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Trailer Brake Controller Installation - 2011 Subaru Outback Wagon

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How to Install a Trailer Brake Controller on a 2011 Subaru Outback Wagon


All right, today in this 2011 Subaru Outback Wagon, we are going to install a brake controller, part number 90195. We are also going to use a couple of other part numbers, ETBC7, to help install our brake controller and also part number 18136, in Tow Ready; this is a universal mounting bracket. We are going to start off our install using that bracket. Now our mounting bracket just clamps on to the hitch; put the bracket up to the hitch, bring the clamp around and then go ahead and secure it. We will go ahead and move the clamp and set in to place in a way we have less of the extra hanging down. Now we will go ahead and install the 7 pole bracket.

Then we can go ahead and install our 7 pole connector on top of that. We will go ahead and tape up the wires coming from the 7 pole connector to keep them all together and then we will go ahead and check the 4 pole off the 7 pole connecter up to the previously installed 4 pole connecter on the car. We will use some dielectric grease to help protect the contacts and then we will tape it up to make a semi permanent connection. We will take a grey cable and we will go ahead and connect it to the two wires coming off the 7 pole connecter with the yellow inaudible 01:28 connecters. We will attach black to black and white to blue.

Now our white wire will eventually go back to blue, going back to our brake controller. Ok, then we will take our purple wire and our white wire and run it along our grey cable and we will go ahead and ground the white wire. Our purple wire will be reversed slightly and will not be used. With the grey cable connected, we will go ahead and start running it towards the front of the car and up to the battery. We will also be using some of the loom material and comes with the ETBC7 kit, to help clean up the look of the wires as well.

After we have run the wire past the rear suspension, we will go ahead and pass it through the panel, underneath the car to help hold it up and then the rest of the way up, going towards the front, we will be using some loom clamps, part number A0500. Then our next wire to be run will be for the brake signal. Now it is very hard to get underneath the dash to find a brake signal so we are actually going to use an input for our tow package in the back of the vehicle and we will go ahead to tap in to that and then we will run up towards the front and eventually inside the cabin. To get a brake signal, we will go ahead and connect in to the red wire going in to the previously installed convertor box, for the 4 pole wiring harness. To run a wire for our brake signal, we are just using some 14 gauge red primary wire. Now also, to help protect the wire on the inside of the trunk, we will also be using some loom material, part number 459075-1.

Then well just take our wire and just run it up to the front, along the side of our grey wire we ran previously. We will leave the red wire alone for now and get back to working with the grey cable. When working on our grey cable, we are going to go ahead and split the cable in half. We will remove the sheath and black wire will be ran up to the battery. We will also leave enough length left over to run it through our circuit breaker as well. To make things a little easier to install our circuit breaker, we are going to go ahead and temporarily remove the battery. Once our circuit breakers are installed, we will go ahead and take our black wire through the circuit breaker; we are going to run it to the silver post first. Then our other half of our wire will go through the copper post and on up to the battery. Now this wire is for a 12 pole power supply going out the back to the 7 pole connector and our white wire will eventually go to our blue wire on our brake controller. So now we also need our circuit breaker for our brake controller and we are going to install the 20 amp circuit breaker right next to it. Once our circuit breakers are installed, we will go ahead and take our excess wire that we had from before, still in the grey cable and we will go ahead and route that through the circuit breaker and to the battery. The black wire will go through the 20 amp circuit breaker and up to the battery and our white wire will peel back and use a factory ground that is closer to the firewall. We will use a larger ring terminal for the ground too. At this point we will have all the wires we need to run up to the brake controller. We will go ahead and tape up the wires and then we can go ahead and pull back the grommet out of the fire wall and make a slit in it and then run all the wires through. We will run the red wire for our brake signal, a single white wire for our brake output and then the grey cable for our power and ground for our brake control. Then we will push it in to the cabin and reinstall the grommet. At this point we can go ahead and connect the wires up to the harness that comes with the brake controller. We will hook up our single white wire first to the blue wire. Then we will connect our red wire to red and our black to black and white to white. At this point we will go ahead and tape up the wires. Once the wire connectors are made we will go ahead and mount the bracket for our brake controller. We will go ahead and hole the dash and make sure we have room to work around it and we will make a small mark for us to line up with it. We will put the brake controller down, put the bracket up into place, line up the mark and install in the screws. At this point we will go ahead and make sure the brackets are level and then we install the other screw and then we can go ahead and install the brake controller to the bracket and add two machine screws for that purpose. The wire harness is plugged into the brake controller and that is mounted to the dashboard. Now we will go ahead and take some zip ties and secure the wires to make sure they are safe and out of the way. All right, now we will go back underneath the hood and reinstall our battery and we will make our final two wire connections to the positive side of the battery. With the battery reinstalled, we will go ahead and check power at our brake controller. It will show the title screen there, so we know we have got power to the brake control. Now we will go ahead and test our brake pedal and we should have an indicator that says in red that a trailer is not hooked up. All right, we will try the manual override and does the same thing. Now I will test with a trailer hooked up. You will see on the screen there is a small icon of a truck and trailer, so now we have a connection. We will hit the foot brake and we will see the number go up a little bit. Now we will go ahead and try to manual override and we can see how it goes through a full range of numbers. So looks like everything is working. All right, with that that will finish it for the installation of the part number 90195, the Tekonsha Prodigy P3 Brake Controller on our 2011 Subaru Outback Wagon. .


Questions and Comments about this Video

Scott L.

@ 2:15 he discusses taping into the converter box in the back to connect to the brake signal cable on the brake controller. He mentions its the red wire but the Curt Wiring Harness Item # C56040 has 2 red wires. Which one? The one grouped with the others or the one with the fuse? Thank you!

Etrailer Expert
Reply from Rachael H.

It is the red wire that goes from the white plug to the converter box. The red wire without a fuse holder.

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