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Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector

Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector

Item # 30717

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Tow Ready Plug and Lead Wiring - 30717
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Lowest Prices for the best wiring from Tow Ready. Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector part number 30717 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (459)
  • Q & A (324)
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Tow Ready Wiring - 30717

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Blade
  • 4 Flat
  • Plug and Lead
  • Tow Ready
  • 1 Foot Long


  • Adapter converts from 4 pole wiring on vehicle to 7 pole round plug
  • Additional wire leads for brake, power and accessory are 12" long
  • Mounting bracket (18138) is sold separately

Wiring diagram

Product detail


20321 Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector






California residents: click here


Video of Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector


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 - 30717 Review


Customer Reviews

Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector - 30717

Average Customer Rating:  4.8 out of 5 stars   (459 Customer Reviews)


- 30717
by:

I have posted reviews before but I really cant find any other words to more adequately express how pleased I am with etrailer. Of course, the products are top notch. But the service before, during and after the sale is the best part of my experience. Truthfully, you may find a better price elsewhere on the internet (not often though), but I can assure you that better service and dedication to customer satisfaction cannot be found anywhere else! 668826



- 30717
by:

Works great, no issues. High quality connector, and great customer service support (because I wasn’t sure if I was buying the right connector or not). Will buy from etrailer again whenever I need trailer stuff - great company. 686989



- 30717
by:

I wish all on-line business were as good as etrailer, I have made several purchase for my trailer needs with these good folks and you cant beat the service or selection. Every hitches fits with no issues and are built extremely well 643167



- 30717
by:

I wanted to show the custom installation. I did not want it under the bumper 553041



- 30717
by:

I was wanting to pull an enclosed trailer that has 7 pole plug in, with my vehicle that only has 4 pole plug in, without messing with the wires at this time, so I ordered the 4 pole to 7 pole adapter for this purpose. When item arrived I plugged adapter in, checked lights and on my way I went. all the extra wiring is there when I decide to add a brake controller. Now I can unplug the adapter and still use my 4 pole plug in. The item was well put together with tight wiring, price was reasonable, the shipping was smooth and the website is outstanding with plenty of instructions, wiring diagrams and the how to videos are a real plus on wiring up trailers. Thanks for an informative website and great product. 222496



- 30717
by:

Connected existing 4 pole from van to seven pole on my pop up camper. 90538


Comments

Still happy with the connector. Traveled from Buffalo to Mt Rushmore then St.Louis and back this past summer. No problems.

Tim - 01/17/2015

8683
Comments

Did you also use a brake controller when,yiu went from 4 to,7

-- comment by: Denise - 03/14/2016

17110
Comments

@Denise, Yes I do have a brake controller installed.

-- comment by: Tim K - 03/15/2016

17120

- 30717
by:

I received this purchase and was installing it the next day. Luckily I read the other reviews and saw that I HAD to attach the white ground cord that was sticking out of the harness. Upon looking, I found the white wire that comes out out of the flat 4 plug isn't attached to anything thus requiring the ground to be attached to the vehicle. All in all, I was very satisfied with this purchase. 178592



- 30717
by:

Now I've had it for a year and it still works as expected. I'm very happy with etrailer with everything from researching what to buy to product quality and getting followup questions. I couldn't ask for better service. 524325



- 30717
by:

After hours of trying to get this to work ( since I had gone threw the whole trailer and new truck wiring). I called a guy we know that works for the DOT field crew as an electrician. He took a meter to the system to find out in making the harness the ground was broken in the sheathing. He was able to cut repair and connect the wires so it worked great. This should of been checked before shipping. Cost me money for him to repair. I know this is a one in a thousand weird happening but shouldn't of left the warehouse to me. 473875



- 30717
by:

Used this adaptor to replace the factory tow package flat 4-pin connector on my 2019 Toyota Highlander. It's sad that Toyota is still using a cheap flat 4-pin connector on their factory tow package for a vehicle rated to tow 5,000 LBS. Would it really have cost that much extra for them to just use a round 6- or 7-pin connector to begin with? The installation was pretty straightforward using a new mounting bracket for the round 7-pin connector in place of the existing 4-pin bracket. I hooked up the white ground wire to the mounting screw for the new bracket after sanding paint off the bracket and nut and using dielectric grease for the ground wire and 4-pin connections. Spent some time re-routing and zip-tying wires and taped up the 3 wires on the adaptor that I won't be using. Nice clean installation. Trailer running lights, turn signals and brake lights work great. A quality product delivered in a timely manner by etrailer.com. 646987



- 30717
by:

Was exactly what they said it was & it works great. I highly recommend them. 208488


Comments

Its a very good product

Dave R - 07/27/2016

19729

- 30717
by:

I was surprised how fast the shipping was and the price for the product was very reasonable. I did not mind that there was no mounting plate for the adapter because I wanted something that would hook up to the camper when I need to use it and then take it off afterwards. I know I will be coming to etrailer for any other trailer or camper needs that may come up. 193891


Comments

could not be happier with the purchase that I made

Al N - 05/26/2016

18023

- 30717
by:

I was really skeptical about this adapter but for no reason! Installed in about 10 minutes using etrailer mounting bracket, dielectric grease, a couple zip ties, and some electric tape. Worked perfectly the first time I tested it on my trailer. 613442



- 30717
by:

etrailers is my go-to site for anything trailer related. Once again the part is perfect, pricing and delivery excellent. This part went on a 1991 Range Rover to connect to a rather battered PJ flatbed for a one time tow. Worked great! Thanks! 443606


Comments

I haven’t had an opportunity to use it, but it is good to have it available. Thanks for the follow-up!

Cate R - 10/18/2018

44781

- 30717
by:

The product did not come fully fabricated. When I connected to the trailer I could not get any signal to transfer through. So I took the item apart and the 4 pin ground was not connected to the 7 way ground. This meant I didn't get a closed circuit when connected. After stripping the ground wires and connecting them the product worked great. I would suggest buying if you know how to modify in order to connect the ground wires 46844



- 30717
by:

You would think anyone dealing with trailer hitches and trailer wiring parts would stock this 4 pin to a 7 pin connector. I got tired of looking locally and ordered this connector on line through etrailer. My little trailer does not have trailer brakes and I can now use my 7 pin connector installed on my truck or use the 4 pin set-up with my car. What a great universal connector without having to rewire your vehicle or trailer. I would recommend this connector to anyone pulling a trailer, thanks etrailer. 347065



- 30717
by:

This is a great product . The price was $18.00 dollars cheaper than some I found online. I have a 2002 dodge ram 1500 pickup, this adapter will change the 4 pole( which is made on my truck) to a 7 pole( which is on the trailer I will be using). The product connected, and bolted up to my truck bumper very easy. E trailer is the best. 121019


Comments

Im still enjoying this product, Ive used it several times, still workingwell

Rics49 - 04/06/2015

10630

- 30717
by:

This product works as expected. There is not too much to the installation, just plug it in properly and mount the ground wire. I did not find an easy way to mount this to my wife's Odyssey, or to the trailer hitch (item# 75270). Luckily, I do prototype design and manufacturing. So I came up with my own solution. I designed and made my own bracket to mount the 7 pole to the trailer hitch. It works like a charm, and looks great! 387667



- 30717
by:

There was no splicing wires, it was plug-and-play, highly recommended, very easy installation 137304



- 30717
by:

Has been working great since purchased and installed 3 months ago. Used for several different trailers and long distance trips. Easy to install. Had to be slightly creative with the attachment of the ground. Did not see a reason to have a ground on this portion since everything else is already grounded, however would not work without grounding to the frame. Only used the four way connection and taped remaining three back. Hope for good things to come with this produce. Highly recommend this product. 93648


Comments

Had the same issue with the ground kurt. Almost gave up on it until I read your post. Thanks.

-- comment by: mike g - 06/17/2014

4951
Comments

Thank you so much. Ours wasnt working either until we grounded it to car frame.

-- comment by: Sarah - 10/08/2015

15483

- 30717
by:

this connector along with the short L bracket and the mount bracket- gave me a nice connector to my hitch. Though I used the short connector and did have to slightly bend it to allow the 4 to 7 pole connector to fit. If Id bought the long L bracket-- It could have worked-- but bending a little worked well. 68963



- 30717
by:

Just what I needed. 96904


Comments

A year later and everything is working as it should. I dont give the product much thought and thats a good thing because that means its doing its job and doing it well.

Mike M - 08/26/2014

6464

- 30717
by:

Just what I'm looking for. Easy conversion for any situation. 717726



- 30717
by:

great 717679



- 30717
by:

Easy to install. After year full timing RV still working great 711368



- 30717
by:

The part was exactly what we needed, sturdy construction and very pleased. 682680



- 30717
by:

This order came in very fast. Works gre at 681431



- 30717
by:

worked great 678643



- 30717
by:

works Great. 677512



- 30717
by:

Works as should Quick shipping 666662



- 30717
by:

Great stuff. Well made. Quick shipping. 661582



- 30717
by:

all items as described fit perfectly easy install, shipping was quick. 660231



- 30717
by:

High quality at a great price. This site is awesome also. 651313



- 30717
by:

Item shipped quickly and was in perfect working condition. Exactly what I needed! 650670



- 30717
by:

Easy to install, a year later and they still work great. 648018



- 30717
by:

Great product just what I needed 633657



- 30717
by:

Product was just as described. Easy to use and works great. 627836



- 30717
by:

Bought a hitch & electrical components for my 2015 Cadillac SRX. Everything connected up as explained & is working great. 625275



- 30717
by:

Delivered in only a few days packaged well. Everything was there and in good shape installation video helped very much. Love the hitch I see no problems with it at all. 615986



- 30717
by:

Nice product, fair price. Thanks 615755



- 30717
by:

Happy to get this hard-to-find 7 pin to 4 pin adapter for a crew trailer. Fast shipping and great price! 613122



- 30717
by:

It is exactly the adapter I needed for my Toyota Highlander. I bought it to replace one that was damaged when I was driving off road. I buy from etrailer because I can get the exact part I need. Local supply houses did not carry this adapter. 605972



- 30717
by:

Great product. Easy to set up. Perfect for my older Chevy k20. 605400



- 30717
by:

Good deal and the perfect item for what I needed. 603809



- 30717
by:

Great product and service! 603162



- 30717
by:

Works good 600949



- 30717
by:

Great product, great price, great servi ce! 599623



- 30717
by:

Well constructed and good value. 591670



- 30717
by:

Product is good. No instructions were available, which shouldn't be a big deal but would have made me a bit more comfortable. 591122


Comments

On the product description page on our website, we have a very nice photo that explains the purpose for each wire.

-- Mike L - 12/17/2018

46810

- 30717
by:

Excellent piece to finish up a Trailer harness for my Crosstrek 590315


59
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Ask the Experts about this Tow Ready Wiring

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  • To use the Curt Echo Wireless Trailer Brake Controller # C51180 your vehicle only needs 12 volt, ground, and turn signals connected to its 7-way socket. What this means is you do not need the brake signal from the 7-way. For example, if you used a 4-to-7 way adapter such as # 30717, there will not be an output wire from the Echo to connect to, so you could simply tie that wire off, as you can see by the accompanying diagram. Apart from that the only other thing required is that your...
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  • 4-Way to 7-Way Adapter Recommendation for Installing Curt Echo Brake Controller
  • If your plan was to install a brake controller you'd have to also run the black wire of the 7-Way Adapter part # 30717 to the to the positive post of your vehicle battery as well as the ground you mentioned. The Curt Echo part # C51180 that you referenced needs the black wire to power it and then uses the other signals from the 4-way adapter to tell when the vehicle brakes are on. For a different adapter that comes the extra wire and breaker to activate the needed circuit for the Curt...
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  • How to Connect Trailer 7-Way to 2017 Toyota Highlander with Factory 4-Way
  • We have just what you need to tow your camper with your new 2017 Toyota Highlander. First, if your Coleman Popup Camper does not have electric brakes and you are only needing to power its rear signal lights, I recommend installing the Tow Ready Adapter Vehicle End # 30717. This will plug right into the 4-Way connector on your Highlander to provide a 7 pole round plug to hook up with your trailer. You will simply tie off the remaining wires from the adapter as they will not be needed...
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  • How to Select Weight Distribution System for Horse Trailer
  • For your 2018 Toyota Highlander, the Curt hitch that fits is # C13200 and this hitch is compatible with weight distribution systems. It has an 8,000 lb towing capacity and 900 lb tongue weight capacity when used with a weight distribution system, which gives us a good idea of the system you need. In order to choose the best weight distribution system you will first need to know your total tongue weight (TTW), which is the tongue weight of your fully loaded and ready to go trailer plus...
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  • Diagram of Functions on 7-Way Plug
  • I made a diagram for you which shows the function a 7-way plug for both a vehicle-side plug like what you get with the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness # HM47210 or Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717, as well as a trailer-side plug like the 7-Way Molded Connector w/ 15' Cable - Trailer End # 50-67-103 or 7-Way Connector - Trailer End # 54-77-003. I have also added a link to a help article on trailer wiring...
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  • Installing a Brake Controller on a 1996 Dodge Ram 2500 with Factory 4-Way Connector
  • The plug-in adapter that you need depends on what brake controller you have. If you don't already have one then I highly recommend the Tekonsha Prodigy P2 # 90885 as it is one of our most popular choices and has received great customer reviews. The plug-in adapter needed to install this brake controller on your 1996 Dodge Ram 2500 is part # 3020-P. Then for a 7-Way you need the Tow Ready # 30717 and some wiring. If you only need the brake controller function then you simply need to route...
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  • Brake Controller and 7-Way Installation in 1994 Ford F-150
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  • Do I Need To Extend Power Wire Of Hopkins Adapter 30717 To Battery If I Dont Need The 12V Power
  • The Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector part # 30717 does not require the black power wire if you do not have any auxiliary power needs on the trailer like you mention. You will to ground the adapter to a clean bare metal surface of the frame. If your ground on the adapter is okay, check the ground on the 4-Way connector itself. If you are still not getting power I recommend to unplug the 4-Way from the pigtail coming off of the adapter. Make sure the inside pins...
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  • 4-Way To 7-Way Trailer Connection For Use Without Trailer Brakes
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  • Converting a 4-way to a 7-way on a 2005 Ford F-150
  • You are correct, the wiring you found on your 2005 Ford F-150 is as you suspected. The blue wire is for the brake controller output and the orange wire is the auxiliary 12 volt power supply. You could use the 12 volt aux as a circuit to maintain the charge on your trailer or basically run anything else that runs on a 12 volt system such as lights. Check out the FAQ and picture I attached also. For a 7-way I would recommend you get something like a Adapter 4 Pole to 7 Pole Vehicle...
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  • How to Wire a 7-Way Trailer Connector on a Toyota Highlander Hybrid
  • In order to provide a maintenance charge through the 4 Pole to 7 Pole Adapter, # 30717, you will need to connect the black wire on the adapter to the vehicle positive battery terminal via a 40 amp circuit breaker, # PK54540. You will also need to make sure the white ground wire on the adapter is connected to the vehicle frame. The wiring from a 7-Way will provide a maintenance charge to a trailer battery but will not fully charge it. You will also need about 20 feet of wire # 10-1-1....
    view full answer...

  • Connection of Reverse Lockout Circuit to 7-Pole Vehicle End Trailer Connector
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  • Wiring for Toyota 2010 Highlander with a 7-Way connector for Towing
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    view full answer...

  • Trailer Wiring Harness Recommendation for a 2008 Honda Ridgeline
  • Yes, the CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector # C55585 is the correct wiring harness for your 2008 Honda Ridgeline. To install this kit you will basically just need to access the tail light harness on both sides of the rear of your vehicle and install the harness from the # C55585 inline with it. Check out the installation instructions I attached that detail this also. If you need a 4 to 7-way adapter for a trailer that does not have electric brakes you...
    view full answer...


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Info for this part was:

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