Installation: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 2018 Toyota RAV4

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Full transcript: https://www.etrailer.com/tv-install-t...
Speaker 1: Today on this 2018 Toyota RAV4 we'll be having a look at and showing how to install the Tekonsha T-One vehicle wiring harness with a four-pole flat trailer connector, part number 118578. Here's what our wiring looks like installed. As you can see, when it's not in use we can easily store it in our spare tire compartment. When we want to use it, we can just take the wire out. We'll drape it over our rear bumper here, making sure we don't pinch it in our latch, and we can close our hatch.As you'll notice, our wire is long enough to easily reach down next to the receiver on our hitch. This makes it easy for us to hook up to our trailer.

Now the reason you're going to want a wiring harness such as this one is so you can safely and legally tow your trailer. You'll have all the necessary lighting functions that are required by law in order to do so. This green wire here provides your right turn signal and right brake light. The yellow wire provides your left turn signal and left brake light. The brown wire provides your taillight and running light signal.

This white wire here provides the necessary ground connection between your RAV4 and your trailer in order for the lights to work properly.One thing that I really like about this wiring harness is that it does have a separate module box, which isolates your RAV4's expensive lighting components and electrical circuitry from any potential short circuits that may occur in your trailer from damaging the vehicle. We have a nice dust cover that's built in to protect our connector when it's not in use.Now this wiring harness provides five amps of power output per side for our turn signals and brake lights, which is more than sufficient to tow a small trailer with a few incandescent light bulbs or several LED light bulbs because they do draw less power. On our taillight circuit on this brown wire, we have a total power output of seven and a half amps. We could run several incandescent light bulbs for running lights and taillights without an issue and basically as many LED as we want.Now one thing that our customers really like about this wiring is how they can store it inside their vehicle when it's not in use and it's out of the way and protected from the elements. Others have said that they really like how it's plug and play and they don't have to splice any wires on their vehicle at all.

Just goes right inline with their factory taillight connectors, which won't void the warranty on your vehicle when you're installing this.Now that we've gone over some features, we'll show you how to get it installed. To begin our install, we'll start by opening our rear hatch. Now we'll start by removing all of our floor coverings, including our spare tire. Now we can get these side panels out here. The way it's attached on the driver side, we have two plastic push pin fasteners to remove.

Use a trim panel to go underneath it and pry up and it'll come out. Now we can lift up on the entire panel and set it. Now we can remove our threshold. The way this comes out, you just lift up on it and release it from the clips underneath. We'll remove the styrofoam that our spare tire rests in as well.We're looking at our driver side interior panel, the lower panel. We have a Phillips screw right here and we have a 10mm bolt here that holds our cargo tie down point in place. We want to remove both of these fasteners. Now we're going to pull back on our interior panel here to gain access to our wiring behind it. Use my trim panel tool to help pry away on the side of the vehicle.Now that we have our panel loose at the back, we have a couple more fasteners to remove so we can get it further loose closer to the front. We'll have a 10mm fastener here that we'll remove. At this forward cargo point we'll fold it down, fold down the cover. We'll find a 14mm fastener that we have to remove. We also found there's one more fastener behind this plastic plug here. We'll use a small flat head screwdriver, pry the cover open. Inside we'll find a 10mm fastener. With that fastener out, we can now pull our panel apart enough so we can pull this panel loose now. I'll pry behind it.Behind the white panel, near the bottom of it, we find this white connector here. That is for our driver side taillight. We're going to unclip that connector now and bring it out so it's easier to work with. Now on the connector there's this tab. Press in