1. Wiring
  2. Optronics
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 5 Flat
  6. Plug Only
Adapter 7 Pole to 5 Pole Flat - Molded

Adapter 7 Pole to 5 Pole Flat - Molded

Item # A75TB
lowest price pledge
Our Price: $19.35
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.22 lbs
Quantity: 
In Stock
Adapter 7 Pole to 5 Pole Flat - Molded Single-Function Adapter A75TB
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Lowest Prices for the best wiring from Optronics. Adapter 7 Pole to 5 Pole Flat - Molded part number A75TB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (133)
  • Q & A (100)
  • Videos (2)
  • Photos
  • Why etrailer?

Optronics Wiring - A75TB

  • Wiring Adapters
  • Single-Function Adapter
  • 5 Flat
  • Plug Only
  • Optronics
  • 7 Blade


5-Way Flat to 7-Way Round Adapter - Single Piece

This is an adapter that converts the tow vehicle's 7-way round blade connector into a 5-way flat pin connector. This model is a one-piece device with one connector on each end.



A75TB Adapter 7 Pole to 5 Pole Flat - Molded

Alternate part number: A-75TB




California residents: click here


Video of Adapter 7 Pole to 5 Pole Flat - Molded

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




Video Transcript for Optronics 7 Pole to 5 Pole Flat Adapter Review

Randy: Hey guys, it's Randy here at etrailer.com. Today we're going to be taking a look at an adapter plug. We get questions a lot about how people can convert a working 7-Pole on the back of their vehicle to work with a 4-Pole or 5-Pole trailer. That can have a lot of needs, either a trailering in its own. Maybe you've got a cargo carrier that has lights on it. Maybe you just got a little hitch cover that you want to illuminate at night, if it's a plug-in type.

This can really help take care of all of those needs.Basically this is going to provide us either a 4-Pole connection or a 5-Pole connection. The 4-Pole connection is going to offer your ground, it's going to have running lights, left turn signal and brake, right turn signal and brake, and the 5th Pole is for a reverse signal. That's going to be really good for marine trailer applications, when we need to lockout our surge coupler so we can back our trailer up. Or, also, if you plan on adding lights to your trailer. Maybe you're in a dark area and you can't see where you're backing your trailer into.

Throwing a couple lights on the back and wiring it so that signal through your Pigtail. Every time you hit reverse on your vehicle, lights will come on the back of the trailer and give you a good way to look around.Now, all in all this has a good, solid feel to it. It's not as heavy as what I felt out of some of the other 4- and 5-Pole adapters here, and it is a split case design. You can see it has that line that goes around, they're screwed together. Some of these are going to be molded.

I think the moldeds are a little bit heavier. They seem to be a little bit more rugged, overall. I like this adapter. I think it's going to work out fairly well. The part that fits into your 7-Pole is going to be brass.

It doesn't have a nickel coating on it. That can lead to a little bit of corrosion issues, but we recommend with all adapters that you use dielectric grease. This is going to give us a barrier and prevent moisture from getting in there. Without moisture, we don't have to worry about that dirt settling in there and causing corrosion down the road. So that's kind of a give or take with me. I'm going to grease anything I use, so I really won't have to worry about it.If you have a shrouded 4-Pole connector, meaning that your ends don't stick out like what our 4-Pole connector do here. It's got more of a black plastic wrap that goes around it. You'll have to trim the side of it as we fit these together. Let me show you here. With that 5-Pole sticking out there, as we stick that on the side of that cover, it is going to interfere. So you'd have to trim that side out. When removing it, ler me put this all the way in. As we remove it, the insert in here tends to move a little bit. You can kind of see how that moves.Now as far as customer reviews you, people really like this. They haven't had any issues that causing any kind of a problem. I like that it's got a nice handle on there. The one thing I think this lacks that we see on some that are very comparable to this one, is going be a tester. Going to be a few red lights that'll come on and indicate to you if you've got a problem, your trailer lights aren't working. It can verify for you that your truck's lights are. So you know your problem's on the trailer side, you basically eliminate half of the problem in the equation.As far as the installation goes, going to be just like a 7-Pole plug. We've got our tab on the top here. That needs to go behind the tab on the door, right in there. Then you'll bring your 4- or 5-Pole in, and that's simply going to plug in. At that point, you've got the lighting and the power heading back to your trailer, so you should be in good shape.Now as far as if I would own this particular adapter versus some of the other ones out there, I'd have to say that I think I'd go with a different one. I'd go with one that had a little bit more option to it, kind of like the Reese here. This is product number 78118. Basically, it's going to be a little bit larger. Both of them are easy to install, but I like the fact that this one gives me a 4-Pole and a 5-Pole option. So regardless of the type of plug I'm using, it's going to go in there without modification. And it does have the LEDs in there, that are going to tell me if my truck's working, if I have a problem. So, all in all, while I think this is a good adapter and it's going to work out in a lot of situations, I think I'd own the Reese before I'd own this one.


Customer Reviews

Adapter 7 Pole to 5 Pole Flat - Molded - A75TB

Average Customer Rating:  4.9 out of 5 stars   (133 Customer Reviews)


- A75TB
by:

Received product as expected (again). etrailer has proven to have items needed and provided reliably without any issue. 211180


Comments
You bet, thanks for the feedback. All purchasing experiences with etrailer have proven quite satisfactory. I wish all vendors provided such an experience. Etrailer is my go to place for anything they carry.
Dan M - 08/05/2016

19954

- A75TB
by:

My new truck has a 7 pole socket and a 4 pole flat for OEM trailer wiring. My boat trailer has a 5 pin flat, so this is Just what I needed at a good price. As usual etrailer got it to me promptly. Puged right in and worked with no hassel. 887270



- A75TB
by:

Haven't used it yet but it looks like exactly what I need. 851396



- A75TB
by:

Excellent product. Very Satisfied. No problems. 807821



- A75TB
by:

Just what I needed 791142



- A75TB
by:

Have yet to hook it up electrically to test it but physically fits my 2019 VW Atlas perfectly. 704364



- A75TB
by:

I'm extremely satisfied with the product and service. I run an automotive repair facility and it is very important that the products we use are factory fit. Etrailer did a great job helping us decide what we need and getting it to us promptly. 691623



- A75TB
by:

fit exactly as described. 679629



- A75TB
by:

Great adapter, my boat trailer has a reverse lockout that requires the extra pin for the reverse sensor to allow me to backup. 659023



- A75TB
by:

I’m very happy with this product as with everything I order from etrailer. This is my go to site for any thing to do with trailering parts. Good prices and good choice of different brand name products. Usually I find exactly what I need. 657999



- A75TB
by:

Works as expected - reasonable delivery...........as always! 652549



- A75TB
by:

Works Great 651218



- A75TB
by:

Just what I needed 650842



- A75TB
by:

This product works great. I will give it a 5 star ratting. 650333



- A75TB
by:

Just the part I needed at a good price. 646456


Comments
Still works great. Good price.
Kenneth - 05/25/2020

77510

- A75TB
by:

Product works exactly as expected. No c omplaints. 634432



- A75TB
by:

Good price, still works great, great service. Why look anywhere else. 630840



- A75TB
by:

Product works well, make sure you take if off when storing your trailer because people will want your adapter! All they have to do is order their own from etrailer! 615100



- A75TB
by:

works great 614400



- A75TB
by:

Works as expected. Have a tongue brake activator on my boat trailer that goes off when going into reverse to launch the boat and park. 592888



- A75TB
by:

Perfect 589854



- A75TB
by:

product was as described in catalog. completely satisfied. 573255



- A75TB
by:

Good fit and does the job. 557741



- A75TB
by:

Nice plug good quality 555064



- A75TB
by:

great price, works as should, thanks 551341


25
133
Show More Reviews

Ask the Experts about this Optronics Wiring

  • Adapter to Go From a 7-Way Socket on 2014 GMC Savana to Trailer's with 4- and 5-Way Flat Plugs
    There are 2 types of 7-Way vehicle side sockets, both are round, but the difference is the pins. You likely have a blade style 7-Way connector on your 2014 GMC Savana and for a 4- and 5-Way adapter you can use # A75TB. If your 7-Way has round pins and not blade style pins then we have adapter # 118709 which is a 7-Way round pin to 4-Way adapter. There isn't a 5-Way option if the vehicle has a round pin design. I have included a picture showing the different vehicle side 7-Ways for you.
    view full answer...
  • Is there a 7-Way to 5-Way Flat Adapter that as the 5th Pin for Electric Trailer Brakes
    The 5-Way flat on most boat trailers goes to an electric reverse lockout on a surge coupler (hydraulic brakes) so the adapters are set up that way. What I recommend is to replace the trailer side connector with a 7-Way such as # A7WCB which is going to cost less than an adapter anyway and you will be able to place the wires at the proper pins so that the electric brakes will work. I have linked a video showing an example installation for you.
    view full answer...
  • Adaptor for Going From 7-Way Blade to 5 or 4-Way Flat
    Sounds like you are looking for the part # A75TB which is a 7-way blade adapter to a 4 or 5-way flat. I attached a review video for more info on it as well.
    view full answer...
  • Does 7-Way to 5-Way Adapter # A75TB Fit 2020 Chevy Traverse 7-Way
    Yes, the 7-way to 5-way adapter part # A75TB that you referenced fits the factory 7-way you have on your 2020 Chevy Traverse.
    view full answer...
  • 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...
    view full answer...
  • Will a 7 to 5-Way Adapter Work with an Electric Reverse Lockout On a Surge Brake Trailer Coupler
    The center pole on a 7-Way trailer connector is the reverse light circuit. Provided that it is functional on your 2012 Toyota 4Runner, it will work with the electric reverse lockout on the coupler. You can use a circuit tester like # 40376 to determine if the center pole works with the reverse lights. First, apply the emergency brake and chock the wheels. Have someone start the vehicle and keep their foot on the brake and place the truck in reverse. Test the center pin on the 7-Way and...
    view full answer...
  • How to Activate Boat Trailer Surge Brake Lockout from the Factory 7-Way on a 2012 Toyota Tacoma
    It sounds like you have a factory 7-Way connector on your 2012 Toyota Tacoma and that you also have the dealer supplied electric brake controller wiring harness for wiring an electric brake controller in the cab of your vehicle. Since your boat trailer is equipped with surge brakes, you will not need to install an electric brake controller in the cab of your Tacoma. The first thing you should do is check the center pole, see photo, in the 7-Way connector on your vehicle with a circuit...
    view full answer...
  • Recommended 7-Way To 5-Way Flat Adapter For Surge Brake Coupler
    The Optronics Adapter 7 Pole to 5 Pole Flat - Molded # A75TB will give you the adapter you need between your boat trailer with surge brakes and your 2014 Chevy Silverado.
    view full answer...
  • Solution for Activating 5th Reverse Light Circuit on Trailer's Wiring
    The fifth circuit that the Adapter 7 pole to 5 pole part # A75TB carries is the reverse light circuit. So as long as the 7-way on your tow vehicle has this circuit activated the reverse light circuit would then carry over to the trailer's wiring. Replacing the 5-way on your trailer with a 7-way like the part # H20036 would also be an option worth considering. I don't like to recommend adapters for long term use as it's basically just another wiring connection which is where most wiring...
    view full answer...
  • Will the Adapter 7 Pole to 5 Pole Adapter Work On My 2018 Ford F150
    Yes, the Adapter 7 Pole to 5 Pole Flat # A75TB will work on your 2018 F150. The only requirement is that you have, or are going to add a working 7 way round blade connector on your truck. To use it, just simply slide the adapter into your 7 pole connector. Then the 7 pole becomes a usable 5 pole that will give you all the lighting signals you need, and also helps you to pick up the back up sensor.
    view full answer...
  • 5-Pole Flat Trailer Wiring Harness for 2016 Dodge Ram 1500
    We do offer wiring adapters that allow a vehicle with one type of trailer connector to tow a trailer with a different connector. All such adapters like # A75TB, which converts a 7-way RV style connector to a 5-pole flat, are shown on the linked page. These are fine for the short-term but since adapters mean more connections - and more connections can mean more problems - I suggest instead a 5-pole wiring kit that plugs right in to the U.S. Car connector at the rear of the Ram. You can...
    view full answer...
  • Reverse Light Circuit Does Not Work on 7-Way on a 2007 Chevy Silverado New Body
    If your trailer brake actuator has an electric lock out on it then you will need a working center pin on the 7-Way that is attached to the reverse light circuit on the truck. Since your truck has a factory 7-Way you can check the vehicle owners manual for the location of any fuses or relays related to the tow package wiring and/or reverse lights to determine if a fuse is blown or missing. I did see that you found the issue was a bent pin inside the connector. I do recommend checking...
    view full answer...
  • Availability of a 7-Way Round Pin to 5-Way Flat Trailer Connector Adapter
    It sounds like your Trailblazer had a 7-Way round pin connector and your Explorer Sport Trac has a 7-Way blade style connector. The configurations are different between the 2 different connectors. For an adapter, using the 7 Pole to 5 Pole flat, # A75TB, that you have referenced would work for you if the Ford has the blade style connector. I have included a picture that shows the differences between a 7-Way round pin and 7-Way blade style connector, vehicle side. If the vehicles both...
    view full answer...
  • 7-Way to 5-Way Adapter for Honda Ridgeline to Tow Trailer with 5-Way and Surge Brakes
    Since the Ridgeline has a 7-way connector already the only thing you need to connect it to the boat trailer with a 5-way is the adapter part # A75TB. All of the needed circuits will be present once this is installed so there would be no need to install any wiring harnesses. I attached a review video for this adapter for you to check out as well.
    view full answer...
  • 7 Way Flat to 7 Way Round Adapter Recommendation for Use In Norway
    I wish I had something direct that I could recommend for you, but honestly your best option would be to find a local vehicle-side trailer wiring connector, remove your current one and then wire it up to match the connector on the trailer you have. In the off chance that the 7-way rounds in Norway are the same as the style here in the US you could use a 7 Way RV-Style (Flat Pin) to 7 Way Round Pin # F77R. I attached a couple wiring diagrams that you can check out to see the
    view full answer...
  • 7-Way to 5-Way Flat Adapter Needed to Tow Boat Trailer with 2018 Ram 1500
    The Optronics Adapter 7 Pole to 5 Pole Flat # A75TB is exactly what you want for towing your boat trailer with your 2018 Ram 1500. This adapter carries the basic trailer lighting functions (running, left/right/stop, and ground) as well as the reverse light function that you need to activate the reverse lockout on your hydraulic actuator. As long as the reverse light function is active on your Ram (center pin) then you are good to go!
    view full answer...
  • Can Optronics 7-Pole to 5-Pole Adapter Also be Used with 4-Way
    A nice thing about 4-Way and 5-Way connectors is that they are compatible with each other. This means that the Optronics 7-Pole to 5-Pole Adapter # A75TB you referenced will work perfectly to convert the 7-Way on your F-150 for use with either the 5-Way on your boat trailer or the 4-Way connector on the other trailer. I have attached a short video demonstration on this adapter that you can check out as well.
    view full answer...
  • Will Optronics Adapter 7 Pole to 5 Pole Flat Work on 2013 Honda Pilot
    If you have a 7-Way connector installed on your 2013 Honda Pilot, the Optronics Adapter # A75TB referenced in your question will work perfectly to convert it to a 5-Way connector for your trailer. The unit will plug right into the 7-Way on your PIlot and provide a 5-Way connector on the other end. I have attached a short video demonstration on this product that you can also take a look at.
    view full answer...
  • Recommended Adapter For 2004 Silverado To Connect 7-Way To Junction Box On Trailer With 6-Way
    The 7-Pole to 6-Pole Adapter I recommend is part # 47549. The colors of the wires you have on the junction box on your trailer may not match the colors of the 7-way harness on your 2004 Silverado. We always recommend using a circuit tester like part # 40376 to check the function of the connectors for that reason. I have attached a link to a helpful article on wiring you can check out.
    view full answer...
  • Will 7-Way to 5-Way Adapter Part AT75TB Work with 4-Way Connectors as Well
    Yes, the A75TB, 7-Way to 5-Way adapter will also work with 4-Way connectors. It will leave the 5th pin exposed which can cause corrosion if you will be towing in the rain. Part # 37385 is another option. It has both a 5-Way and a 4-Way with covers to protect them from corrosion.
    view full answer...
  • Using a # A75TB 7-way to 5-pole Adapter to Tow Boat Trailer With 2013 Ford F150 w/ OEM 7-way
    Rather than using a 4-pole to 5-pole adapter such as # 47515 or # 20036, with the extra wire that needs to be tapped into the reverse light circuit, a 7-way to 5-pole adapter like the # A75TB would work much better. If the 7-way/4-pole connector on your truck is factory installed, the center pin of the 7-way should already be wired to the reverse lamp circuit of the vehicle. You can test this by having a helper place the transmission of the truck in reverse (while stepping on the brake,...
    view full answer...
  • Adding a 5-Way Trailer Connector to a 2008 Ford Super Duty and Trailer for Reverse Lights
    If your 2008 Ford Super Duty came with the factory installed 7-Way trailer connector then all you would need for it is a 7- to 5-Way adapter # A75TB. If your truck came with the factory 4-Way then you would need adapter # 20036 and the blue wire will splice into a reverse light wire on the truck. Then for the trailer you can install a 5-Way wiring harness # HM47910. The existing light wires can splice to this harness but for reverse lights you would need to add wire, # 16-1-1 sold by...
    view full answer...
  • Recommended Adapter to Convert 7-Way Blade Connector to 5-Pole Flat Connector
    We offer a range of trailer wiring adapters to let you join a vehicle with one connector type to a trailer with a different connector. The link provided will show you all options for adapters that convert from a 7-way blade-style connector to a 5-pole flat style connector. You can use a non-wired plug-type adapter like Optronics # A75TB, or if you prefer a wired-type adapter to give you a bit of slack you can use Optronics' 16-inch adapter # A57WB. For a heavy-duty coiled adapter you...
    view full answer...
  • Wiring Adapter to Join 6-Pole Round Connector to 7-Way Blade Style
    The adapter you can use to connect your Expedition's 6-pole trailer connector to your boat trailer that has a 7-way blade type connector is part # 337TC1067P.
    view full answer...
  • Compatability of the 7-way to 5-pole Connector with GM Avalanche and Hydraulic Surge Breaks
    If your Avalanche has the factory 7-way connector installed and working properly then the Adapter 7 Pole to 5 Pole Flat, item # A75TB, will work for you. The adapter will provide the 5 pole connection with the back-up circuit to lock out hydraulic surge breaks or power reverse lighting.
    view full answer...
  • Trailer 7-Way Junction Box for Connection to Reverse Lockout on Surge Coupler
    Surge couplers like your Titan Aero 6000 can have either a manually-operated reverse lockout or they can have one that uses an electrically-operated solenoid. Both types of lockout mechanisms block the flow of hydraulic brake fluid so you can back up the trailer without the brakes engaging. The model 6000 has a manual (lever-operated) reverse lockout but can be fitted with Solenoid Valve # T4748800 to convert it to an electrical lockout. If your actuator has two wire leads then it has...
    view full answer...
  • 7-Way to 5-Way Adapter Recommendation for 2016 Audi Q5
    For a 7-way to 5-way flat adapter we have the part # A75TB which would work perfectly for you. All of the circuits needed would pass through the adapter and give you the ability to use your reverse lock out solenoid.
    view full answer...
  • Compatibility of Tow Ready 7-way to 5-pole Adapter # A75TB with 2103 Toyota 4Runner
    The Tow Ready 7-way to 5-pole adapter that you mentioned, part # A75TB is not a vehicle specific item. As long as the 7-way on your 4Runner is fully functional, in most cases the adapter will work just fine for you. If your 4Runner has a bulb out sensor that warns you when you have a burned out taillight, and you are towing a trailer that uses LED taillights, you will need to use an adapter that has a load resistor installed in it, like part # TR20141. Either adapter can also be...
    view full answer...
  • Adapter to Plug Boat Trailer w/ 5-Pole Connector into Factory 7-way Connector on 2000 Ford F150
    If the hydraulic surge actuator on your boat trailer has an electric reverse lock out, you'll need a connection to the reverse light circuit on the truck. Look for a small solenoid located at the rear of the actuator with a wire tied into the trailer connector. Since your F150 has the factory tow package, the center pin of the 7-way should be tied in with the reverse light circuit. You can test this by using a circuit tester like # 40376 on the 7-way. The center pin should power up when...
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Mike L
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video Edited:
Jacob T
Video by:
Kathleen M
Video by:
Zach D
Installed by:
Randy B
Updated by:
Brian T
Updated by:
Noah M

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.