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Trailer Wiring Harness Installation - 2017 Chevrolet Traverse

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How to Install a Trailer Wiring Harness on a 2017 Chevrolet Traverse

Today on our 2017 Chevrolet Traverse, we're going to take a look at and also show you how to install the Tow Ready T-One Vehicle Wiring Harness with the 7-Pole Round Trailer Connector. Part number is 118271. This wiring kit's for use with tow package ready vehicles, we're going to show you how to find that plug in just a moment. It's going to plug right into our connector here, don't have to manipulate or change the wiring at all in the vehicle. It's going to send that signal around through our wiring. We've got our 7-pole plug that's going to clip right into it. This is going to give us the full array of lighting and power back to our trailer.

This gives us right turn and left turn, it's going to give us brakes, it's going to give us running lights, but it also gives us a reverse signal for marine style trailers. It's going to give a 12 volt power source if we need to power something on our trailer and it gives us a brake control wire if we do decide to put a brake controller in the vehicle, we can send that through, right back through our trailer. This is going to give us full control. The plug's very nice, you can see it's going to open slightly past 90 degrees allowing us to get our plug in. Then there's a small tab there that's going to catch and help hold our wiring in place for us. You can see they've placed a rubber gasket inside of the lid of the plug itself so when it closes down, it's going to seal that up.

That's going to help to prevent moisture, dust, and debris from entering inside, causing corrosion or moisture buildup. We're also going to have some zip ties to help us out with the installation. I typically have 2, 3, maybe 4 longer zip ties on hand. These you'd have to daisy chain together to get around our hitch but I like having those on hand. You want some side cutters, that way you can trim those off when you're done. We're going to have the relays that we'll need to put in place and the fuses that we need to put in place.

We'll show you how to do that up front, really easy, straightforward, and it's also going to be listed out right here in your instructions. This wiring is designed to fit with vehicles that are equipped with a tow prep package or with a tow package prep. To find that, to locate that, we're going to come over to the passenger side. We've got the exhaust that comes out here, we're going to tuck in right inside in between the edge and the fascia and we'll look right up on the body of the car. It's going to be located right there at the end of my screwdriver. As long as that's there, you're going to be fine to use this wiring kit.

If your vehicle's not equipped with that plug, we'd recommend using part number C56181. That's going to be a 12 volt hard wire for a full wiring kit. You'll just want to ensure that you do not have rear air conditioning. Now, we're going to take a little bit of dielectric grease and we just want to put it in our plug here. This helps to keep out moisture which can cause dirt to collect in there and eventually corrode, causing us some issues with our wiring. To help keep everything working properly, part number 11755 is a great solution. We'll place that in there and then simply plug this into our factory plug. Now, when you do this, you'll hear a little audible click and you can feel it in your fingers when it clicks. You want to give it a good pull on the plug itself, not the wiring, just to make sure that we won't have any issues with separation. Then I like to bring it around the back corner of the body, right over to the top side of my hitch. I'm going to put a little bit of tension on it, that way I won't have to worry about this wiring coming down and getting close to my exhaust. For the attachment of our plug to the rear of the vehicle, we're going to use a couple brackets here. This is part number 18140, this is a universal short bracket. This is part number PK12711U-26, this is going to be a 7-pole mounting bracket. Now, you can just run this to the back of the vehicle and zip tie it off, but this is going to give us a little bit cleaner look. What we're going to do is take our 7-way, slide it in there and line up those holes. We're going to place the provided hardware in and then we'll take the serrated lock nuts. Then we can take our nuts with the serrated washers on them, we'll thread those right onto the back. Do that at all 4 locations. If you are going to be mounting this to a bracket like we're doing here today, you just need a little flat blade screwdriver. I'm going to mount that so the shorter section is facing upward. Take the hardware provided with that to get that secure. Just like that, now we're ready to attach that to our hitch. Now, if you have a hitch that already has a bracket welded on, Draw-Tite is one that'll sometimes already have a bracket welded on, all you're going to need is the 7-pole bracket. You're not going to need the universal short bracket. We'll just pass our worm gear clamp up through and bring that up around our hitch. Then slide the other side of that bracket down through and we'll bring that hose clamp back through. Now, if we tip that bolt down, that's going to hold it in position there and allow us to use our 5/16 inch socket to tighten that up a little bit. All right, just tuck that up out of the way, it's going to give us, as you can see a nice sturdy mounting location there that'll be very easy to get to. If you open that up, close that, without any kind of issue. Now, with mounting it in this configuration, using those 2 brackets, we're still going to be able to put this rear panel on. We're going to see the wiring plug itself, but it's going to maintain that rear fascia appearance and hide that hitch. To finish up, let's bring our round plug on over. I'm going to add a little bit more dielectric grease there. Now we're going to feed that right up over the spare tire area there, bring it down, and make our connection. Once we've confirmed it's fully connected, we'll press in on the little grey keeper 00:06:54 located on this side. Now, what I like to do is just bring my excess over and one more big zip tie around there, we'll be ready to put in our relays and fuses. What we want to do is now remove the cover that's on the fuse-block here. This is going to be on the passenger side under the hood. You just need to press in on these little tabs, 1, 2, and 3, that'll allow us to remove it. Inside here, we're going to find a few areas we need to place our fuses into. We've got the F7 slot, it's going to be on this front edge right here, that needs a 10 amp fuse. We'll get that popped in. Now we'll need to move down to where we have these 3 relays, right over there, there's 2 more empty slots. One's going to be the F17 the other one, the F21, 2 more 10 amps for those. That'll be our 21 and our 17. Then we'll come all the way over to this driver's side edge, and have a relay right here, if we look behind that it'll be the F41 spot. That also needs a 10 amp red fuse. All right, now we can move on to our 30 amp fuses, we're going to have 2 of these to put in place. One needs to go here in the F30 slot, one in the F34 slot. These are going to be green, 30 amps. Now we'll get our relays put in place. This is going to go in these 2 open areas, we've got one open area here, one open area here. That's going to be the R15 and the R16. We'll turn these to where the thicker side is facing either the driver or passenger side and we'll slide those in. Now we'll take our 3rd relay, it's going to go in right over here in this slot, looks like it's going to be R1, we'll get that slid in, just like that. Now we can replace our cover. Now, with all of our fuses and relays in place, we should be able to plug in our trailer emulator here and should see this first light in the bottom left come on, indicating we've got 12 volt power. All right, that's a good sign. Now we'll go in and run through all the lights. The only signal, the one here in the middle, we're not going to get that one because we don't have a brake controller installed. If you do have a brake controller installed, you can test that, but we should see the rest of them function. All right, we'll start by turning on the running lights. Then we can do our left blinker, our right blinker, our brakes. Now we'll start the car, place our foot on the brake and try out that reverse signal. All right, now with everything working as it should, that's going to complete our installation of the Tow Ready T-One Vehicle Wiring Harness with the 7-Pole Round Trailer Connector, part number 118271 on our 2017 Chevrolet Traverse.

Info for this part was:

Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Video by:
Kathleen M
Employee Zach D
Video by:
Zach D
Employee Cole B
Installed by:
Cole B
Employee Randy B
Test Fit:
Randy B
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C

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