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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
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Custom Fit Vehicle Wiring

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Hopkins Custom Fit Vehicle Wiring - HM40975-11998
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Product Images

In Use/Installed

Customer Photos

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. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number HM40975-11998 or order online at etrailer.com. Free expert support on all Hopkins products. Guaranteed Lowest Price 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
  • Hopkins
  • 4 Flat
  • 7 Blade
  • No Converter

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.


Features:

  • 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


Specs:

  • 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 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   (305 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.

- HM40975-11998
by:

Easy to install and works great. 719704



- HM40975-11998
by:
2018 Chevrolet Colorado

Fit my 2018 Colorado nicely. One year later and no rusting. 715111



- HM40975-11998
by:

Love etrailer! They always have what I need at a good price. The videos rock. The only thing missing is that I'd like one of the guys come install it for me!!! 708320



- HM40975-11998
by:
2016 Chevrolet Colorado

Great quality quick delivery excellent how to videos on installation already order more parts from them. 686787



- HM40975-11998
by:
2016 GMC Savana Van

Good product. A dust cover for the back of the plug in socket would have made the product excellent. The open area on the plug will catch water and dirt. Color coding of wiring was off, usage of my volt ohm meter confirmed all the wiring connections. Liked the wiring information molded into plastic covers. 714349


Comments
When the wiring harness is plugged into the back of the trailer connector socket, there should not be an open space to allow dirt and water to get in. To make sure this connection stays free of dirt and grime, dielectric grease # 11755
Dielectric Grease for Electrical Connectors, 2 oz.
$10.64
can be used at the connection. It is always a great idea to test wires for function before making connections. I have linked a photo of these wires connected showing that the wire colors do not match the factory wire colors. It would be very rare that the colors did match by function.
-- Victoria B - 10/21/2019

62957

- HM40975-11998
by:
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. 483732



- HM40975-11998
by:
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. 568900



- HM40975-11998
by:
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 jeff 436582



- HM40975-11998
by:

I was tired of having connection issues with the 7 pole to 4 pole adapter and opted to replace my existing plug with one that had both the 7 and 4 pole sockets. This looks like it will last. The 4 pole socket has sturdy brass sockets that should last as long as the truck. It would have been nice to have a piece of paper with the color codes for the wiring harness but a few minutes with an ohm meter solved what went to what. The longest part of the install was figuring out where to mount the bracket. 65615



- HM40975-11998
by:

It was okay - worked for a few months, then corroded and gave up the ghost. Nothing really above the competition. I pull a farrier's trailer every day, 6 days a week, so I absolutely rely on a good wiring harness for lights and electric brakes. A vastly better option (which I have had since the last one died), that is still going strong without a flinch despite being covered in road dust and salt, are these: https://www.etrailer.com/Wiring/Pollak/PK11404.html https://www.etrailer.com/Wiring/Pollak/PK11402.html Solid metal construction, never get a loose connection, no corrosion - not even on Virginia backroads in the winter. Now, those above are only 4-pole connectors, they do make a 7-pole version as well (which I use). I whole-heartedly recommend them. 269525



- HM40975-11998
by:

From start to finish, this has been a great experience! I wrote a detailed email explaining my situation. Within 24 hours, I received a response with a link to the exact product I needed. Product was priced well with good shipping rates. Order was shipped out 2 days later and I received an email that it would get to my house on Tuesday, but the part showed up 3 days early!! It's almost like Christmas!! I haven't yet had time to install the product, because I literally received it just one hour ago, but it's easy to tell that this is a super quality product. I was actually expecting a flimsy bracket that might have to be reinforced...not required. Very heavy duty bracket with self-tapping screws included along with wire connectors and of course the connector itself. I am very happy with my purchase and if will follow up with pictures and more if I can. 275434


Comments
Excellent! Simple install for most anyone with a basic understanding of wiring. Connector works as great today as when I first installed it shortly after posting my initial comments.
Brian R - 07/23/2017

26485

- HM40975-11998
by:
2016 Chevrolet Colorado

Easy installation! Kit only supplied 6 connectors when there were 7 wires ...... oops! 362344


Comments
Steve, the 6 connectors are correct. The ring connector that attaches to the ground wire is the 7th connector.
-- Laura E - 01/24/2018

33610
Comments
I still like the wiring harness I purchased from your company last year. Thank you for asking.
Steve B - 04/04/2018

36814

- HM40975-11998
by:
Honda Pilot

This product is very good amd well woth the price. I would have given it an excellent rating if the wiring information that comes with it was a little more descriptive, especially for someone that doesn't do much electrical wiring. If I hadn't ordered the plug-in tester, it would have been a very long afternoon. The bracket is excellent, the self-tapping screws work fine if you drill a pilot hole before trying to insert them, there is plenty of extra wire to work with and the connector and harness snap together perfectly. The locking clip on the wiring harness is a little tricky, so watch the installation video before you start. All of the parts seem to be made from quality materials. Be sure to have a multimeter available while deciding which wires from your tow vehical need to be connected to the harness wires and have a friend around to help with the testing process. 233838



- HM40975-11998
by:

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. 617820


Comments
Installation installation and wire color coding information is provided and linked above in the product description.
-- Mike L - 07/17/2019

57930

- HM40975-11998
by:
Ford

Thanks plenty of wire to fix Ford's screw up! Ford dealer trying to sell me whole wiring harness from cab to bumper 900909



- HM40975-11998
by:

Easy to install. It works well. Never installed a trailer light connector before but it was easy to do. This is a good wiring project to start for beginners. 897932



- HM40975-11998
by:

Same as receiver, perfect fit and quali ty 893246



- HM40975-11998
by:

Just what I wanted 884861



- HM40975-11998
by:

881232



- HM40975-11998
by:

Excellent product 876432



- HM40975-11998
by:

You had the part i needed and it got to me right on time . Thanks for the good service . 876277



- HM40975-11998
by: 09/09/2020

good 876126



- HM40975-11998
by:

The price and quality are great! The install was easy and the etrailer install videos are especially helpful. Thanks 870731



- HM40975-11998
by:

Got exactly what I needed in a timely f ashion. 861828



- HM40975-11998
by:

Product said that it would not fit my 2012 F450 bust once I received it, the double door plug in matched exactly what was on my truck! 854415


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Show More Reviews

Ask the Experts about this Hopkins Custom Fit Vehicle Wiring

  • Installing Hopkins 4-Way/7-Way Wiring on a 2016 Chevy Colorado
    Yes, the Hopkins 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is in stock. Installing this on a 2016 Chevy Colorado should take no time at all (maybe 20 minutes tops if you aren't familiar with it?) because all you have to do is replace the knockout plug in the bumper with this connector and then splice in the wiring harness to the OEM wiring on the driver's side of the bumper. Since this wiring will be out in the elements I recommend using...
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  • Is the 7- and 4-Pole Trailer Connector Socket a Fit for Ford Trucks
    The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is a hard wire application, as you can see in the linked installation video we made of this being put on a 2008 Ford F-250. If you only need to connect the plug, which is 7- and 4-Pole Trailer Connector Socket # HM40975, that is a direct replacement for many different years, makes and models of Ford trucks with a factory 7-way; for example it is a fit for a 2018 Ford F-150. If you let me...
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  • Install Info for Roadmaster Invisi-Brake in 2018 Jeep Wrangler JL Unlimited
    I attached a diagram that shows how the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 wires to a vehicle's taillight circuits and also an install video we shot that shows this kit installed on a 2018 Jeep Wrangler Unlimited just like yours which I think will be the most helpful. The system taps into the signal lights of the tow bar lighting so that it can tell when you are applying the brakes in your tow vehicle which lets the system know it needs to start slowing the towed...
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  • Trailer Wiring Harness for 2007 Nissan Frontier XE Without Factory Tow Package
    For your 2007 Nissan Pathfinder without factory tow package you will need a kit that includes the relays to activate the trailer wiring. You can use TowReady # 118525 that includes the relays and which provides the 4-pole flat connector. This 4-pole will provide stop/turn/running light signals for your trailer. If you wish to add a 7-way socket for flexibility you can add Hopkins part # 37185. This is a combination 4-pole and 7-way RV-style socket that simply plugs in to the 4-pole from...
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  • 2016 Toyota Tacoma TRD Sport 7-Way Recommendation to Fit Bumper Cut Out
    You are on the right track for sure to install the # HM40975-11998. You would first need to start with a 4-way like part # C56349 and then to convert it to a 7-way you would need to cut off the 4-way of this hardwire and then hardwire it to the part # HM40975-11998.
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  • Parts Needed to Install 4-Way and 7-Way Connectors on a 2016 Jeep Wrangler Unlimited
    If you don't already have electrical connectors on your 2016 Jeep Wrangler Unlimited then you will need to start off by installing a 4-Way connector like the T-One # 118416. This plugs in behind your tail lights and will give you the basic lighting functions for your trailer. One the T-One is installed you need to install the Universal Wiring Kit # ETBC7. This comes with all of the wiring and connectors you need to have a fully-functioning 7-way (and 4-Way) at the rear of your Jeep. If...
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  • Replacement Trailer Pigtail Harness and Connector for a 2018 Ram 2500
    The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring part # HM40975-11998 is what I recommend using on a 2018 Ram 2500 as the pigtail and trailer connector would be the same as what would have come on the truck when rolled off the assembly line. If you have a cutout in the rear bumper for the trailer connector you can simply discard the included mounting bracket. Please disregard any fit notes on the product page. If you just need the pigtail harness you can...
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  • Installing a Brake Controller on a 2015 Chevy Colorado to Control Electric Trailer Brakes
    If the trailer has electric brakes that you want to use or that are required by law then you will need a brake controller to activate the trailer brakes. If your 2015 Chevy Colorado came with a factory 7-Way then the wiring to install a brake controller is located under the dash generally to the left of the steering column and held together with a white tag. The tag lists the functions of the vehicle wires. Brake controller wiring is white for ground, black for 12 volt power, blue for output...
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  • Additional Parts Needed to Install Roadmaster Invisibrake in 2018 Jeep Wrangler JL Unlimited
    With the Roadmaster InvisiBrake kit part # RM-8700 that you referenced the only thing else you need to install it in your 2018 Jeep Wrangler Unlimited JL is the stoplight switch part # RM-751000 and you'd be set. I attached a link to a video that shows this kit installed on a 2018 JL just like yours for you to check out as well.
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  • 7-Way and 4-Way Trailer Connection and Step Bumper for 1995 Ford F-350
    The Hopkins 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998 will absolutely work on your 1995 Ford F-350. Since you already have a brake controller, the wiring is likely already connected but it not you can find the tow package wires on the rear frame rail. If you haven't already purchased your step bumper, we have the Westin Fey Surestep Deluxe XLT Rear Bumper with Custom Installation Kit - Chrome Plated Steel # 21007-92230...
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  • Will Hopkins 7-Way and 4-Way part # HM40975-11998 Fit 2017 GMC Sierra 1500
    Your 2017 GMC Sierra 1500 will work great with the # HM40975-11998 that you have but in reality you only will have to use the 7-way portion of the setup. The # HM40975 portion of the setup is just the 7-way and bracket which will attach directly to the 7-way wiring that your truck already has. There would be no need for hardwiring. Check out the install video I attached for more info as well.
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  • Replacement Trailer Connector for a 2012 Ford Super Duty
    The harness you see pictured in connector # HM40975-11998 plugs into the back of that connector so it would look like the opposite of what is on the back of the connector. If you do not need the wiring harness part then you would just use # HM40975. If you do need the harness it will have to be wired into the trucks tow package wiring by function by testing the vehicle wiring using a circuit tester such as # 40376 to determine the functions. The wire functions of the harness in # HM40975-11998...
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  • Can I Use Both The 7-Way and 4-Way At The Same Time?
    I have a solution for you, but you won't be able to use both the 7 way and 4 way plugs on the Hopkins # HM40975-11998 at the same time because the cover flaps do not allow for both to be open simultaneously. In order to plug both your 7 way and 4 way into the same plug you would need to use the Curt Trailer Connector Adapter # C57672 , which has the plugs side by side with dust caps that flip up to allow you to connect your plugs as desired. If you don't already have a wiring harness...
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  • Installing a 7-Way Trailer Connector On a 2002 Toyota Tundra with 4-Way Flat Connector
    Since the Hopkins 7 and 4-Way trailer connector # HM40975-11998 includes a hardwire harness it technically could be installed on any vehicle, including your 2002 Toyota Tundra with a 4-Way connector. But you will need to do some hardwiring and extra parts would still be needed so to make it more simple I recommend # ETBC7. With the ETBC7 all you will do is plug the 4-Way into it and then hardwire the remaining 4 wires. White is ground, attaches to truck frame, purple is reverse lights...
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  • Adding 7-Way and 4-Way to 2017 Toyota Tacoma Without Tow Package
    The reason the 7-Pole and 4-Pole Trailer Connector Sockets # HM40975-11998 has more wires than the 4-pin is because this part is used for a 7-way and 4-way. We can help accomplish your goal but first you would first need to add 4-way # 118685. From there you will need # 5506, which is similar to the # ETBC7, to get the functions of the 7-way and you can then hardwire # HM40975-11998 to get the look you want. There is no video for how to accomplish specifically what you want to do, so...
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  • How to Install a 7-Way Trailer Connector on a 2002 Ford F-450
    In order to install a 7-way trailer connector on your 2002 Ford F-450, I recommend using the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring part # HM40975-11998. Unfortunately, we do not have any plug and play trailer connectors compatible with your vehicle therefore hardwiring will be your only option. There should be a pigtail or group of blunt cut wires that are tied off on the drivers side frame near the spare tire that will hold the functions for the...
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    Installing a 7-Way and 4-Way combination trailer connector, like part # HM40975-11998, that you referenced, on your 1995 Ford F-350 is fairly easy, but for these trucks there are 2 different wiring situations if you do not have a factory 7-way trailer connector. If your vehicle has factory 4-Way trailer wiring at the back you can use the Pollak 7-Pole and 4-Pole Trailer Connector, # HM40975-11998, and splice the wires to the wires under the rear of the vehicle along the drivers side...
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  • How Long is Wiring Harness of 7-Pole and 4-Pole Trailer Connector Sockets
    The wiring harness that comes with the 7-Pole and 4-Pole Trailer Connector Sockets with Mounting Bracket and Wiring # HM40975-11998 measures 4 feet long; if you need more length of wiring you can add Deka Wire - Jacketed 7-Wire - per Foot # DW04914-1. I have added a link below to a video review for you to check out as well of the 7-Pole and 4-Pole Trailer Connector Sockets with Mounting Bracket and Wiring # HM40975-11998.
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  • Testing Wires of 2007 Ford E-350 Super-Duty for Installing 7-Way
    We can help you determine what the functions of the wires on your vehicle are for, but we don't have that info by wire color. You'll need to use a circuit tester like part # PTW2993 to test each of the wires as you apply the different taillight functions to determine what each wire carries. Then you can wire them to the 7-way part # HM40975-11998 and be set. I attached a diagram for the wire colors of the 7-way for you to check out.
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    For your 2004 Holiday Rambler Endeavor, I recommend you use a 7-way instead of a 6-way and get a connector like the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998. This kit will give you the trailer connector, the mount, the butt connectors and the ring terminal for installation. The wiring of this trailer connection is as follows and I recommend using a circuit tester like # PTW2993 to ensure you match function to function on...
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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 7-Way Trailer Wiring Harnesses For 1996 Dodge Ram Pickup
    We have all of the wiring you need for your 1996 Ram, but there is no all-in-one harness available. First I recommend part # HM40975-11998. This is a 7-pole and 4-pole trailer connector with the bracket and wiring. This will hardwire to the existing wires you have for your 4-way. You can use a circuit tester like part # 40376 to identify the wires when you are attaching them. Next, I recommend part # 5506. This is a universal wiring kit for brake controllers. This includes wiring...
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  • Adding a 7-Way Trailer Connector to a 2002 Ford F-150 with Factory 4-Way Flat Trailer Connector
    You should be able to trace the 4-Way harness towards the front of the truck and find where it connects to another connector. The connector should be square and look like the plugs for # 118242. Adding this harness and the relays/fuses it comes with will provide you with a 7-Way trailer connector. You could then just use an adapter, # PK12716, when you need a 4-Way. You could use # HM40975-11998 and hardwire it in to the factory wiring harness on the forward side of the truck. You would...
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    If you have a 7-way on your 2017 Honda Ridgeline, the US Car connector in your picture will allow you to put it right in line with a factory 7-way...just plug and play. If you don't have a 7 way, I recommend the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998 and hardwire it utilizing the # 5506 wiring kit. This will give you a 7-way US Car connection as well as a standard 7-way trailer connector as well as the 12V battery run...
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  • Replacement 7-Way Trailer Connector and Wiring Pigtail for 2013 Ford F150
    I'm not sure what you mean by harness clips, but the # HM40975 will work as a replacement for the existing 7-way on your 2013 Ford F150. If the US car connector that plugged into the back of your existing 7-way has been damaged, then you can cut off the existing US car connector and wire on the # PK11998 pigtail. The pigtail wires are color coded as follows: Red - Left Turn and Stop - 14 gauge White - Ground - 10 gauge Blue - Electric Brakes - 12 gauge Green - Right Turn and Stop...
    view full answer...
  • Recommended 7-Way Trailer Connector and Brake Controller for 2016 Chevrolet Colorado Work Truck 2WD
    For your 2016 Chevy Colorado without trailering package I recommend the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998. This will come with the wiring pigtail and everything you need. I recommend using heat shrink butt connectors like # DW05745-10 for a better seal and more resistance to the elements because of the location. I've also attached a video of the installation to assist. Then if you need a brake controller for a...
    view full answer...
  • Needing a 6-Way to 7-Way Adapter for an RV with a 6-Way Pin to Connect a Race Car Trailer
    I have a couple solutions for you, but the adapter you are looking for doesn't currently exist. The square 6-way style connectors are an older style that really aren't used anymore. Your best bet is to replace the 6-way on your Holiday Rambler with a standard 7-way like # HM40975-11998. To install this, remove the wires from your current 6-way and splice the wires together by function. Use a circuit test like # 40376 to test the wires on your Rambler because it's likely the colors won't...
    view full answer...

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Info for this part was:

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