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7-Way Round RV Style Trailer Connector - Trailer Side
Optronics

7-Way Round RV Style Trailer Connector - Trailer Side

Part Number: A7WCB
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$12.86
Retail:$13.71
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7-Way round plug lets you connect your trailer to the 7-way round blade connector of your tow vehicle. Interlock system keeps connections in place. Over-sized finger grips for secure disconnections. Durable ABS plastic housing. Great Prices for the best trailer wiring from Optronics. 7-Way Round RV Style Trailer Connector - Trailer Side part number A7WCB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Wiring - A7WCB

Highlights

  • Universal 7-Way Connector: Easily connect your trailer to any 7-way socket on your tow vehicle.
  • Sturdy ABS Housing: Features durable ABS plastic ensuring longevity and resistance to damage.
  • Interlock System: Keeps connections secure, preventing accidental disconnections.
  • Oversized Finger Tabs: Facilitates easy handling and removal, even in tight spaces.
  • Color-Coded Terminals: Simplifies wiring by matching wires to color-coded labels for ease of use.
  • Sealed Design: The adjustable insert reduces dirt, dust, and water exposure to maintain reliability.

Features to know about

Hassle-Free Disconnections: Over-Sized Finger Grips

Disconnecting your trailer shouldn’t be a struggle. With the over-sized finger grips on the 7-Way Round RV Style Trailer Connector, you’ll have a reliable hold for easy, hassle-free disconnections every time. Whether it’s a cold morning or a muddy setup, these easy-to-grip tabs take the stress out of the process.

Reliable Connectivity: Interlock System Securely Locks Connections

Worried about loose connections during your journeys? The interlock system ensures that your trailer’s plug remains securely fastened to the tow vehicle’s connector. This added stability is perfect for long trips and bumpy roads, providing peace of mind knowing that your connection will not budge.

All-Weather Durability: ABS Plastic Housing

From rainy days to sun-scorched highways, the durable ABS plastic housing of this connector stands strong against the elements. This robust construction keeps dirt, dust, and water at bay, safeguarding your wiring from any nasty surprises that could ruin your journey.

Custom Wiring Made Simple: Adjustable Insert for Tight Wire Fit

No more exposed wires or loose connections. The adjustable insert of this connector tightly secures wires, minimizing exposure to dirt and moisture. This feature ensures a snug fit, making custom wiring projects straightforward and clean, especially if you’re converting or upgrading your setup.

Seamless Wiring Conversion: From 6-Pin to 7-Pin

Transitioning your Lance camper from a 6-pin to a 7-pin setup is made easy with this trailer connector. Match the vehicle-side 7-Way functions, and you’ll effortlessly integrate your trailer and tow vehicle systems without disrupting any of your current setups.

Optimize Trailer Wiring Upgrades: Suitable for Diverse Applications

Whether you’re upgrading your trailer’s wiring or crafting custom connections for unique setups like integrating 12V pumps, the 7-Way Round RV Style Trailer Connector comes highly versatile. With the ability to accommodate a wide range of wiring functions, it’s a perfect solution for modern and vintage trailer plans alike.

A7WCB Optronics Replacement 7-Way Round RV Style Trailer Connector - Trailer Side

Alternate part: A-7WCB

Compare to Bargman 54-77-003




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Video of 7-Way Round RV Style Trailer Connector - Trailer Side

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Feature Breakdown: 7-Way Round RV Style Trailer Connector

Hi, everybody. Andy here with etrailer.com. And today we're gonna take a real quick look at this seven-way round RV style trailer connector. This seven-way round plug is going to let you connect your trailer to your seven-way round blade connector of your tow vehicle. And this features a durable ABS plastic housing and the interlock system is going to lock in place to keep your connection secure. The oversized finger tabs are going to allow you to easily grip the plug during disconnections.

And I wanted to point out a few things here. On this end, on this side here of this connector, we have these two set screws that's going to loosen and tighten this insert. So when you begin to run your wires through this connector, you obviously want to loosen these screws up and that's going to allow that insert to move out of the way. So then you can begin to run your wires through there and then you can just tighten these two screws back up and that will in turn tighten up that insert and that's going to close, that's going to close up against the wires that you run through here, giving you a nice, tight, secure fit. So that's going to keep out dust and moisture out of those connection points.

And then I wanted to point out this other screw that we have here on the other end on top, that's going to allow this connection point to actually come out of the housing. So you're gonna run your wires through, get this portion out and make your connections and then put it back into the housing and then tighten the screw. Well, that's gonna conclude our brief look today. I do hope that it was helpful for you. Again, my name is Andy.

Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

4.7

347 reviews
7-Way round plug lets you connect your trailer to the 7-way round blade connector of your tow vehicle. Interlock system keeps connections in place. Over-sized finger grips for secure disconnections. Durable ABS plastic housing.

by:

Well made, very easy to install.



by:

I should have bought a better one. This will work though. The wiring colors molded into the back of the connector do NOT match the standard 7 pin wiring listed on etrailer.com's site, nor did it match my truck. I used etrailer's wiring guide and all is well.



by:

This 7 pin connector replace the original connector that came on my camper that was not connecting good. This new one snaps in much better and does not come loose. I works very well.

Brooke M. profile picture
Etrailer Expert

Brooke M.

3/13/2025

Right on, Robert - glad to hear that :) where are you taking the camper to next? Any plans for spring?



by:

I like the features and build quality but should have done more research. It took three tries to get the wiring right. The product ships with 0 documentation. I downloaded a diagram off the web but misunderstood the orientation of the plug and wired it wrong twice before figuring it out. I’m old fashioned and expect instructions included. The etrailer online video did not show the inside or how to open/wire it. This is also my first attempt at trailer wiring. Work over a tarp- the parts are fiddly and you will drop a few. The connections are set up for bare wire or 0 & U shaped crimp terms.



by:

i like that this connector still has brass connections unlike other major brands that have went the cheap route.



by:

Perfect fit to change our trailer from a 5 pin to a 7 pin with added capabilities. we are long time etrailer customer and they always ship fast and have affordable prices to suit our needs.

Connie A. profile picture

Connie A.

8/21/2024

The rascal still works Fine!



by:

This is an improvment over the earlier model. It uses screw terminals instead of quick disconnects inside and a sturdier strain relief clamp. The previous one got crushed in too tight a turn. (not its fault)



by:

easy to install but i used wire crimped ends instead of bending wire around the internal posts. i also used heat shrink wrap to secure the 7 wire bundle tightly



by:

Fast service, great products, Had the 7 pin connector installed in about 30 min. It actually clicks when it is fully inserted. the charging station also was very easy since I had already run the wiring.Thanks Adam E,and e-trailer Rick



by:

Good product



by:

Parts arrived quickly and were very good quality. I will definitely use etrailer.com for all my trailer supplies.



by:

Worked well to replace one that was dam aged



by:

The video Andy provided left no questio ns.



by:

Perfect fit. Easy to use. Great product. Using this to help trickle charge a battery for the trailer winch.



by:

Works great!



by:

Great price, quality product



by:

Used this as a plug for my portable 12V air compressor to facilitate access to power, rather than clips to battery. As usual, over the past several years etrailer is my go-to store for all trailer & towing needs. Excellent variety, price and prompt service. Keep up the good work..............

Rw profile picture

Rw

3/13/2018

We installed the lights on a trailer we were selling. Installation went smooth, lights worked great.We install the trailer plug on a 12V compressor so we could power it from our trailer hook up and it works great also. You are our go-to trailer supply store.



by:

Wired it in and it works. Not much more to say. Works on my buddy's 2006 F-150 and on my 2003 Dodge Neon (yeah...you heard that right) and also on my 2016 Sierra Denali.



by:

Had to replace a 7 pin on an RV that got sheered by previous owner. The video on how to replace and the part made it very easy to change the connector. Saved a bundle doing it ourselves.

Em profile picture

Em

8/11/2015

Still going strong



by:

It would have been very helpful if the item description would have stated that the trailer connector was equipped with "Spade Contacts" and require Spade Connectors, and/or illustrate this in a picture, and provide those connector as part of the package. It would have saved a lot of time in making a second order to acquire the Spade Connectors.



by:

Once again etrailer came through for me with a quality replacement 7 pin connector plug. The installation was easy and the instruction videos were just what I needed to complete the task without unexpected problems. I had read other reviews saying the RV trailer wire colors did not match the pin color on the plug. My replacement plug pin colors matched exactly with the wiring colors on my RV.



by:

My utility trailer was fitted with a 4 pin plug, but both of my vehicles are fitted with a 7 pin round receiver. It was a hassle always looking for my adapter. This plug fit the bill, it's affordable easy to install, and etrailer is one of the few places I found it available.



by:

Works great, easy to install



by:

I was hoping for the terminal blade connectors, like the video shows, instead of the screw type connectors that I got. The blade connectors seem to be more reliable. Still, it's a quality plug, it's installed and it works. Thank you.



by:

For $5 I guess you get what you pay for. Already a slight crack from tightening the set screw. The color code must of been of been for an RV since its all different for my snowmobile trailer. It will work until I can find a better quality connector.

Mike L. profile picture
Etrailer Expert

Mike L.

1/17/2019

For something a bit more durable, a plug and lead connector like the ones Ive linked to would be a perfect choice. Keep in mind, theres more than one accepted wiring color code for a 7-way trailer connector, so be sure to pay attention to the color code listed on the products description page.


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Show More Reviews

See what our Experts say about this Optronics Trailer Wiring

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