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Full transcript: https://www.etrailer.com/tv-install-t...
Today, we're going to be taking a look at the Tekonsha upgraded ModuLite trailer wiring kit, along with the Buyers trailer adapter on our 2014 Audi Q5. Now our Tekonsha wiring is going to provide us with the 4-way trailer connector. However, a lot of people have trailers that have a 7-way on them. And that's where our Buyers adapter going to come into play. The adapter is going to give us a 7-way. So we'll have all seven functions like our tail lights, brakes, turn signals, reverse lights, and we even have the option to put in a brake controller and have a 12 volt power source.But the nice thing is, is we still get that 4-way on the outside as well.

So we'll have a dual connector here. That way if we have two different trailers, different connectors on there, or if we just tow several different trailers, we'll be able to hook up really easily. Now I do want to mention that this is a pretty common thing. People want to be able to use a 7-way on their Audi. However, the Tekonsha wiring is meant to stay on the inside of the vehicle.

So the problem comes up to get that wiring outside, so that we can mount up the 7-way.But our Tekonsha wiring is going to be stored on the inside. The converter box and everything else is actually right behind this panel here. We just pull that panel out of the way. We can see we have our converter box and all of our signal wires hooked up. Now the converter box is going to take the signals from our factory wiring, and convert them into a working signal for our trailer.

It's also going to make sure that there's no feeding, and it's going to protect our factory wiring from any kind of potential issues that may be on the trailer end.Another thing I really like about the Tekonsha ModuLite here is that it is fuse protected. So we don't have to worry about overloading our taillight circuits or turn signal circuits from our trailer wiring, because it's going to have its own power source, that we're going to have to hook directly to the battery. And our Tekonsha wiring is going to plug directly into the back of our Buyers adapter so that way we're not going to have to worry about cutting or splicing anything on that end.That way we get all the signals coming out of our Tekonsha going through the adapter, coming out to the 7-way, and we can have it right by our hitch ready for us when we need to tow. Now I do want to mention, typically our wiring is not going to be installed in this area. Most people are going to be installing it on the hatch, because that's where the lights are.

But again, the problem arises when you want to put a 7-way on your vehicle, you have to route the 4-pole wire somehow down the hatch, down the body, and then get it out to the outside. But I found a much easier way.So if you are going to be installing a 4-way, you can still do it right here. Or if you're going to be putting a 7-way on, it's still much easier to install it this way. And we'll give you a few tips and tricks of how we got everything in place, just to make it that much easier for you. In fact, let's go ahead and do it together now.To begin our installation, we want to open up the rear hatch on our Audi. And we're going to be removing the floor coverings as well as the spare tire. So we can pull up, set this panel aside. And then we'll pull that spare tire out. Now before you go to lift it up, you want to disconnect the electrical connector here. There's two squeeze tabs on the side. We'll pull that out, and kind of just help guide it down through the wheel. So it doesn't get caught. Then you can lift up this piece separately, set it aside, then we'll grab our spare.Now right underneath this panel here is our battery. So we'll lift up on this cover. Just kind of tuck it out of the way. And we'll have these two tabs here, press away from the back and that'll give us access to our battery. Now, at this point, we need to start testing our wiring for our taillights. Now you'll notice that the taillights are on the hatch of our Audi and not on the body. And it is going to make it a little more difficult to test it because typically we would have to pull this panel down to get to the back of the connector, but I already did some checking, and I followed all the wires and they actually come down into this area right here.If we grab this panel where our 12 volt outlet is, let me just pull away. Now, you do want to be careful because that 12 volt outlet kit is on the back, so we'll just rotate it out of the way. But we have this big bundle of wire here. And we already went through and tested which wires are which. And we can go through and let you know which ones are for