Hopkins Endurance 5th Wheel 90-Degree Wiring Harness Installation - 2020 Chevrolet Silverado 3500

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How to Install the Hopkins Endurance 5th Wheel 90-Degree Wiring Harness on a 2020 Chevrolet Silvera


Connor: Connor here today at etrailer.com. We're going to be taking a look at the Hopkins Endurance 5th Wheel/Gooseneck trailer wiring harness here for our 2020 Chevy Silverado 3500. So this is what our trailer wiring harness is going to look like installed. It's going to be the perfect match for this vehicle here, because it has the same size dummy plug that we're going to. The trailer connector is going to be the same size as the dummy plug that we need to remove. Therefore, this is the exact OEM trailer connector that's designed for this cutout here.

Now, you do have some other options, but they're going to be the square rectangular connector that you'd have to actually drill another hole into the truck bed in order to be able to use. This is the only one here that's going to fit snugly inside this cutout from the factory here.So with our in-bed wiring harness here, it's actually going to provide us with two connection points. More often than not, you're going to be using the 7-way trailer connector here, because this is mainly for using Gooseneck and 5th Wheel lights and wiring. That way you don't have to run an electrical cord over the bumper into the 7-way inside the bumper. You can also have issues with those coming unplugged in tight turns, so it's a good idea if you're going to be towing a 5th Wheel or Gooseneck trailer to go ahead and install one of these in-bed wiring harnesses.

We also up here have a 4-way trailer connector. Now the 4-way trailer connector probably won't be used as much, but if you have any accessories such as a tailgate light bar that are 4-way powered, you could definitely just splice or you could definitely just use this connector here to power those accessories.So in regards to installation, this is definitely going to be one you're going to want to do by yourself at home. You don't need any tools for this whatsoever, and you really don't need any knowledge to install this. It's going to feature a simple plug and play installation that really anyone can do by themselves. So now that we've talked about the features a little bit, let's go ahead and show you how easy that install is.

So if we come inside our truck bed here and we look over on the driver's side, directly below or directly behind our tail lamp here, we're going to see this black box here. And essentially what this is is this is just a plug here that we're going to replace with our trailer connector for our in-bed wiring.In order to remove this, we actually going to have to come up underneath the truck and we're going to have to sort of sneak our arm behind. There's going to be a little pocket right in here. We're going to have to sneak our arm and reach up there. And there's going to be two tabs on the back of it, which we'll be able to give you a better view of once we get it out.

But all we need to do is depress those tabs and this should pop out. So let's go ahead and get under the truck. We'll do our best to show you it. So we're under the truck here. And as we mentioned, there's going to be a little pocket up in this area here, which is behind our quarter panel and behind our taillight. It's just a couple inches up in this pocket here. All we need to do is reach up there, and as I said, we're going to use our fingers to sort of pinch the two tabs in and push it out.So here we have our dummy plug. And as I mentioned, there's going be two tabs here. It's actually a piece of black paint on each of those. All we do is depress it and once you depress it, it should pop right out. It's super simple. You just have to get a good grip on those two tabs there. So now what we're going to do is we're going to take our harness. We're going to have two different ends to our harness. As you can see, we have the two connectors here and the singular connector here. The singular connector, we're going to reach down in that pocket and we're going to fish it up and try to get it to come out our hole here.So now that we have our connector routed out through our hole here, we're going to go ahead and make our connection here to the back of our trailer connector, which comes with our kit. You're going to see a square portion of the tab here. That's going to align with the tab on our trailer connector. We should hear an audible click when they're locked together securely. I'm just give a good little tug there to make sure it did seat. Now, what we can do is we can go ahead and mount our trailer connector through our opening here. May need to rotate it a little bit to get the plug to fit, but it should snap in place just like our dummy plug.So now we're going to go back underneath the truck here. We're going to make our final connection and secure our wires. So it's going to be super easy to find the plug we need to access to splice this in. Basically, it's going to install in line with our existing 7-way. So if we take a look at our rear bumper here, we're going to have the factory 7-way. All we need to do is we need to look directly behind this, on the other side of the bumper, to reveal the connector that we're going to splice this into.So here is actually the connector. It's the backside of that connector we just showed you. And at the top here, you're going to have this gray tab, which is sort of a locking mechanism. Just going to take our fingers here on both sides and we're just going to pull straight out. It's not going to move much, but that's going to release the locking mechanism. Then we're going to take our other two fingers here, and there's going to be a little button here, sort of you should be able to feel it a little bit once you release that locking tab. And then once we depress that, we should be able to pull the connector out away, just like that.So now we can take the other end of our harness here, and you really can't mess this up, because it's only going to install one way. I'm going to take the long end here, plug that in. We should hear a click. You may not be able to hear it on camera, but you should be able to hear this at home. And then we're just going to take this other piece here, just plug that right back into the back of the trailer connector. And now we're just going to take some zip ties here. We're going to sort of coil the remaining wiring harness that we have. We obviously don't want it dragging the ground. We're just going to take some zip ties and we're going to tie it up here to secure it in place so we don't have to worry about it dangling down.So the final two things we're going to do here. Number one, we are going to start by applying some dielectric grease here on both the terminals of the 4-way and the 7-way. And the reason we're doing this is it's going to ensure that if any water does get in there, which it shouldn't, because we have these watertight doors, bu if any water does get in there, it's not going to corrode our pins and create any inaudible 00:06:22 issues. So we're just going to take this now, just liberally apply them on both the 4- and 7-way. So keep in mind this dielectric grease here isn't actually going to be included with your kit. You can pick some up. This isn't a required step, but it's just good practice.Now, we're going to go ahead and turn our truck on, and we're going to test our outlet here. We're going to be using a little tester box we have here at etrailer. At home, I'd advise you just to use your trailer. You don't really want to use the plugin LED testers for this, because they more often than not create issues here with the factory trailer wiring circuits on these newer trucks. So let's go ahead and use our tester box here to test everything out. We have the brakes. Left turn. Right turn. And then finally our taillights.And that's going to do it today for our look and installation of the Hopkins Endurance 5th Wheel/Gooseneck trailer wiring harness here for our 2020 Chevy Silverado 3500.


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Info for this part was:

Video Edited:
Chris R
Video by:
Jonathan Y
Test Fit:
Conner L

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