Trailer Brake Controller Installation - 2016 Toyota Sienna

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How to Install a Trailer Brake Controller on a 2016 Toyota Sienna


Today, on our 2016 Toyota Sienna, we're going to be taking a look at and showing you how to install the Tekonsha Primus IQ trailer brake controller for one to three axles. We're also going to be installing, in conjunction with the brake controller, the universal brake controller wiring kit ETBC7.Here's what our brake controller looks like installed. The reason you would want a brake controller is if you're pulling a trailer with electric brakes. This is going to allow you to utilize those electric brakes and be more safe traveling down the road.This is a proportional brake controller. So what it does is, it applies your trailer brakes in proportion with how hard or soft you break. As you can see there is a C on the screen and that lets us know that we're connected to a trailer.

Also right here, this is a manual override. So you would use this in the event of like a sway or if your trailer started to get out of your control. You can hit this and apply its brakes to regain control.This does have a boost feature by hitting this button up top and you could see there's three different settings. Boost one, two and three. So this is nice because it changes your braking power depending on how heavy your load is.

So say if you had a light trailer, you would probably want to use boost one. If you're towing a heavy trailer, probably not a bad idea to go with two or three.Compared to some of the other brake controllers on the market, this one is really simplistic and easy to use. Although it may not have as many features as some of the others, it will still get the job done and work just fine. Now that we went over some of the features, let's show you how to get it installed.The first thing you're going to want to do is mount your plug to the bracket that's provided. Once you have that done, we want to secure the bracket and plug assembly to your hitch.

Once that is complete and everything's nice and tight, you can then ground your white wire, which your white wire will be your ground wire and you just want to use the supplied tech screw to ground it into a solid part of the car's frame. As you can see, I did here because it's nice and clean metal.Now the blue wire, this is going to run to your brake controller itself and the black wire, that's going to go right to your battery. The yellow wire, this will be for your reverse lights for your trailer. However, our customer requested that we don't hook this wire up.Now before running this wiring and the sheath, we did make a connection to our seven way plug. The white wiring sheath connected to the blue wire coming from the plug and the black wire and the sheath connected to the black wire coming out of the plug.Now keep in mind, this wiring, it does look like it's just dangling here, but it is secure and there's also a cover that will come up and keep all this area protected.

We just have it removed so you can get a better idea of what it looks like.If you want to follow me, I'll show you how I ran the wiring. Just down across through here, up here. It's a good idea to stay away from any hot or moving parts. Just ran it along through here. Dropped out down here and then just up along the inside of the frame and I ran it underneath this cover and up until the engine compartment.Now I actually used a fish wire to pull that wire up into the engine compartment. All that is, is a piece of airline tubing or you can even use a coat hanger, whatever you might have handy and you just drop that down from the top. It'll hang down here. That way when you get to this point, you simply just tape your wire to it and then you can go up top and pull it up and it'll come out through the engine compartment.So here is where our wire came up into the engine compartment. I actually cut that sheath off so I had some room to work with these wires. The white one will run inside of the cab to the brake controller. The black one is ran over here to this 40 amp breaker and I put it on the silver post.On the other end of the post, the gold post, we took the leftover wire and ran it down and along through here to the positive side of the battery terminal. This is a manufacturer's original grommet and that's where we ran our wires through to get inside the cab. I used to fish wire technique, like I mentioned earlier, except I just put the fish wire from the cab out through that grommet, connected my wires to it under the engine bay and pulled them through.Now through that grommet, there will be two more additional wires that will run out through there. Those will come from the brake controller. Those wires to the brake controller is going to go to power and ground sources, which I'll show you where I hooked those up now.Now those two wires that came from the brake controller, one of them went to the ground on the battery. That's this white wire. So this actually goes inside to the brake controller. The other one, we actually ran over to here. Now this is a 20 amp breaker. We ran it to the silver post on the breaker and then, we used the leftover wire, put a ring terminal on it, connected it to the gold post on the breaker and ran that along through here and up to power from the battery as well.So now we come down here to the driver's side floorboard. Now we do need to find a brake signal for our brake controller. So right here to the left side of the brake pedal, there'll be a plug with some wires coming out of it. The thin, blue wire, you will need to tap into that to acquire that said brake signal and that's exactly what I did here.I used a red wire to tap into the thin, blue brake signal wire and this red wire will simply run over to the brake controller and we'll connect this wire to the red wire from the brake controller.In case you're wondering how I figured out that this blue wire's a brake signal. The wire will only have power when you depress the brake pedal. So what I did was, I took the test light and connected to each one of these wires and hit the brake pedal. Whenever there was no power to this and I applied the brake pedal and it powered up, I knew that blue wire was the break, signal.All right. So now we just need to hook all our wires up to the brake controller itself. The red wire we'll put to be brake signal. The black wire will hook to the black wire that we ran through the dash. The white one is a ground. So we will hook that to the white wire that we put on the negative battery terminal and the blue wire, you will hook to the white. The single white wire that we ran through the dash that came all the way from outback at the seven way plug.After that, you're going to want to go ahead and secure all your wiring up under the dash. Then you can focus on mounting your brake controller. We use screws included with the kit. Just want to find a good open area like this area here. You do want to make sure to get your brake controller as level as possible.Now that it's mounted, you can just simply plug it into your brake controller and then we're going to go ahead and make sure it has power and everything is working properly. inaudible 00:08:35 in the installation of the Tekonsha Primus IQ trailer brake controller on our 2016 Toyota Sienna.


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Test Fit:
Joe V
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Zack K
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Andrew K
Installed by:
Jeff D
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Joshua S
Test Fit:
Nicholas E
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Jacob T
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Andrew L
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Kathleen M
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Mike H
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Dustin K
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Cole B
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Shane T
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Alan C
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Sue W
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Randy B
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Chris R
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Robert C

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