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7-Way Round RV Style Trailer Connector - Trailer Side

7-Way Round RV Style Trailer Connector - Trailer Side

Item # A7WCB

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Optronics Wiring - A7WCB
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  • Trailer Connectors
  • Trailer End Connector
  • 7 Blade
  • Plug Only
  • Optronics
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. Lowest Prices for the best wiring from Optronics. 7-Way Round RV Style Trailer Connector - Trailer Side part number A7WCB can be ordered online at etrailer.com or call 800-298-8924 for expert service.


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  • Reviews (131)
  • Q & A (102)
  • Videos (2)
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  • Why etrailer?

Optronics Wiring - A7WCB

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.


Features:

  • 7-Way round plug lets you connect your trailer to the 7-way round blade connector of a tow vehicle
  • Interlock system locks in place to keep connections secure
  • Over-sized finger tabs allow you to easily grip the plug during disconnections
  • Adjustable insert tightens against wires to limit exposure to dirt, dust, and water


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

Alternate part: A-7WCB







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 Optronics Wiring - Trailer Connectors - A7WCB Review

Today we'll be reviewing part number A7WCB. This is the Optronics Seven Way Round Army Style trailer connector. This is a round plug that connects with the seven way round blade connector of your tow vehicle. See here that it has a nice ABS plastic housing so it's going to be very strong and very durable. It's got the connections up here. You also have the interlock system so once you make the connection this will actually lock in place for a nice secure hold. You have the over sized finger tabs right back here that's going to allow disconnecting to be very simple and effortless. You have a couple of set screw back here.

That's just going to control that insert. That's going to really help keep dust and moisture out of the connection points once you have your wires ran through there. You just tighten that back up and that insert's going to close up against the wires providing a nice, secure fit. You have another set screw here on top. That's going to allow this connection point to actually come out of the housing. You run your wires through, get this portion out, make your connections, put it back in, and then reset the screw up top and the screws here on the back. That' s going to do it for our review of part number A7WCB.

This is the Optronics Seven Way Round Army Style trailer connector. .


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (131 Customer 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.

- A7WCB
by:

High quality, easy plug and unplug acti on. 568664



- A7WCB
by:

I received this product in only a few days and its well built and replaced my previously damaged piece perfectly without drilling new mounting holes. 447146



- A7WCB
by:

It's ok, it's plastic, but was cheap. 470897



- A7WCB
by:

Nicely made. Easy to wire. Works great. 426675



- A7WCB
by:

Very well constructed connector, very easy to swap out for my old, tired, cracked, and corroded connector. Ed 471487



- A7WCB
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.............. 352311


Comments

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.

RW - 03/13/2018

35860

- A7WCB
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. 145947


Comments

Still going strong

EM - 08/11/2015

14125

- A7WCB
by:

I know it is just a trailer connector But! The great part is Etrailer's ability to get me the part, sell it to me at a good price and deliever it on time and with good packaging. That is why I buy from Etrailer and not the other guys! 208760



- A7WCB
by:

Perfect fit. Easy to use. Great product. Using this to help trickle charge a battery for the trailer winch. 214977



- A7WCB
by:

Converted my trailer into a 7 wire, with the help of this connector and etrailer's how-to videos. Easy installation and good quality. 122786



- A7WCB
by:

Great price...great service. Easy Load will be reordering soon. 569566



- A7WCB
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. 233378



- A7WCB
by:

I've only been buying from etrailer for about a year now but I'm very pleased with the service and parts I have bought from them and they have the fastest shipping I have ever seen. Thank you 455602



- A7WCB
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. 336627



- A7WCB
by:

This seven way trailer connector is labeled incorrectly according to my plug factory installed in 2010 Superduty! Had to replace two fuses and two relays. After wiring plug same as truck worked fine. 222296



- A7WCB
by:

The only reason I do not give you 5 stars is because your web site. When internet ordering, it should instantly state when a part is out of stock. Even nicer would be expected restocking dates. The parts received were exactly what I ordered for my electric brake conversion from surge brakes at far less expense than reparing the internally rusted surge brake system. There was a plethora of information on your web site to assist me in ordering the correct parts for the conversion. Plus there were videos to see how to complete the conversion and how parts were installed and adjusted. Customer service was excellent. 659636



- A7WCB
by:

Worked as described, very solid product, easy to connect. 654577



- A7WCB
by:

Great Products at a great price along with great shipping!!!!! Wish I could give 6 stars!!!! 653659



- A7WCB
by:

Works great! 641085



- A7WCB
by:

Nice plug 637677



- A7WCB
by:

Good 637007



- A7WCB
by:

Basic item works as intended and has not had any issues. 635639



- A7WCB
by:

Just what I ordered 609389



- A7WCB
by:

good product 600963



- A7WCB
by:

great product 600984



- A7WCB
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. 598173


Comments

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.

-- Mike L - 01/17/2019

48651

- A7WCB
by:

Its a well fitting plug. 592680



- A7WCB
by:

Works Great 590576



- A7WCB
by:

works great! 589666



- A7WCB
by:

great product and service 583351



- A7WCB
by:

top shelf products and service 583348



- A7WCB
by:

great product, professional crew at etrailer. thanks. 570171



- A7WCB
by:

Everything is good, good place to shop. 550554



- A7WCB
by:

eTrailer is super easy to work with. On time deliveries and great pricing. Thanks for great service George J. I will be ordering more items soon. 505049



- A7WCB
by:

worked as promised one year later. 503425



- A7WCB
by:

in trailer with pos/neg wires hooked up so i can run small amp dc items from vehicle plug. 496518



- A7WCB
by:

Nice product. The only thing I would comment on is that if you use really large wire like on a semi trailer the threads on the back that hold the wire secure to the plug tend to pull but I counter sunk them a little more and no problem. Good product. 490646



- A7WCB
by:

Product received on time. Thanks. 474708



- A7WCB
by:

Great quality exactly what I was expec ting 469522



- A7WCB
by:

love it 467839



- A7WCB
by:

Good deal 457733



- A7WCB
by:

Well made plug with nice terminals for stranded wire. 449523



- A7WCB
by:

Arrived in perfect condition, works great !! 445083



- A7WCB
by:

Good quality and easy to install. 443176



- A7WCB
by:

Received the trailer connector and it was just as described. Haven't had a chance to install it yet, but the quality looks good. 430812



- A7WCB
by:

YOUR STANDARD TRAILER PLUG. COLOR CODES ARE ONLY MOLDED ON INSIDE TERMINALS FOR ID. AFTER REPLACEMENT I PAINTED THE COLOR CODES AT EACH SPADE ON OUTSIDE FOR EASY TROUBLE SHOOTING. 430007



- A7WCB
by:

Product arrived on time. Very satisfied. 423186



- A7WCB
by:

Updated slide in truck camper plugs. Fast shipping, accurate description, and great price. 414577



- A7WCB
by:

new connector did the trick - trailer lights work again! 413315



- A7WCB
by:

gREAT SERVICE!!!!! 413310


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131
Show More Reviews

Ask the Experts about this Optronics Wiring
Do you have a question about this Wiring?


  • Wiring Electric Jack to Plug Into 7-Way on Tow Vehicle
  • Although wiring an electric jack like the etrailer.com # EJ-3520-BBX you referenced to a dedicated battery on the trailer is the preferred solution for ensuring you get the needed power, you can indeed wire it to a 7-Way plug like # A7WCB for it to be connected to the 7-Way on your truck when needed. If you don't yet have an electric jack, we actually have a 3,500 pound unit available with the Buyers Products # 3370093500 that is designed to be used this way right out of the box. This...
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  • Parts Needed to Add a Brake Controller on a 2013 Jeep Grand Cherokee With or Without the Tow Package
  • Since you don't have the trailer towing package on your 2013 Jeep Grand Cherokee you do need to start off by installing a 4-Way connector. I recommend the Tekonsha T-One # 118425 as we have found Tekonsha to be one of the most reliable wiring companies that we carry. To have 7-Way and 4-Way connectors on your Jeep you also need the Universal Wiring Kit # ETBC7. This connects to the T-One and give you both connections that you need. It also includes everything you need for the 7-Way to...
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  • 7-Way Trailer Socket to Mate with Plug A7WCB
  • Part # A7WCB uses a connector format known as an RV-style 7-way blade. Although the plug itself is round the actual electrical contacts are flat or blade style. This male plug mates with a female socket such as # 37185 or # 30717. I am not familiar with the DTS brand but I presume it is the maker of the connector you have. My contact at Blue Ox confirmed that the threaded rods on the crossbar can be bent to fit a wide range of 6-way and 7-way trailer socket mounting hole spacing. I...
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  • How to Make a 25 foot Long 7-Way Wiring Harness
  • We have what you would need to make a 25 foot long 7-way harness. You would need the part # DW04914-1 which is jacketed 7-way wiring sold by the foot. And then for a connector part # A7WCB.
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  • How to Tow a Jayco Trailer with a 6-Way Square Connector with a Vehicle that has a 7-Way
  • Sounds like you have a 7-way connector on your 2009 Pilot and are looking for a way to connect it to your Jayco pop up that has one of their square style 6-way connectors. Since there isn't an exact adapter for what you are trying to do your best option would be to remove the square connector from the trailer and install a # A7WCB in place of it. This will allow your trailer to be towed much easier by other vehicles in the future as well. You will want to verify the functions of the...
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  • Parts Needed to Make Shorter 7-Way Male to 7-Way Male Adapter
  • To make an adapter like you are looking for would require the part # H20043 which is a 7-way with 4 feet of wires that you could then wire to a 7-way male like part # A7WCB. The # H20043 could be shortened to whatever length you needed as well. I attached a chart that shows the wiring colors for the # H20043 plus a diagram for a typical 7-way to help you wire up the adapter.
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  • 7-Way Male to 7-Way Male Adapter Recommendation that is 4 Feet Long
  • To make an adapter like you are looking for would require the part # H20043 which is a 7-way with 4 feet of wires that you could then wire to a 7-way male like part # A7WCB. I attached a chart that shows the wiring colors for the # H20043 plus a diagram for a typical 7-way to help you wire up the adapter.
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  • How to Tell if Trailer Has 6-Way or 7-Way Installed
  • It sounds like you have a 7-way blade connector on your boat trailer as that is a very common connector on boat styles. This connector has 6 pins around the outside of the connector and a center pin for a total of 7. Part # A7WCB would be what a 7-way would look like. If you had a 6-way it would look like part # PK11604.
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  • Installing 12V Power On Ford F-150 7-Way Trailer Connector
  • You do not need to connect the 12V power connection on your F-150 7-way. That power is only required if you want to charge a trailer battery while towing or if you are using an electric device on your trailer like a powered sway control or wireless brake controller. It is likely that a fuse or relay needs replaced for the factory function if it was recently interrupted. I recommend checking your owner's manual for fuses and relays associated with this function. If you want to add that...
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  • 7-Way Plug Recommendation for Replacing 4-Way of Hitch Light Fixture
  • What you described is a very good idea. You could just cut off the 4-way of the light and then wire it to the part # A7WCB and you'd be good to go.
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  • 7-Way Recommendation for Activating Trailer Brakes on a Trailer with a 5-Way
  • Typically, the 5th circuit of a 5-way is for a reverse light circuit. I have a solution for you, but you will not be able to use the Adapter 7 Pole to 5 Pole Flat # A75TB to activate your trailer brakes as it has an empty port where the brake output circuit would be on your tow vehicle connector. I would recommend you confirm that the fifth circuit on your trailer is actually for trailer brakes. You can do this by tracing the wires back from the connector and see if they go to the brake...
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  • Recommendation for Submersible LED Backup Lights on a Boat Trailer
  • I can help you add reverse lights to your trailer. Yes, It is important to pay attention to DOT compliance when adding lights on your boat trailer. Compliance will be met if you use the Optronics # BUL10CB light as your backup light. The # BUL72CB is purposed for a utility light and will not meet the criteria for reverse lights on the roadway. In order to add reverse lights to your trailer would would need to have a 7-Way on the trailer and a 7-Way on the vehicle. On the vehicle...
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  • Parts Needed to Add Electric Brakes to a Utility Trailer with a 3500 Lbs Axle and Brake Flanges
  • You will need several items to add electric brakes to your Carry-On Utility trailer. Starting with the trailer you will need a hub and drum that matches the bearings and seal on your trailer spindle and your wheel bolt pattern. The only way to be sure is to check the bearing part numbers and seal part number, but with a 3,500 lbs Dexter axle that has brake mounting flanges you will most likely have the # L44649 Outer and # L68149 inner bearings and # 58846 seal. If these are the correct...
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  • Recommended 7-Way Trailer Connector for Both Trailer and Tow Vehicle
  • It looks like you found the trailer-side 7-way, part # A7WCB. If you need the wiring and connectors as well use part # ET7WK instead. The installation will be much easier. In order for me to recommend the parts you need to add a 7-way connector to your tow vehicle I'll need to know the year, make, and model of it. Also, is there a 4-way on the vehicle now or is there no trailer wiring at all? If you already have a 4-way connector you can use our # ETBC7 kit to convert it to a 7-way....
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  • Flat Towing Setup Recommendation for a 2014 Honda CR-V
  • We have everything you would need to flat tow your 2014 Honda CR-V. First lets start with a base plate kit as that is the attachment point on the vehicle. For that you would want the Blue Ox Base Plate kit part # BX2258. I attached an install video for you to check out as well. The Blue Ox Alpha # BX7365 is the most popular tow bar we offer that has been confirmed to work with the base plate kit so it should work very well. It also comes with safety cables. For trailer wiring you...
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  • Troubleshooting Electric Trailer Brakes Not Registering With the Brake Controller
  • I can help you troubleshoot your brake controller error. Sounds like a grounding issue to the brake magnet ground. I would make sure that the ground wire is secured tightly to a clean surface on the frame. If the wire is attached to the body or a surface with an undercoating or rust it can cause a ground problem. I recommend cleaning the area or finding a better grounding spot for the wire. Another option would be to run all the grounds to the front of the trailer where the main ground...
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  • Can I Charge My Trailer Battery Using 7-Way Trailer Connector on Truck
  • You would not be able to charge your battery through the wiring on your 4-way trailer connector. Since your truck has a 7-way connector, you could maintain the power to the battery but not charge it. To begin, you would need to cut off your 4-way trailer connector and install a 7-way connector on the trailer like the Optronics 7-way, part # A7WCB. You would need to connect the appropriate wires. White is ground, Yellow is left turn and brake, Green is right turn and brake, and Black...
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  • Adapter to Convert 7-Way Blade Style Connector on Vehicle to 7-Way Round Pin Connector on Trailer
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  • How to Connect Vehicle with 7-Way to Trailer with 5-Pole Flat Wiring for Surge Brake Lockout
  • The best long-term wiring solution for connecting your vehicle that has a 7-way and your trailer that has a 5-pole flat is to install a 7-way male plug on the trailer wiring. This lets you avoid adapters like # 787196 which can become unreliable over time. We have parts like # PK12706, # A7WCB and # 54-77-003 (and others) shown on the linked page that connect to the trailer's existing wiring to give you a plug that directly matches the 7-way on your Pilot. Another better option is...
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  • Wiring And Flat Towing Recommendations For 2004 Jeep Cherokee Towed With Motorhome
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  • Trailer Lights Stay on Once Vehicle Ignition is Shut Off
  • I suspect your problem is caused by a damaged or corroded trailer connector. Take a look at your trailer connectors, both the socket on your truck as well as the plug on the trailer. Look for green or white corrosion on the pins or sockets of the connectors. If corrosion is visible, there is a strong possibility that the corrosion has spread to the interior of the connector. The terminals that each individual circuit connects to are very close together, if corrosion builds up on the...
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  • Does 12V Pin on 7-way Trailer Connector Always Have Power
  • It sounds like you're asking about the 12V circuit on the 7-way trailer connector on the rear of your 2003 Chevrolet Trailblazer. Some vehicles will always have power and some others will not. We don't have this specific information for your vehicle, but to determine if your 12V always has power you can test the pin in the 1 O'clock position on your 7-way. The other pins will have power when the corresponding light is used or the brake pedal is pressed.
    view full answer...


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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael L
Video Edited:
Zack K
Video by:
Andrew K
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Installed by:
Rick A
Expert Research:
John H
Expert Research:
Brandon M
Expert Research:
Adam R
Installed by:
Cole B
Updated by:
Brian T

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