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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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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




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

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




Video Transcript for Trailer Wiring Harness Installation - 2018 Chevrolet Colorado

Speaker 1: Today in this 2018 Chevrolet Colorado, we'll be having a look at and showing you how to install the Hopkins 7-pole and 4-pole trailer connector sockets and wiring, part number HM40975-11998.Here's what a wiring harness looks like installed. Now the reason you're going to want this wiring harness over other options is because this gives us a 7-way here, which gives us the ability to tow a trailer with electric brakes, provided you have brake controller installed in your vehicle and it also gives us a 4-pole flat. So if we're towing just a small trailer and only need lighting functions, this will be a great way for us to be able to tow both trailers without needing any adapters. The most common connectors you see on trailers are either a 7-pole, like the hard top one, or a 4-pole, like our bottom.Another great feature about this, is that this gives us a very factory-like appearance on our Colorado. Matter of fact, this exact piece right here is actually used by several manufacturers during the manufacturing process on the vehicle.Our doors are spring-loaded and as you see, we have a nice rubber seal around them to help keep elements out of the inside of our connector, which could cause corrosion over time. This will make sure we have a nice solid electrical connection with any of our trailers so we don't have to worry about short circuits or poor performance from brakes or lighting.And now that we've gone over some features, we'll show you how to get it installed.To begin our install, we went head and removed our spare tire.

We have a look up on our driver's side frame rail, we'll see this bundle of wire here. We're going to unclip it from the frame using a trim panel tool. You could also use a flathead screwdriver. Now we have it where you can work with it. Now on our bumper area, right where our license plate is, on the driver's side, we have this dummy plug.

We're going to press on the tabs on the side and pull it out of the vehicle. These are the tabs that we're pressing on, on the side. If they've come unclipped when you're pulling it out, don't worry about it. We don't need them anymore. We're going to be throwing this away anyway.And now we have our new 7-pole, with our 4-pole on the bottom.

We're going to insert this through the back side of our bumper. The flat part here will face down, so it'll go in this notch. We'll simply just take it and push it in till it clicks into place.We went ahead and removed the electrical tape that covered up our bare wire leads here. You can see that they're sealed with a little bit of heat shrink. We need to remove this heat shrink and expose some of the wire, so I'm going to strip back some insulation from it.

And we'll do this on all of the wires.And with all of our wires stripped back, we can start attaching our Butt connectors. Our kit comes with standard Butt connectors, which are okay in most applications, but since we're underneath the vehicle, in an area that is exposed to the elements, we're replacing these with 10 - 12 gauge heat shrink Butt connectors, which we have available on our website. So we'll start with our thicker wire here first. Cut off the excess part that was stripped back. Take your Butt connector, stick it over the wire, and we'll crimp it into place.Now our thinner ones are a little bit different. These we'll fold back upon themselves a couple of times to make them thicker, stick them inside of our Butt connector and we'll crimp it down. And we'll repeat the same process for all the wires.Now we'll take our wiring harness that our kit comes with and we'll strip back insulation from each wire. Now we'll start making our connections. Our blue wire on our wiring harness will go to the blue wire on the vehicle. And this will be for our electric trailer brakes if we ever decide to put a brake controller in this vehicle. The white wire here will go to our black wire, this is our ground. Now we'll do our 12-volt power wire. There's this black wire. That'll go this orange wire on the vehicle. Our brown wire will go to the brown wire. Our green wire will go to our green wire on the vehicle. Now we'll take our yellow wire form our harness and then I'll go to the gray wire on the vehicle. And that leaves us with our red wire. Our red wire will go to the yellow wire on the vehicle.Now we use a heat gun to shrink down our Butt connectors.We went ahead and wrapped up our colored wires and Butt connector with some electrical tape just to help even better protect it and to give it more factory-like appearance. Now we'll clip our wiring harness back into the frame. We'll take our end here, our 7-pole already had pre-installed dielectric grease on it, but if you want to pick up some additional dielectric grease, we do have some available on our website. So we'll just match up the slot, push it till it clicks into place, then slide this lock tab towards the connector and that'll secure it.We went ahead and secured up our excess wire with a couple of zip ties behind our bumper here, so it's not going to be in the way of our spare tire or dangle below the vehicle. Now we do have zip ties available on our website if you do want to purchase some.Now we have a 7-pole tester here and we'll test all of our functions that we can. We won't be able to test our brake controller function because we don't have a brake controller installed. We'll flip the switch here and see we have constant 12-volt power going to our 7-way connector, so that's good. Now I'll hop in the truck and I'll run through all of our functions here, just to make sure they're working.Okay, I turned our headlights on and as you can see, our clearance light and tail light function's working. Step on our brake pedal now. Our brake lights are working. Turn our key on here and I'll run through our turn signals. We have a left turn signal, a right turn signal, and with out foot on the brake, we'll run through the turn signals again to make sure they both work properly. Now I'll start the engine and put it in reverse to make sure our reverse light function will work.Perfect. All of our functions are working properly.And that completes our look at and installation of the Hopkins 7-pole and 4-pole trailer connector sockets and wiring, part number HM40975-11998 on this 2018 Chevrolet Colorado.


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   (262 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:

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:
2018 Chevrolet Colorado

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



- 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:

Great plug just right for what I wanted to do 634574



- 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.
$10.27
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:
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:

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:

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:
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:

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:

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:
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:
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:

Best service and experience I have had with an Internet order in years. Alyssa, took my order, (I called to confirm that I was getting exactly what I needed.) She was extremely thorough and even called their tech support ( who were right there handy and knew what they were talking about). We confirmed exactly what I needed, she asked me to send her a pic from under the truck at the hitch to confirm since I just drove it off the lot. The hitch and the wiring harness were a perfect fit and I got it all installed with out any issues. She even sent me a video of the installation of both the hitch and the wiring harness. It went flawless and I'm hooked. I'll be a customer of Etrailer from now on. I live way out in the country and it's a long drive to town of things don't go right. This was a fantastic experience. 350388



- HM40975-11998
by:
1987 Chevrolet C/K Series Pickup

Excellent quality and strength. Why skimp on something as important as your hitch? I have purchased three of these Draw Tites - I guess a repeat customer will scream about the true quality a company can garner from repeat customers. When you pull show cars worth six figures, you can't afford a poorly made hitch. Step up, step out, and don't fret what you are pulling. 371585



- HM40975-11998
by:
Chevrolet

Works great as a replacement for an old six way round pin conductor on our '03 Chevy Express conversion van that didn't connect to our trailers. We use it nearly every month hauling the Boy Scout trailer with the standard 7-way flat connection around to our various outings. It's great having the dual 7-way and 4-way hook up options in one set up. The wiring pigtail made connections easy and straight forward. I'd buy it again if needed. 360517



- HM40975-11998
by:
2018 Chevrolet Colorado

Easy install and good directions. I purchased several items from etrailer and am very happy with their inventory and quick delivery. Can’t go wrong here 746658



- HM40975-11998
by:
2016 Chevrolet Colorado

Easy install. Video was helpful but directions would have helped. 745285



- HM40975-11998
by:
2016 Chevrolet Colorado

Looks vary good. On line install video great help. Thank you Etrailer 739232



- HM40975-11998
by:

I received my hitch in two days said it would it take probably a week before I get it, took about three hours to install and do the wiring mainly had a hard time removing the bolts from the bumper installation was easy and wiring was simple Very happy with my hitch 737967



- HM40975-11998
by:

It looks like factory. 734597



- HM40975-11998
by:

Everything fit perfect, just follow the color matching in the video. 729828



- HM40975-11998
by:
Toyota

The fit was perfect. The only thing I can tell you is read the instructions carefully. There are wire color changes that will ruin your day. One would think that following color to color would work. It does not. After having to rewire everything worked just as expected. I also ran the brake wire to the front on the Toyota harness set just in case I add the brake controller. Thanks etrailer. 726455


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  • 7-Way Wiring Harness for 2013 Ram 1500
    Yes, the Pollak 7-Pole and 4-Pole Trailer Connector # HM40975-11998 could be hardwired to your 2013 Ram 1500 but we do offer no-splicing direct plug-in 7-way 5th wheel harness kits like # PK11893-11932 that fits the Ram with factory 7-way. We also offer just a 7-way/4-pole socket, part # HM40975 that connects to a round U.S. Car connector. If your truck has neither a factory 7-way nor a 4-pole you can instead use 4-pole kit # 119179KIT and then add our # ETBC7 7-way kit. Together these...
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  • Adding a 7-Way Trailer Connector to a 2008 Toyota Highlander Hybrid with Existing 4-Way Connector
    You could install the Pollak 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 on your 2008 Toyota Highlander with the 4-Way, # 118449 already installed. You would have to cut off the 4-Way plug on the 118449. Then the white wires would connect to each other, the 4-Way brown wire would connect to the 7-Way brown wire. The 4-Way yellow wire would connect to the 7-Way red wire. And the 4-Way green wire would connect to the 7-Way green wire. On...
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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...
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  • Recommended Wiring For US Car Connection And 7-Way Trailer Connector On 2017 Honda Ridgeline
    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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  • Obtaining Brake Stoplight Switch Signal for Brake Controller Install On 2011 GMC Terrain
    The brake stoplight signal can be accessed at the BCM, As you are sitting in the drivers seat, the BCM (Body Control Module) is located under the dash above where your left knee would be. The module (think of it as a junction box) will have 7 different wire connectors that plug into it. Look for the black connector (all the connectors are different colors) that has 26 different slots for wires to insert into. In wire position # 11, there will be a white wire that carries the brake stoplight...
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  • Replacement 7-Way Recommendation for a 1997 Jeep Cherokee
    Since your 7-way does not have a round connector that would allow it to easily disconnect from your wiring harness you would want to go with a replacement 7-way that has a lead of wires like the part # HM40975-11998 so that you can wire your vehicle's wiring to the 7-way. You will need to use a circuit tester like part # PTW2993 to test the functions of all of the wires on your vehicles trailer wiring so that you can wire up the new 7-way by function.
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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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  • Interior Trailer Lights Not Working When Connected to a 2016 Ram 2500
    My first question is to what are the interior trailer lights connected? They should be connected to the 12 volt circuit, if connected only to the trailer connector, or to a battery mounted on the trailer. If they are connected to a battery on the trailer then there is some wiring issue on the trailer somewhere between the lights and switch or the switch and battery. If they are connected to the 12 volt circuit on the trailer connector only then check the corresponding pin on the vehicle...
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  • Interior Lights Not Working in a New Trailer with 7 Pin Wiring Harness on a 2002 Jeep Liberty
    It sounds like you may need to install a fuse in the fuse block under the hood on your 2002 Jeep Liberty to get the 12 volt power circuit at the OEM 7-Way connector to work. But the first thing I would do is check the bulb just to be sure it is not bad, then check to see if the interior trailer light is connected to the running light circuit. Turn on the running lights and if there is a switch in the trailer make sure it is on. If the light does not light, then you can check the power circuit...
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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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