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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:
California residents: click here
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.
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.
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?
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.
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.
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.
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
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.
Fit perfectly. Love the holes in connector for zip ties since the trailer tongue is a sway system.
Worked perfect for my 2016 Ranger 519C double axle trailer
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!!!
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.
I called into customer service while driving down the road needing help to reorder a part I previously purchased and Sarah helped me find my part and ship it over night to the resort we’re staying at so I’m able to fix my trailer before we leave. The tracking, the service and most of all Sarah that helped me were absolutely awesome!!!! Thank you for everything!!!!
perfect replacement for my bass boat tr ailer
Works great for connecting/converting from flat plug to round plug. However, the insulation is very stiff and would need to be softer and more flexible. Just like the last one I had, the outer insulation cracked. This one seems like it will do the same.
Was the wrong part, Opronics gave me the part number to give you, have to send it back, the one on right is wrong
Excellent customer service! Thanks
Thank you! It was a quick connect and working perfectly just in time for my LBAA tournament
Perfect replacement on Ranger boat trai ler.
The product fit as described and was delivered quickly.
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.
Got turned on to this in a forum as a replacement for a Ranger bass boat trailer with a folding tongue. Awesome...saved a pile of money. One year in, still in perfect shape, coil is still tight.
I actually returned the long one (94-1/2") for the shorter one. The shorter one was a perfect fit for my Ranger bass boat. Very happy. Installation was easy. I would definitely purchase again if needed.
Brooke M.
1/28/2025
Glad it worked well for you, Keith. :) So you like to fish? Do you do any professional competitions or just for fun? My newest brother in law is semi pro, I believe. Never knew how big the fishing world is!
Everything worked great and delivered fast I will order here again thanks for the good service
Product is great, reasonably priced and an exact replacement for my Ranger trailer. Better still was the etrailer support and customer service. I received an email from William S, not a random customer service email account, who let me know exactly when my order was prepared, shipped, and delivered. Excellent service and if anything would have gone wrong, which it didn't, I believe he and etrailer would be right on top of it and correct the matter quickly. Thanks for the great support and products.
Just ehat i expected. Arrived two days early too. I have never been disappointed dealing with your company
It's exactly what they say it is.
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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... :)