Trailer Brake Controller Installation - 2009 Cadillac Escalade

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How to Install a Trailer Brake Controller on a 2009 Cadillac Escalade


Today, on our 2009 Cadillac Escalade, we're going to take a look at and show you how to install the Tekonsha Primus IQ trailer brake controller. This is good for 1, up to 3 axles. Its part number is TK90160. The Primus IQ's a proportional brake controller. It's designed for use with up to 3 axles, and has a lot of great features that really can come in handy. First, we've got an easy to use dial adjustment here.

I'll show you. We're able to set the braking power that's going to be sent back to our trailer. Depending on the size of the trailer, a heavier trailer, we're going to need more power. The lighter the trailer gets, the less power that it will need. We've also got a manual override right here, so if we need to hit the brakes in just the trailer, all we have to do is press our level over, and it's going to take it right up to whatever our maximum setting is.

It also offers a boost button right here on top. As you can see, a B with nothing besides it means that we don't have boosts set. We've got B1, B2, and B3. This will set the aggressiveness of our brake application for a split second, then it's going to run up to whatever setting it needs to for the application. Since this is proportional, it's going to use a sensor inside, and it's going to match our vehicle's braking. If we're just lightly hitting the brakes, this is going to lightly apply the brakes to our trailer.

If we get in an emergency braking situation, and we really need to stop quickly, it's going to do that for us, too. It's going to recognize that we've really hammered on those brakes, and it's going to send the required amount of power to the rear to get everything stopped. We need to begin our installation by finding our factory wiring, that's going to exist underneath the dashboard. Here we've got our onboard diagnostic port. We're going to back from that about 4", just about to the very front of our parking brake here.

There's going to be a wiring harness that runs right behind this little tab. There's a piece of tape that's holding it on, and it's got this piece of white paper on it. That indicates what needs to be connected where. We want to be careful, and just lightly trim that tape, then pull down our harness. We can see we've got a red with black, a dark blue, a white, and then a light blue with white. Let's pull off our tag here as well. You'll see on here it's going to tell us what we need to connect where. We need to look at our brake controller instructions. It's also going to have instructions for what wire goes to what. We'll start with our ground here. We'll strip this off. Use one of the smaller butt connectors provided with our brake controller. Just go through and we'll add our connectors to each one of our wires here. Get a little bit more. The two small wires get the blue butt connectors, the two larger ones are going to get the yellow. Now we'll bring in the pig-tail that's going to come with the brake controller, and we'll use the diagram that we got here, and we'll use the list that we got here, and we're going to match that with the list that's in our instructions, and start hooking up our wires. Our white wire's going to go to the white wire. Our black wire's going to be our battery wire, that goes to the red and black. Our red wire's going to go to our stoplight wire, which is going to be the light blue and white. Finally, our darker blue wire . That's going to be connected to the darker blue wire from our pig-tail. Let's take a second, just to kind of tape this all up, make it look a little bit nicer. With that wrapped up, that will give us a nice, clean wiring look so we don't have 4 separate wires kind of hanging out. We're just going to set that aside and let's get our brake controller put in. Now we can mount our brake controller. We can pick really any spot here on or under the dash that we like. I like to use this small screw that's right here. There's already a hole there that goes into a metal bracket. It's going to give us a lot of support. You can mount it up here on the dash if you want, as long as you stay here in our angle limitations on it. The one area I would avoid would be over here on this left side. You might bump your knee when you're getting in and out of the car. Just anywhere over on this side should be fine, or right down here where we're going to go. We can slide our bracket in right behind there. Place in our screw. Just tighten it down. It's not a bad idea to put one of the self-tapping screws in. It's going to be provided. Just for a little side-to-side support. As you can see there, now it won't move or turn. It's a great mounting location. Now we'll take our pig-tail, plug it right into the back of the controller, make sure it's got a good secure fit, then we'll align the 2 holes that we have on each side, with either the lower set, which will offer a little bit of adjustment, or the upper set there, that will be a little more fixed. We'll get our screws added in here. Once we have them all started, we'll secure them on in. All right, now we'll get our excess pig-tail gathered up. Use a zip tie right around the floor heater vent here. Gather it up nice and tidy. Then we can just cinch it down. Trim off our zip tie. Now we can head under the hood and hook up our two wires. Now let's pull the cover off of our fuse block here. We'll see two studs sticking up here. One here, and one here. Now we need to connect one of our wires that's hanging out right down here, and as you can see it just underneath that wiring cluster there, that red one with the black stripe. Pull that one up here as well. The wire that we've got down here on that cluster, it's going to go to the smaller stud. The wire that's over here on this main harness is going to go to the larger stud. We will need a couple of nuts to help hold these on. To access them, we'll just pull out on the small tab, and up on the gray lever. We'll bring our wires in, place our nuts on, and . The other one we're hooking up, that's going to be power back to the trailer connector. Since we're here, we might as well get them both taken care of. We can put our cover back on, after we kind of bend those down. You see our little red light That's going to indicate that we've got the power we need. I'm going to head back and get our trailer connected, and make sure it comes up. We've got the C, that indicates we've got our trailer connected. In the event of a disconnect, you can see it's going to flash NC, NC, NC, indicating that we've had a disconnect situation. We need to pull over and get that resolved. With everything working as it should, that's going to complete today's installation of the Tekonsha Primus IQ proportional brake controller, part number TK90160, on our 2009 Cadillac Escalade.


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