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Adapter 4-Pole to 7-Pole and 4-Pole

Adapter 4-Pole to 7-Pole and 4-Pole

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Wiring 37185 - 7 Blade,4 Flat - Hopkins
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Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory. Lowest Prices for the best wiring from Hopkins. Adapter 4-Pole to 7-Pole and 4-Pole part number 37185 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Hopkins Wiring

  • Wiring Adapters
  • Multi-Function Adapter
  • 7 Blade
  • 4 Flat
  • Plug and Lead
  • Hopkins
  • 4 Flat

Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory.


Features:

  • Adapter converts from 4-pole wiring on your vehicle to 7-pole round plug and 4-pole flat wiring for trailer side
  • Adds additional wire leads for brakes, power, and accessory wiring
  • Wire functions:
    • White - ground
    • Blue - brake
    • Black - hot lead - 12 volt power supply
    • Purple - auxiliary
  • Mounting bracket included


Specs:

  • Connector measures 3" x 3"
  • Distance between vehicle mounting holes: 2-3/16"
  • 90-Day limited warranty


product detail

Wire Functions:
White: Ground
Blue: Brake
Black: "Hot" Lead - 12V power supply
Purple: Aux. - Reverse Lights etc.





Note: If you run the hot lead (black wire), you will need a circuit breaker, for example 9510 (sold separately), between the adapter and the battery itself.



47185B Adapter 4-Pole to 7-Pole and 4-Pole - Hopkins # 47185B, TAP # 37185

Item # 37185




California residents: click here



Customer Reviews

Adapter 4-Pole to 7-Pole and 4-Pole - 37185

Average Customer Rating:  4.8 out of 5 stars   (460 Customer Reviews)

Adapter converts from 4 pole wiring on vehicle to 7-pole round plug and 4-pole flat. Additional wire leads for brake, power and accessory.

- 37185
by:

Installed on our 2019 Edge ST with no significant issues. Works as expected, has reasonable required depth behind connector for ease of install, and the bracket was quite adaptable after some bending and cutting. Not impressed with the overall feel, though - plastic seems lightweight and cover hinge pin is already rusting after two winter weeks in western PA. Long term durability tbd.



- 37185
by:

Ordered this 7-pin connector to connect to my pre-installed 4-pin connector (which was also purchased from etrailer last year) and this product has arrived on time, and as promised. Connection is very simple and the product is very light and not bulky, so it makes installation and appearance look professional done! VERY happy with this product and with the fast and friendly services of etrailer.com! Thank You!!


Comments
A year after purchasing the 7-pin connector, it still works as designed! I haven’t had any issues whatsoever and I am quite happy with the product. My main use for the 7-pin connector is to connect my 16’ Bass Buggy Pontoon boat and since day one it has served me right! Extremely pleased with the product and with etrailer.com!!
Stanville - 02/20/2021


- 37185
by:

I bought this so I can convert my dad's trailer to pull I only had a four and I needed a seven so I went and used a four to make it a seven. It's a very nice product it's got nice rubber grommets to keep everything protected.



- 37185
by:

Product came in excellent shape. Instructions were spot on and easy to follow. Our van is still pulling our 2,000lb camper with airbags doing exactly what they are supposed to do. Slight hiccup with lost shipment on the first order but one phone call to e-trailer and another shipment was on the way. Excellent company to deal with and highly recommend.


Comments
The airbags I purchased a year ago are still working excellent. E-Trailer will always be first on my list for any products I may need in the future. One of the few companies you can actually phone and get professional help.
Fred G - 08/01/2020


- 37185
by:

2012 Chevrolet Express..Looks and works great! Easy install..2 1/8" hole saw for center, 3/16" drill bit for mounting screws. Thank you etrailer!



- 37185
by:

Worked as I suspected. Folks at etrailer,com were not informed about how this would work on my particular vehicle, however, I was able to determine what I needed, order it and install it based on the reviews and information provided by customers.



- 37185
by:

This was exactly what I was looking for to add to my 2017 Ford Expedition! It is an easy to install plug-n-play product to convert a factory 4-pin connector to a 4/7-pin connector. I plugged the 4-pin in, connected the brake wire, and grounded it. Ignoring the auxiliary + power cables, everything worked on the first test. The 4-pin connection was given some dielectric and wrapped with electrical tape to keep it sealed from the elements, and the slack was zip tied to secure it. I still need to give it some finishing touches (fill the bracket gap with some black silicone, maybe find the reverse and/or power lines), but it lets me haul my camper!



- 37185
by:

The trailer wiring adapter was perfect and shipped in no time. Looks great on my ford ranger. Im very happy. Was 4 flat only and now I can light my 7 way 18' trailer and have the capacity to add a brake controller (which I will add)



- 37185
by:

The product itself is very well made. The 4-pin connector is molded into the product and very sturdy. The 7-pin connector is held closed by a spring and has a foam gasket to keep water out. The 4-pin wiring is only about a foot long, and the additional 7-pin wiring is a bit longer. I do not have a brake controller (but do borrow a trailer with the 7-pin wiring), so I removed those wires. I also hard-wired all the connections, so I can't speak to the quality of the 4-pin vehicle connector. The mounting bracket is thin steel, which worked well for me, as I had to bend the mounting plate to make it work for my installation. The paint on the mounting plate appears to be high quality as I bent the plate and banged it around quite a bit during install and did not nick the paint. The plate is drilled so that is can be mounted with the 7-pin hinge facing up, down, left or right. The hardware is zinc coated, so it should hold up well to the weather. I went ahead and replaced it with SS to make sure. I also replaced the standard nuts with SS nylon lock nuts to make sure nothing would back out due to vibration. If you plan on using the supplied hardware, I would strongly suggest Loctite on the mounting nuts. I installed this on a CX-5 with hitch # 87623, wiring adapter # C56011 and hitch cover # I-728. Over all a very clean installation. The connector is completely hidden inside the bumper, but easily accessible.



- 37185
by:

2018 wrangler unlimited Sport S. Without trailer wiring. Completed installation today. Used a 4 flat along with a 7 pin converter. Works and fit perfectly. Very hot day and work slowly and carefully. Very satisfied . Great folks at etrailer. Great products, great quality and prices. I'm a several time repeat customer and couldn't be more satisfied. 4 pin harness Was a 56407 and the 7 pin adapter was a 37185.



- 37185
by:

Fantastic service and easy ordering. The part came a day before estimated delivery. My question so informative they actually posted it on the site under the help section.


Comments
Works great, easy install,
James - 12/10/2020


- 37185
by:

They shipped my harness immediately to UPS. After two weeks I did not receive it, so I called the guy said it would be there Friday or Saturday, Saturday was the fourth so I knew that was gonna happen. So I waited till Thursday and called and talked to Amy E., She was great, she Found out that my harness was sent back to them. Amy re-ordered my harness, I received it on Saturday! The harness fit perfectly! So I am going to give them an excellent review! My patients was worth wait ,because it was exactly what I needed! Thank you so much Amy I appreciate all the help.



- 37185
by:

AWESOME hitch unit. Strong, very easy to install (went in like a dream in 30 minutes), heavy duty, and right after I installed it on my 2011 Ford F-150 SuperCab I immediately towed a trailer with a 1971 MGB on it from North Carolina to Connecticut.



- 37185
by:

Great product and description. Installation was very easy and smooth. Everything lined up, the installation video was on point



- 37185
by:

Works well and is pretty simple to install accept for one flaw. The mounting holes for the bracket are so tight against the plastic it is extremely difficult/not possible to get the factory bolts through and mount easily. I had to drill out the holes to make them bigger. Not a major deal, but it's just a poor design in my opinion. Just doesn't need to be that tight. This is the second unit I've purchased because the cover on the first one snapped, so it would no longer hold my plug into the receptacle. Without those two issues, this would definitely get 5 stars. Hoping this second one is the last one I need.



- 37185
by:

Great service. My questions were promptly answered as which wiring kit would fit my 2004 grand Cherokee without having to fabricate wire connectors and such. They gave me several options and explained the differences between them. It made my decision easier . I received my kit sooner than i expected. I haven't installed them yet, because I still have to put the hitch on, but I am sure it will be basically a plug and play deal. I would recommend etrailer to everyone just in the service alone. Thanks guys.


Comments
Works excellent. Easy install and no problems doing it.
Peter - 09/13/2019



- 37185
by:

I DO A LOT OF AFTERMARKET PART ORDERING ONLINE. IT IS ALWAYS NICE TO GET ON A SITE AND BE ABLE TO EASILY FIND WHAT YOU ARE LOOKING FOR, ESPECIALLY WHEN YOU DO NOT HAVE A PART NUMBER JUST A PICTURE AND IN SOME CASES THERE IS NOT MUCH OF THE PIECE LEFT SO IT MAKES ORDERING REPLACMENT PIECES DIFFICULT. MY TIME WAS WELL SPENT AND EASILY FOUND AND CHECK OUT WAS A BREEZE FOR A FIRST TIME SHOPPER ON YOUR SITE. THANK YOU TRACY WITH CALIBER COLLISION CSPG #816



- 37185
by:

Just what I need to tow an RV trailer. Also has a four flat connector. Very easy to install on the 18136 bracket.



- 37185
by:

Installed on a 2010 Ridgeline. Just what I needed at a great price. Install was a breeze. etrailer is the best place to find all the stuff that auto dealers rip you for. Good quality and the customer service is above reproach.



- 37185
by:

Product was as described, and easy to assemble. I had to adapt from a 4-pin plug to a 7-pin for my new camper. It resolved the issue of changing an entire wiring harness. There are very limited instructions on hooking additional wires for 12 volt, back-up lights, brake controller, etc. [Online there are] many videos to help with additional steps.



- 37185
by:

I installed this connector over a year ago on my truck and am very pleased with its performance It is good quality piece of equipment that I do not expect to need to replace or repair.



- 37185
by:

I had to alter the mounting bracket, but it works great.



- 37185
by:

Hitch arrived in a timely fashion. Installation was a breeze and the fit and finish were perfect. Wiring harness hooked up perfectly. etrailer made the whole process simple. I just ordered another hitch and harness for our new car.



- 37185
by:

Very pleased with the Curt hitch that I purchased. I normally buy from Rockauto but I found Etrailer to be cheaper and the information that they provide on their website is fantastic. I searched on youtube for information on the wiring for my K2500 and was pleasantly surprised to find exactly what I needed on etrailer.com. Very helpful website for anyone purchasing a hitch or wiring setup for their vehicle.



- 37185
by:

Nice quality adapter harness. I would highly recommend etrailer.com


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