Hopkins Trailer Wiring Harness Installation - 2020 Chevrolet Silverado 3500

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How to Install the Hopkins Trailer Wiring Harness on a 2020 Chevrolet Silverado 3500


Connor: Hey, guys. This is Connor here at etrailer.com. Today, we're going to be taking a look at the seven and four pole trailer connector here for our 2020 Chevy Silverado 3500.So this trailer connector here, it's going to be an excellent option for our Chevy 3500 here. If your truck didn't come with the factory prep package and you need to tow a fifth wheel or gooseneck trailer, chances are you're going to need an in-bed wiring harness. So if you don't have that, you are going to want to pick this up when you get your fifth wheel or gooseneck hitch.So this is going to be the factory-style plug that's installed in the rear bumper, as well. It's actually going to have two different types of connection points, one up here for our four-pole trailer connector.

However, you probably won't be using that with your fifth wheel or gooseneck trailers. More than likely, you're going to be using this bottom one here, which is the seven-way. It has all the RV standard functions you're going to need for your fifth wheel or gooseneck trailer.Now, some trailer connectors, they will reach to seven-way at the rear bumper. However, it makes things a lot easier. You don't have to worry about binding when during turns.

We have a trailer connector here in the bed, which is why this is going to be a great addition to your towing setup.So a couple of things I really like here, aside from the factory style, is it has a nice secure fit here. We are already going to have these two spring-loaded doors here. They're going to close automatically. It also has molding inside, so you don't have to worry about any rust, corrosion, water getting in here and creating any trailer lighting issues.So in regards to installation, this is definitely going to be something super simple that you could do at home. We don't need any special tools or anything, and everything that we need for installation is actually going to come with the kit.

We do have to splice a few wires, but everything's already labeled for us, so it's really simple and straightforward. The rest of it just involves running the connector into the bed and simply snapping the new one in place. And that's it; you're done. I definitely encourage you to do this at home by yourself to save you some money.So the first step of our installation here, we need to find the ends of our wiring harness that are going to go to our in-bed wiring, and on this truck, it's pretty easy. It's going to be behind the driver's-side wheel well here, behind the bumper, as well.

It's going to be a set of colored wires which are easily marked and labeled.So now once we have our wiring harness located, we're going to go ahead and attach each of these one by one to the harness that came with our kit. Now, keep in mind, we may not be able to attach color by color. We need to attach function by function, but the functions are all going to be labeled here on this tag, as well as the instructions that come with our kit here. So we're going to first start off by making the connection for our trailer brake wire, which is this blue one right here. So we're going to cut the plug off here and splice it into our wiring harness here, using the included butt connectors.We're going to go ahead and repeat the same process for these other wires here, and don't forget when we're done, we're going to come back and we're going to use some electrical tape to tape off all these connections. Or if you want, we sell heat shrink butt connectors here at etrailer that you can purchase with your harness.So now that we have everything connected, before we go ahead and tape up our wires and we run our trailer connector into the bed, we're just going to go ahead and install this on the end like so. That way, we can test our wiring. Now, if you have a trailer nearby, that's obviously going to be easiest for you guys at home, but we actually have a trailer connector here specifically for this. So we're going to go ahead and test everything out to make sure it's working.We're going to apply the brakes to make sure those are good. We're going to do the right-hand turn, the left-hand turn, the running lights, and then last but not least, our trailer brake. So there we go. Everything's working. Now we can proceed on to mounting the trailer connector in the bed.So now it's going to be time to install our trailer connector. Now, we're actually going to have a dummy plug inside the vehicle. We'll show you what the outside of that looks like in a second, but in order to remove it, you're going to have to come underneath the truck here. And it's going to be really hard to show you this, but it is pretty easy to get to and remove. We're just going to stick our arm up here, behind the tail light sort of body here, and feel up there. You may need to look around first, but it would be looking for that dummy plug. There should be a pretty good hole to see it. And then basically, what we're going to do is we're just going to squeeze the two sides of it to get it to pop free.We're ready to install a trailer connector in the truck bed, but as we mentioned earlier, we need to protect these wires. We're going to be coming back here with some electrical tape. If you have and you use the heat shrink butt connectors, that's when we're going to seal these up with a heat gun at this time.Now that we have our wires sealed up, we're going to take the pigtail end of our trailer connector. We're going to feed that up through that hole in the bed that we removed from the dummy plug. We're definitely going to have some extra wire hanging down once we get the plug up there, so at this time, we're just going to take some zip ties and we're going to tie this to some of our factory wiring, so it doesn't hang down, drag the ground, and get damaged.So last but not least, we're going to go ahead now and install our trailer connector. Before we do so, I'm going to take some dielectric grease. I'm going to put them on the pins inside here, just to keep from any rust or corrosion issues.Then we can line up the locking tab here. Should hear a click, and we can just press this to lock it in place, and then we're good to go. Just like that. Finally, we're going to take some more dielectric grease here. We're just going to coat the pins inside of the trailer connector. Again, just to prevent any rust or corrosion issues.And that's going to do it here today for our look and installation of the seven and four pole trailer connector here for our 2020 Chevy Silverado 3500.


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