Price: $49.15

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

Item # HM40975-11998

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Product Images

hopkins custom fit vehicle wiring 4 flat 7 blade 7-pole and 4-pole trailer connector sockets w/ mounting bracket - end
hopkins custom fit vehicle wiring no converter 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade 7-pole and 4-pole connector sockets w/ mounting bracket - end
hopkins custom fit vehicle wiring trailer hitch
hopkins custom fit vehicle wiring no converter hm40975-11998
hopkins custom fit vehicle wiring no converter 4 flat 7 blade
hopkins custom fit vehicle wiring 4 flat 7 blade hm40975-11998

In Use/Installed

2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch 4 flat 7 blade 7-pole and 4-pole connector sockets w/ mounting bracket - end
2016 chevrolet colorado custom fit vehicle wiring hopkins no converter hm40975-11998
2016 chevrolet colorado custom fit vehicle wiring hopkins no converter 4 flat 7 blade in use
2016 chevrolet colorado custom fit vehicle wiring hopkins 4 flat 7 blade hm40975-11998
2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch 7-pole and 4-pole connector sockets w/ mounting bracket - end
2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch in use
2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch no converter in use
2016 chevrolet colorado custom fit vehicle wiring hopkins no converter 4 flat 7 blade hm40975-11998
2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch no converter 7-pole and 4-pole connector sockets w/ mounting bracket - end
2016 chevrolet colorado custom fit vehicle wiring hopkins trailer hitch 4 flat 7 blade hm40975-11998

Customer Photos

hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring trailer hitch 4 flat 7 blade 7-pole and 4-pole connector sockets w/ mounting bracket - end
hopkins custom fit vehicle wiring no converter 4 flat 7 blade hm40975-11998
hopkins custom fit vehicle wiring no converter 4 flat 7 blade in use
hopkins custom fit vehicle wiring trailer hitch in use
hopkins custom fit vehicle wiring no converter hm40975-11998
hopkins custom fit vehicle wiring 4 flat 7 blade 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. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number HM40975-11998 or order online at 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.

Hopkins Custom Fit Vehicle Wiring - HM40975-11998

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

This Product Fits The Following Vehicles

2015 - 2018 GMC Canyon without factory 7-Way

2015 - 2018 Chevrolet Colorado without factory 7-Way

Related Products

Customers Who Purchased This Custom Fit Vehicle Wiring Also Bought...

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 Hopkins Wiring HM40975-11998 Review

Today we'll be reviewing part number HM40975-11998. This is the Pollak 7-pole and 4-pole trailer connector sockets with a mounting bracket and the wiring. The dual connector is going to let you hook up to a trailer with either a 7-pole RV style plug or a 4-way flat plug. It's also going to feature the pig tail harness that hardwires into your vehicle and connects to the 7-way socket with the easy click connect connection. It also includes the color coded 7-wire leads and the 1/2-inch convoluted tubing to protect the wires. The easy plug is going to form a weather tight seal on the back of the socket to keep out moisture and to prevent corrosion. On the inside of the lids we have the rubber gaskets that are going to provide excellent weather protection as well as the integrated stainless steel springs that let you easily open and close the socket covers.

This portion is made from a high impact ABS plastic construction so it's going to be extra durable and then over here we have the sturdy steel mounting bracket that installs on the bumper with the included screws. It has a nice black epoxy coating and it's going to stand up well against rust and corrosion. You're also going to have the butt connectors and the ring terminal. We'll go over the wiring configuration. Your red wire is going to be for left turn and stop, that's going to be a 14-gauge. Your white wire is going to be for a ground, that's 10-gauge. Blue is electric brakes and that's 12-gauge.

Green is right turn and stop, that's going to be 14-gauge. Black is for your battery connection, that's going to be 10-gauge. Brown is going to be for your running lights, that's 14-gauge; and yellow is for your reverse lights and that's going to be 14-gauge. Total length of wire that you have is going to measure 4 feet in length and that's going to do it for today's review of part number HM40975-11998. This is the Pollak 7-pole and 4-pole trailer connector. .

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   (154 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: jeff g09/26/2017

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: Oly S.02/18/2017

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...... 343311

- HM40975-11998

by: Valley Import Center09/18/2014

This is a great idea for the person that tows several different types of trailers. Our repair center has been using etrailer for many years and they have great products and great customer service. 151868


Most all products I purchase from you are for my customers. I manage an Auto Repair center and we provide trailer hitch and wiring installation. I have spoke to this customer recently and they are happy with the product and have not had any problems.

Valley I - 09/28/2015


- HM40975-11998

by: Nolton L.06/04/2014

very well made product. I would recommend this to anyone. The installation could be more detailed but if you can use a meter you should be fine. I have put one on my wife's truck and mine. I will be ordering from etrailer again. A video for Toyota Tundra would be nice too !!!!!!! What about it etrailer ???? 134337


Thank you for asking.Im very satisfied and will recommend to anyone.

Nolton L - 06/09/2015


- HM40975-11998

by: SCDuck12/15/2015

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: Rush07/23/2016

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


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


- HM40975-11998

by: Dan D.02/27/2017

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: Nathan C.09/20/2013

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! 100799

- HM40975-11998

by: Ian H.07/08/2016

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: 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: Keith T.07/08/2016

Quality product, good price, relatively easy to install. A few observations that do NOT reflect badly on this product. I had a broken pin in my old connector. If I had known that the plug on the end of the new wiring was identical to the factory plug, I may not have cut & spliced, I would have tried to plug it in to the new connector! The wire color on the new harness was standard & correct. black=positive, white=ground, blue=electric brake... but did not exactly match my ford harness. And lastly, the factory bracket was welded to the hitch so I had to chisel/grind it off to mount the new on in the same place; though there's room on the opposite side to mount the new one without removing the old one. 269283

- HM40975-11998

by: Mark l05/28/2014

Used this item before have one in my up now is going in motorhome 133105


Worked good should be a waterproof boot on the wiring or shrink tubing to keep water out as it is on back of rig behind rear tires

Mark l - 05/28/2015


- HM40975-11998

by: Ron Allred08/09/2015

Very good product and a complete kit to do what the vehicle manufacturer(Ford) skimped on. Their wires were too small--but what can you expect for a $60,000 plus vehicle!!! 218030



Ron A - 08/08/2016


- HM40975-11998

by: Miranda11/04/2017

Bought for my Colorado came in with the receiver hitch and in good packaging Install is extremely simple with very easy access but the colors do not match up so I used the Etrailer installation video to make sure I had them right. The Colorado pigtail has a ground so instead of grounding you will need to get another butt connector and might as well get a multipack because the ones that came with the package are cheap and ill thought of since the wiring is not only outside but under your truck... Plenty of extra wire to ziptie it to where you want, I just did what the video did, looks clean. 449043

- HM40975-11998

by: Eric denis11/09/2017

Trailer tow bar and wire harness just arrives so I don't have a comment about its actual performance. It looks good, no reason to suppose there is a problem. Michael, the agent who followed this through was very helpful. The is one issue. The box arrived via UPS. It was immediately obvious that the two ends of the tow bar with the bolting flanges had penetrated the card board. As large as the box is, it appears there needs to be more (Styrofoam?) blocking at these ends and perhaps in the middle. I'll try to send a photo; having trouble uploading it here. 450646

- HM40975-11998

by: Cecil08/01/2017

I bought this to install on my truck because it didn't come with one I did it in my driveway watch the video on the website gave me clear instructions on how to do it color coding for the wires which connectors to use everything went without any problems took me about 15 minutes from start to finish excellent product would highly recommend it!!!!! I can't say enough about etrailer they're the only site I've run across that has videos on the exact product and installation you're working with great job guys thank you! 413632

- HM40975-11998

by: Robert J07/25/2013

Like the looks and quality feel of the product. The plastic catch that keeps the wire connector from coming out of the back of the connector did break off on and I had to use electrical tape to secure it, so be careful plugging and unplugging it. But I can't understand why the instructions didn't have a chart telling you which color wire goes to what connection. This 7 way doesn't use the standard colors that a 4 way uses. So I had to use their chart and figure out what color went to each connection on my truck. 91501

- HM40975-11998

by: Todd H02/10/2013

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: Stephen D.09/05/2017

Great product and very good quality. The 7/4 pole connector fit right into the factory hole on my wife's 2017 Chevrolet Colorado. The ONLY reason that I did not give 5 stars is that it came with NO INSTRUCTIONS. I had to go back to the website to search for instructions and still no instructions. I only found a picture of one already installed and prayed it was correct. We used the boat yesterday and the picture was correct and lights worked. Please include instructions for the future. 429093


Great idea, Stephen! We do have an installation video on the 2016 Chevy Colorado, which may be found here:

-- Laura E - 09/06/2017


- HM40975-11998

by: Jeff mc09/28/2012

Very nice and solid product, EXCEPT for the locking clip on the wiring harness plug which is VERY fragile. I broke mine while being very careful. I recommend planning your install so you connect the plug ONCE only. In my install I was able to assemble the socket and plug on the bench and then tape up the whole assembly to hold it together and shed water before sliding it in the hole in the hitch. Hopefully tape will hold the plug on the socket as the fit is loose. 56088

- HM40975-11998

by: Brett D.03/30/2017

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: Scarppys Towing04/03/2015

The plug kit was just as described. Only problem I had with it was the cheap self taping screws aren't worth there weight in metal. I had to pre drill the wholesale but no big deal. Fast shipping. Price was a little proud. Also thought there should have need the option for just a 4 pole wiring instead of the 7 pole. Item was as described and works perfect. Glad I got it once I put it on. 182574

- HM40975-11998

by: Dan C.12/17/2014

Great product!! Almost exactly the same as what came on our 2015 Ford Super Duty stock. The only thing I can find that is different is the bracket that holds the plugs is slightly different. This is most definitely a great product and seems very heavy duty. Etrailer has been great. Fast processing and shipping. All in all, a super purchasing experience!! Thanks etrailer. 165855

- HM40975-11998

by: bowtieollie04/18/2017

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


This is the kind reviews we love to hear, bowtieollie!!! Thanks for taking the time to write a great review and for rating this product.

Hopkins C from - 04/25/2017


- HM40975-11998

by: Jim P.12/30/2013

I picked this up to replace a beat up OEM plug and bracket on my 2008 F250 company truck. This is the same receptacle and the harness is the same also, however this bracket is designed to bolt to the bumper while the OEM one bolts to the bottom of the receiver. I'll have one of the guys in our shop weld the bracket to some steel plate so I can mount it like the factory one. 111517

- HM40975-11998

by: Evansdale fire dept.05/04/2015

Product was great. Was exactly what I thought it would be. I watched the video of what wires to hook up from the harness to the truck. One was all hooked up I tried the lights and none of them worked like they should. I had to cut the wires and figure out on my own what wire did what. I should have skipped the video and saved myself some time. 189692

- HM40975-11998

by: Michael M.06/17/2012

The trailer connector is just the ticket. It's well thought out and not too bad to install---that is if you buy from They can't be equaled for do it your self advice as well as the videos that I would have been dead in the water without. I have a 1978 Argosy Minuet with entirely different wiring order. Thank You Again I'll be back. 44531

- HM40975-11998

by: Wes09/26/2014

You see this product coming out on vehicles from the factory OEM, so I figured I'd be happy with it on my restored 70 Chevy PU. I haven't installed it yet but I have no doubt it will be a reliable trailer wire connection for a good chunk of time. Thanks for the good service I pretty much buy all my towing supplies from you guys. 153188

- HM40975-11998

by: Timothy01/27/2013

This is exactly what I was looking for my 1999 GMC Sierra 5.3. It didn't have the factory tow package and I wanted both connectors. The 2002 Silverado video is perfect, but if you have a 99 the wiring colors are different. For mine: light green = backup, brown = running lamps, dark green = right turn, yellow = left turn, and white = ground. 64242

- HM40975-11998

by: KYLE A09/21/2017

Very good product! Comes with everything you need. Packaged very well and was delivered in 2 days. The only complaint I have is that the wiring pigtail doesn't come with a guide that tells the pigtail wire color that corresponds to each function. I had to just figure it out. Not a big deal, but it made the job more time consuming. 434950

- HM40975-11998

by: Mel11/28/2017

Wiring harness arrived when expected and in great shape. It fit perfectly and works fine. Two negatives: 1} No wiring instructions were provided. (Had to watch online video for correct wiring). 2} Butt connectors provided should have been "blue" for 5 wires and "yellow" for 2. Instead, 4 "yellow" and 1 ring terminal were supplied. 455325

- HM40975-11998

by: Tacoma Stan09/11/2016

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. 293467

- HM40975-11998

by: John K.06/10/2016

Excellent product. Watch video and you can install in minutes. All wiring explained and harness and 7pole/4pole connector fits perfect in 2016 GMC Canyon. Recommend to anyone with Chevy or GMC without trailer package. Wires were under rear of truck and butt connectors connected up for clean factory install. 260004

- HM40975-11998

by: DaveB12/26/2016

Found what I needed, ordered things, and received them promptly. Sure beat driving miles in my area looking for the vendor who MIGHT have what I needed. And the price was below what I was able to find locally. Seems that retailers do not stock specialty items much anymore, so why not order for myself? 329580

- HM40975-11998

by: Mark G02/09/2017

Very nice, heavy duty, was all it was discribed to be, watched the video before install was very helpful, good quality at a good price, came on ship date, installed a new hitch, and wanted it to be wired when the time comes to tow something, will test the plug soon, thanks for the Quality product,. 340044

- HM40975-11998

by: Sean05/31/2016

eTrailer is a great site. I looked all over for something to repair the trailer hookup on my 2008 F-250 and this was the best that I found. Not only did it come with everything that I needed for the install, but there was also a great tutorial video that I watched to know how to hook it up. 254252

- HM40975-11998

by: Drew S.02/09/2015

A very well constructed, and nice upgrade of the vehicle side trailer connector that gives you both a 7 pole connector as well as a 4 flat connector. Uses the factory wiring harness plug so you simply unplug the old one and plug in the new. Worked out great on my 2005 Chevy Silverado 2500 HD 172925

- HM40975-11998

by: Jeff03/30/2015

Easy install with all the available literature/videos. I just made sure I took the time prior to match up the colors from the truck harness to the Pollak 4 foot harness. The harness side just had a couple of colors that don't math color for color. In the end it was no big deal whatsoever. 181465

- HM40975-11998

by: David T.09/01/2016

Very high quality parts. Customer service does an excellent job. Comes in very well packaged in a box with lot of protection. They have instructions on youtube on how to wire this in and give detailed professionally and well crafted video instructions. Enjoyed working with them. 289805

- HM40975-11998

by: Vince03/19/2017

Installed the wire harness on a 2017 Colorado. Very easy installation, if you watch the video of the product, otherwise it may be tough because the wire colors on the harness do not match the wire colors of the pickup. Very happy with it, looks like it was installed at the factory. 355834


Thanks for your review and your business, Vince. Because wire colors vary, we recommend testing the wires on your Colorado to confirm their function before making connections. Use a tester like 3808 to confirm what function is carried on each wire.

-- Laura E - 03/28/2017


- HM40975-11998

by: Jeremy J06/11/2017

Received trailer plug very quickly. I was replacing the pigtail on a factory wiring harness on a 2004 Ford F150 and this wired in with just a few of the wire colors not matching up, but knowing what the colors were on the factory they were very easy to match up and wire together. 391929


Thanks Jeremy for the great review and rating!! Hopkins appreciates your business.

Hopkins C from - 06/20/2017


- HM40975-11998

by: Ian M04/01/2017

Great experience, will recommend etrailer to anyone I encounter. Product arrived when it was supposed to and worked like it should. The install video also helped a ton. Thanks a bunch to the etrailer team for having such a simple and successful business model! 361587

- HM40975-11998

by: Fred W.04/12/2017

I installed this product on my 2016 Chevy Colorado per the video instructions. It works perfectly as advertised. This item saved me almost $600. Which what the dealership had quoted me to hook up my trailer lights. I am more than pleased with Etrailer..... 366392


Great review Fred!!! Hopkins is all for saving money with quality products and we agree the videos are so helpful. We appreciate your business and are grateful you purchased our HM40975-1198 Connector. If you have any concerns or questions, please get in contact with us. Thank you !

Hopkins C from - 04/27/2017


- HM40975-11998

by: John L08/31/2016

Received Pollak 7-pole and 4-pole trailer connector sockets w/mounting bracket and wiring (HM40975-11998 this afternoon and within 45 minutes had it installed and working. Video was very helpfull. Well designed and easy to install. Thanks 289726

- HM40975-11998

by: Teasha T.08/23/2017

Perfect fit for my truck and the instructional video for installation worked like a charm! I ordered all the recommended parts to install this and it was a piece of cake! Awesome knowing I can hook up any trailer light plug to this unit! 424072

- HM40975-11998

by: RangerRick09/26/2017

Everything came in a couple days after ordering it. It installed easily and works perfectly. I pulled up a U-tube video on the 2016 Colorado to help with it's installation and that helped to make sure I wired it correctly. Good product! 436661

- HM40975-11998

by: John12/13/2016

Here you go. Worked out great! 324648

- HM40975-11998

by: John D.04/26/2017

Push it into the existing hole in the bumper and crimp the butt connectors. The Utube video on Etrailer's online page tells you what color wires connect to each other. Couldn't be any easier. Works great. 372555


Arent instruction videos great, John? Hopkins appreciates your business and taking the time to write a review!!!

Hopkins C from - 05/03/2017


- HM40975-11998

by: Chris06/22/2016

Seems to be a great product, company was VERY informative and did a great job updating me on the status and whereabouts of my order. Wiring harness that was included plugs right in to my factory harness!! 263826

- HM40975-11998

by: Shane S09/12/2013

Nice quality plug, wiring harness worked great, wires long enough to get to where I needed to splice them in. Watch the color of the backup lights, the wire color was the same as right turn in most cases. 99606

- HM40975-11998

by: Frank03/10/2017

Replaced the rusted out OEM bracket and plug from my Honda Ridgeline pickup. The bracket holes matched the Honda holes. I needed to pig tail to join to the cut Honda cable. Looks better than OEM. 351025

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Ask the Experts about this Hopkins Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?

  • Wiring Pattern for a 7-Way RV Trailer Connector on a 2001 Chevrolet Silverado Without Factory Wiring
  • To install a 7-Way wiring connector at the rear of your 2001 Chevrolet Silverado without a factory 7-Way or a factory 4-Way connector, I recommend using the 7-Pole and 4-Pole Trailer Connector Socket and wiring harness, # HM40975-11998. You can the wire most of the circuits needed to the wiring harness that is located above the spare tire along the driver side frame rail. The wiring above the spare has a yellow wire for the left turn and brakes, dark green wire for the right turn and...
    view full answer...

  • 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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  • How to Install a 7-Way and 4-Way Trailer Wiring Connector On a 1995 Ford F-350 SuperDuty
  • 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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  • Locating Brake Stoplight Signal Location on 2012 GMC Terrain
  • Use a circuit tester like part # 40376 on the wire in the # 11 terminal on the black BCM connector, as shown in the diagram I provided. The wire colors can vary during a production run, which is why we typically recommend that folks wire by function, not by wire color. As an alternate method, you can use a fuse tap like part # F2526 on the CHMSL (center high mounted stop lamp) fuse in the fuse box. The lid of the fuse box should have a legend that will tell you which fuse location is needed.
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  • 2001 Chevy Silverado 3500 Tail Lights Not Working and Brake Signal on 7-Way Not Working
  • From what I have been able to find, the 2001 Chevy Silverado 3500 had what is called a 3-wire system. This means the turn signals are separate from the brake lights. If the lights you are using are designed for a 2 wire system then it they will not function properly. There are 2 possible options. First, you can get lights that do have separate turn signal functions. Second you can use a special converter on the truck wiring to take the separate signals and combine them to a 2-wire system...
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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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  • What Wiring Harness do I Need for My 2017 Toyota Tacoma Without the Factory Tow Package?
  • The wiring harness you mentioned, part # HM40975-11998, is only designed to fit the 2015-2017 GMC Canyon and Chevrolet Colorado. To tow with your 2017 Toyota Tacoma, you will need the Tekonsha OEM Replacement Vehicle Wiring Harness with Brake Controller Adapter, part # 22117, which is a custom fit for your vehicle. Once your installation is complete, the 7-way connector will be stowed beneath your vehicle, near the trailer hitch. Mounting brackets, # 18140 and # PK12711U are sold...
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  • Wiring Instructions for Curt Harness # C55362 w/ Pollak 7-Pole Connector, part # HM40975-11998
  • The Curt T-Connector # C55362 connects to the tow wiring harness underneath your 2002 Nissan Frontier. The harness is located to the rear of the spare tire. Please refer to the photos in the instructions attached. The tow wiring connectors under your Frontier are to be separated, and the T-harness inserted between them. You will next need to secure the white ground wire to a bare metal surface with the supplied screw (or there may be an existing screw you can use for this grounding point)....
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  • Recommended 7-Way And 4-Way Wiring For 2017 Jeep Wrangler Unlimited Sport S
  • For your 2017 Jeep Wrangler Unlimited Sport S, I recommend you start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118416. The connection points for this adapter are behind the driver's side tail lights. Then you will want to use the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998 to hardwire to that 4-way. Next, you will want to use the Draw-Tite Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer...
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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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  • 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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  • Trailer Wiring Installation on 1999 Ford E450 Van
  • If you're speaking of the video showing the # 119178 being installed on a 1999 Ford Van (see link), the harness is wired into the vehicle side of the van, closer to the front of the vehicle. The vehicle being wired in the video had a 'separate' taillight system, meaning that the turn signal and brake lamp are combined on the same circuit. You can quickly tell if your vehicle has this type of system by looking at the taillights. If the turn signals use a separate amber bulb or there's an...
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  • Troubleshooting Trailer 7-Way Wiring With Constant Power on Lighting Circuit
  • Often when a trailer harness lighting circuit stays on continuously, even when the vehicle lights are okay and function correctly, the issue is corrosion inside the vehicle socket or the trailer plug that allows the 12V auxiliary power signal to bleed over to that other light circuit. On a 7-way wiring setup the 12V power circuit is carried on the pin at the 1-o-clock position as you view the socket on the vehicle. Please refer to the linked photo. Just next to this pin, at the 3-o-clock...
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  • Trailer Wiring Harness and Brake Controller Recommendation for 2012 Ford F-150 XL Truck
  • The wiring harness I recommend for your 2012 Ford F-150 XL truck is the Hopkins 4-Pole Adapter # 37185. This item will adapt the 4 pole wiring on your truck to a 7 pole round plug and a 4 pole flat. If you follow the wiring harness for your factory 4 pole, you can locate where the 4 pole plugs into another harness. In this second harness, you can strip back some of the wire loom and there you should see a blue and black (or orange) wire. You will be able to tap the blue and black wire...
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  • Replacement 7-way Trailer Connector on 2008 Toyota Tacoma With Factory Tow Package
  • The Pollak 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket # HM40975 can be mounted onto your 2008 Toyota Tacoma. If the connector on the rear of your truck is still good, and can plug into the new harness, it will work for you. If you need to hardwire in the connector because it is damaged then you can use # HM40975-11998 that includes the same 7- and 4-way with a pigtail harness.
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  • Replacing a 7-way Trailer Connector on a 2006 Chevy Silverado
  • The factory plug is located above the spare tire on your 2006 Chevy Silverado. I have included a picture of what it looks like and where it is located. You will probably have to lower the spare for easy access to the plug. The tow package wires will be bundled together in the same location as the factory plug if the factory plug is not present. There should also be a tag on the wires that lists the functions of each color wire. If there is no factory plug I would recommend using...
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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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  • Recommended Hardwiring of 7-Way Connector on a 1999 Chevy Suburban
  • Hardwiring the Hopkins 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 will work just fine for your 1999 Chevy Suburban. Some models do have the brake (blue) and hot lead (orange or red) wires already ran from under the hood to the end of the driver's side frame rail so I recommend checking into that. If they are not there, then you will want # 5506 to finish this wiring. I've attached a video of the # ETBC7 wiring that will be almost identical...
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  • 7-Way Trailer Wiring Recommendation for 2017 Chevy Colorado
  • Your 2017 Chevy Colorado might have the round socket already to allow the part # HM40975 to install without needing the wiring harness. But if you did not have the connector the part # HM40975-11998 will fit and work well. Check out the install video I attached for more info on how this installed on a similar 2016 Chevy Colorado.
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  • Installing Taillight Converter Tow Package Trailer Wiring Harness on 2000 Chevy Silverado
  • Typically, your truck would have been equipped with tow package wiring that would have already been converted. It sounds like somebody's come along and messed with that. You can begin by checking for the original tow package wiring. Look for a wiring harness that terminates in bare wires located above the spare tire or on the driver's side frame rail alongside the spare. The plug you refer to won't be there, as GM didn't start using that until the 2003 model year. If the wiring is still...
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  • Trailer Connector for 2016 Volkswagen Touareg with Factory Trailer Wiring
  • If your 2016 Volkswagen Touareg came from the factory with trailer wiring already in place then it is possible that there is a connector on that wiring to allow installation of a trailer socket. Please review the linked image of a round U.S. Car type connector. If this is what you have on the vehicle you can use part # HM40975. If instead you have bare wires, then use part # HM40975-11998 which includes the socket plus a wiring harness with connector to splice into the factory wires....
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  • 7-Way Trailer Plug Installation on 2001 Chevy Silverado 2500
  • I don't have a diagram, but I'd be happy to recommend the correct parts and match up the wire color coding for you. You could use the # PK11893 you referred to, along with the # PK11998 pigtail. Most of the tow package wiring can be found in a wiring harness above the spare tire. The yellow wire in the tow package harness connects to the red wire in the pigtail. The white ground on the tow package wire is connected to the white wire on the pigtail, the blue pigtail wire attaches to...
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  • 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...
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  • Adapter to Convert 6-Pin Flat Trailer Connector to 7-Way
  • I'm not familiar with a 6 pin flat trailer connector. What you describe might have been a proprietary connector Ford used on the F53 chassis for their factory 7-way to plug into. 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. I'd recommend you begin by using a circuit tester like part # 40376 to confirm that what you've found is indeed a trailer connector. Activate each lighting function and test...
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  • Replacement 7-Way Replacement for a 2011 Ford F-150 Raptor
  • What you will need is the Hopkins Custom Fit Vehicle Wiring # HM40975. This is confirmed to fit your 2011 Ford F-150 Raptor, and since the connector is not available without the bracket you would just need to discard the bracket or save it as a spare.
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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, # 3808, unless you already have one. For a brake controller, I recommend the Tekonsha...
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  • Comparing Hopkins Trailer Wiring Connectors with 7-Way and 4-Way Functions
  • The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End # HM40975-11998 comes with a mounting bracket so it can be installed in a number of different locations including the factory bumper location of some vehicles and 4 feet length of wire. You can use the no drill bracket # 18140 to give more mounting options. The Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector - Chevrolet/GMC # HM11141144 connects to your vehicle's bare factory...
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  • How to Isolate the Brake Light Circuit on a 2013 GMC Terrain with Combined Tail Lights
  • What you could get is a tail light converter like our part # C56196. What you would need to do is tap into the tail light wiring of your 2013 GMC Terrain and then you will have a dedicated brake light circuit for you to use. You would run the green wire of the input side of the # C56196 to the right stop turn of your vehicle. The white wire to a ground, and the yellow wire to the left stop and turn circuit. Once this is all hooked up the red wire on the output side will be a dedicated...
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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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Info for this part was:

Test Fit:
Joe V
Expert Research:
Michael L
Video by:
Andrew K
Written by:
Lindsey S
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Joshua S
Video Edited:
Jacob T
Expert Research:
John H
Expert Research:
Adam R
Video by:
Kathleen M
Video Edited:
Dustin K
Installed by:
Cole B
Expert Research:
Jeffrey L
Test Fit:
Randy B
Video by:
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Updated by:
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Updated by:
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