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Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
(459 reviews)
Price: $16.90
In Stock
Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
Item # 30717
Retail:$39.70
Our Price: $16.90
You Save: 57%Orders above $50 qualify for Free Shipping
Arrives before Christmas with Ground or Free Shipping.
In Stock, Ships Today
- All Info
- Reviews (459)
- Q & A (324)
- Videos (5)
- Photos
- Why etrailer?
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
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.
Tow Ready Wiring - Wiring Adapters - 30717 Review
Trailer Wiring Harness Adapter Installation - 2017 Jeep Wrangler Unlimited
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Trailer Wiring Harness Adapter Installation - 2011 Ford Van
Trailer Wiring Harness Adapter Installation - 1998 Chevrolet Suburban
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: Scott H.07/11/2019
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: John J.08/13/2019
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: Darrell05/17/2019
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: Darrell08/12/2018
I wanted to show the custom installation. I did not want it under the bumper 553041
- 30717
by: Reck008/28/2015
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
Tim - 01/17/2015
8683
17110
17120
by: Tim07/19/2013
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 - 01/17/20158683
Comments
Did you also use a brake controller when,yiu went from 4 to,7
-- comment by: Denise - 03/14/201617110
Comments
@Denise, Yes I do have a brake controller installed.
-- comment by: Tim K - 03/15/201617120
- 30717
by: Doug M.03/16/2015
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: Philip06/20/2018
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: Scott Fithian02/08/2018
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: Richard S.05/25/2019
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
Dave R - 07/27/2016
19729
by: Dave R06/30/2015
Was exactly what they said it was & it works great. I highly recommend them. 208488
Comments
Its a very good product
Dave R - 07/27/201619729
- 30717
Al N - 05/26/2016
18023
by: Al N.05/17/2015
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 - 05/26/201618023
- 30717
by: Chris03/21/2019
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
Cate R - 10/18/2018
44781
by: Cate R10/17/2017
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 - 10/18/201844781
- 30717
by: Manuel D.07/05/2012
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: Dan03/01/2017
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
Rics49 - 04/06/2015
10630
by: Rics4903/17/2014
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 - 04/06/201510630
- 30717
by: James H. Miller06/02/2017
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: Marty Klemm06/24/2014
There was no splicing wires, it was plug-and-play, highly recommended, very easy installation 137304
- 30717
4951
15483
by: kurt k08/06/2013
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 - 06/17/20144951
Comments
Thank you so much. Ours wasnt working either until we grounded it to car frame.
-- comment by: Sarah - 10/08/201515483
- 30717
by: roberto03/05/2013
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
Mike M - 08/26/2014
6464
by: Mike M.08/26/2013
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 - 08/26/20146464
- 30717
by: Mark10/16/2019
Just what I'm looking for. Easy conversion for any situation. 717726
- 30717
by: Luisito10/16/2019
great 717679
- 30717
by: Roxy Sanchez10/01/2019
Easy to install. After year full timing RV still working great 711368
- 30717
by: Susan08/09/2019
The part was exactly what we needed, sturdy construction and very pleased. 682680
- 30717
by: Anthony08/06/2019
This order came in very fast. Works gre at 681431
- 30717
by: Foy07/31/2019
worked great 678643
- 30717
by: Rick07/28/2019
works Great. 677512
- 30717
by: Brian07/05/2019
Works as should Quick shipping 666662
- 30717
by: Rick06/22/2019
Great stuff. Well made. Quick shipping. 661582
- 30717
by: Zoltan06/18/2019
all items as described fit perfectly easy install, shipping was quick. 660231
- 30717
by: Jeff B.06/01/2019
High quality at a great price. This site is awesome also. 651313
- 30717
by: Jason05/31/2019
Item shipped quickly and was in perfect working condition. Exactly what I needed! 650670
- 30717
by: Jason P05/28/2019
Easy to install, a year later and they still work great. 648018
- 30717
by: Robert04/20/2019
Great product just what I needed 633657
- 30717
by: Mike S04/12/2019
Product was just as described. Easy to use and works great. 627836
- 30717
by: Rick F04/12/2019
Bought a hitch & electrical components for my 2015 Cadillac SRX. Everything connected up as explained & is working great. 625275
- 30717
by: Dale passwaters04/01/2019
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: Jim03/31/2019
Nice product, fair price. Thanks 615755
- 30717
by: Broad Run Crew Inc.03/20/2019
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: Douglas02/18/2019
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: Aaron02/15/2019
Great product. Easy to set up. Perfect for my older Chevy k20. 605400
- 30717
by: Mark02/09/2019
Good deal and the perfect item for what I needed. 603809
- 30717
by: Gary02/07/2019
Great product and service! 603162
- 30717
by: Clayton01/28/2019
Works good 600949
- 30717
by: John01/23/2019
Great product, great price, great servi ce! 599623
- 30717
by: Roger12/18/2018
Well constructed and good value. 591670
- 30717
Mike L - 12/17/2018
46810
by: Brian12/15/2018
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 - 12/17/201846810
- 30717
by: Robert12/12/2018
Excellent piece to finish up a Trailer harness for my Crosstrek 590315
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Ask the Experts about this Tow Ready Wiring
Do you have a question about this 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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view full answer... - 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...
view full answer... - 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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- Since you already have the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118336 you will need to add a 7-way adapter like # 30717 to get your 7-way connection. Because your RV most likely has trailer brakes, I recommend you use the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7. This kit will give you that 7-way adapter but will also give you the wiring, connectors, and circuit breakers needed to install a brake controller...
view full answer... - Converter for 2018 Freightliner With Separate Lights
- The item that would work for you is the ModuLite Circuit Protected Vehicle Wiring Harness with Install Kit # 119190KIT. This kit has a converter that will adapt the 3-wire system on your 2018 Freightliner to work with the 2-wire system on your trailer. To make the installation easier I recommend using ModuLite Installation Wiring Kit # 118151. You would then be able to use adapter # 30717, plug the 4-way in and wire the remainder of the 7-way.
I've added links to video reviews of these...
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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...
view full answer... - 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...
view full answer... - Installing a Brake Controller on a 1996 Dodge Ram 2500 with Factory 4-Way Connector
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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...
view full answer... - Brake Controller and 7-Way Installation in 1994 Ford F-150
- To install a trailer brake controller like the Prodigy P2 # 90885 or P3 # 90195 along with a 7-way socket in your 1994 Ford F-150 the parts you'll need depend on how the truck was equipped from the factory.
If it did not come with a factory 7-way then you will need our install kit # ETBC7 as well as a 4-pole wiring harness like # 118316. If you already have a 4-pole and 4-to-7 adapter part # 30717 then all you need is the controller and a wiring kit to connect everything, part # 5506....
view full answer... - Do I Need To Extend Power Wire Of Hopkins Adapter 30717 To Battery If I Dont Need The 12V Power
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view full answer... - Which Harness do I Need For My 2004 Ford Ranger
- Thank you very much for your question, and I'm sorry about the confusion, but we shall clear things up right now. Since your 2004 Ford Ranger is already complete with a tow package and a 4 pin connector, depending if you want to use a brake controller or not to control the brakes on the trailer will determine the solution for this question.
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It sounds like the trailer you plan on towing is equipped with a 7-Way round connector. If this is not the case, please let me know.
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view full answer... - Parts Needed to Install 7-Way Connector and Trailer Brake Controller on 2015 GMC Terrain
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I have attached the written installation...
view full answer... - Installation Instructions for 4 Pole to 7 Pole Adapter part # 30717
- Part # 30717 is a universal item that can be installed on virtually any vehicle, so there are no vehicle specific instructions, but I will outline how it is done. The 4 pole connector, Green/Yellow/Brown wires, will connect to the 4 pole already on your 1999 Jeep Grand Cherokee. The Blue wire is run up the truck and connected to the brake output wire on your brake controller, usually also blue. The White wire is a ground wire and should be grounded to the vehicle frame. The Black wire is...
view full answer... - 4-Way To 7-Way Trailer Connection For Use Without Trailer Brakes
- For your specific application, you can simply connect the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector, # 30717, and mount it with # 18138. Since you don't need brakes, 12 V charging power, or reverse lights on the trailer the other wires can just remain unconnected. You can transport the trailer from point A to point B without those other wires connected. Without connecting the additional wires on the # 30717, you will still have turn, stop, and taillight functions on the...
view full answer... - Recommended Trailer Wiring and Brake Controller for 2010 Toyota Sienna
- A 4-Way to 7-Way adapter like the Tow Ready # 30717 is perfect for plugging right into an existing 4-Way like you have on your Sienna and providing a 7-Way on the other end to match up with the 7-Way on a trailer. After this simple connection, this adapter will be able to power the trailer's basic signal lights. In order to activate the 12V pin on the connector and power the trailer's electric brakes, the additional wires coming out from the adapter will need to be connected.
If you...
view full answer... - 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...
view full answer... - 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
- The Center pole on the 7-Pole connector, item # 30717, will be connected to the yellow wire. If your trailer uses the center pole for the reverse lockout on your hydraulic surge brakes then you will connect the heavier yellow wire to the reverse circuit behind the vehicle taillights. You will need to use a circuit tester, item # 40376 if you need one, to find the correct wire to splice into.
The blue wire on the 7-Pole connector is for electric brakes and is normally ran to a brake controller,...
view full answer... - Parts Needed to Add 7-Way Trailer Connector on 2016 Kia Sorento
- In order to have a fully functional 7-Way trailer connector on your 2016 Kia Sorento, you will want to install the 7-Way and 4-Way Universal Installation Kit for Brake Controllers # ETBC7. This kit includes a 7-Way blade-style connector that will work for you to connect your trailer to your Sorento. The 7-Way connector will install by plugging into your existing 4-Way connector, and the wiring needed to make the remaining connections and to install a brake controller is included with the...
view full answer... - Suitable 7-Way Wiring Harness for 2015 Nissan Frontier Pro4x
- The 2015 model year Nissan Frontier is part of the D23-series of this vehicle, which is a later generation than the 2005-2013 model years that can use the part you referenced, TowReady # 118266. This kit does not work for your Frontier.
We do offer the Curt Custom Fit Vehicle 4-Pole Wiring Harness # C55441 for your 2015 Frontier. This harness uses the connection point behind the rear bumper.
If you want to convert this flat 4-pole to a round 7-way RV-style vehicle socket you can use...
view full answer... - Wiring for Toyota 2010 Highlander with a 7-Way connector for Towing
- You will need the Curt Class III Round Tube Trailer Hitch, item # 13534, and with the tow package you will need the T-One Connector Wiring Harness with 4 Pole Trailer Connector - Toyota Highlander, item # 118449.
I would go ahead and install the 7-Way connector. We have the Brake Controller 7 & 4 Way Installation Kit, item # ETBC7, which includes everything needed to install the wiring for the 7-way connector, once you have the 4-Way installed. You mentioned a 5-Way connector and if...
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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