Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
(592 reviews)
Price: $29.47
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- Reviews (592)
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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 (592 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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.
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.
by: ChiefHart12/09/2016
This RV receptacle works great for my set up. Most of the wires hooked to the Curt wiring harness connector. I installed a two wire cable from this to the front for 12Vddc and Electric brake control. I also hooked to my backup light to provide for my trailer back-up lights (LED).
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.
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See what our Experts say about this Tow Ready Trailer Wiring
- 4-Way to 7-Way Wiring AdapterI would recommend the 4-way to 7-way Adapter, part # 30717. Keep in mind that although you will have lighting functions, the electric trailer brakes will not work unless the lead on the adapter for the brake output is installed to a brake controller.
view full answer... - Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector InstructionsSorry about that, I'll be happy to help! When connecting the adapter, (4 Pole to 7 Pole Vehicle End Trailer Connector), the white wire is your ground wire, the black is the hot wire to the 12V, the blue wire is to the electric brakes, and the yellow wire is for reverse. The 4 pole just plugs into the existing 4 pole.
view full answer... - Recommendation to Connect 7-Way on Trailer to 4-Way on 2016 Ford F-150If you are only needing to power the trailer's signal lights (not electric brakes or any other function), you will just want to install an adapter like the Tow Ready # 30717. This will plug right into the factory 4-Way on your 2016 F-150 and provide a 7 pole round plug to connect to your trailer. This will allow all of the rear signal light functions on the trailer to work as they should in correspondence with your truck. The extra wires can simply be tied off. I have included a short...
view full answer... - Troubleshooting Trailer Running Light Circuit Not Working Using 4-Way to 7-Way AdapterSounds like the running light circuit of your trailer wiring is currently not working which is the circuit on the brown wire. This may be the adapter's fault but typically it's corrosion on trailer wiring pins that causes this type of problem so take sandpaper to the pins on the 4-way of your tow vehicle and the pins of the trailer's 7-way. If that doesn't work make sure the running light circuit along the trailer wiring is intact without any cuts or exposed wires and make sure the grounds...
view full answer... - Testing Wires On a 1994 Jeep Grand Cherokee to Determine Functions to Install a Trailer ConnectorYou cannot go by color because there is no standard for colors. You have to go by function only. To do this you will use a circuit tester like # 3808 and test the vehicle wires one at a time while someone sits in the vehicle and runs through all of the light functions. Then you can wire it all up following the functions (not colors) in the diagrams in the FAQ I have linked. On the trailer side, I assume the connector is fine. If the trailer is new then white is likely ground, brown is...
view full answer... - All Trailer Lights Blink with Turn Signals Engaged The issue you described sounds like a ground problem as is the case for most sporadic lighting functions. In order to fix this you will first want to start with the lighting assemblies. They will either ground through a single wire or the mounting hardware. Regardless, you will want to remove either and sand down the surface before attaching. Once this is done you will then need to do the same with the trailer connectors for both the vehicle side and trailer side. Repeat the above process...
view full answer... - What Type of Trailer Wiring Would 2017 Jayco Sport 10SD Have On itIt was somewhat hard to see in the pictures I found of the camper online but I was able to see a 4-way so you should be good since your Highlander has one. You might contact the dealer and verify before you drive as the owner could have installed a 7-way in place of that. In that case a simple 4-way to 7-way adapter part # 30717 would be an easy adapter to bring with you just in case.
view full answer... - Converter Recommendation to Go from Truck 4-Way to Trailer 7-WayFor converting from a 4-way on a vehicle to a 7-way on a trailer the part # 30717 is the correct adapter to use. For just taillight functions you would not need to also run the extra ground wire. All you'd need to do is attach the two 4-ways together.
view full answer... - What is the Yellow Auxiliary Wire for on 4 pole to 7 Pole Adapter from Tow Ready Part 30717The black wire is the 12V hot power source that is usually used to maintain a trailer battery. The yellow wire, in some cases it is orange or purple, is for the center post which is usually wired for reverse lights or a reverse lockout on a boat trailer. If you do not need a reverse circuit, you can just tape the yellow wire up and out of the way.
view full answer... - Where is 12 Volt Accessory Circuit for 7-Way Wiring on 2014 Ford F-150You would not need a second battery or a second battery line to have the 12 volt accessory circuit of the 7-way on your 2014 Ford F-150 active. The 1:00 pin of the 7-way would already have this ready and available. If you were using a 4-way to 7-way adapter like the # 30717 that you referenced the 12 volt circuit is already present at the rear of the vehicle.
view full answer...
- Trailer Running Lights Not Working when Connected to 4-Way on 4 and 7-Way Trailer ConnectorThe trailer connector you are using on the vehicle needs to be grounded and the connector on the trailer has to be grounded as well. All of the lights also need to be grounded. This does sound like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside...
view full answer... - Does the Brake Output and 12 Volt Accessory Wires of the 4-Way to 7-Way Adapter Need to Be RunIf your trailer does not have trailer brakes and all you need are taillight signals you would not need to run any additional wire to install and use the # 30717 on your vehicle. Just plug in your 4-way and you would be good to go.
view full answer... - Trailer Lights Only Work Fine when Tow Vehicle Headlights are OffThis sounds like a ground problem. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean...
view full answer... - Solution for Trailer Lighting Circuits that Have the Brightness SwitchedYou have the circuits backwards on the taillight assemblies. Try switching the two circuits you have for each light assembly that have the stop/turn and the running light and you'll see the circuits work like they should.
view full answer... - Trailer Lights Only Work With Headlights OnIf your trailer lights only work when the headlights are on, the issue is likely related to the running light circuit of your trailer wiring. Often an intermittent connection results due to corrosion on the trailer wiring connectors and cleaning them will take care of the problem. Another consideration is a weak ground on your trailer wiring. An insufficient ground can sometimes cause erratic trailer light functions. You would want to improve the connection of the main ground wire on...
view full answer... - How to Determine the Amperage on the 12 Volt Power Circuit in a Trailer ConnectorThe amperage on the 12 volt power circuit will depend on the amperage draw of the item receiving the power on the trailer. When aftermarket 7-way trailer connectors are installed on vehicles, it is recommended to have a 40-amp circuit breaker inline on the power wire going from the trailer connector to the battery. If your truck has factory trailer wiring, there will be a fuse in the fuse box designated for that circuit. You can check your owners manual to see the names and locations of...
view full answer... - Troubleshooting 4-Way to 7-Way Adapter Where Circuits aren't Active But 4-Way Is GoodSounds like maybe the ground wire isn't connected properly if you are plugging in a known working 4-way to the # 30717 and you can't get the functions to work even with a tester. I'd make sure the white wire is connected to a clean metal surface on the vehicle frame and try again.
view full answer... - Recommendation For Adapter For 4-Pole To 7-Pole Vehicle End Trailer ConnectorI have a great option for your situation. The Tow Ready Adapter 4-Pole to 7-Pole Vehicle End Trailer Connector, Item # 30717, will give you the ability to connect your vehicle to the trailer as well as the option to use only the functions you need. For any functions you are not using, simply tape up those wires in a bundle and store them away. After that, connect the ground, mount the connector, and your are good to go. I have attached a video for you to check out.
view full answer... - Finding a Ground Location for a Trailer Wiring Harness on a Kia OptimaYou may need to scrape away some undercoating on the bottom of the vehicle in order to get a bare metal surface. Any surface with coating or paint will need to have those materials removed in order to get a good ground connection. Usually behind a tail light assembly there is some bare metal. You can also look for other wiring harnesses nearby and ground it in the same location.
view full answer... - Can a Adapter 4 Pole to 7 Pole Be Used Just for Tail Light FunctionsYes, you could use this Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717 to adapt from a 4-way to a 7-way. You could simply tie they wires you would not use up and out of the way and you would be fine. You will still need to ground the white wire though. I attached an installation video for this product for you to check out also as well as an FAQ on trailer wiring for you to check out.
view full answer... - Recommended Wiring Connection Adapter for Jeep 4-Pin to Trailer 7-PinIf all you want to do is go from the 4-way trailer connector to the 7-way without adding functions, all you need to do is use an adapter like # 30717. You will simply plug in the 4-way and then connect the white ground wire with ring terminal to your vehicle frame. The ground needs a bare metal to metal connection free of debris and corrosion. The other three wires on the adapter can be left disconnected. The only thing to double check since you have a boat trailer is that you don't...
view full answer... - Can Ground Strap from 4-Way to 7-Way be Ran to Hitch and WorkThe ground strap of a 4-way to 7-way adapter like the part # 30717 that you referenced can be ran to the hitch of a vehicle as the hitch is connected to the frame. We normally don't recommend this though as typically drilling into the hitch crosstube will void the warranty of it.
view full answer... - 4-Way Vehicle to 7-Way Trailer Adapter for Tow Vehicle without Brake ControllerThe part # 30717 would be a great solution. It would plug into your vehicle 4-way and give you a 7-way for your trailer to connect to.
view full answer... - How to Determine Wiring Functions of Trailer When Trailer Uses Non-Standard ColorsThe trailer wiring colors you mentioned are the standard colors that trailer use. Green being right turn/stop, yellow being left turn/stop, brown being running lights, and white being ground. So the easiest way to determine what your trailer wires control is to take a jumper wire from a 12 volt power source like a positive terminal on a vehicle battery and apply it to each of the wire colors. That will tell you which circuit they control. If you get a spark when you touch the wires that's...
view full answer...
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Bruce
3/23/2023
its working well, no issues.