Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
(562 reviews)
Price: $24.94
In Stock
Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector
Item # 30717
Retail:$51.67
Our Price: $24.94
You Save: 52%
Orders above $99 qualify for Free Shipping
In Stock
- All Info
- Reviews (562)
- Q & A (0)
- Videos (5)
- Photos
- Why etrailer?
Tow Ready Trailer Wiring - 30717
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug and Lead
- 4 Flat
- 0 - 5 Feet Long
- 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 Reviews
Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector - 30717
Average Customer Rating: 4.8 out of 5 stars (562 Customer Reviews)
- 30717
Sierra K - 12/01/2021
Helpful Link
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.
Comments
Item # 18138
Mounting Bracket for 7-Way
$10.02 is the mounting bracket that works with this wiring.
-- Mounting Bracket for 7-Way
$10.02 is the mounting bracket that works with this wiring.
Sierra K - 12/01/2021Helpful Link
- 30717
by: Christopher01/13/2022
Installed the wiring harness for 2021 Toyota Tacoma. Everything went together just as noted in the instruction.
- 30717
by: James01/22/2022
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!
- 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!
- 30717
by: Paul06/12/2021
I really appreciate you following up on my order. The information and videos will help when I drop the harness and circuit breaker off at my local shop. When I went to them originally with my problem I couldn't answer all their questions. With the parts in hand they should be able to convert my four prong to the seven prong plug used on my new trailer. Thanks also to Craig at CampInn for directing me to your site and the parts they are using in the construction of my trailer.
- 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.
- 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.
- 30717
by: Gina12/02/2021
Yes, very nicely designed wiring harness. Works Great....
- 30717
by: Richard09/25/2021
Kyle was extremely helpful in not only finding the right hitch but the accessories I needed to go with it. Would definitely recommend etrailer.com to all my friends. Prices were excellent too!
- 30717
by: Timothy10/04/2021
Worked as intended - wished they included a wiring diagram for us trailer newbies.
- 30717
by: Paul10/05/2021
Super Service at ETrailer - I have never had an issue with the help provided or with any product
- 30717
by: Marty Klemm06/24/2014
There was no splicing wires, it was plug-and-play, highly recommended, very easy installation
- 30717
by: Eno09/06/2021
Well constructed and sturdy! Nice, standardized 4 pin connector, other pins from 7 pin connector easily accessible.
- 30717
by: Roger10/24/2021
Great product! Great instructions. Easy to install..
- 30717
by: kennth09/28/2020
Every time etrailer has provided me with the needed wiring!
- 30717
by: Lyndall11/19/2021
It was easy to install end it has worked very well
- 30717
by: Niv01/21/2022
Had a great experience ordering from etrailer. Product arrived fast and customer service was excellent.
- 30717
by: Darrell08/12/2018
I wanted to show the custom installation. I did not want it under the bumper
- 30717
Laura E - 02/10/2017
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!
Comments
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.
-- Laura E - 02/10/2017
- 30717
Rics49 - 04/06/2015
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.
Comments
Im still enjoying this product, Ive used it several times, still workingwell
Rics49 - 04/06/2015
- 30717
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.
Comments
Had the same issue with the ground kurt. Almost gave up on it until I read your post. Thanks.
-- comment by: mike g - 06/17/2014Comments
Thank you so much. Ours wasnt working either until we grounded it to car frame.
-- comment by: Sarah - 10/08/2015
- 30717
Al N - 05/26/2016
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.
Comments
could not be happier with the purchase that I made
Al N - 05/26/2016
- 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.
- 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.
- 30717
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!
32
577
Show More Reviews
Ask the Experts about this Tow Ready Trailer Wiring
- Plug and Play 7-Way Trailer Connector for 2018 Ford F-150To install a 7-way on a 2018 Ford F-150, you'd use the Curt # C56413 which installs as shown in the linked video.
view full answer... - 4-Way to 7-Way Adapter Recommendation for Installing Curt Echo Brake ControllerIf 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...
- Installing 7-Way Connector and Brake Controller on my 2014 Audi Q5If you currently have a working 4-Way plug then using the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation Kit part # ETBC7L kit is a great way to get a powered 7 Way connector on the rear of your 2014 Audi Q5. You can use the Curt No-Drill Bracket part # C57202 to attach the 7-Way to. The bracket will mount around the tube of your hitch and really does a great job staying solid. With this kit using the Curt Echo part # C51180 is an easy way to add a brake controller that...
view full answer... - 2018 Toyota Sienna SE 7 Pole Trailer WiringYou have a couple options for your 2018 Toyota Sienna SE, the one that I recommend is getting the Hopkins wiring kit # HM11143495 because it will work with the SE SUB model Sienna. The kit you were looking at # TK87FR is not supported by the SE model. Yes, the Hopkins kit is just a 4 pole connector, but your can get an adapter like # 30717 you will be ready to haul! If you wanted to go the universal route, get the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way...
view full answer... - Easy to Install Brake Controller Recommendation for 2017 Toyota Highlander with 4-WayI have a perfect brake controller solution for what you are wanting that is super easy to install and also performs really well. For that I highly recommend the Curt Echo Mobile part # C51180 as this basically just plugs into an active 7-way which I have an easy solution for your 2017 Toyota Highlander and once synced to your smart phone is ready to be used. It offers proportional braking which means it senses how hard you are applying the brakes of your Highlander and applies the trailer...
view full answer...
- Can Redarc BCDC Charger Be Used with 7-Way Connector to Charge Trailer BatteryThe Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1225D that you referenced could physically be installed so that it uses 12V power from the 7-Way connector on your truck, but it's not going to allow for ideal operation. The problem is that typical trailer connectors use smaller 10 gauge wiring that just isn't capable of allowing enough power to pass through to really charge a battery up. Since this is exactly what you would want to use the BCDC charger for, using it with the 7-Way...
view full answer... - Will Curt Echo Allow Trailer Battery to Be Charged During TravelThe Curt Echo Trailer Brake Controller # C51180 won't itself provide any charge to your trailer mounted battery, but you certainly can still have a 12V power wire ran from the 7-Way to the battery for this purpose with the Echo in place. The Echo will not interfere with this circuit. When installing the 4-Way to 7-Way Adapter like # 30717 on your Highlander please note that you will still need to run the black power wire up to the vehicle's battery using some 10 gauge wiring # 10-1-1...
view full answer... - Trailer Wiring and Hitch that Fits 2011 Volvo XC90For a 4-way US style trailer wiring harness the part # 118411 is the best option that is the easiest to install and the most reliable converter box. The Draw Tite hitch part # 75152 is a really great option to. It's a confirmed fit and it gives you a mostly hidden appearance as well. I attached an install video for it as well.
view full answer... - Recommended 6-Way Wiring Harness for 2013 Chevrolet ImpalaI would be happy to help you. The connector on your 2018 Aspen camper is a 6-way connector. In order to get a 6-way connection on your 2013 Chevrolet Impala you will need to start with a 4-way. For a 4-way, I recommend the # 118417 T-One Vehicle Wiring Harness from Tekonsha. This is a custom fit wiring harness and plugs directly into connection points behind the passenger's-side tail light. For the 6-way connection, you want the # ETBC6 Universal Installation Kit. This includes all of...
view full answer... - What Tow Hitch and Wiring Harness Will Fit My 2022 Hyundai PalisadeThe hitch I recommend for your 2022 Hyundai Palisade is the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C13427. I recommend this Curt hitch because it has a hidden design, meaning that all you will see is the receiver tube opening. For the wiring harness, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # 118784. I recommend the T-One because it's one of the most reliable harnesses on the market. To get the 7-pin, you will need the Adapter...
view full answer... - What Size Fuse/Breaker is Needed On Power Wire of 4 to 7-Way Adapter for Curt EchoThe Curt Echo Wireless Trailer Brake Controller part # C51180 will work with pretty much any 4 to 7-way adapter like the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector part # 30717. The black wire on said adapter would need to be attached to the vehicle's battery but I do recommend a higher rated 40 amp fuse/circuit breaker, part # 9510. The 4-pole converter harness would not have an affect on the brake controller.
view full answer... - What to do With the Extra Wires on 4 to 7 Pole Adapter for a Camper TrailerOn the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector, # 30717, the extra wires can be taped off, tied up with a cable tie, and tucked out of the way if not in use. I would attach the white ground wire to an existing grounding point or the vehicle frame even if you do not intend on adding a brake controller (which is what the other wires are for). You would then attach the vehicles 4-Way into the 4-Way end of the adapter and plug your trailer connector into the 7-Way for lights...
view full answer... - Poor Ground Connection Causing Both Trailer Turn Signals to BlinkThe symptoms you mention are typically caused by a poor ground connection, either at the trailer connector on the vehicle, the connector on the trailer or at one of the trailer lamp's grounding points. Make sure that the ground wire of the Tekonsha # 118791 is securely attached to the vehicle frame or chassis. I like to place a star washer between the vehicle surface and the ring terminal, the washer will bite into the metal for a secure, reliable connection. The same goes for the main...
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... - Where to Find Brake Output Circuit of 2006 Ford F-150 with 4-WayYou have to look at the driver side frame rail for the wiring needed to connect to the blue wire of the # 30717 that you have. I attached a couple pictures that show what you are looking for.
view full answer...
- Wiring for 2013 Mercedes Benz Sprinter to Connect to Trailer's 7-WayIn order to connect to your trailer's 7 way, you would first need to install the T-One Vehicle Wiring Harness # 118650. This will plug into the wiring harness behind the tail lights on your 2013 Mercedes-Benz Sprinter. From there, you would simply add the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717, which would allow you to connect to your trailer's 7-way. I have added a link to an install video for you to take a look at which demonstrates the process. If you needed...
view full answer...
- Adding a 7-Way Connector to a 2001 Toyota SequoiaThe 2001 Toyota Sequoia with factory tow package would require you to first plug in a 4-way such as # C55246 as you can see from the accompanying photo. From there you would be able to add a 7-way with adapter # 30717, which will plug into the 4-way. I've added links to video reviews of these parts for you to take a look at.
view full answer...
- Adding a 7-Way Trailer Connector and Brake Controller to a 2003 Toyota Tacoma with 4-Way ConnectorIt does sound like a 4-Way flat was added to your 2003 Toyota Tacoma. But that is a good thing because it will be needed to install the 7-Way. To add the 7-Way (if using an in-cab brake controller) you will need installation kit # ETBC7. This provides the 7-Way, still retains the 4-Way as well, and has the wiring and accessories needed to install the brake controller. I have included some links to the right that show and explain this installation for you. For a brake controller I recommend...
view full answer... - Trailer Wiring Harness Recommendation for a 2008 Honda RidgelineYes, 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... - Brake Controller Installation Wiring On 2016 Chevrolet Express VanSome models of the 2016 Chevrolet Express Van have the brake controller connection wiring taped and tucked under the driver side floor mat up towards the firewall, which sounds like what you have especially since they are labeled as such. The brake controller bundle is pre-wired to the vehicle's battery, stop light switch and the wires should be extended to the back of van to wire in a 7-way. This bundle's wires connect to the pig tail from the brake controller part # 90195 by function. I...
view full answer... - Parts Needed to Get Prodigy RF Brake Control to Work on 2007 Toyota FJ Cruiser with 4-Way ConnectorSince your 2007 Toyota FJ Cruiser already has a 4-Way installed you will just need a 4 to 7-Way adapter, a 40 amp circuit breaker, and some wire. You only need the light functions and the 12 volt circuit to work on the vehicle side 7-Way in order for the Prodigy RF, # TK94FR, to function. For a 4 to 7-Way adapter you can use # 30717 that you mentioned. The white wire will need to be ground to the frame and the 4-Way plugged into it. That leaves 3 more wires. The black wire is the power...
view full answer... - Brake Controller Installation Instructions and Wiring Needed for a 2005 Dodge Ram PickupWhen installing a brake controller on your 2005 Dodge Ram truck, you will need the brake controller wiring harness that you mentioned for Dodge trucks, item # 7894. This harness is spliced to the like colored wires coming out of the back of the Tekonsha Prodigy P2 Electronic Brake Controller, item # 90885 that you mentioned. This brake controller normally does not have a connector on it unless it has been wired previously. If this is the case you will need to remove the connector and replace...
view full answer... - Setting Up a 2009 Ford E-350 Van without Factory Towing Package for Brake Controller WiringThere are 3 options from the manufacturer for the 2009 E-350 Ford Van. Factory 7-Way trailer wiring, factory 4-Way trailer wiring, and no existing trailer wiring. I will go over all three since you did not indicate which one your vehicle has. If you have the factory 7-Way trailer wiring, you will be able to use the 3034-P wiring harness that you selected to easily install your prodigy brake controller. When looking for a port under the dash, it will be near the top of the instrument cluster,...
view full answer... - How To Get Camper Lights Working Using Tow Ready Adapter # 30717 on 2005 Volvo XC90 With 4-WayFirst, on the # 118411 wiring harness you installed on your 2005 Volvo XC90 check the 4-Way connector with a circuit tester like, like part # 40376, to make sure the 4-Way is working correctly. If it is not, check to make sure you have the white wire from the wiring harness attached to a good ground and the yellow power wire from the converter box installed to the fuse box on your vehicle correctly with a good fuse installed in the fuse holder. I am including a link to a video that will...
view full answer...
Do you have a question about this Trailer Wiring?
Why etrailer.com?
At etrailer.com we guarantee:Highest quality trailer wiring for the best price.
Our Lowest Price Pledge ensures you will never overpay for the parts you need.Real product know-how.
We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.Most detailed, accurate trailer wiring information available.
Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.Installations, made easy.
We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.Fast shipping.
Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.Personalized service for life.
We provide one-on-one, personalized service from the ordering process through the life of your product.Trusted since 1946.
We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.Returns Policy
Need to return an item? No problem. Please read our Returns Policy for more information.
Info for this part was:
Test Fit:
Joe V
Test Fit:
Robert C
Test Fit:
David F
Expert Research:
Mike L
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Reno H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Lori W
Expert Research:
Jeffrey L
Video by:
Andrew K
Video by:
Alan C
Video Edited:
Joshua S
Video Edited:
Dustin K
Video Edited:
Chris R
Updated by:
Laura H
Updated by:
Wilson B
Updated by:
Alexander C
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Product Experts Available Now!
Call 800-298-1624
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.