Adapter 7 Pole to 4 Pole with Tester and Cover
(552 reviews)
Price: $12.69
In Stock
Adapter 7 Pole to 4 Pole with Tester and Cover
Item # 47345
Retail:$16.54
Our Price: $12.69
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- All Info
- Reviews (552)
- Q & A (0)
- Videos (2)
- Photos
Hopkins Trailer Wiring - 47345
- Wiring Adapters
- Single-Function Adapter
- 4 Flat
- Plug Only
- 7 Round - Blade
- Hopkins
| If your truck has the connector on the left, and your trailer has the connector on the right, you will want this adapter. | |
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| Vehicle End | Trailer End |
Similar to 18142 and 30702
47345 Adapter 7 Pole to 4 Pole with Tester and Cover
California residents: click here
Video of Adapter 7 Pole to 4 Pole with Tester and Cover
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover Review
Randy: Hey guys. It's Randy here at etrailer.com. We get questions all the time from customers asking us how they can get their 7-pole to work with different style connectors. What we're going to look at today is from Hopkins, and this is a 7-pole to 4-pole adapter. This is going to plug right into our 7-pole. It's going to give us the functions we need for a regular 4-pole plug.
Basically what that means is that we can run a 4-pole trailer connector just like this through our 7-pole plug by using this adapter.This is going to eliminate the need for us to modify our vehicle's wiring, add a separate 4-pole onto it. And it's also going to reduce the need for us to replace the plug on our trailer and switch it over to a 7-pole round or something like that. They plug in really nice and easy. There's a couple things that make this one a little bit different than what we're used to out of these adapter. One's going to be the lights that we see here.
This is going to give us signals and indicate to us that our running lights are working. Our left turn and brake are working, and our right turn and brake are working. If we hook up to our trailer, plug it into our truck, and the lights on our trailer aren't working, as long as these lights are working, we know it's not our truck. It eliminates 50% of the possible problem. And we can do the work on our trailer that we need to.Something else that I like that we don't always see on the adapters, some of them have them, some of them don't, but that's going to be a cover.
It's going to go over and protect our connection. Now you could leave this installed on the back of your truck if you don't use your 7-pole. And I recommend taking it out and throwing it in the glove box, something like that. We always recommend using dielectric grease, but if you're going to leave it installed, I highly recommend it.Basically we're going to put that on both sides of our plug. It's going to prevent moisture from getting in.
If we can prevent moisture, we prevent dirt from being built up in there. And if we don't have moisture, we don't have dirt, we're not going to have corrosion. Corrosion on our prongs on both sides can lead to a lot of lighting failures on our trailer. Using a little bit of grease, keeping it on there, it's going to prevent most of that.Now as far as installation, just going to lift up our cover, then we're going to slide in our plug just like that. At that point, we're going to take our 4-pole, plug it in like that. We're going to be ready to head down the road. As you can see, that's a really quick and easy solution to a common problem. Now to show you how the indicator lights or the LED lights on there are going to work, we'll turn on our headlights. You'll see the light come on. We've got our left turn signal, our right turn signal. And then they'll both come on for our brakes.Now I really like this adapter. It's more compact than some of the other ones I see. And I also like that it has the cover and it has the lights. If I was looking for a 4-pole only option, I'd definitely choose that one. If you wanted to upgrade that slightly and have some more adaptability available, I might go with 78118. That's going to be a 7-pole to a 5-pole adapter. That fifth pole can be important if you want to run reverse lights on your trailer. So when you hit reverse in your truck, the lights come on in the trailer. You can see where you're going. Or in a marine application, not really like this, but some of them have a surge coupler here on the front. That surge coupler as it squeezes applies brakes on the trailer. So in that application if you back up without an electric lockout or a manual lockout, the trailer won't go. The brakes will be applied.You can also use that fifth pole for your electric lockout, so when you hit reverse, your trailer will back up. Outside of that, I think this would be an excellent decision. As far as how it's made, how it fits together in the fit and finish, Hopkins has done a really good job on all the seams. There's no gaps. There's no cracks. Really no over mold on the plastic. You can tell they've really taken their time to make a very good product.
Customer Satisfaction Score:
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Customer Reviews
Adapter 7 Pole to 4 Pole with Tester and Cover - 47345
Average Customer Rating: 4.8 out of 5 stars (551 Customer Reviews)
by: Randall 03/29/2024
ETrailer had exactly what I wanted at a fair price. Website was easy to navigate and purchasing was simple. Shipping was fast and I was kept notified right up to when I received my order.
by: CrankinSteve02/08/2024
Plugs in easily, shows that pins are producing voltage, and locks in place using the spring loaded door to the 7-pin.
by: Jan12/11/2023
etrailer was great to work with and kept us notified about shipping status. The trailer arrived when promised, went together easily. looks great and we look forward to using it this spring to haul our two kayaks.
by: Scott B11/06/2021
Great hitch, perfect fit and quick install on my '17 Nissan Frontier S King Cab.
The Factory Tow package light install is outstanding for a plane-Jane truck like mine. Easy install. My only complaint is that it doesn't come with a mount bracket. I picked one up local, but decided to mount the connector in the steP-bumper for more protection.2" hole saw is perfect, and #10 stainless screws with washers and lock nuts.
Adapter with the test lights is perfect for making sure everything is working.
Great set up, about 1 hour total install time start to finish.
by: Gordon S02/18/2017
I found this to be the best model due to the l.e.d indicator lights. The other options were the red or blue glowing adapters or none at all. It works perfect and appears to be very well made. Converts a 7 pin plug (1 center 6 in a circle) to a 4 pin plug (three female one male).
Thank you again etrailer for having such a large selection of products and excellent customer service!
by: Alex 04/26/2024
Works great.
by: Jessie05/30/2019
Worked great, matched up with the trailer light receptacle on my Kia Borrego like a charm. Very pleased.
by: Gary 03/24/2024
Good price
by: Alan 03/10/2024
Arrived on time and in good condition. Item looks good, have not used it yet.
by: Sandy 02/07/2024
It is versatile, compact, and affordable. Good Job.
by: N08/14/2023
Well priced, fast shipping, great customer service and adapter works well. Easy transaction. Would highly recommend shopping with etrailer.
by: Jessie05/23/2014
Quick and inexpensive way to convert a 7 pole to a 4 pole. The built in tester is an added bonus to ensure your wiring is correct.
by: Jimmy 01/23/2024
Good adapter
by: Rusty 04/14/2023
Glad I purchased this adapter with the tester. It really helps knowing ahead of time that you have power before plugging into your trailer. Highly recommended
by: Mark02/16/2024
Good adapter would buy again
by: Bill T.09/29/2019
I used this wiring kit with the Honda hitch. I would recommend installing the 7-way receptacle to the mounting bracket on the hitch prior to installing the hitch to the car. You will need to drill holes in the mounting bracket on the hitch since the ones on the receptacle don't line-up with the ones on the bracket. I used four stainless steel screws and nuts with nylon inserts to connect everything together. The rest of the installation went just like the video, easy.
by: Texmarke03/13/2022
This was just what I needed for my new used pickup to hook up my trailer.
by: Philip 12/01/2023
Thank you for the fast shipping and quality products. Worked Perfectly.
by: Deborah02/11/2021
The review was two stars, and the comments were that the LED lights do not work with my vehicle as the device is apparently not compatible with a 2017 Mercedes GLS. I believe before the vehicle will energize the turn signal, brake, or flasher circuits, the Mercedes needs to sense more resistance as would come from incandescent trailer light bulbs . Recommend that the manufacturer put in resistance in parallel with the LEDs to simulate the load of incandescent bulbs.
Heather A.
2/23/2021
Thank you for your review. This particular adapter does have a hard time sensing the load of LED lights because they draw such little power. I recommend 7-Way to 5-Way4-Way Trailer Adapter for Vehicles with Lamp-Out Sensors part C35FR which is designed specifically for Audi, Mercedes-Benz, Porshe, and Volkswagen vehicles with the factory tow package.
by: Drew10/14/2018
The adaptor fit well and seemed to work well until the right trailer turn signal didn't work. I replaced the bulb and still didn't work (would not indicate). The lights would turn on and indicate when braking but the right turn signal would not work and the left one flashed both lights like hazards. When I put on my wife's car (doesn't need the adaptor) it worked fine so the only thing that could be the problem is the adaptor or my car.
Mike L.
10/15/2018
You made a great start in the troubleshooting process by trying the trailer with another vehicle. Now, you will need to determine if the problem is with the wiring on the vehicle or with the adapter. You will need an incandescent circuit tester like the # PTW2993 we offer. Plug the adapter into the 7-way on the vehicle. Use the tester on each pin of the adapter as the indicator and brake lamp functions are activated. If everything tests okay at this point, you might have a slight ground problem on your trailer. Some vehicles are more sensitive about ground problems that others, so its entirely possible that a slight ground problem on the trailer would cause problems on your vehicle, but not when you tried it on another. If you do not get the correct signals on the adapter, unplug the adapter and test the 7-way on your vehicle. If the connector on the vehicle works okay, then the adapter is bad and should be replaced. If the 7-way is not working correctly, check the vehicle fuses that protect the towing circuits. The location of these should be shown in the owners manual. I will link you to an article that explains more strategies on troubleshooting trailer wiring.
Helpful Links
by: Jennifer 04/22/2023
Received the adapter today. Plugged it in to check function. Works well. Very Pleased with purchase. Thank you.
by: Karen02/24/2019
These wiring components work perfectly. They were easy to install with the instructions. Anybody can do this. I got the 7-pole connector in this package and also bought a 7-pole to 4-pole adapter with a test light so I could make sure that the connections were working. I also bought the Polak PK12711Y bracket to put on my trailer hitch. I tried the standard bracket from Walmart but they did not match the hole pattern on the 7-pole connector. Carol C recommended the Polak bracket and the hole pattern matched perfectly. I can now pull my trailer. I will return to etrailer for any of my trailer or other vehicle part needs. Thanks you etrailer.
by: Joseph11/05/2018
This review is prior to full actual use of the product.
The appeal of this product was the small size and lack of any wire harness. The LEDs and dust cover add simple yet useful functionality.
My vehicle has a factory installed 7-pin connector, so I ordered this for when I eventually use my trailer. The test LEDs allowed me to validate the vehicle harness. I recently connected the trailer wiring to make sure the adapter worked, but I've not actually used the trailer yet, so time will tell if vibration or use cause any issues.
So far, the product performs as advertised and I'm happy with the purchase.
by: Rich06/21/2018
There are so many options available - Etrailer detailed description makes it easy finding exactly what you need.
Great product for the price.
Rich
6/21/2019
Quality Product: Working great despite being abused by this nasty weather. Connections holding up well.
by: Larry 09/12/2020
This connector is perfect when you already have just the 7 way on your truck. I HIGHLY RECOMMEND this connector, it's a great way to go if you don't want to install a connector that has both. Buy it you won't be sorry!!!!
Larry W.
9/13/2021
It is a great tester
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See what our Experts say about this Hopkins Trailer Wiring
- Recommended Adapter For 7-Way To 4-Way Flat ConnectorOn your 2004 GMC Sierra, I recommend an adapter like the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover # 47345. This will convert your 7-way vehicle side connector into the 4-way flat for your trailer.
view full answer... - Will The Hopkins Adapter 7 Pole to 4 Pole, # 47345, Fit On My 1996 Chevy TruckThe Hopkins Adapter 7 Pole to 4 Pole, # 47345, will work on your 1996 Chevy Truck as long as you have a 7-Way flat pin (or blades) connector on your truck. This adapter will plug into your 7-Way and give you a 4-Way connector on the back of your truck.
view full answer... - Does Hopkins 7 Way to 4 Way With Tester Require Trailer to Be ConnectedThe tester portion of the Adapter 7 Pole to 4 Pole with Tester # 47345 does not require a trailer to be connected to function.
view full answer... - Would the Hopkins Adapter 7-Way to 4-Way part # 47345 fit on a 2013 Toyota TacomaYes, it sounds like you have a standard 7-way blade trailer connector on your 2013 Toyota Tacoma and the Hopkins Adapter part # 47345 that you referenced would plug right into that and would provide you with a 4-way for a trailer with a 4-way to connect to.
view full answer... - Would Hopkins 7-Way to 4-Way Adapter Work on 2016 Chevy Silverado The Adapter 7 Pole to 4 Pole with Tester and Cover Item # 47345 that you referenced would work perfectly fine in the 7-way of your 2016 Chevy Silverado.
view full answer... - Length of Hopkins 7 Pole to 4 Pole Adapter 47345I went out to the warehouse to measure the 7 Pole to 4 Pole Adapter # 47345 and found it was a total of 3-5/8" long as you can see in the accompanying photo.
view full answer...
- Can Trailer Battery be Charged Using Adapter 7 Pole to 4 Pole with Tester and Cover # 47345Since Adapter 7 Pole to 4 Pole with Tester and Cover Item # 47345 has a 4-Way on the side the trailer plugs into it only has the light functions. All 7- to 4-Way adapters are like this. But what you can do is wire the trailer battery to the running light circuit on the trailer. Then, if you have the headlights on, it will provide a maintenance charge to the battery.
view full answer... - Troubleshooting Trailer Using 6-Way to 7-Way Adapter Where Brakes Are Always Locked UpThis is a fairly common issue when there is a 6-way trailer connector involved. The problem is that there is two ways that a 6-way will get wired and the only difference between the two is that the brake output and 12 volt accessory circuit are swapped. This causes the brakes to lock up whenever the towing setup doesn't use the same wiring setup for both the vehicle and trailer. On the trailer you will want to cut the wires on the center pin and 2:00 pin and run them to the opposite wire...
view full answer...
- Hopkins Adapter 7-Pole To 4-Pole On 2008 Mercedes-Benz GL-Class GL450 Yes, you can use the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover part # 47345 to adapt the 7-way on the 2008 Mercedes-Benz GL450 to a 4-pole connector on the trailer. If this is not what you are trying to accomplish please let me know.
view full answer... - 7 Pole to 4 Pole Adapter For 2018 Nissan Pathfinder If your 2018 Nissan Pathfinder has a 7-way round connector, the Adapter 7 Pole to 4 Pole with Tester and Cover # 47345 will enable you to plug your trailer connector to the vehicle end.
view full answer... - LED Indicator Stays On All the Time When Trailer is Plugged Into 7 to 4-Way Adapter 47345If the LED light is staying on that indicates that power is being drawn through the system. This indicates a short on the trailer wiring. To track down the short there are a couple of things you can do. First, make sure the trailer side connector is clean and free of corrosion. Then make sure its main ground is attached to a clean and corrosion free bare metal surface. You will also do the same with all of the trailer lights. Then check the actual wires. Any nicks in the wiring or frayed...
view full answer... - What Do Each of the Lights on Adapter 7 Pole to 4 Pole with Tester and Cover # 47345 IndicateThe test lights on the 7 to 4-Way Adapter # 47345 will illuminate when there is a signal showing that the circuits are working (on the vehicle side). The bottom one will light up when the running lights are working. The center light will illuminate when the left turn signal and brake lights are working. And the top light will illuminate when the right turn and brake lights are working.
view full answer... - 4-Way on 2005 Ford F-150 4- and 7-Way Connector Not Working But 7-Way IsIf the 7-Way is working on your 2005 Ford F-150 then using adapter # 47345 will work as well. Usually a 7- and 4-Way combination connector uses the same wiring for both the 4- and 7-Way receptacles so it is odd that the 4-Way is not working but the 7-Way is. It could just need to be cleaned or the wiring connections re-established to start functioning again.
view full answer... - Will Adapter 7 Pole to 4 Pole with Tester # 47345 Work with a 2007 GMC YukonAdapter 7 Pole to 4 Pole with Tester # 47345 fits a standard 7-Way trailer connector and that is what would be on your 2007 GMC Yukon. So in other words it will work with your Yukon! I have included a link to a video review of this adapter/tester for you.
view full answer... - Recommended Solution to Adapt Factory 7 Way Blade Harness to 4 Flat Connector on TrailerTo adapt your 7 blade factory connector on your 2016 VW Touareg to your 4 flat trailer plug you'll want to use the Adapter 7 Pole to 4 Pole with Tester and Cover # 47345. This will plug into your factory 7 way and provide you with a 4 flat plug for the trailer. I've linked a review video of this part for you to have a look at.
view full answer... - Purpose of Lights on 7 to 4-Way Trailer Connector Adapter Part # 47345The lights in the adapter will tell you that the vehicle itself is sending the proper signals for the directionals, running lights and brake lights. These lights are useful to eliminate the vehicle as being the cause of any wiring problems. It will not tell you of any trailer wiring issues. If the lights in the adapter indicate that the signals coming out of the vehicle are all operating correctly, but the trailer lights are not working you will have to troubleshoot the trailer. To do...
view full answer... - Troubleshooting Utility Trailer Lights That Dont Work with New Trailer WiringIf you are getting the correct lights with the Hopkins # 47345 tester on your tow vehicle and you have rewired the lights on your trailer then the problem is likely a bad ground just as you noted. Check all of the ground on your trailer and vehicle. Be sure that they are securely connected to a clean, bare-metal surface as even some paint can cause issues. Since the adapter that you use had LED lights for the testing it is possible that the problem is on your vehicle. LED lights use up...
view full answer... - Can Hopkins Adapter be Used to Connect Bargman 7-Way on Truck to 4-Way on Trailer Yes, a 7-Way to 4-Way adapter like the Hopkins # 47345 is exactly what you need to connect the Bargman 7-Way on your truck to the 4-Way flat on the trailer. This will plug right into the truck's 7-Way to provide you with a 4-Way at the other end. No other wiring will be needed. We do not have the particular Hopkins model adapter that you mentioned available but this upgraded version actually features an integrated tester as well so you can quickly see if there are any issues with the...
view full answer... - Can 7-Way to 4-Way Adapter # 47345 be Used with Light Up Hitch CoverYes, the hitch cover you mentioned does use a 4-way to illuminate it so the 7-way to 4-way adapter part # 47345 would be the correct adapter to use.
view full answer... - 4-Way to 7-Way Adapter Recommendation for 2004 Jeep Wrangler Towed by MotorhomeThe 7-way to 4-way adapter part # 47345 that you referenced would be exactly what you need if your tow vehicle has a 7-way socket and the lighting wiring of your Jeep has a 4-way. This will adapt the connector styles like you need and includes a circuit tester.
view full answer... - Second 4-Way Wiring Harness For 2016 Ford F-150To add a second 4 way to your factory system, you only need to add a adapter from your 7 way since you already have a separate 4 way. I recommend using the Adapter 7 Pole to 4 Pole with Tester and Cover, # 47345. I reached out to my contact at Cequent and the T-One # 118384 should fit without issue if you want the second 4 way in line. The only reason why the male end may not connect properly is if there is a bent pin on the male side or something stuck in the female side of that same...
view full answer... - 4-Way Adapter Recommendation for a 2004 Jeep WranglerA square 7-way is not a standard style of trailer connector. It could be possible that you have a round, blade-style 7-way and then all you would need to convert it to a 4-way would be a # 47345. Or you could just install a new 4-way with the part # 118409 and bypass the 7-way all together.
view full answer... - Adapter Recommendation to Go From 7-Way Round to 4-Way FlatYou have a 7-way round connector on your truck so you would instead need the part # 47405 and not the # 47345 that you referenced.
view full answer... - Towing Trailer with 4-Way and Amber Turn Signals with a 2003 Chevy Silverado with 7-WayIf the trailer has a 4-Way flat connector then you can use any 7-Way to 4-Way adapter such as # 47345. But if the trailer has amber turn signals that are on a separate circuit from the brake lights then those turn signals will not light up unless the trailer has a special converter on it, # 118158. the converter takes the combined turn signal and brake lights and separates them out so you have one (yellow) wire for left turn signal only, one (green) wire for right turn signal only, and...
view full answer...
Do you have a question about this Trailer Wiring?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video Edited:
Andrew K
Video Edited:
Jacob T
Updated by:
Laura H
Updated by:
Alexander C
Installed by:
Randy B
Video by:
Zach D
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Texmarke
3/13/2023
If this tells you anything, somebody stole the first one I bought, so I bought another one. This 7-way to 4-way adapter is just what I need.