so that...
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• Can a European 7-Way Trailer Connector be Converted to a U.S. 4-Way
  You have 2 options. First you can convert the Ford Focus wiring harness, after installed, to match the trailer. Or you can convert the trailer connector to match the vehicle connector, once it is installed. The easiest thing to do would be to convert the trailer but there may be certain lights and functions required in Europe that are not required in the U.S. I will try to cover both ways for you but there is no simple adapter for either method. To convert the vehicle, first you will...
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• Will the Tow Ready 7 Round Pin Adapter Allow My Freightliner Pull My Utility Trailer With a 4-Way
  If the plug on your Freightliner is a traditional vehicle side 7-way round pin connector like the one in the picture provided, and it is pinned the same then the Tow Ready 7 way to 4-Flay adapter part # 118709 would work out great. If you use this connector then no additional diodes would be needed.
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• 7-Way European Socket to US 4 Way Recommendation
  Bascially, there is no easy way to convert the European 7-Way to a US 4-Way. We do not carry any kind of adapter that you could use. You are left with 2 options. First, you would install a separate wiring harness which would be the easiest. Or, you could attempt to fabricate an adapter. You would need to use a converter, # RM-732. The red wire on the input side would attach to the brake light wire on the vehicle wiring. The white wire grounds to the frame. The yellow wire will attach...
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• Are Diodes Needed If Vehicle to Vehicle Tail Light Converter 118158 Is Used to Tow European Trailer
  You will not necessarily need diodes because the back feeding would only be slight and should not be enough to cause any problems. But if you wanted you can still use diodes, # RM-690, one on the right turn/brake and one on the left turn/brake circuits on harness 18252. Basically, they will go before the # 118158 harness on the green and yellow wires.
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• Using Separate Brake Lights and Turn Signals on a European Trailer with US Chevy Silverado
  The issue is that trailers in the US use a combined lighting system where the brake lights and turn signals are on the same circuit. European trailers have a separate circuit for each function. The wiring harnesses for US spec vehicles will take the separate brake light and turn signals and combine them for use with a US trailer. If you plug in a European trailer then it would function like a US trailer. To fix this issue you can install a converter on the European trailer. Converter...
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• Using a Taillight Converter to Wire a 2008 Chevy Uplander for a European 7-Way Trailer Connector
  There are 2 ways you can tow the European trailer with a US 4-Way flat connector. You will either need to change the connector on the vehicle or change the connector on the trailer. Depending on which one you choose the converter # 118158 will either be on the vehicle side or the trailer side. No diodes are needed. 1). With your current setup, you will not need any diodes. The intended purpose of the diodes when used in conjunction with the taillight converter # 118158 is for a flat...
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• Tail Light Wiring Converter to Join European Motorcycle and U.S. Trailer Wiring Formats
  As you noted, trailers made for the U.S. use a combined wiring scheme for their lighting. Stop and turn signals for each side of the trailer are combined into one circuit and one wire. European wiring is different; it has all separate circuits. This is why there are no simple adapters that can join the two wiring standards and why converters are needed. Since your German-made Rewaco trike would be wired to the European standard you will need a converter to make it compatible with your...
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• Converting a Trailer with 12 volt Lights to 24 volt Lights for Compatibility with a Euro Spec Truck
  I think your only real option would be to replace the trailer lights on your trailer with lights that are compatible with 24 volt systems since there isn't an adapter available that we offer that would work for converting your 24 volt system to work with a 12 volt lighting system. Right now, we have a few select 24 volt tail lights. We have # STL23R24B and # STL90R24B. For turn/marker lights we have # STL90A24B and # STL23A24B. And for reverse lights we have # BUL23C24B and # BUL90C24B.
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