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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
Our Price: $33.65
Trailer Wiring
Shipping Weight: 0.49 lbs
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30717 - 4 Flat Tow Ready Wiring Adapters
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Great Prices for the best trailer 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 1-800-940-8924 for expert service.
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  • Reviews (593)
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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

Wiring diagram

Product detail


20321 Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector




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Customer Satisfaction Score:


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:

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:

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.

Bruce

3/23/2023

its working well, no issues.



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.



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.



by:

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:

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:

Every time etrailer has provided me with the needed wiring!



by:

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



by:

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



by:

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:

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:

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!

Etrailer Expert

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.



by:

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:

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:

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:

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:

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:

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:

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:

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:

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:

Works great to get the 7 pole connection that I needed for my trailer.



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.

Al N.

5/26/2016

could not be happier with the purchase that I made



by:

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:

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.

Etrailer Expert

Sierra K.

12/1/2021

Item # 18138 is the mounting bracket that works with this wiring.


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Show More Reviews

See what our Experts say about this Tow Ready Trailer Wiring

  • Does Ground Wire of 4-Way to 7-Way 30717 Need to Be Ran if Just Used for Turn Signals
    If you were going to only use the # 30717 for turn signal functions the extra white wire does not need to get grounded. It won't hurt anything to have it ran to a ground but it's really only needed if installing a brake controller or if you connect the 12 volt accessory circuit.
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  • How to Determine if Older Camper is Equipped with Electric Brakes
    I really can't be sure if your 1980 Serro Scotty Camper M-18 is equipped with electric brakes. The only way to know this for certain will be to simply look at the hubs to see if drums and brake assemblies are installed. If it is wired up for brakes, you should also see a couple wires coming out from each brake assembly on each side of the axle. It sounds like you are just trying to figure out how to wire the 4-Way to 7-Way adapter like the Tow Ready # 30717 on your tow vehicle. This will...
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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. What...
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  • Can I Charge My Trailer Battery Using 7-Way Trailer Connector on Truck
    You would not be able to charge your battery through the wiring on your 4-way trailer connector. Since your truck has a 7-way connector, you could maintain the power to the battery but not charge it. To begin, you would need to cut off your 4-way trailer connector and install a 7-way connector on the trailer like the Optronics 7-way, part # A7WCB. You would need to connect the appropriate wires. White is ground, Yellow is left turn and brake, Green is right turn and brake, and Black is...
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  • Trailer Running Lights Not Working when Connected to 4-Way on 4 and 7-Way Trailer Connector
    The 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...
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  • How to Wire LED Tailgate Light Strip to Running Light Circuit on 2009 Chevrolet Silverado
    For your LED tailgate light strip to function when your headlights are on it must be connected to the running light circuit wire and of course be grounded, either to the vehicle frame or to the white ground wire in your trailer wiring. In a 7-way the running light circuit is carried on the wire that leads to the contact at the 11:00 position as you view the socket. The ground wire connects to the pin at the 7:00 position. Please refer to the photo I linked for you. You can ground the light...
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  • Installing Battery Charge Line on Motorhome and Towed Vehicle to Maintain Dinghy Battery
    The Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25 is a great help for your 2012 Honda CR-V especially because your Patriot brake unit will be drawing power. To utilize this you will need power from your motorhome as well using the Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75. Since you only have a 4-way on your motorhome and vehicle, you will need a different connection. I recommend using the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector...
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    Image 1 for Image 2 for
  • Why Would Trailer Wiring Stop Working When Headlights Come On
    Try improving the connection of the main ground wire of the trailer wiring harness on the trailer. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to the main ground. This is actually the ideal solution. But you can also check the current grounds for the lights to make sure they are making a solid connection to a clean metal surface. What you described is the classic insufficient ground scenario so finding a way to improve the grounds will...
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  • 7-Way Recommendation for a 2009 Toyota Sienna
    You would first need to start with a 4-way if you do not have one. For that you would want the part # 118304. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2...
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  • Recommendation to Connect 4-Way Flat to 7-Way Connector on Trailer with Brakes that Won't be Used
    If you don't actually need to power the trailer's brakes, and just need to connect to its 7-Way so you can power its basic signal lights, then you can use the Tow Ready Adapter # 30717. This will plug right into the 4-Way flat on your tow vehicle and provide a 7-Way on the other end to hookup with the trailer. You will ground the white wire to a clean, bare metal surface, but the remaining wires coming out of the harness won't be needed so they can just be tied off. I have attached a...
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  • Replacement Trailer Connector on a Boat Trailer with a 4-Way Flat but 5 Wires
    You have what is called a wishbone harness. The running light circuit is split at the connector. This is so you do not have to run a jumper wire from the running light on one side over to the other side. For a replacement you can use # A35W42B. A wishbone harness will work just fine with a standard 4-Way flat harness on your vehicle.
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  • How To Get Camper Lights Working Using Tow Ready Adapter # 30717 on 2005 Volvo XC90 With 4-Way
    First, on the # 118411 wiring harness you installed on your 2005 Volvo XC90 check the 4-Way connector with a circuit tester like, like part # PTW2993, 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...
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  • Adapter Recommendation for Vehicle 4-Way to Charge Trailer Battery
    Yes, the Adapter part # 30717 would work for both vehicles you have so that you can run a charge wire to your vehicle battery. To complete the 12 volt circuit you will need to run a length of 10 gauge wire like part # 10-1-1 (sold by the foot) through a circuit breaker like part # 9510 to the positive terminal of your battery. The rest of the wires would need to be just taped up and secured out of the way.
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  • Recommended Wiring Connection Adapter for Jeep 4-Pin to Trailer 7-Pin
    If 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...
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  • Lamp Out Warning Light Comes on with Headlights on and Left Turn Signal Engaged
    Is this only happening when towing a trailer? If so it could be a few different things. First, if the trailer has LED lights the low power draw of the LED lights could confuse the vehicle computer. To simulate more load you would add a load resistor, # DI34ZR to any affected circuit. It could also be a poor connection caused by dirty or corroded trailer connectors. Make sure that the vehicle and trailer side connectors are clean and free of corrosion inside and out. Also make sure that...
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  • Using Prodigy RF Trailer Brake Controller on a Camper Trailer with Battery
    I suspect you are using a 4-pole to 7-pole adapter on your 2004 Honda Pilot, such as TowReady # 30717. You will need to run only one 12V power wire to provide both power to operate the Prodigy RF and battery charging current for your trailer battery. You will need a 40-amp circuit breaker and 10-gauge wire for the 12V feed to the 7-way on the Pilot. You can use circuit breaker # PK54540 from Pollack, which features a continuous cycle with an automatic reset; and for the power wire you...
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  • What is Needed to Install Tekonsha Primus IQ Brake Controller on 2010 Jeep Wrangler Unlimited
    To install the Tekonsha Primus IQ Brake Controller, # TK90160 on your 2010 Jeep Wrangler Unlimited with factory 4 way tow package, you will need the wiring installation kit # ETBC7. This will include everything you need to install both the brake controller and a fully functional 7-way connector to hookup to your trailer. The 7-way connector will provide a wire for your camper's battery as well. The 4 Pole Adapter # 30717 that you referenced in your question will work for simply converting...
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  • Can Redarc BCDC Charger Be Used with 7-Way Connector to Charge Trailer Battery
    The 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...
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  • What Circuit on Trailer Wiring Power the Interior Lights of a Trailer
    The lights in your trailer would be either powered by a battery or from the 12 volt accessory circuit of the 7-way. If you didn't connect this circuit and the lights aren't working then you will need to run a length of 10 gauge wire like part # 10-1-1 (sold by the foot), to the 12 volt circuit of your 7-way up to the positive terminal of the battery through a breaker like part # 9510.
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  • Will Curt Echo Allow Trailer Battery to Be Charged During Travel
    The 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...
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  • Will 2014 Hyundai Santa Fe 4-Way Connector Provide Charge to Trailer Battery Through 7-Way Connector
    Running a 12 volt power circuit on your 2014 Hyundai Santa Fe would allow you to maintain the trailer battery but would not provide a way to charge the battery. As for the 4-way, this will only provide power for the lights and signals on your trailer. In order to actually charge the battery you will want to use a battery charger connected to a 110 outlet.
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  • Installing a LED Light Kit on a 2011 Acura MDX
    No worries and thanks for entrusting etrailer! To power the lights # 98174LED, you will need a 4-Way wiring harness on the vehicle. If you need one, use T-One harness # 118424. It plugs directly into existing wiring. The connection point or plug in connector is located in the rear cargo area. I included an instruction link showing you the step by step directions. If you need a 4-way to 7-way adapter (if you already have a 7-way on your MDX) then the Tow Ready # 30717 will suffice. I...
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  • Vehicle 4-way Flat Connector to Trailer 7-way Connector Adapter
    The adapter we offer for a vehicle with a 4-way flat to tow a trailer with a 7-way blade is a connector like # 30717. Using a connector like this will not provide use of the trailer brakes, 12V power source, or reverse lights. The 4-way connector only provides tail lights, brake lights, and left and right turn signals. The only way to gain use of these functions is to fully install the 7-way. With the # 30717 connector, the white wire will need to be grounded to provide function to the...
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  • Running Light Circuit Does NOt Work After Installing New 7-Way Trailer Connector on Vehicle
    What vehicle did you install it on? Did you use something like # 30717 or was it a regular 7-Way, not an adapter? Adapters like this must be grounded using that separate white wire otherwise they will not work properly. Try moving the ground to a different location. If you happen to have a Nissan then there are some Nissan vehicles that require an additional relay, like the blue ones included in part # C57000, inside the in-cab fuse panel for the running lights. On vehicles that use relays...
    view full answer...


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