/
Hopkins/
Custom Fit/
Trailer Hitch Wiring/
4 Flat/
7 BladeItem # HM40975-11998
Retail:$64.40
Our Price: $50.54
You Save: 22%To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
This item qualifies for Free Shipping
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:
Specs:
Wiring Configuration
| Wire Color | Circuit | Wire Gauge |
|---|---|---|
| Red | Left turn and stop | 14 Gauge |
| White | Ground | 10 Gauge |
| Blue | Electric brakes | 12 Gauge |
| Green | Right turn and stop | 14 Gauge |
| Black | Battery | 12 Gauge |
| Brown | Running lights | 14 Gauge |
| Yellow | Reverse lights | 14 Gauge |
Installation Details 
Alternate Instructions
2015 - 2020 GMC Canyon without factory 7-Way
2015 - 2020 Chevrolet Colorado without factory 7-Way
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.
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.
Average Customer Rating: 4.8 out of 5 stars (257 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.Great plug just right for what I wanted to do 634574
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
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 - 07/23/2017I 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
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
Installation installation and wire color coding information is provided and linked above in the product description.
--
Mike L - 07/17/2019
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
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
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
Does what it says ... says what it does. The install video was a big help too. 573100
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
Easy installation! Kit only supplied 6 connectors when there were 7 wires ...... oops! 362344
Steve, the 6 connectors are correct. The ring connector that attaches to the ground wire is the 7th connector.
-- Laura E - 01/24/2018I still like the wiring harness I purchased from your company last year. Thank you for asking.
Steve B - 04/04/2018Excellent 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
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
Bought this trailer connector to use instead of the flat 4 wire connector. Wanted a nice finished look on the rear of the vehicle without any hanging wires. Mounts to the Draw Tite mounting bracket without any modification. Only minor problem I had was with the wiring. The wire colors are not the same between the 4 and 7 pole connector. A call to etrailer got the problem resolved. Great customer service! 517709
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
Everything fit perfect, just follow the color matching in the video. 729828
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
The trailer connector is great, it fits perfectly into the bumper, and looks great. I am having trouble on the vehicle side of the wiring. I cannot get power on the brown wire for the tail light portion. 720441
Easy to install and works great. 719704
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
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.
$10.76 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 - 10/21/2019Great on line service 711635
Fit my 2018 Colorado nicely. One year later and no rusting. 715111
great look with the powder coat fit well on 2017 gmc van. 714804
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
Easy installation. Sleek and simple design. A great controller at a great price provided by an excellent product outlet. Thanks etrailer.com for caring about your customers. 699541
Great quality quick delivery excellent how to videos on installation already order more parts from them. 686787
Just what I needed and fit perfectly!! Highly recommend this product 686556
everything as advertised 680962
Haven't installed the product yet but the customer service was amazing! Will be purchasing from them again. 680668
The item itself was fine, but would have been much easier to install had there been instructions with it. 670281
Great 668662
Quality product easy install very satis fied 661619
Staff on the phone was super helpful confirming whether this would be the right product. Overnight shipping was incredibly fast. Item arrived before noon the next day. 645199
I purchased this kit after watching the tutorial YouTube video. The video was really informative and helped alot. Great customer service as well! 642409
Easy to install thanks to the video. Good quality product. 639826
Quality product delivered as promised. 639456
Replaced my factory mount on 2012 Ford F250. This one is much better. 638586
Perfect ! Great kit to wire in a 7 wire connector if you don’t have one! Just finished installing on 94 ford bronco. Very simple 636379
Nice vehicle plug with weather-proof covers and a mounting bracket. 636220
Have not yet installed, but looks like a sturdy, well built trailer connector. Have seen others installed and decided it as a must-have item. 636155
Great 635721
Very pleased with this product. The connector snapped right into place on my Colorado and the installation video was great help! Had it done in no time and plugged in the trailer and all lights worked perfect. Thanks! 628029
Great product....directions were easy to understand. I will definitely use this company again. 625269
Excellent quality product and service. Always have the exact part I need. I only order from etrailer. 614537
I love the setup of the 7way and 4 way connector in 1. The wiring was a little tricky since i was hard wiring it directly into factory gm wiring and only a few wire colors matched, but with a few Google searches i figured it out. Works wonderfully! 612777
Worked perfectly ! Really appreciated the installation video ... took away any guesswork. 612672
Easiest trailer light hookup ever! All the wiring was in place with my 2018 Colorado. Followed the video to get the wires right. No need to get into the tail lights. A little pricey but well worth it. Used the heat shrink product as shown in the video. 612362
The mounting bracket and wiring was exactly what I needed to fix my broken one. Quick shipping also. 609388
Product is exactly as described and easy to install. Factory fit for my 2017 canyon. Quick delivery as well. Couldn't get my order to go through online so I had to call and had great customer service. 606824
Great item 603898
Ask the Experts about this Hopkins Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?
Do you have a question about this Custom Fit Vehicle Wiring?
At etrailer.com we guarantee:
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Helpful Link
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.