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Adapter 7-Pole Round Pins To 4-Pole Flat

Adapter 7-Pole Round Pins To 4-Pole Flat

Item # 47405
Retail:$19.11
Our Price: $12.69
You Save: 34%
Trailer Wiring
Shipping Weight: 0.34 lbs
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Hopkins Single-Function Adapter Trailer Wiring - 47405
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Great Prices for the best trailer wiring from Hopkins. Adapter 7-Pole Round Pins To 4-Pole Flat part number 47405 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (28)
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  • Videos (1)
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Hopkins Trailer Wiring - 47405

  • Wiring Adapters
  • Single-Function Adapter
  • 4 Flat
  • Plug Only
  • 7 Round - Round
  • Hopkins


  • Plug-In Simple 7-way to 4-Way adapter
  • Incorporates an easy grip design and includes a dust cover for the 4-flat to help prevent corrosion
  • Impact and corrosion resistant
  • 90-Day warranty

47405 Adapter 7 Pole Round Pins To 4 Pole Flat

Installation Details 47405 Installation instructions


California residents: click here


Video of Adapter 7-Pole Round Pins To 4-Pole Flat

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




Video Transcript for Hopkins Wiring - Wiring Adapters - 47405 Review

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. .

Customer Satisfaction Score:


Customer Reviews

Adapter 7-Pole Round Pins To 4-Pole Flat - 47405

Average Customer Rating:  4.6 out of 5 stars   (28 Customer Reviews)


by: 01/10/2024

This adapter is only for round pins. If the 7-pin connector on your vehicle has flat blades instead of round pins, this adapter will not work.

I'll give it five stars because I expect it works fine, I just didn't realize I needed to check the pins. No fault of the part.



by:

Came quickly, it was exactly the right adapter to hookup our older one to our new foldable Harbor Freight trailer Thank you!



by:

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



by:

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.



by:

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?

Etrailer Expert

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.



by:

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.



by:

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



by:

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.



by:

Dose what it's made for. Use it all the time :)



by:

Worked perfect for our 1993 Ford F-250 diesel. This is a 7 round to 4 flat accessory



by:

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!



by:

The adapter worked well, and I use it regularly. A good buy for the price.



by:

Excellent ease of use, Exact product and quick FREE delivery.



by:

Good plug came quick and pic is great



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Good product, good people



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Great product and price



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As advertised and works well



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good price.



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See what our Experts say about this Hopkins Trailer Wiring

Do you have a question about this Trailer Wiring?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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