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7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long
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Optronics

7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long

Part Number: A57CCB
328 Reviews | 9 Questions
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$42.33
Retail:$90.00
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 Custom Fit Vehicle Wiring
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optronics custom fit vehicle wiring 7 blade to 5 flat a57ccb
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optronics custom fit vehicle wiring adapters
optronics custom fit vehicle wiring adapters
optronics custom fit vehicle wiring adapters 7-pole blade to 5-pole flat connector wired trailer adapter - coiled cable 66 inch long
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7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long customer photo
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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. 1-800-940-8924 to order Optronics custom fit vehicle wiring part number A57CCB or order online at etrailer.com. Free expert support on all Optronics products. Great prices and Fastest Shipping for 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long. Custom Fit Vehicle Wiring reviews from real customers.
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Optronics Custom Fit Vehicle Wiring - A57CCB

  • 7 Blade to 5 Flat
  • Universal Fit
  • Wiring Adapters
  • Plug and Lead
  • Optronics

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:

  • Trailer adapter converts a tow vehicle's 7-pole wiring connection to a 5-pole flat pin connection for towing a trailer
    • Allows 1 vehicle to tow a camper or boat trailer with hydraulic brakes
  • Handle grip on 7-way plug for easy connection and disconnection
  • Coiled cord stretches and contracts preventing unneeded stress on wires
  • Threaded mounting bracket ensures secure connection to vehicle


Specs:

  • Stretched length of cable from plug to plug: 66"
  • 5-way flat plug to coil: 17"
  • 7-way round plug to coil: 7"
  • Length of coiled cable section unstretched: 8"
  • Coiled cable diameter: 1-3/4"


A57CCB Optronics 7 Way Blade to 5 Way Flat Wired Trailer Connection Adapter for Campers and Boat Trailers with Hydraulic Brakes - Coiled Cable - 66" Long









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Video of 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for All You Need to Know About the 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter

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:

Ratings & Reviews

4.9

328 reviews
5 Stars
(300)
4 Stars
(19)
3 Stars
(6)
2 Stars
(2)
1 Star
(1)
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by:
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.
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Brooke M. profile picture
Etrailer Expert

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... :)

Jeff profile picture

Jeff

7/11/2025

@BrookeM If the locknuts are not cross-threaded they should come off if the Phillips head screw does not get stripped out. Mine were cross threaded and I had to cut one bolt off. Use a mini socket and wrench, hard to use full size. Use a 10 or 11 mm socket. 
Brooke M. profile picture
Etrailer Expert

Brooke M.

7/11/2025

@Jeff That's super helpful to know :D Thanks, Jeff!
Jeff profile picture

Jeff

6/30/2026

No issues. Working fine!

by:
Easy to order parts and a great price . Fast delivery,I will use again in the future for all my trailer needs, thanks.
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Nick S. profile picture
Etrailer Expert

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?

by:
Product received was as described. However I did not recieve my order when expected but 6 days later. ETrailer does a great job at shipping your order but the vendor used or the method used is in adequate. This is the second time my order has not arrived on time.
by:
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.
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by:
Ordering was easy process, shipping was done quickly. I swapped out my old cable, new one is working fine.
by:
Exact part as needed thanks to Austin and his exacting communication skills; i.e. knowing "street" names some of call parts. Austin spoke that language to me and turned it into what I need. Thanks so much for all the help!
by:
I recieved the pig tail. Thank you. USPS did you no favors but you did an excellent job
by:
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.
by:
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.
by:
Right fit,excellent customer service
by:
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 profile picture

John

12/13/2025

Still performing as intended.

by:
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!
by:
Exact OEM replacement. Works great!
by:
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 profile picture

James

9/18/2025

Its holding up well. Great replacement cable for the boat trailer.

by:
Missing the little mounting clip for the plug. Otherwise, nice plug and play replacement for my boat trailer.
by:
It was a direct replacement. Will shop again with you guys.
by:
Good product with quick delivery.
by:
Perfect fit except for the retainer, used my existing cable clamp.
by:
works fine
by:
Was the wrong part, Opronics gave me the part number to give you, have to send it back, the one on right is wrong
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by:
Great product received in a on time
by:
Professional!! Very well run and monitored. I will be back.
by:
Quick delivery
Good quality product
by:
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
by:
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.
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See what our Experts say about this Optronics Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?
  • Replacement for Fulton Jack on 2016 Boatmate Trailer
    Hi David; for a replacement jack I recommend the Trailer Valet JXS Drill Powered Swivel Trailer Jack w/ Footplate # TV64FR. This jack has a 5,000 lb capacity so it will be a lot easier to operate compared tot the Fulton one you have now. You also have the option to use a drill to raise and lower it (changes lift capacity to 1,250 lbs). I'm guessing you want a wheel so you will also need the # TV89FR. As far as the wiring I'm not sure what you currently have on the trailer. If you have...
    view full answer...
  • Will 7-Pole Blade to 5-Pole Flat Connector Work With Utility Trailer With Brakes
    Hi Justin; the # A57CCB is designed to connect your vehicle 7-way to a 5-way on a trailer. The 5-way is for trailers that have lights and an electric lockout on a hydraulic brake actuator. If that is what you have on your trailer and you want to wire it in directly you can cut off the connector and hardwire it. If you have electric brakes you want to use the # WG54006-043 instead which has your standard brake output wire and 12V power on top of the functions for the lights.
    view full answer...
  • Where Does Sliding Lock of 2019 Triton EZ Loader Trailer Mount on the Tongue?
    The Optronics 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 94-1/2" Long # A57CCB will work with your trailer wiring. The 5-way on your trailer will have the reverse light power that will on the trailer connection end connect to the reverse lockout solenoid of your coupler. I've attached a photo of the underside of the coupler that has that reverse lockout wire coiled up underneath. This will electrically stop the fluid flow to allow you to back up your...
    view full answer...
    Image 1 for Image 2 for
  • What is Overall Length of Adapter 7 Pole to 5 Pole Flat Wired Adapter A57CCB When Stretched
    I spoke with my contact at Optronics about the 5-Way to 7-Way part # A57CCB and the dimensions are: Stretched length of cable from plug to plug is 72 inches 5-way flat plug to coil is 17 inches 7-way round plug to coil is 7 inches Coil length is 8 inches Diameter of coil is 1.75 inches
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  • 7-Way Vehicle Connector to 5-Way Flat Trailer Connector Adapter
    Yes, there is an adapter to plug your 5-flat boat trailer connector into your 2016 Ram 2500's 7-Way. It is the Mighty Cord 7-Way RV Style to 5-Way Flat Trailer Connector Adapter item # A10-7275VP. This will provide you with a secure connection so you can connect to your trailer and power your lights and back up solenoid.
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  • Replacement Actuator With Electric Lockout for Fulton A60
    What you need is an actuator rated for disc brakes with an electric lockout. I recommend the Demco Hydraulic Brake Actuator # DM62VR.This has a 7,000 lb capacity which is slightly higher than your A60 and fits a 2" ball. It also features the E-Z latch coupler that lets you drop the coupler over the ball to snap in place. The electric lockout will allow you to back up without getting out of your truck. I'm assuming you currently have a 4-way on your trailer so you will also need to change...
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  • What 7-Way to 5-Way Adapter do I Need to Tow a Boat Trailer on My 2021 Audi Q5?
    The adapter you need to adapt a 5-way boat trailer to your 7-way on your 2021 Audi Q5 is the 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable # A57CCB. If you do not need the cable, you can get the cable-less adapter as well. That is the Adapter 7 Pole to 5 Pole Flat - Molded # A75TB.
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  • Available 7-Way to 4-Pole and 5-Pole Wiring Adapters
    Yes, a 4-pole flat type trailer connector can mate with a 5-pole flat. The additional circuit on the 5-pole side would obviously not be connected. But we do have 7-way to 4-pole cord-type wiring adapters too, similar to 7-to-5 adapter # A57CCB, such as # HM47065, and # C57271. We also have plug-style adapters such as # HM47570 that convert a 7-way to 4-, 5- and 6-pole, all in one product. All wiring adapters are shown on the linked page.
    view full answer...
  • Parts Needed to Make Custom 7-way to 5-Pole Wiring Harness for Light on Bike Rack
    To complete your wiring with a 7-way cord, taillight converter and 5-pole connector I recommend using a few other similar items to give you a cleaner and potentially more reliable setup. Instead of cutting part # A57CCB you could use coiled 7-way plug/cord # WG54006-043, converter # 118158 and 5-pole vehicle-side connector # HM47900. To make the wire connections you can use butt connectors # DW05744-10.
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jeff D
Installed by:
Jeff D
Employee Adam R
Expert Research:
Adam R
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Anna W
Written by:
Anna W
Employee John S
Video Edited:
John S

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