Don't Miss These Holiday Savings!
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.
California residents: click here
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today, we're going to be taking a look at part number 47405. This is the Hopkins adapter, 7 pole round pins to a 4 pole flat connector. This adapter is going to convert your 7 pole round plug with round pins on your vehicle to a 4 pole flat trailer connector on your trailer. We take a look at the overall link measuring from the back to the front. Just going to give some measurement, about 4 and one eighth of an inch. It's made from a nice, durable plastic construction so it's very strong and durable.
It's also going to feature a nice impact and corrosion resistant design. Over here on this end by the finger tabs, you're going to have the 4 pole connection, that's going to come with the dust cap, so this is included to protect the 4 way connections when the plug's not being used. Simply just slides over there. You're going to have the large finger grips that's going to allow for easier installation and removal of the plug. It's also going to feature the tab here on top, that's called a lineup of the groove on your 7 pole plug for easy connectivity. Really nice design, and again, this plugs in to the 7 pole round plug on your vehicle, and then it's going to allow you to have the functions needed to power the trailer lights on your trailer that has a 4 way flat connector on it.
That's going to do it for our review of part number 47405. This is the Hopkins adapter, 7 pole round pins to a 4 pole flat. .
Average Customer Rating: 4.6 out of 5 stars (25 Customer Reviews)
My fault, wrong piece! Didnt know that there were different prongs! I need the 7 flat prongs with a 4 flat connection! Installed the wishbone wiring today, very pleased with that! Ran it all and connected to my new lights, been a long time coming, thank you so much
I bought a truck wired with a 7 pin trailer receptacle so I went to 2 different stores locally to purchase an adapter. Striking out twice, I checked etrailer.com and sure enough it was available. I made the purchase, arrived in a couple days and made a perfect fit.
The Adapter DOES NOT WORK on the running lights! It does work on brake and turning lights. I tested the pickup Receiver for the Adapter and the pickup works ok, however looking at the "Adapter hole side, with the guide up" the Adapter tail lights connector is the 2nd hole to the left But on the pick is the 1st hole on the left on the 1996 Dodge Ram 2500. (factory equipped). How do I contact you all on this?
Item arrived in great condition DAYS BEFORE it was expected. Great company to do business with. Any trailer needs I have going forwarded will be handled through etrailer.com!! Best company I've EVER done business with.
I was having a hard time finding this trailer adapter and found it on etrailer.com! Exactly the right pin to pin configuration. The economy shipping was fast too. I received the adapter in a timely manner. Thank you
I use this to adapt my tractor's power outlet to run a 12 volt sprayer. I just use the ground and light terminals. That way, when I turn on the Tractor's lights on the sprayer runs. Works great!
Dose what it's made for. Use it all the time :)
This is a nicely manufactured and finished product, and comes with a cover for the 4-pin end of the plug. It is easy to use.
Worked perfect for our 1993 Ford F-250 diesel. This is a 7 round to 4 flat accessory
The adapter worked well, and I use it regularly. A good buy for the price.
Excellent ease of use, Exact product and quick FREE delivery.
Good plug came quick and pic is great
Good product, good people
Great product and price
As advertised and works well
good price.
Do you have a question about this Trailer Wiring?
Info for this part was:
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.
Katrina B.
4/20/2022
It sounds like there might be a connection issue between the 4-pole to the adapter. We suggest that you test the 4-pole side of the adapter with the 7-pole connected to the vehicle. I have sent this information over to our customer service department for them to better assist you.