Product Specs:
Trailer Wiring
Wiring Adapters
Single-Function Adapter
4 Flat
Plug Only
7 Round - Blade
Pollak
Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.
Video of Pollak 7 Pole to 4 Way Connector Adapter
Average Customer Rating: 4.9 out of 5 stars (920 Customer Reviews)
Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.
I wanted one with a LED tester built into it to "trick" my SUV into thinking I had a trailer connected when really it was just a bike rack so the car didn't slam in it's brakes while reversing thinking it was something else. So I bought a different adapter.
The picture slightly deceived me into thinking this had LED tester because the plug is attached by a rubber string (that I thought was a wire). So add another picture of the other side and that would eliminate my confusion.
4 stars because it probably works the way 99% of people would want to use it for.
Everything worked out well. On time and fits perfect. Attach hitch setup and my new Ridgeline.
It comes with a 2" inch receiver and I have a full compliment of 1.25. stuff from my previous car. All from etrailer i must admit!
so I needed the 2-1.25 reducer, a good lock, and the 7-4 reducer for my goodies!
Thanks for the grest service
Ralph
8/23/2021
great use it a lot
I used this outlet plug to have 12 volt to power our shuttle pump on the water wagon to pump chemicals into our chem farm mix tank works really well easy to wire and very nice looking very durable .
Works well with hitch and harness I purchased for e-trailer.
It works, it doesn’t have indicator lights so it doesn’t make my Rivian think I’m towing unless I actually am. The cap is difficult to remove as it’s recessed into the unit, overall it does the job.
This Pollak 7 Pole to 4 Way Connector Adapter is exactly what I needed and works great. I just used it a couple days ago, and after having it for over a year, it's just as reliable as day one. I highly recommend it.
This adapter plugs in to the OEM receptacle without any excessive effort and the flat 4 pin connector on my utility trailer also plugs into the adapter without any excessive effort. As a bonus there is a cover for the 4 pin side of the adapter to protect it the elements when not in use.
Does what it is supposed to do. Just make sure to push it in all the way for a good connection
Just the adapter I needed at a reasonable price and quick delivery.
Does what it's supposed to.
Exactly what I wanted, received in good shape and on time!
The trailer connector was easy to use and worked as advertised with no problems.
David
4/12/2023
Still operating like new. Great product.
Does the job. No issues, made well.
Exactly waht I needed
Best brake controller. Very easy to install and use.
Fit perfectly on my 2020 Sprinter trailer plug in. It adapted my 4 prong flat connector for my bicycle carrier lights
I have bought several items from etrailer that are high quality, affordable and sometimes not available in my area.
First time buying a tow bar. Great experience with Jesse at errailer. etrailer videos are excellent.
Although I am commenting on this product, I actually would like to comment on the following products. I purchased a brake system, tow bar, base plates and wire harness from etrailer. All of my orders were filled in a timely manner. When I reached out for technical assistance, the advisors were readily accessible. All of the products were installed by me. All of the products were very easy to install by using the video and instructions.
This will work on my trailer but need a plug that will fit in here so I can plug the 7 way pole into it.
Jenny N.
2/2/2023
I am happy to locate the plug that you need, however I was uncertain of what you are looking for. Are you looking to add a 7 way to your trailer?
Easy to plug in and remove. Works great.
Received the replacement item in record time. I will check out the ability to allow the ML350 to light the LED equipped trailer.
Cheers,
Gary
1/1/2023
Continues to work as advertised!
Good quality and the connections are snug and won’t come out too easily.
Once I got the receptacle for my 2021 VW ID.4 I needed the convert. This is retained nicely by the door on the receptacle so that it does not fall off enroute.
The adapter works GREAT and the shipping was very fast! Thank you!!!!
Walt R.
1/21/2015
Worked great thank you!
Customers compare PK12716 to these similar products
Ask the Experts about this Pollak Trailer Wiring
Do you have a question about this Trailer Wiring?
VS
Product Specs:
Trailer Wiring
Wiring Adapters
Multi-Function Adapter
4 Flat
7 Round - Blade
Plug and Lead
4 Flat
CURT
This multi-function, vehicle-end connector converts any 4-way flat, vehicle-end plug to a combination 7-way outlet and 4-pole flat outlet.
Video of Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
Average Customer Rating: 4.7 out of 5 stars (307 Customer Reviews)
This multi-function, vehicle-end connector converts any 4-way flat, vehicle-end plug to a combination 7-way outlet and 4-pole flat outlet.Not too difficult to install, but I would recommend using a car lift so you don't have to work from your back (review includes wiring harness and Brake Controller)
Very easy install. My truck had a precut hole in the bumper for the plug. I then hooked the spare 4 pole plug into a Reese Universal mounting bracket and mounted it onto the hitch.
Perfect . My new Subaru hitch has a flat plate to which the dealership attaché the 4-flat. I used “2 L-brackets” to accommodate the 90 degree bend of the adapter bracket.
Your product have no use. Becauae of late delivery i have to pay installation twice because when i order it delivery date tou guys provide is not that qhen i get delivery. If i send it back i have to pay transportation. So i m stuck by pedering from your site.pay twice peicw for producy and twice for installation.
This harness works great for what it does. The biggest problem I have with it is that the wire harness coming straight out the back of the 7-pole connector are very stiff. If you're tight on space (like I was), this severely limits your mounting positions. Instead of being able to install this near the hitch receiver (like you see on most factory installs), I had to angle it in an awkward direction just to get it to fit. Maybe it's just my setup where the hitch comes down around the spare tire underneath the vehicle. This will work for my purposes, but if I were installing an aftermarket hitch & wiring again, I'd definitely avoid this, or at least plan ahead to guarantee there's plenty of mounting space for this.
I recently had a receiver hitch installed on my 89 Silverado and the wiring was merely zip tied to the safety chain connection. Well that didn't sit well with me. I wanted a more permanent wiring connection point. So I purchased your 4 flat to 4 flat and 7 way plug and installed it. So far so good. The installation turned out perfect and it looks good. The test lights are a great thing as well. I couldn't be happier.
Lawrence L.
8/16/2018
Perfect. The only issue I had was the 4 flat didn’t stay in the bracket but that was easily remedied with a couple of holes and some safety wire. Other than that I’d say u have one of the best setups you could ask for.
I installed this 4 to 7pin adapter with the T-one harness 118449 and the Drawtite hitch on my 2016 Toyota Highlander. I think the install was 1st rate. This adapter allows me to connect either a 4 pin or 7 pin plug. Nice. Very simple to check out the installation with the test lights. Adapter looks rugged and well made. The 4 pin receptacle that slides into the bracket should have better retention though.
Also I provided a picture of the 4 wire cable from the car harness to the adapter as it exits the storage compartment. I removed the grommet/seal. Made an X cut in the center. Forced the cable through it. Made a waterproof seal with RTV.
The bracket was too wide for the OEM hitch and cover on a 2013 Highlander (see photo). I had to grind down part of the the bracket so it would clear the plastic cover. The top two mounting screws did not line up. I had to elongate one of the holes. The 4 pin connector merely slides into the side of the bracket, rather than fitting in like a grommet, so I'll bet it comes out one day. The wiring on the back of the 4 pin connector is visible when looking at the side of the bracket, making for a less than clean look.
Great product. I like how the company waits a year for a product review for an honest rundown on how functions from sales to "in action" I have made previous purchases from this company and will continue because of quality, availability and sales staff assistance who are available when needed. If you pull any kind of trailer, you should try etrailer.
This is the second vehicle I have installed this adapter on. We tow a Coleman popup and another smaller trailer so we need both the 4-pin and 7-pin adapters. The test lamps are great to confirm that you have installed the wiring correctly.
I use both 4 pole flat and 7 pole connections on our trailers so this fit the bill. Here, I welded a bracket to use it on our Dodge Journey.
Installed and have camped for one season using this 7-pin connector. Works great. I did make one mistake, I didn't add a relay to break the aux power connection when my vehicle is not running so the aux power LED is always lit. Got a number of comments about that this season. Might have to add a relay...
Very quality product. Well built and easy to install. Had another manufacture's harness on my vehicle and after about a year, it was intermittent. The Curt harness is sealed in the back which is why I choose this one along with the builtin test lights. I would recommend this harness to anyone along with the great service at etrailer! I installed the harness on a 2016 Hyundai Santa Fe Ultimate.
Looks pretty good well made we'll see what happens when I install the system.
James
10/31/2023
Its working great. No problems so far.
Install was simple. Plugs in, added my own wires for brake controller and constant 12v. Works 99% great. When trailer is hooked up up, works perfect. Except, when I I unplug the trailer the test lights mess with my brake controller. The LED somehow is still inline with the circuit, well because it is a test light. I snip my blue wire going into the harness and my brake controller works perfectly when I unplug it. Have to switch over to the same adapter harness that does not have the test lights.
I am using a redarc tow pro v2. I get the flashing red light about 10 seconds after disconnecting the plug. In my case the error list this as a faulty ground on the trailer. I don't get it because it is unhooked? Regardless I wired the controller and adapter harness ground all the way to the battery itself. Still didn't change a thing. I even called redarc tech support in Australia. I never did tell them about the test LED's though, maybe if I did they would have went a different direction with the diag. They helped the best they could. I don't fault the person I talked to at all. I would guess the test lights on the adapter to be wired in parallel to work. With that thought, after unplugging the trailer, the brake controller must still be seeing the LED test light. I'm not an electrician/engineer but the small led of a test light, maybe not enough resistance overall to think a trailer was hooked up, but enough to throw a fault. If I was to break/damage the test led for brake, I would bet that it would most likely would work fine as it would cause an open in the circuit.
Jenny N.
11/1/2021
Thank you for your feedback. We had heard of this happening with the adapter and reached out. There has been a design change with the adapter to eliminate this issue.
Jerry
10/18/2022
Apadter works great sitting on my shelf. Installed the same style adapter that doesnt have test lights. Brake contoller works as designed.
Last project built. Used etrailer for almost all parts, including the 7 pin wiring harness. Friend wants one now so started another one. I will be getting all the parts from etrailer...
Great product! Sturdy and weather-proof connections and wires! Easily installed. Thanks Curt and etrailer.com for an awesome item!
Shipped out very fast and arrived before the estimated arrival date.. install was super easy with the LED test lights.
Exactly what I needed.
Hitch & electrical harness installation instructions were accurate. Complete install took 2 hours. Job well done eTrailer.
2013 Dodge Durango
Looks great. Nice and clean installation.
I bought this for my '68 GMC 3/4 ton, which is in really nice shape so I wanted a clean install. The hitch was pretty easy to fit - I had to drill holes in the frame but I knew that going in. I especially liked the built-in bracket for mounting the trailer plug, worked great with a Curt combo 7 pin / 4 pin adapter from eTrailer.
Good product, great seller.
I was surprised at how sturdy this installation is. etrailer sure helped me out along the way with this installation. Special thanks to Alex J for his help on several occasions to help me get the right hitch and accessories for my new 2021 Hyundai Palisade Calligraphy.
looks well built
Great product for a great price, it's worth mentioning though that the 7 blade and 4 blade conections don't mount side by side unless you use the supplied bracket, mounting it through a flat spot on the bumper Wil leave the 4 pin connector hanging behind where you still have to crawl underneath to hook up a small trailer. But the LED lights are absolutely awesome to have and have labled.
Daniel
10/22/2017
Still works great, and the led lights are still the best feature
Customers compare C57674 to these similar products
Ask the Experts about this CURT Trailer Wiring
Do you have a question about this Trailer Wiring?
Jenny N.
5/1/2024
I see what you wanted to do however using a LED tester would not provide enough resistance to make the SUV think that a trailer was plugged in. Typically what I recommend is turning off the feature in the SUV when you are using the bike rack. I know it can be a bit of a pain.