7-Way Round Pin to 4-Flat Adapter

Tow Ready Wiring - 118709

Features:

• Adapts a 7-way round pin to 4-flat connector

118709 Tow Ready 7-pin to 4-flat Adapter

Customers compare 118709 to these similar products

Trailer Connector Adapter for Land Rover - 7-Way, Round Pin, European Style to 4-Way Flat

(39)

$21.86

Pollak 7 Pole to 4 Way Connector Adapter

(384)

$8.97

Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector

(358)

$23.40

Pollak 7 Pole Round Pin to 4 Pole Flat Wiring Adapter

(9)

$10.57

Adapter 7 Pole to 4 Pole with Tester and Cover

(120)

$7.64

Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade

(64)

$21.49

Adapter 4-Pole to 7-Pole and 4-Pole

(237)

$32.25

7-Way RV to 4-Way Flat Trailer Connector Adapter

(30)

$19.46

Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long

(32)

$17.02

Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps

(143)

$26.93

7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights

(108)

$13.97

Hopkins Endurance Multi-Tow Trailer Connector Adapter - 7-Way to 6-Way, 5-Way or 4-Way

(101)

$26.25

Hopkins Heavy-Duty Trailer Coiled Wire Adapter for 7-Way to 4-Wire Flat

(65)

$23.05

Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector - Trailer End

(36)

$7.61

Hopkins Trailer Connector Adapter - 7-Pole Round Pin to 6-Pole

(16)

$18.52

7-Way Round RV Style Trailer Connector - Trailer Side

(86)

$4.48

Customers Who Purchased This Wiring Also Bought...

Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade

(64)

$21.49

Karrier ST205/75R15 Radial Trailer Tire with 15" White Wheel - 5 on 4-1/2 - Load Range C

(817)

$114.81

Pollak 7 Pole to 4 Way Connector Adapter

(384)

$8.97

T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector

(300)

$74.15

Curt Pintle Hook with 2" Hitch Ball - Bolt On - 10,000 lbs/16,000 lbs

(7)

$59.47

Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional

(1851)

$122.48

Curt Pintle Hook Mounting Plate for 2" Hitches - 8-1/4" Shank - 8 Hole - 10,000 lbs

(1)

$40.82

Hopkins Trailer Connector Adapter - 7-Way RV Style Blade Plug to 7-Pole Round Pin

(44)

$23.13

Karrier ST175/80R13 Radial Trailer Tire with 13" White Wheel - 5 on 4-1/2 - Load Range D

(817)

$106.95

Adjustable Lunette Ring with Channel - 3" Diameter - 24,000 lbs

(4)

$55.22

Economy - This item

7-Way Round Pin to 4-Flat Adapter

17 reviews

Code: 118709

Retail:$11.79

Our Price: $7.99

• Wiring
• Wiring Adapters
• Single-Function Adapter
• 7 Round Pin
• Plug Only
• 4 Flat
• Tow Ready

more information →

Economy

Price: $8.97

$0.98 More

Pollak 7 Pole to 4 Way Connector Adapter

384 reviews

Code: PK12716

Our Price: $8.97

• 7 Blade
• Pollak

Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.

more information →

Value

Price: $21.86

$13.87 More

Trailer Connector Adapter for Land Rover - 7-Way, Round Pin, European Style to 4-Way Flat

39 reviews

Code: 118710

Our Price: $21.86

• Plug and Lead

Plug this adapter into the 7-way, round-pin, European-style trailer connector on your Land Rover to get a 4-pole, flat connector to fit your towing needs.

more information →

Premium

Price: $23.40

$15.41 More

Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector

358 reviews

Code: 30717

Our Price: $23.40

• 1 Foot Long
• 4 Flat
• Plug and Lead
• 7 Blade

more information →

Video of 7-Way Round Pin to 4-Flat Adapter

Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.

Tow Ready Wiring 118709 Review

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

• 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...
  view full answer...


• 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...
  view full answer...


• 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 wireless kit # NV-5164. 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...
  view full answer...


• 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.
  view full answer...


• 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...
  view full answer...


• 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...
  view full answer...


• 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...
  view full answer...


• 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.
  view full answer...


• 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.
  view full answer...


• 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...
  view full answer...


• Recommendation for Converting a Euro Style 7-Way to a Standard 7-Way
  
• I wish I had an adapter that would allow you to plug your Euro 7-way from your Jeep Wrangler into the connector of your trailer but we do not carry anything that will do that. The best solution I can offer you is to cut the Euro 7-way off of your vehicle and wire a new 7-way to your vehicle by function. The best way to do that is to use a circuit tester like our # 3808 to determine the functions of the wires by having a buddy apply the different brake and tail light functions while you...
  view full answer...


• Lighting to Tow a 2015 Ford Fiesta ST Behind a Motor Home
  
• Trailer wiring harness # 56047 is for a 2015 Ford Fiesta sedan. But the ST is a hatchback so the harness will not fit. For a hatchback you would use # 118641. Another issue is that you would not use this type of harness to tow the Fiesta behind the motor home. This harness is for a Fiesta to tow a trailer behind it. It does not work in reverse so you need a different lighting solution. Since there aren't any plug in tow bar wiring harnesses for the 2015 Ford Fiesta ST at this time,...
  view full answer...


• What to Do with 12 Volt Circuit when Adapting US 7-Way Trailer Connector to European 7-Way
  
• If the European 7-Way trailer connector does not have a 12 volt circuit (which it shouldn't) then you will not have to do anything with that circuit on the vehicle side. When you add a US style 7-Way to the bike rack that circuit will just dead end at the connector. If there is a loose 12 volt circuit wire then you can just use a wire nut or electrical tape and just cap it off and stow it out of the way.
  view full answer...


• 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.
  view full answer...


• Converter To Wire 4-Way Connector On 2009 Jeep Compass To 7-Way European Connector On Trailer
  
• We do not carry the vehicle-side plug for a European plug like you mentioned is on your motorcycle trailer. You will need to find one locally. You can use the tail light converter like part # 118158, and along with a 4-way harness like part # 18004, you can make an adapter that will work for you. I have attached a photo with all of the wires for input and output noted you can check out. Diodes will not be needed because the trailer will not backfeed through the system.
  view full answer...


• 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...
  view full answer...


• Flat Towing Wiring Options for 2014 Ford F-150 Platinum
  
• Strictly speaking, both you and your friend are correct. It just depends on which type of toad wiring harness is used. The link at right will show you all flat-towing wiring kits for the 2014 Ford F-150 Platinum. These include a custom-fit option from Hopkins, part # HM56000. This kit installs without cutting and splicing by plugging in to the F-150 tail lights and includes integrated diodes to prevent feedback. This operates as a combined lighting system.
  view full answer...


• 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...
  view full answer...


• 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...
  view full answer...


• Converting European 7-Way on 2014 Volkswagen Golf to US Spec 7-Way
  
• You will need to replace either the connector on the VW or the one on the trailer. It would be easier to change the one on the VW because a US spec trailer has different functions than a European trailer and the functions would not match up. US trailers have combined brake lights and turn signals. A European 7-Way has a separate circuit for each light. Since your Golf already has a trailer connector all you will need to do is cut off the 7-Way end. Then you would use a convert to combine...
  view full answer...


• Adapter for 2015 Audi Q5 to go From 7-Way to 4-Way
  
• The 7-way you have on your trailer is most likely a 7-way blade style connector so you would need the part # 47345. If you happened to have a 7-way round pin connector instead the adapter you would need is the part # 118709. The adapter you referenced is designed for Euro style connectors which wouldn't be what you have.
  view full answer...


• 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 # 3808 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 know...
  view full answer...


• Is there an Adapter that will Convert a 4-way Round Trailer Connector to a 4-way Flat Vehicle End
  
• I have checked the adapters that we currently carry, and we do not have an adapter that will fit the configuration that you specified. You could create your own adapter, and it would be composed of the Pollack # PK11410 and the Hopkins Endurance 4-way Flat Trailer connector # HM48110. You would just wire the Hopkins 4-way flat to the Pollack 4-way round connection point. This will create an adapter that will connect the 4-way round on your 1972 trailer with a 4-way flat vehicle connection...
  view full answer...


• 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...
  view full answer...


• 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...
  view full answer...


• 7-Way Round to 4-Way Flat Adapter Recommendation
  
• As long as the 7-way round you have on your trailer is wired so that the stop/turn circuits are on the same circuits the # 118709 would be perfect for what you are trying to do. If the 7-way you have is a Euro style that has separate taillight circuits then you would need to make an adapter, but I doubt this is this case. If your 7-way is wired like the diagram I attached you would be good to go.
  view full answer...


• 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.
  view full answer...

Do you have a question about this Wiring?

Why etrailer.com?

At etrailer.com we guarantee:

Highest quality wiring for the best price.

• Our Lowest Price Pledge ensures you will never overpay for the parts you need.

Real product know-how.

• We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. This helps you get the right product the first time.
• Every day our teams test, review, assemble and install our products. Our modern installation facilities allow our expert installers and customer service representatives to actually install and use the items we sell, so you can get real advice, from a real person who has the knowledge and expertise needed to solve your problem.

Most detailed, accurate wiring information available.

• Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.

Information for this part was:

Photos by:
Theodore B

Expert Research:
Michael L

Expert Research:
Michael H

Expert Research:
Jameson C

Expert Research:
John H

Expert Research:
Adam R

Updated by:
Laura H

Expert Research:
Rachael H

Expert Research:
Jeffrey L

Installations, made easy.

• We love helping people.
• We have the most highly trained customer service, hands-on experience, step by step videos and installation instructions. We are prepared to answer any question, give advice, or troubleshoot any problem you come across.

Fast shipping.

• Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.

Personalized service for life.

• We provide one-on-one, personalized service from the ordering process through the life of your product.

Trusted since 1946.

• We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.