This is an adapter that converts the tow vehicle's 7-way blade connector into a 5-way flat pin connector. This model has a short length of wire joining the two connectors.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Randy: Hey guys, it's Randy here at etrailer.com. Oftentimes, our customers ask us for a solution to turn their regular working seven pole on the back of their vehicle into either a four pole or five pole flat. This is one of many options that we have here at etrailer. This one's from Optronics. Now, unlike a lot of the other ones that we have like this where the plugs are mounted pretty much right here on the back side of the plug, this is also going to give us an extension. Now, this is about 21 inches from this tab right here which is going to be about midway on your door to the end of the plug there, just to give you an idea.
It's going to give you a nice, long reach. This can be really important if the trailer that you are using has a short pigtail on it.If your plug, like on a Trailblazer, or a Toyota 4Runner, if it's way up underneath here and you need to get some reach back, or in lifted applications. A lot of times, you're going to have in a lifted truck, you're going to have a pretty deep drop, and the longer those get, the more and more length we need to get from our connector to the trailer.Now, basic four pole functions are going to be running lights, ground, left turn signal and brake, and right turn signal and brake. The fifth one that we have here, that's used a lot of times in marine trailer applications. That's your reverse signal.
As you shift your vehicle in reverse, that's going to send power through, and that can prevent a surge coupler from locking up. So as you're trying to back up, it'll back up smoothly. But customers also ask frequently if they can power some trailer lights off of it, if they can power some backup light. So as you get to your destination, you throw it in reverse, you'll have a lot of light behind you to see, and that's perfectly acceptable.Now, other than the extension portion of this, I think this is a really, really rugged adapter. Everything has been molded on, so we don't have any gaps in it anywhere.
This isn't going to be something that we have any concern about it over time, water seeping into it and causing us issues. I really like the way it's designed. It feels really good. If I had a need for this, then I would definitely own it, whether it was a short pigtail or if I had a lifted truck and I needed to get a little bit more reach. I do have a Trailblazer, and this would come in handy when I plug it underneath there.
I actually made my own. I didn't know this one existed or I would've just bought this one. It would've been easier.Now, as far as the installation process goes, it's no different than a standard seven pole. You're just going to slide this in so that the catch on the door fits in behind this tab. It's going to keep it nice and secured, prevent it from coming out. Then on the other end, we're just going to plug in our trailer. Now, one little tip; if your four pole connector is shielded, meaning that these pins are inside of a large, black plastic cover or that they don't stick out like what you see here, using that in a four pole application will require you to trim just the end of it off. You can see as this goes in, if that shield was in the way, it wouldn't allow it to slide down inaudible 00:03:12. So you might have to recess it for that. But as you can see, it's an excellent solution. It's going to give us the extension we need, be able to power a trailer and keep us safe.If this plug we're not to reach the back of your truck, or if you didn't have a working seven pole, with short distances, a lot of people just leave it off, and that makes a dangerous situation for us. Being able to see what a trailer's doing in front of you makes the experience a lot better. For anybody driving behind you, they know if you're stopping or if you're turning, so it is important.As far as customer reviews go, it gets really, really high reviews and kind of some of the things I said, just how sturdy and how good quality it feels is really important. Some of these adapters can sometimes feel a little bit more flimsy. Although they do the job really well, they just don't feel as high a quality as what we have here. Now, with any plugs like this, we always recommend dielectric grease. This is available on our website if you don't have it. Just want to put it on each of the connection points there. That's going to keep moisture out. We don't have any moisture in there, we don't have dirt holding, we're not going to have any corrosion.The one slight dig, I guess, I would have on it, you can see that our connectors on this side are brass. Those tend to corrode a little bit more quickly than what we get out of a nickel coated style. But I think all in all, you put a little dielectric grease in here, this is going to solve a lot of problems for you.
Average Customer Rating: 4.9 out of 5 stars (96 Customer Reviews)
Some of the smaller trailers I haul from time to time do not have a harness long enough to reach all the way to the bumper of my 3/4 ton pickup. This pigtail perfectly solves that problem, without adding too much excess wiring. It includes the fifth pole for some boat trailers to release the pressure brakes while in reverse.
Used the adapter multiple times! Not much to say except works great! Extremely satisfied. I can however not say enough about etrailer's customer service. They are awesome plain and simple. Thanks for following up to see how I liked the adapter!
Mike S - 04/01/2021The 7 pole to 5 pole adapter was exactly what I ordered and arrived sooner than expected. I have not had a chance to try it out but matches up prefect to the adapter it replaced. Thank you to the etrailer team.
Perfect adapter, no issues with it at all. Simple and easy working with trainer! Thank you!!
Very handy. Quality products. High quality customer service. .
the adapter looks to be very strong durable and all that i could ask for
It's a good idea to keep a spare. This part is the weak link in every light system.
OK J - 05/20/2021This is a somewhat unusual and hard to find item at most stores selling automotive trailer wiring accessories and harnesses. I purchased a new 4X4 pickup which has the 7-blade connector to the left side of the license plate holder on the rear bumper step. Previously, I had my 7-blade connector immediately adjacent to my receiver housing on the underside of my rear bumper. And, with the higher profile of the 4X4, I now use a 3 1/2" drop drawbar to mount my 2" ball. This new arrangement puts my boat trailer harness extended to it's maximum, with minimal room for wide, short turns over a small distance, or backing up at sharp angles. Enter this Optronics adapter, which adds another 18" to the pigtail side of my trailer wiring, and provides only a single connection between the two five way flat connectors. Molded in 7-blade plug and solid jacketed 12Ga wiring with the five way flat female connector molded in on the other side. This adapter works like a champ and looks great!
Chris W - 04/06/2019PORS--very well made CONS--took three weeks to get here even though the item was in stock from the beginning
I needed this to hook up my new 5 pin trailer with surge brakes to my truck with a 7 pin plug. Not only does it allow me to back up and release the brakes but my trailer assist feature now works with the back up camera.
Dennis - 05/29/2018Have used this for a year now. It is well made and works as advertised.
I was unable to find this wiring harness at any of the local automotive or farm supply stores. It is exactly what I needed for my boat trailer and the product works great. Once I ordered the product, it arrived at my house within days, which is great service on top of a solid product.
Russ - 01/26/2018The light and rubber boot was easy to put in a worked well, but the boot did not fit as tight as I would have liked when the trailer was empty and bounce a lot the boot and light fell out, have reorder a new boot and light will put silicone on the boot this time
The adapter worked great and exactly as advertised!
The order was as 7 to 5 way trailer wiring adapter.It seems well made and I would expect it to hold up well. What really stands out is how quickly it arrived all the way here in Ak ,during the Covid outbreak when most others have slowed to a crawl. 3 days!
Great and fast servicev
This adapter is made out of quality material. It was a perfect fit on my Envoy, and boat trailer. I would recommend this item to anyone who is in need of this type of adapter.
Frank F - 03/30/2015Very nice and works well.
Although I have yet to use it,this is exactly what I needed for my new to me rig. 5 pin trailer side plugs aren't easy to find but this one does it all,quality made, at a good price and fast shipping.
Work fine.
Order arrived as promised, hooked it up to my Tundra and it work flawlessly. If you needed the extra extension like I do, this is it. The adapter feels very sturdy and I think it's going to last a long time. Definitely will do business with etrailer again, you guys are awesome. Thanks, Ben
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