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7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End

7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End

Item # HM40975-11998
Our Price: $86.59
Custom Fit Vehicle Wiring

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Tow a trailer with either a 7-way or 4-way plug with this dual vehicle-end connector. Included pigtail harness hardwires into your vehicle and the connector end mates with the 7-pole socket to form a weathertight seal. 1-800-940-8924 to order Hopkins custom fit vehicle wiring part number HM40975-11998 or order online at Free expert support on all Hopkins products. Great prices and Fastest Shipping for 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End. Custom Fit Vehicle Wiring reviews from real customers.
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Hopkins Custom Fit Vehicle Wiring - HM40975-11998

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 7 Round - Blade
  • No Converter
  • Hopkins

Tow a trailer with either a 7-way or 4-way plug with this dual vehicle-end connector. Included pigtail harness hardwires into your vehicle and the connector end mates with the 7-pole socket to form a weathertight seal.


  • Dual connector lets you hook up to a trailer with either a 7-pole, RV-style plug or a 4-way flat plug
  • Pigtail harness hardwires into your vehicle and connects to 7-way socket
    • Includes color-coded 7-wire leads and 1/2" convoluted tubing
    • Forms weathertight seal on back of socket to keep out moisture and prevent corrosion
  • Rubber gasket provides excellent weather protection
  • Integrated stainless steel spring lets you easily open and close socket covers
  • High-impact ABS plastic construction is extra durable
  • Sturdy steel mounting bracket installs on bumper with included screws
    • Black epoxy coating resists rust


  • Bracket dimensions: 4-3/4" long x 3-1/16" tall x 1-3/4" deep
  • Distance between mounting holes (center to center): 2-3/8"
  • 1-Year warranty

Dimensions of bracket

Wiring Configuration

Wire ColorCircuitWire Gauge
RedLeft turn and stop14 Gauge
WhiteGround10 Gauge
BlueElectric brakes12 Gauge
GreenRight turn and stop14 Gauge
BlackBattery12 Gauge
BrownRunning lights14 Gauge
YellowReverse lights14 Gauge

40975 Hopkins 7- and 4-Way Trailer Connector Socket with Mounting Bracket - Vehicle End

11998 Pollak Pigtail Wiring Harness for 7-Way RV Socket

Installation Details HM40975-11998 Installation instructionsAlternate Instructions HM40975-11998 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End - HM40975-11998

Average Customer Rating:  4.8 out of 5 stars   (519 Customer Reviews)

Tow a trailer with either a 7-way or 4-way plug with this dual vehicle-end connector. Included pigtail harness hardwires into your vehicle and the connector end mates with the 7-pole socket to form a weathertight seal.


Quality is good, but wire colors aren’t standard and there were no instructions in the package for how to wire. I had to google standard pin outs and colors. Pigtail is too short, by about 2 feet and I had to splice twice to make it reach the inside of my vehicle (GMC SAVANA). Once I did all that it worked perfectly but what should have been a 1 hour job turned into an all day project. Do not recommend. Go to your nearest RV store.

Etrailer Expert

Jenny N.


For Hopkins wiring they follow the following wiring scheme: Red = Left turn and stop White = Ground Blue = Electric brakes Green = Right turn and stop Black = Battery Brown = Running lights Yellow = Reverse lights. If you need to add additional wire we do carry jacketed 7 wire by the foot as part # DW04914-1.

Chevrolet Colorado

The service provided by George and Lacey was the best part of this transaction. Lacey helped me find the right parts and sent me a video about installation. They both worked to correct my order and customized the delivery date.

The parts were precisely what I needed to get power to the bumper for a small trailer and bike rack. A few comments: order more butt connectors as the mfr sent 6 and there were seven wires on my Colorado. When connecting the tail harness to the truck harness, be sure all the wires on each side are the same length. The yellow wire strippers take some getting used to, so practice on several wires first. I’m an ‘average’ handy person so these last two suggestions didn’t come naturally to me, but overall this was a pretty simple installation. When I tested it and all the lights worked, I was a happy camper.


Installed the "7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End". Simple and easy to follow instructions and video.

2008 Ford F-150

Mounted perfectly to existing bracket on 2008 F150 Lariat with factory towing package, cut off connector from wiring harness and heat shrunk wires together to existing harness




2016 Chevrolet Colorado

Easy installation! Kit only supplied 6 connectors when there were 7 wires ...... oops!

Etrailer Expert

Laura E.


Steve, the 6 connectors are correct. The ring connector that attaches to the ground wire is the 7th connector.

Steve B.


I still like the wiring harness I purchased from your company last year. Thank you for asking.

2012 Dodge Ram Pickup

This is a fantastic quality part and an excellent alternative to Ford's OE connector (the difference being this one is far less expensive and does not have the Ford emblem. I used the connector to replace the 7-Pin/4-Pin combination plug on my 2002 Ford Super Duty after swapping the bed/bumper/tailgate from a 2012 Super Duty. It is a vastly superior connector in that the 4-Pin is integrally wired with the 7-Pin as opposed to having the 4-Pin spliced into the harness. I would definitely recommend this part for any towing rig. I eve put one on my father's 1995 Dodge Ram 2500. Don't hesitate to order this one!

2022 Chevrolet Colorado

This item came relatively quickly (with a slight delay due to a backorder, but E-Trailer communicated this very well). The directions, the fit and the on-live install video is very helpful. Please watch the video to be sure you are getting the wires crossed correctly - the wire colors from the harness and the factory wires do not all match so be careful there. Highly recommend this product.

2017 Hyundai Santa Fe

I have a 2017 SantaFe I have 2 different trailers and need both types of plugs I am using this product along with a curt class III hitch and a curt 56332 wiring harness.
I want the finished outlet to be behind the factory cover I had to modify the Hopkins bracket by bending it in the opposite direction on a angle because the hitch is in the way .a little effort and its great

1992 Ford F-150

The trailer plug went bad on my 92 F150 several years ago. This plug is the same as my 10 F350. I like the combination 7 spade/4 pin. Other combos have a rubber flap to cover the 4 pin plug. I doubt I’m that disciplined and I would think that rubber cover would dry rot and break off. This plug has spring closure doors and looks great!

2018 Chevrolet Colorado

The new shoulder connector will fit perfectly. I watched installation videos on you tube and the product I received worked just like the video.


This is the same look as a factory install. I was greatly pleased with the overall installation. Super easy to wire up and looks great in the bumper. My truck has the clean factory look for way less than what they had quoted for an install.

Etrailer Expert

Mike L.


Installation installation and wire color coding information is provided and linked above in the product description.


This, combined with Item #e45ZR and Item #C68JR, worked great to add both a 4 way and a 7 way harness to my 2021 Kia Telluride. I only used the harness from the Item #C68JR kit, not the socket. I replaced the socket with this item.

Ford F-350 Super Duty

This is a great affordable option to replace your worn out or damaged OEM trailer recepticle. The fit is perfect. It is made by Pollak which is the same as the Ford one you replace. I damaged mine and took the pin connectors out of new housing and installed it on my F350 without splicing wires. Worked perfectly.

2018 Chrysler Pacifica

Bought this trailer connector to use instead of the flat 4 wire connector. Wanted a nice finished look on the rear of the vehicle without any hanging wires. Mounts to the Draw Tite mounting bracket without any modification. Only minor problem I had was with the wiring. The wire colors are not the same between the 4 and 7 pole connector. A call to etrailer got the problem resolved. Great customer service!

2016 GMC Canyon

Great product!
Fits the factory hole
in the bumper perfectly.

Attaching the wires was a pain but that was due to GM saving $1 by just cutting the wire ends and not installing a plug......but they were all there so that was a plus.
If you do install this setup AND you install a hitch, leave the spare tire down while you attach the wires. There's plenty of wire with the plug but the factory wires are up kinda close to the underside of the bed so not a lotta room.

ALSO spend the extra couple dollars and get the heat shrink butt connectors, they're available here in whatever size you need.

Another thing to think about, if you plan on eventually installing bed/ cargo lights any time soon, now is the time to add that extra power wire before you crimp, shrink, and tape the hot wire......


Nice upgrade in place of 4-wire-only. Looks good, works good.


I’m glad I chose this over a single plug! No matter what you have on the hitch, you’ll have the plug for it. The pigtail is plenty long enough and the bracket makes for a simple installation. Get some shrink tube or shrink wrap butt connectors as the ones included aren’t going to keep weather out for long.


Perfect connector for what I was looking for on my 2019 RAV4. I originally installed it with the L bracket, but later changed it to be flush in the bumper. Looks very clean. The prefab pigtail made install into the car very easy as well.

2006 GMC Sierra

Only gripe, the plug wiring on the back is at a 45° and the plug in on the front is at a 90°, so dont wire up the wires by the wiring plug but how the plug in on the front would plug in, I made the mistake, but other than that, works great, looks great, fixes botched wiring like my truck had with just twisted together and taped up wires, easy install

2019 Chevrolet Colorado

Good product instructions easy to follow, the final product looks great.


Good deal perfect fit

2001 Toyota Tacoma

Bracket is most likely 14 gauge (measured it) and should be easy to weld. Connector appears to be of reasonable quality, but time will tell if it holds up or not. No matter, welding the bracket to my rollpan will be the difficult part, not replacing the connector housing, should it fail. Hard to rate something I haven't used, so first impressions, I guess it's a five star.


easily connected. liked direct wire system. however lights worked at first, now all are out but brake lights. I think this may be due to the connectors used. havent had time to trouble shoot it yet.

1996 Ford F-250 Super Duty

When I purchase this wiring and plug kit they said it was for a Chevrolet pickup. I used it on my 1996 Ford f250 only difference is color of wires. easy to figure out. works great and good quality product


Fit like a glove where the plug was in the bumper. Easy to convert the four pin flat to the 7 pin using etrailer parts and instructions.

Show More Reviews

See what our Experts say about this Hopkins Custom Fit Vehicle Wiring

  • Availability of a 7-Way to Hardwire to a 2014 Ford F-53 Chassis
    On the Ford F-53 chassis there is a 6 pin connector that has the trailer wiring circuits. I attached a picture that shows what it looks like. Unfortunately, unless you can locate the OEM 7-way that would have the 6 pin plug on the other end, you'll need to do some splicing. If the connector you found is active, to splice in a 7-way I'd recommend the Hopkins # HM40975-11998. The pigtail included with the connector uses a different wire color code that usual, see the bottom of the product...
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  • What Hitch and Wiring do you Recommend for Towing 5,000 Lbs with my 2021 Chevrolet Colorado
    We have exactly what you will need. The etrailer Trailer Hitch Receiver part # e98909 offers the 2" reciever and can handle up to 8,000 lbs. when towing giving you a little wiggle room. For wiring the Hopkins 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring part # HM40975-11998 is the way to go. Not only does it have the 7-way but also a 4-way for different trailers eliminating the need for any type of adapters. I have linked installation videos on each of these...
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  • Parts Needed to Make 7-way Euro to 4-Way Adapter
    I do have an option for you but they do not offer an adapter to go directly from a US 4-Way to a Euro 7-Way. However, you can make one of your own using only the part # 118158, part # 16-4B-1 (per foot), and part # HM48192. I have then attached a wiring diagram on this process for you. You'll have to source the correct trailer connector style local to you as we don't have a Euro style 7-way.
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  • Does a 7-Way Need to be Installed on a Second Trailer When Double Towing
    Technically you don't "have" to have a 7-Way, but if you will be towing your utility trailer with your tow vehicle only sometimes then a 7-Way is the best way to go. Using the Epicord 7-Way Molded Trailer Plug with Junction Box # 277-000141 is an option to do this. The junction box is labeled on the inside which makes your wiring much easier. If you are only wanting to add the braking function then you will need a minimum of 10 Gauge Wire # 10-1-1 to run from the junction box to your...
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  • Replacement 7-Way Wiring Harness for a 2007 Toyota Tacoma TRD
    When you say part of the trailer connector was broken off, do you still have the plug that attaches to the back of the trailer connector? This removable plug is called a US car connector and can be seen in the attached photo. If you have this plug still then you can use the Reese Multi-Plug Wiring Harness part # 74682 but if you do not then you will need to use the 7-Pole and 4-Pole Trailer Connector Sockets part # HM40975-11998. In order to mount either of the trailer connectors to the...
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  • Availability of 2-Foot Long Trailer Wiring Harness for Motorhome
    I can come up with a solution or two for you, but the cable on the Curt # C55774 that you looked at measures about a foot long, so unless you have some slack in the motorhome's tow package harness that would make up that extra foot for you, you would need to make some modifications to an existing product. The first alternative would be to use the # HM40975-11998, and cut off the US car connector on the motorhome and hardwire the pigtail from this connector into the tow package wiring....
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  • Do All 7 Wires Need to be Connected for Hopkins Wiring Kit on 2003 Chevy Silverado
    You are correct, if you are missing one of the functions on your 2003 Chevy Silverado you don't necessarily need to use it. If it is the brake controller circuit then you simply need to cap off the blue wire for the Hopkins # HM40975-11998 that you are looking at. I do recommend using a circuit tester like part # PTW2979 to ensure it is the brake controller circuit that you don't currently have on your pickup. I have attached a diagram showing the wiring configuration for the Hopkins wiring...
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  • Wiring Harness and Connector Recommendations to Fit LED Tailgate Lights on a 2013 Nissan Frontier
    I have a couple of solutions so you can use your LED light strips on your tailgate of your 2013 Nissan Frontier however, the Curt T Connector # C55362 that you referenced is not a fit for your vehicle. If your truck has a factory 7-way connector and your LED strip has a 4-flat connector, I recommend the Hopkins # 30955. The connector will allow you to keep your 7-way and add the 4-flat so you can connect your LED strip without splicing. If your LED light strip has a 4-pole connector and...
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  • Replacement 7-Way and Harness for 2018 Mercedes Benz Metris
    To replace the 7-way of your 2018 Mercedes Metris we have the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 which would work really well. This is a 7-way with the harness you are lookin for and on the cover of the connector is a wiring diagram that you can use. Wire Color Circuit Red Left turn and stop White Ground Blue Electric brakes Green Right turn and stop Black Battery Brown ...
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  • 7-Way Solution to Install Curt 4-Way C55384 on Vehicle with Wired 7-Way
    If you replaced the wired 7-way of your 2019 Nissan Frontier with the 7-way/4-way kit part # HM40975-11998 you'd be able to install the # C55384 inline with the connector.
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  • Brake Controller Recommendation and Installation Tips for a 2011 GMC Terrain
    Since your 2011 GMC Terrain already has a 4-Way trailer connector, you will just need to use a 4- and 7-Way Installation Kit, # ETBC7. This will provide the 7-Way connector, mounting hardware, and the wiring and circuit breakers needed to install a brake controller. I have included links to an FAQ and a video that will help you with the installation. The only other part you may need is a circuit tester, # 4PTW2993, unless you already have one. For a brake controller, I recommend the...
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  • 7-Way/4-Way Kit that Fits 2021 Chevy Silverado 1500
    Yes the 7-way/4-way kit part # HM40975-11998 does fit your 2021 Chevy Silverado but since your truck already has the round connector that comes with this kit you'd only really need the part # HM40975.
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  • Trailer Wiring Harness that will work for 2016 GMC Savana Van with 6-way connector
    If you have a 6-way on your vehicle, there are two routes you can go. You can add a 6-way plug to your trailer or you can switch out the 6-way to a 4-way or 7-way. I would recommend switching out the 6-way on your vehicle to a 4 and 7-way combo such as # HM40975-11998, so that you have the option to haul trailers with different wiring set ups without having to carry an adapter. I say this because 6-way plugs are not very common. If it is a US car connector that you have installed that...
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  • Which Taillight Converter for 2001 Chevy Silverado 1500
    This Hopkins Tail Light Converter Kit with 4-Way Flat Connector - LED Compatible, part # HM48895, is intended specifically for vehicles with LED taillights. This unit converts the tow vehicle 3-wire separate tail light system to the trailer 2-wire combined system. Since this unit is intended for use with LEDs, which draw much less power than incandescent type lights, it will not be compatible with vehicles that use incandescent bulbs in the lighting system. A converter module intended for...
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  • Why Wouldn't Trailer Interior Lights Be Functioning When Connected to Chevy Truck
    Sounds like the 12 volt accessory circuit on your 2003 Chevy Silverado 2500 7-way isn't activated as that is the circuit that usually powers interior lights on a trailer. You can test this by testing the circuit in the 2:00 position of your 7:00 for voltage. If none is there then the problem is the circuit not being activated. Since this circuit isn't always activated on Chevy trucks I am fairly confident you just need to complete the circuit under the hood of your truck. I attached a...
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  • Replacement 7-Way Trailer Connector for 2001 Ford Excursion
    I'm not entirely sure what you're needing. The # 74682 is listed as a fit for your Excursion. It is designed to plug into the round US car connector that plugs into the back of the OEM 7-way. Further back on the wiring harness is a rectangular connector that resembles that shown on the # 118243. We don't offer that portion of the harness, if that's what you're needing, you'd probably need to obtain that from your Ford dealer. Another option would be the # HM40975-11998. You could cut...
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  • What do I Need to Install Tekonsha Prodigy P3 in my 2013 Chevy Suburban
    Your 2013 Chevrolet Suburban should already have the OEM wiring under the dash on the driver's side. You just need to pull the wires down and hook them up to the brake controller using the Pigtail Wiring Harness # 7894. If you are wanting to mount your brake controller in your suburban, I recommend using the Replacement Mounting Bracket # TK5906. If your Suburban has the factory tow package already installed then you will not need anything else. If you do not have a 7-Way at the rear,...
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  • Wiring to Brakes on Trailer Being Double Towed
    To get brakes to your second trailer you will want to use 7-Way Molded Trailer Plug with Junction Box # 277-000141 on your second trailer, using 10 Gauge Wire # 10-1-1 to run from the junction box to your brakes. On the rear of your fifth wheel you are going to want to use 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 as a way to connect the two trailers. Also, keep in mind brake controllers recognize the number of axles braked so you will need...
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  • How To Wire a Semi to Tow an RV
    The brake and turn signal circuits are combined in standard trailer wiring applications therefore, I think there might be an issue with how the tow vehicle is wired. If the tow vehicle uses separate brake and turn signal circuits then you will need to combine them with the Roadmaster Brite-Lite Wiring Converter part # RM-732 which can then be wired to the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket part # HM40975-11998. If you can't access the stop light circuit on your...
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  • Connecting Electric Trailer Brake Wire on 2002 Chevrolet Silverado 1500
    In the tow package wire bundle located near the spare tire on your 2002 Chevrolet Silverado, there should be a darker blue wire to which you can connect the blue wire from your wire harness, # HM40975-11998, with a butt connector, # 05732-2. If there is not a dark blue wire with your tow package wires, you will want to run a wire, # 10-1-1, from your wiring harness to your brake controller, # HM47294. Once inside the cab, you will need to cut the blue wire on your brake controller adapter...
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  • Replacement Trailer Connector and Wiring Harness for 7-Way on 2010 Ford F-150
    The best option we can offer would be a new connector and wiring harness pigtail as we don't carry the factory plug in harness that goes from the vehicle's main wiring harness to the trailer connector. This might be able to be obtained from the dealer but if not your only option is to hardwire as mentioned previously. For this, I recommend using the 7-Pole and 4-Pole Trailer Connector Sockets part # HM40975-11998 which comes with both a 4 and 7-way so there is no need for adapters anymore,...
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  • Installing Pollak 7-and 4-Pole Trailer Connector # HM40975 on 2011 Toyota Tacoma
    Since it sounds like your Tacoma already has a 4-pole in place, I would recommend the # HM40975-11998. As you mentioned, this is the same connector used OEM on late model Tundras, F150s, Ram Trucks and now, even the 2014 GM trucks. There are two ways you can install this. You can cut off the existing 4-pole and hardwire it to the 11998 pigtail, if cutting off the 4-pole does not bother you. The wiring harness would then wire to the pigtail as follows: Harness yellow wire connects to...
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  • Replacement Trailer Wiring Harness for 2014 Ford E-350 with Tow Package
    Unfortunately, we do not have a harness for your 2014 Ford E-350 that will plug into the connector in your photo. For a replacement you can hardwire in the # HM40975-11998 to install a 7-way connector. You can either cut off the connector you have and wire this in place or splice in.
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  • Recommended 4/7-Way Trailer Connector and Brake Controller for 2022 Ford E-Series Cutaway
    In order to add a trailer connector to your 2022 Ford E-Series Cutaway you'll want to use the 7-Pole and 4-Pole Trailer Connector Sockets part # HM40975-11998 which is a complete kit that comes with everything you need from the wiring harness to the trailer connector and mounting bracket. It also contains both 4 and 7-way trailer connection points. I have attached an install video for you that shows how to get it installed. Unfortunately, there are no plug and play options for this so you...
    view full answer...

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