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Wiring > Wiring Adapters > Single-Function Adapter > 7 Round Pin > 4 Flat > Tow Ready

7-Way Round Pin to 4-Flat Adapter

Tow Ready Wiring

ratingratingratingratingrating (4 reviews)

Code:   118709



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Tow Ready Wiring - 118709


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

118709 Tow Ready 7-pin to 4-flat Adapter

Customer Reviews

7-Way Round Pin to 4-Flat Adapter - 118709

Average Customer Rating:  ratingratingratingratingrating4.8 out of 5 stars   (4 Customer Reviews)

- 118709

ratingratingratingratingrating by: Bruce Passow10/15/2013

Is this review helpful?

I used this product along with your Trailer End Connector - 4-Flat - Coiled cord - item #54000-026, on the lights on our Brent and Parker grain wagons. This has worked out great so far. We haven't had the problem of too much or too little cord for the trailer lights, which allows the cord to get pinched and cut or stretched and broke. I just need to come up with a method of securing the cord and plug to the trailer tongue when not in use. 103907

- 118709

ratingratingratingratingrating by: Andy D08/22/2013

Is this review helpful?

Great customer service. Charlene C informed me that what I'd ordered would be delayed and offered an "in-stock" substitution option. Actually was cheaper and upon delivery found it to be equal to my original choice. I am very happy with the service and product.96356

- 118709

ratingratingratingratingrating by: Tim G12/14/2012

Is this review helpful?

Product was just as it was advertised and the service was better than expected! Super fast shipping and vendor stayed in email contact from the time the item was ordered until it was received. I plan on using etrailer for future orders for my truck needs.61448

- 118709

ratingratingratingratingrating by: Deb W.01/20/2014

Is this review helpful?

Arrived promptly. Works great! 114271

Ask the Experts about this Tow Ready Wiring
Expert Answers about 7-Way Round Pin to 4-Flat Adapter - 118709                                            Do you have a question about this Wiring?

  • 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 the trail
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  • 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 use th
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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 the s
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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 # 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 it is U
    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.
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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 need
    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...

  • 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 is
    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 rewired.
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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.
    view full answer...

Info for this part was:

Photos by:
Theodore B

Expert Research:
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Jameson C

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