Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade
(134 reviews)
Price: $21.92
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Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade
Item # PK12-724
Retail:$53.09
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- Reviews (134)
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Pollak Trailer Wiring - PK12-724
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug and Lead
- 7 Round - Round
- Pollak
This adapter plugs into your vehicle's 7-way, round-pin receptacle to adapt it for use with a trailer-end, 7-way, RV-style plug. The 7-way flat receptacle includes a hinged cover to keep dirt and moisture out of the connection.
Features:
- Adapter converts your 7-way, round-pin vehicle-end connector for use with a 7-way, RV-style trailer-end connector
- Lets you tow a trailer with a 7-way blade plug
- Works with any RV-style, 7-way plug
- Connects ground, left turn, right turn and stop circuits
- Round, floating, solid brass pins in plug
- Ensure minimum voltage drop
- Align easily for maximum contact
- Spring-loaded, hinged door on socket to protect the interior from dirt and moisture
- Collar with 4 mounting holes lets you mount the socket to your bumper
- Plug is constructed of glass-filled nylon
- Socket is constructed of high-impact, ABS thermoplastic
Specs:
- Overall length: 14-1/2"
- Length between plug and socket: 7-1/2"
- Wire configuration:
- White: ground return
- Black: clearance, side marker and identification lights
- Yellow: left turn signal and hazard signal
- Red: stop lights and anti-lock devices
- Green: right turn signal and hazard lights
- Brown: tail light, rear clearance marker and license plate light
- Blue: auxiliary circuit/ABS power
- Wire gauge:
- White: 8
- Red, blue: 10
- Black, yellow, green, brown: 12
- 1-Year limited warranty
Note: If your 7-round plug is wired separately (brake light and turn signals on different wires), this adapter won't work.
12-724EP Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade
Customer Reviews
Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade - PK12-724
Average Customer Rating: 4.8 out of 5 stars (134 Customer Reviews)
This adapter plugs into your vehicle's 7-way, round-pin receptacle to adapt it for use with a trailer-end, 7-way, RV-style plug. The 7-way flat receptacle includes a hinged cover to keep dirt and moisture out of the connection.
- PK12-724
by: Elmer Platz08/19/2019
I received this item in a plastic bag, for a few moments i wondered if it was a knock-off. I had done my home work and was sure that this item would be compatible with the socket on my John Deere 2013 5085M at the time I ordered it, not so. The 'holding ridge' at the plug-in end was not in the right position when fully inserted into the plug on the tractor. I sent multiple pictures to Pollack Technical Support but they were unable to assist me. I finally modified the item myself (something I really hate to do) so that it would fit the plug-in and be 'grasped' by the cover/holder on the tractor side. As I anticipated, the thickness of the plastic was inadequate to make the adaptation 'sweet', so I had to cover the resulting hole with silicone caulk.
- PK12-724
by: Billy06/07/2021
Well I was hoping that the product was gonna take my 7 pin round 3 wire system on my truck and turn it into a 7 blade round 2 wire system for my trailer. But it doesn't Convert my system from a 3 wire to a 2 wire. But it does go from a 7 pin round to a 7 blade round.. So Ive ordered the converter to fix my problem.
- PK12-724
by: Brad04/27/2021
My trailer connector works great. Because I live a ways from town it was great to order it online and have it shipped. It arrived quickly. One note: When I was in town I did see the same connector at NAPA for the same price. All things considered, I'm happy with my purchase and would order from etrailer again.
- PK12-724
Rachael H - 06/23/2018
by: Charles06/01/2018
This is a great solution for adapting RV blade connector to 6 pole connector. I give it 5 stars. I use this for work purposes, and have found one issue that I DON'T believe to be manufacturer defect. In my industry we use different trucks and trailers daily, if not hourly. Some trailer electric brakes will lock up when adapter is connected. I have found the red wire in the adapter to be the problem. My solution was to splice in a switch so that when the intermittent problem arises I can flip the switch and be on my way.
Comments
Thanks for the information Charles, I did want to let you know that there are two differnet wiring configurations for these 6-way connectors. Sometimes the red wire that you noted as the brake connector point can also be pinned as the 12V power wire. This would then activate the brakes, as you noticed. Your solution while it worked for your application is not something that we generally recommend for our customer in case they forget to flip the switch and are then towing without brakes on their trailer. For that instance we recommend repinning the connector and changing the 12V and Brake pins to correspond to the correct functions.
-- Rachael H - 06/23/2018Trailer Wiring Diagrams
![Trailer Wiring Diagrams]()
- PK12-724
by: Kevin03/03/2022
Works as described, serves it's purpose.
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by: Dusty08/02/2020
It’s a great product but not for my intended reason. It just adapts round pin to flat pin. I was looking for an adapter from commercial truck to RV trailer. Additional wiring is required to convert commercial to RV, gooseneck, etc.
- PK12-724
by: Duane07/28/2018
Have a '79 Dodge with the older style 7 round pin Pollack connector and bought a new camp trailer with the 7 pin spade connector...needed an adaptor. Their PK12-724 was the perfect fit! Well built, and works perfectly! Etrailer.com has fast order processing too. Very satisfied with the product, price & service!
- PK12-724
by: NorCalBruce06/02/2017
Got it just when it said it would be here. The 7 into 7 plug that was ordered is already on the truck an trailer. Thanks Guys.
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by: John06/13/2018
Adapter is, as described. Fits and works perfectly. This adapter allows our dump trucks to hook up to our smaller trailer harnesses. We recommend this product, for this application.
- PK12-724
by: Eddie02/21/2013
This item is high quality but the real "value" here is the outstanding customer service that etrailer provided. The 7 pin round plug provided didn't fit my 7 pin round socket and they went out of the way to research the difference in my socket and their plug. Great company.
Comments
I still like it fine but I dont use it much.
-- comment by: Eddie - 02/27/2014
- PK12-724
by: Alex04/10/2019
Exactly what I needed to hook a conventional trailer to our new bucket truck without cutting the wiring up to get rid of the rare 7 pin socket.
- PK12-724
by: Richard P.02/15/2018
Rather a difficult set up to find. Tried calling several other vendors, and most weren't able to fully comprehend what it was I needed. Called etrailer and not only were they able to know what I was talking about, they had it in stock and I had it in my hands within two days. Personnel are always superior in every aspect of customer service and basic human interactions. Which has become far less of a normal occurrence in this world. I will continue to use etrailer and spread the word on their great performance and excellent product lines.
- PK12-724
by: Ronald09/14/2018
Fit like it should but I have to run wires down to see how previous owner wired it as they hooked into factory plug and ran another horse trailer like plug on bumper.
- PK12-724
by: Tim R.07/12/2020
seemed to be a good product , the only problem was going from 7 pin round semi connector to 7 pin rv style the trailer brake circuit did not line up , some rewiring was required so it would work with the brake controller ( if i would have i checked your website i would have known it sooner , no problem figured it out ) used truck and trailer alot since , no problems so far
- PK12-724
by: James02/07/2019
I bought this to connect my John Deere 5085 Tractor (7 pin) to a PJ dump trailer (7 blade) and it works perfectly. I highly recommend this as it works and the Hopkins version did not for this application.
- PK12-724
by: Richard06/13/2019
Great Harness worked great on my old factory 1992 Ford F-350 trailer harness.
- PK12-724
by: Mary T10/10/2017
We are so glad we found etrailer.com! We have never ordered an incorrect part because their info - and large bank of Q&As - has always told us everything we needed to know. I wanted to share our experience with the Pollack 7-way blade to 7-way round connector, part PK12-724. When researching for the correct part, we found a question from a buyer who had the same/similar vehicle, a 1993 Ford F-150 with a factory tow package. He was told to buy the PK12-724 but to cut the red and blue wires and cross-connect them. (This was info we we so glad to have!) We did so, and most everything worked except the trailer back-up lights came on whenever the lights were turned on. We mentioned it at the RV place when we were there, and they checked it for us. Turns out that not only did we have that issue, but our trailer battery was not charging when hooked up and truck running. So on the blade end of the connector, they moved some of the wires around (see included illustration), and voila, everything now works correctly! I hope this is helpful to others. I believe the truck information is the most important info for this fix, but FYI our Trailer is a 1994 Komfort 27.
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by: Steven11/05/2021
Seems like it should work OK.
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by: Mike06/16/2021
Works I need this to go from my John Deere tractor to my dump trailer
- PK12-724
by: Steven11/02/2018
very satisfied, not only with the items i bought but also etrailer, very easy to order, cant beleve how fast i goy it plus they even sent a followup email. GREAT COMPANY TO BUY FROM
- PK12-724
by: Carl10/05/2015
This adapter saved me a ton of headaches and time! I have a 1986 GMC K3500 that I tow with. I had an out of town event and a borrowed trailer I would be using. This adapter allowed me to just plug and go using my existing wiring set up. It performed flawlessly! I especially liked the built in tabs that lock in using the existing spring loaded cover to secure the plug in place. No worrying about the plug loosening up during the trip. The story would not be complete if I did not also mention the great customer service that helped me get this adapter when I needed it!
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by: WM01/10/2017
The adapter harness eliminated time & grief to replace/re-wire the commercial style plug on a farm tractor, allowing use of tail, turn, and brake lights on trailers with blade type connector. Works great.
- PK12-724
by: Austin R.12/22/2014
Product was exactly as described, and fit the unique need to convert the 7 pole to 7 blade trailer light system. This saved rewiring the vehicle and/or trailer.
- PK12-724
by: David07/21/2020
All of our trucks come wired with round pole trailer plug and some of our trailers take 7 spade style this adapter solves our problem and is cheaper than buying the parts and making them our selves.
- PK12-724
by: Marco04/23/2017
The 14 inch extension 7 prong pigtail arrived very quickly as described. This is going to work perfect as I need the power cord from the trailer to the truck to be less than a foot longer to make the connection. Thanks for the really quick delivery on the perfect fix!! It appears to be very well built. Marco
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Ask the Experts about this Pollak Trailer Wiring
- Pin Designations of the 7-way Round and the 7-way Flat on the Pollak 7-way Flat to Round AdapterI have attached a diagram that shows the pin designations for the Pollack 7-Pole Round to 7-Pole Flat Trailer Connector Adapter, # PK12-724. I labeled the pins as they relate to the RV side 7-way blade connector. The 7-way round pin connectors typically have different pin functions than RV style 7-way blade connectors. You may want to make sure the 7-way connector on your tractor is wired properly to match the functions of the adapter to ensure everything works correctly on the trailer.
view full answer...
- Troubleshooting Trailer Brake Lights that Do Not Work When Parking Lights are Switched OnIt sounds like you have a poor or insufficient ground connection. The dead giveaway is that everything works okay unless the parking lights are on. When the parking lights are on, you are drawing near the maximum amperage through the trailer wiring, which is when a ground problem will manifest itself. Check the ground connections on both sides of the tractor/ gooseneck attachment. Make sure that the ground connection for the connector on the tractor and the trailer are secure and not corroded...
view full answer... - Is it Possible for the Pollak Trailer Connector Adapter # PK12-724 to Burn OutThere are no circuits inside the Pollak Trailer Connector Adapter # PK12-724 that you referenced to burn out. I would imagine that if enough amperage was run through this unit to melt the wires you would probably have problems elsewhere on the tow vehicle and trailer wiring. If you are having problems with this product you might inspect it to make sure it is clean and free of corrosion so that it will make good contact with your wiring circuits. I also attached an FAQ on trailer wiring...
view full answer... - 7-Way Adapter Recommendation to Go From Semi Truck 7-Way to RV 7-WayThe part # PK12-724 is designed to plug into a 7-way round connector like what your semi-truck has and provide you with a 7-way blade type connector for your RV 7-way.
view full answer... - Availability of Adapter to Go From 7-Way Round to 7-Way FlatWe have the part # PK12-724 which is an adapter that goes from a 7-way round to a 7-way flat.
view full answer... - Adapter to go from 7-Way Round Pin on 1993 Ford F-350 to a 7-Way Blade Style Connector on a TrailerThere is an adapter to go from the 7-Way round pin connector on your 1993 Ford F-350 to a 7-Way blade style connector for the trailer. It is Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade Item # PK12-724. Assuming that your 7-Way round pin and the 7-Way in your truck bed are both wired to each other (which is very likely) all the functions, including the brake output circuit, will function when using this adapter.
view full answer...
- Can the Pollak Trailer Connector Adapter PK12-724 Be Used UnmountedIf you didn't want to permanently mount the # PK12-724 you could easily leave it hanging. As long as it doesn't drag the ground when traveling you would be fine.
view full answer... - Adapter Needed from 7-Way Round on Tow Vehicle to 7-Way Blade on TrailerI'm not too familiar with semi trailer wiring but I believe that you have a connector with a 7 round pin configuration like I highlighted in the top right of the attached picture. To get to the 7-Way blade connector (also highlighted in the picture) that is on your gooseneck trailer you need the adapter # PK12-724. This allows you to retain the wiring and connector on your semi trailer while being able to power up your gooseneck trailer.
view full answer...
- Right Brake Light Quits Working When Hooked To Race Car Trailer.I would start the troubleshooting by inspecting the tail light connection to ground. It should be without paint or corrosion. You should also check out the tail light bracket connection to the trailer frame. If the bracket is bolted to the trailer frame there may be rust and corrosion inhibiting the ground connection. Finally, check to make sure the actual connectors on both the truck and trailer are clean and free of corrosion. A bad ground or dirty connections are the two most common...
view full answer... - Does Pollak Trailer Connector Adapter # PK12-724 Carry Charge Circuit for BatteryThe center pin of the Pollak Trailer Connector Adapter # PK12-724 carries the 12 volt power circuit so yes this does carry the circuit needed to charge battery.
view full answer... - Pollak 7-Way Round to 7-Way Flat Adapter RecommendationIf your vehicle has a 7-way round connector like a Pollak Heavy-Duty, 7-Pole, Round Pin Trailer Wiring Socket # PK11720 then you could use a Pollak Trailer Connector Adapter # PK12-724 to allow you to tow a trailer with a flat 7-way connector. I also attached an FAQ article on wiring for you to check out also. I would recommend you test the 7-way on your semi and determine if the 7-way has separate or combined tail light circuits. If you have separate circuits on the trailer connector...
view full answer... - Converting 7-Way Round Connector on Ford F-750 to 7-Way Blade Style Connector on a TrailerTo convert your 7-way round connector to the 7-way blade style connector on your trailer we have Pollak Trailer Connector Adapter part # PK12-724. To use this adapter you should not have to splice together your separate brake light circuits on your Ford F-750. The power output at your 7-way trailer connector on your truck should already be wired as the diagram I have provided. I recommend using a circuit tester to test the pins of the 7-way trailer connector on your Ford truck. If your...
view full answer...
- 7-Way Round to 7-Way Blade Adapter Recommendation for a 1993 Ford F150 Towing Travel TrailerWhat you have on your 1993 Ford F150 is a round 7-way, and it sounds like your travel trailer has a blade style 7-way. All you need is the correct adapter and you would be good to go. For that you would want the Pollak Trailer Connector Adapter # PK12-724. You will need to cut the red and blue wire and reattach them opposite. So the red wire to the blue wire and the blue wire to the red wire so that the wiring matches what you currently have.
view full answer...
- Trailer Wiring Adapter Recommendation for going from a 7-Way Round to a 4-Way FlatSounds like your Eager Beaver trailer has a 4-way trailer connector and your dump truck has a 7-way round. All you need is the correct adapter. For that you would want the Pollak 7 Pole Round Pin to 4 Pole Flat Wiring Adapter # PK12742.
view full answer... - Adapting a 7-Way Round Pin Connector on a 1992 Ford F-150 to 7-Way Blade Style ConnectorTo adapt a 7-Way round pin vehicle side connector to a 7-Way blade style connector use adapter # PK12-724. The adapter will route the functions to the proper pins on the output side so you would not have to move any wires around.
view full answer... - Trailer Connector Adapter for a John Deere Tractor with 7-Pole Round Trailer ConnectorI have attached a photo of what I believe you have on your John Deere Tractor. If that is the case then this is what is referred to as a 7-pole trailer wiring harness and in order to then adapt this for use with a 7-blade trailer connector you would want to use the Pollak Trailer Connector Adapter part # PK12-724. If this is not what you have please send me a photo and I would be glad to see if we have a better option for you. I have attached a review video for you as well.
view full answer...
- Adapter to Go From a 7-Way to a 12 Volt Power OutletI did some digging and it looks like the LS tractors sometimes had 7-ways installed on them like RVs. So for an adapter to go from a 7-way to a 12 volt power source you'd just need the part # PK11896 and you'd be set.
view full answer... - Is There a 7-Pole Round to 7-Way Blade Adapter AvailableThere is one available. You are wanting the Pollak Trailer Connector Adapter - Vehicle End - 7-Pole Round to 7-Way Blade # PK12-724. One thing to note is that if your 7-round plug is wired separately (brake light and turn signals on different wires), this adapter won't work..
view full answer... - Is There a Difference Between 7-Way Round and 7-Way Blade ConnectorSo the round 7-way is more common on heavy duty setups whereas the blade style 7-way is much more commonly used on the lighter duty RV setups. Aside from compatibility there really isn't a significant difference. You could use a 7-way round to 7-way blade connector like the part # PK12727 if ever needed.
view full answer... - 7-Way Round to 7-Way Flat Trailer Adapter Recommendation for a 1993 Ford BroncoAs long as the 7-ways on both your 1993 Ford Broco and your Fleetwood camping trailer are wired up like the diagrams I attached the Pollak Trailer Connector Adapter # PK12-724 that you referenced would work as-is without having to be rewired. I also attached a review video for this adapter.
view full answer...
- Why Wouldn't 7-Way Adapter # PK12-724 Allow Stoplight Circuit of Trailer to FunctionDoes your trailer have separate brake lights from turn signals? If so, the part # PK12-724 will not work without also installing a taillight converter on your trailer like # 118158 so that you can then run the red wire of the converter box to the stoplights of the trailer. The 7-way configuration of the # PK12-724 only allow stoplights and turn signals to be carried on the same circuit.
view full answer... - Availability of Adapter to Go From 7-Way Round to 7-Way Blade ConnectorWe do have the Pollak Trailer Connector Adapter # PK12-724 which is designed to plug into a 7-way round and give you a 7-way blade connector. This would work well for you.
view full answer... - Difference Between 7-Way Round and 7-Way Blade ConnectorsThere is a difference between a 7-way round and and 7-way rv blade connector. If you take a look at the accompanying photo, which is from our linked article on trailer wiring you can see that the connector on the left has blade-style pins while the one on the right has round pins. There is even an adapter, the Pollak Trailer Connector Adapter # PK12-724, which is a 7-pole round to 7-way blade if you need to go from the uncommon 7-way round to more common 7-blade. I have linked each of...
view full answer...
- 7-Way Round Commercial Vehicle End Connector To 7-Way Blade Trailer ConnectionIf you are looking for a temporary solution the Pollak Trailer Connector Adapter # PK12-724 is the simplest solution. You can plug it into your International dump truck and have the 7-way blade connector available. If you are looking to add a more permanent 7-way blade onto your International the Tow Ready 5th Wheel/Gooseneck Pigtail Wiring Harness # 20024 includes 6 wire taps and a grounding eyelet to allow you to wire in a 2nd connector. The harness is 4' long to allow you to mount...
view full answer...
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