Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
(593 reviews)
Price: $33.65
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- Reviews (593)
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- Videos (6)
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Tow Ready Trailer Wiring - 30717
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug and Lead
- 0 - 5 Feet Long
- 4 Flat
- Tow Ready
- 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.
Video Transcript for Tow Ready Wiring - Wiring Adapters - 30717 Review
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- Product did not meet expectations
Customer Reviews
Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector - 30717
Average Customer Rating: 4.8 out of 5 stars (593 Customer Reviews)
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!
by: Bruce03/22/2022
i had to replace these two items as my dear daughter went down our goat path driveway too fast. they replaced the originals from etrailer from the prior year. shipping is timely and customer service actually helps! i wired from battery to controller to hitch myself, and everything fit.
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.
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.
by: Cory B10/01/2013
This 7 point harness wired right in with my T1 connector and is great for hooking up to my camper, very easy to install!
by: James 01/22/2022
Joe at etrailer was able to provide this solution and saved me literally hundreds of dollars to have a reputable place put in a new harness onto my AWD MKX. Thank you!
James
1/23/2023
The adapter worked out perfectly. And now after almost a year no issues whatsoever.
by: Marty Klemm06/24/2014
There was no splicing wires, it was plug-and-play, highly recommended, very easy installation
by: Darrell08/12/2018
I wanted to show the custom installation. I did not want it under the bumper
by: SAS LTD12/23/2022
The staff is very friendly. I would have awarded 5 stars but there was a shipping issue. They did get me all the parts I ordered, with simple communication, a couple pictures and minimal frustrations I got everything over two shipments. It took a little longer to get everything then anticipated. They deserve 4.5 stars not just a 4. I will do business with them again and I do recommend them. Will be ordering a receiver hitch through them this spring.
by: Laura 03/05/2023
Works great! Remember to ground it to: 1) tow vehicle frame, or 2) directly to tow vehicle negative terminal. Do not ground it trailer frame because you need to complete the circuit to the tow vehicle battery.
by: Zach O02/03/2017
Works great. Easy install.
It's more sensitive to dirt than I expected, but that might be common to all trailer connections, I don't know. I noticed on a trip that my brake controller said NC (no connection), and I didn't have trailer brakes, which meant my blinkers probably hadn't been working, either. I got pretty worried, and looked at it and only saw just a little black gunk on one blade. But cleaning that small amount of black gunk off solved the problem.
So far, so good!
Laura E.
2/10/2017
Thanks for your business and your review, Zach! Using dielectric grease like 11755 on your connections increases reliability and the life of the connection by preventing corrosion and sealing the connection.
Helpful Links
by: Carl m01/13/2018
I bought this because I hated the flat four pole that just hung over the bumper. Drilled a 1 7/8 inch hole in my bumper with bimetal hole saw. Mounted nice and clean. Be sure to hook up the White ground wire to your frame. The ground wire from the flat four does not pass thru this connector. Also if need be you can still pull a trailer with a flat four pole just by unpluging it
Carl M.
1/13/2019
It’s a year later. Still working great no problems
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.
Mike G.
6/17/2014
Had the same issue with the ground kurt. Almost gave up on it until I read your post. Thanks.
Sarah
10/8/2015
Thank you so much. Ours wasnt working either until we grounded it to car frame.
by: Raymond 01/12/2023
Wiring harnesses will simplify the job I'm doing glad that I found these products and I also had a good experience dealing with etrailer they keep you informed about shipping and the products are ship fast. Thank you
by: B Kelly08/07/2017
Hitch was as advertised. The printed instructions made it a breeze. Took about an hour with me and an experienced mechanic. The light kit took a little longer than expected but was installed inside the car vice behind the lights like the video showed. Towing a camper this weekend, not expecting any issues.
B K.
8/10/2018
All is well. Don’t use it that often but when I needed it they’ve been there. I’ll use etrailer from now on.
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.
Rics49
4/6/2015
Im still enjoying this product, Ive used it several times, still workingwell
by: Ben B. 10/18/2016
The website was extremely easy to use especially with the feature to pick my vehicles connection and my trailers connection. My purchase arrived very promptly and the customer service was excellent. The adapter works perfectly and I will definitely shop from etrailer again.
Ben B.
10/19/2017
I appreciate the follow-up. I must say that your company has provided an excellent customer service experience for me. I wish more companies cared as much. The product still works great. I use it when towing my trailer regularly.
by: MTKruger03/24/2014
We only discovered this site recently and LOVE it. You don't have to know what you want, the questions lead you to exactly what you are needing. The item is of great quality, and as described. We can now swap from truck to jeep with our trailer, and simply without effort.
We have found our new 'to go' store for our trailer shopping. Customer Service by the way, terrific, great communication, and very quick shipping. Really Great Experience, Highly recommend.
Mtkruger
3/24/2015
Weve moved in the past year, our new home 250 miles away from our old one. We used the hitch a lot, did I say a lot? daily round trips, never had a single problem with it. Worked like a champ. Thanks
by: Paul 10/05/2021
Super Service at ETrailer - I have never had an issue with the help provided or with any product
Paul
10/5/2022
Was easy to install. Fit perfect. Has stayed looking great. It is great having a mounting bracket for the electrical hookups. It keeps the 7pin more out of the way and more solid.
by: DavidR02/05/2023
Works great to get the 7 pole connection that I needed for my trailer.
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.
Al N.
5/26/2016
could not be happier with the purchase that I made
by: Scott 10/18/2022
Every phone encounter I’ve had with etrailer has been excellent. Their staff on the phones know their stuff and they have most every rv/trailer accessory known to man. The seven pole side is much more robust than the four pole side, which I leave connected all of the time. Problem solved
by: Bill03/26/2016
This adapter also went well , be aware it did not come with the mounting plate ,be sure and order the mounting plate at the same time , as I had to get mine after the fact , in all honesty it was my mistake .Unless this is a repair replacement you will need the plate to install this item .
Bill
2/20/2018
Hi ! The products are working just dandy
by: Bruce11/15/2021
Average quality part, would be nice to include a mount but ended up going the extra mile and used a hole saw to install it in my van’s bumper out of harms way. Would be easily damaged if mounted near the hitch.
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Bruce
3/23/2023
its working well, no issues.