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Trailer adapter converts a tow vehicle's 7-pole wiring connection to a 5-pole flat pin connection for towing trailers with hydraulic brakes. Coiled cord stretches and contracts for extra flexibility. Threaded bracket ensures a secure connection.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to take a look at the Optronics Seven-Round to Five-Flat Coiled Cable Adapter. Now, this will convert your tow vehicle's seven-way blade connector into this five-way flat pin connector. It is a coiled cable design. If you notice on the seven-way, it has a nice finger pull design for easy plug-in and easy removal. On the five-way flat end, it includes this threaded mounting bracket right here, that you can pull as much cable out as you need. Once you get it, you can see it just comes apart when you mount that.
Once you get it to how far you want it out, if you tighten that down, it will keep it at that distance. You can just put it wherever you, once you mount it, adjust it to wherever you need it. That should do it for the review on the Optronics Seven-Round to Five-Flat Coiled Cable Adapter.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Absolutely perfect fit and super easy to install!
Worked perfect for my 2016 Ranger 519C double axle trailer
Great replacement for my 2018 Ranger boat. I was surprised when I found a mounting bracket for the plug end which will help reduce the stretching and sagging of the trailer plug harness.
Fit perfectly. Love the holes in connector for zip ties since the trailer tongue is a sway system.
This item was an exact replacement for the original equipment on a Ranger boat trailer. It lasted three years before disintegrating. I hope the one I just purchased as a replacement lasts longer.
John
5/25/2025
The equipment I purchased is still in excellent condition and works as it should.
Used it over the weekend and it worked flawlessly
I haven't got a chance to put it on my trailer but the delivery time was excellent and the product is exactly what i needed.
Replaces the wiring on a 2019 ranger tr ail.
This is my second replacement, works as advertised.
EXACT REPLACEMENT - 2015 Ranger Trail tandem axle trailer. 521C. Great quality and informative shipping. E Trailer is always top notch. Highly recommend.
Stu C.
7/7/2025
Fabulous
Special thanks to Karen for being so nice and helpful making sure I ordered exactly the part I needed for my trailer. Perfect fit and great company to deal with.
Package was delivered late but product is in good shape! Nathan was very helpful locating package in Dlorida and getting it back to Texas! Thanks
Was the wrong part, Opronics gave me the part number to give you, have to send it back, the one on right is wrong
Perfect fit except for the retainer, used my existing cable clamp.
It was a direct replacement. Will shop again with you guys.
This was the perfect part to replace my old worn out connector on my boat trailer. Just unplug the old cable and plug in the new! Doesn't get any easier than that. Trailers fast shipping and excellent customer service are a definite plus!
James
9/18/2025
Its holding up well. Great replacement cable for the boat trailer.
Missing the little mounting clip for the plug. Otherwise, nice plug and play replacement for my boat trailer.
Item was exactly as described, I needed a extra pigtail for my boat trailer and ordered and its exactly like the one that came on it.
Product was amazing... exactly the part I needed for my 2018 Ranger Trail trailer for my 2018 Z21L. Delivered on time and easy to install. Quality durable piece that will keep my mind at ease when it comes to my trailer lights for years I'm assuming!
Very pleased in Massachusetts!
Exact replacement for Ranger Trailer wiring harness. Timely delivery and easy install.Quality appears to be good after 1 year. Original lasted 8 years--time will tell.
John
12/13/2025
Still performing as intended.
Easy to order parts and a great price . Fast delivery,I will use again in the future for all my trailer needs, thanks.
Nick S.
1/19/2026
I am glad to hear you had a great experience! What kind of trailer are you using this adapter with?
Product was exactly as described. Plug was a direct replacement for what I have so installed without any issues. The plug holder was a nice addition. Total replacement time <10 minutes.
This was installed on at 2019 Z521 Ranger boat trailer.
Abigail did a great job helping me identify the correct parts for my brake actuator assembly. I received the correct part in a timely fashion and it fits and works great. I definately recommend etrailer and would use them again. Thank you Abigail and etrailer.
Exact replacement for my 2012 EZLoader boat trailer including the mounting pieces. Photo shows my original was disintegrating. I’m very happy with this exact replacement.
Direct replacement for a 2017 Triton 20 TRX Patriot Trailer.
Fits perfect. The hardest part is getting off the small locknuts the factory used on the cable brackets. etrailer service is excellent.
Brooke M.
7/1/2025
Do you have any tricks that worked for you on the locknuts? Might be able to save someone reading your review a lot of effort... :)
Brooke M.
7/11/2025
Jeff
6/30/2026
No issues. Working fine!
Info for this part was:
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Grh
8/25/2025
My trailer plug was working great till I forgot to plug it in on my last trip and had to replace it. I called and customer service had a new one sent to the resort we were staying at in 3 days so I was able to replace it before we had to travel back home. Awesome!!! customer service. Thank you!!!