Trailer Brake Controller Installation - 2005 Chevrolet Colorado

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How to Install a Trailer Brake Controller on a 2005 Chevrolet Colorado


Today on our 2005 Chevy Colorado, we'll be installing the Takonsha Primus IQ trailer brake controller, part number TK90160. With this brake controller, we will be using the universal 7-pin wiring kit, part number ETBC7. We'll start at the rear of the vehicle. On this particular vehicle, there was already a 4-way trailer connector installed. We will begin by finding a location to mount he 7-way and 4-way trailer connector. On this particular, we we're able to mount the bracket just under the bumper edge. To mount the 7- and 4-way trailer connector bracket to the bumper, we used 2 self-tapping screws. To make things easier, we will go ahead and make some of our wire connections on the table before we install the 7- and 4-way trailer connector up on the vehicle.

This part of the ETBC7 kit, a long section of wire is included. This will need to be connected to the black and the blue wire coming out of the back of the 7- and 4-way trailer connector. The black connects to black, and on this particular instance, the white will connect to the blue. In this particular installation, we will not be using the purple wire. The wires will be connected using butt connectors and crimped. Now, we will go ahead and tape up the wire harness with some electrical tape leaving a small section of the 4-way pigtail hanging out so that we can connect it to the 4-way that is already installed on the vehicle.

Now that all of our wire connections have been made, let's go ahead and slip the connector into the bracket that we mounted to the bumper brace. We will use 4 screws and nuts to connect the 4-way and 7-way connector to the bracket. Now, we're ready to connect the 4-way with the vehicle's 4-way. Here, you might want to add a little bit of dielectric grease, part number 11755. Once you have the 4-way pushed together, it's a good idea to go ahead and put a zip tie around them to help hold them in place as well as wrap them in electrical tape. Once you have the wires taped up, the kit comes with a protective wire loom that you'll want to slide over the wires and again, put some electrical tape around it to help hold it in place.

This will give the wires a little extra protection when you feed them up under the trailer hitch in the bumper area. Once the connector is attached to the brace, now, we will need to go ahead and use another self-tapping screw and attach our ground wire. Now, we will go ahead and run our 2 wires in a protective casing, and we need to run that to the front of the vehicle. You need to make sure that as you're routing this wire that you keep it away from any sharp edges or hot areas such as a muffler, exhaust, or any areas where it become pinched. To secure the wires, we use zip ties. Once you've run the wire to the front of the vehicle, go ahead and zip tie the extra wiring to the 4-way as well as where the plug is.

To help clean up the installation, it's good to use a pair of side cutters to snip off the excess of the zip tie once you've snugged them firmly. Now that the wire has been pulled up into the engine compartment, you want to look for where the wire harness goes through into the cab of the vehicle. At this point, we will need to make a small slit into the big rubber grommet. Before you cut any of the length of this wire, you'll want to pre-measure about how much wire you're going to need to make it over to your brake controller as well as the battery connection. Now, we'll go ahead and mount the circuit breaker. In this case, we're going to mount one on either side of where the battery is located on this vehicle on the inside fender area. Again, we will use self-tapping screws to attach both of them. The 12-volt hot lead coming from the rear plug will go through the 40-amp circuit breaker and directly to the positive side of the battery. We will use a 20-amp circuit breaker to connect from the vehicle's positive side to the 12-volt hot lead of the brake control. Now, we will use the extra wire that was bundled that we cut off from running it from the rear of the vehicle. Once you have these lengths correct, you will need to cut them and install a ring connector to the end of the white and the end of the black. The white wire will get a large ring connector as it will go directly to the negative side of the battery, and the black wire will get a small ring connector as it will connect to one side of the circuit breaker. Now, we will need to go and take another section of black wire, go from the other terminal on the circuit breaker and measure our length out to the battery. Then, go ahead and connect these to the circuit breaker, but do not connect them to the battery yet. When connecting the circuit breakers, the gold side of the circuit breaker will connect directly to the battery, and the other side will connect to either the brake controller or to the running plug. We will repeat the process for the 40-amp circuit breaker by trimming another section of wire to go from the other side of the 40-amp circuit breaker to the positive side of the battery, again using a small ring connector on one, which will go to the circuit breaker, and a large ring connector on the other side to go to the positive of the battery. Then, putting a small ring connector on the black wire that is run from the rear of the vehicle. Again, do not connect the wires to the battery until after the installation. Now, it's time to move inside the vehicle. In this particular installation, we're not going to use the metal bracket that comes with the kit, but we're going to use the plastic bracket that comes with the kit so that you can remove the brake controller if you wish and just unplug it from the wiring. As you will see, we've located the brake controller to go just above where the gas pedal is on the lower dash panel. The bracket will be connected again with 2 self-tapping screws. Make sure that behind the panel there is no wiring or anything that can be screwed into and damaged. You will notice on the brake controller leads, there is 4 wires that come out of the connection, a black, a blue, a white, and a red. The black will go up to the 20-amp circuit breaker that we connected under the hood. The white will go to the ground on the battery. The blue will connect to the white wire that ran from the back of the vehicle that hopefully you put a small piece of blue tape or some way to mark which was the blue wire. The red wire will tie into the brake switch on the brake pedal. You will use the small LED tester light that is supplied with the kit. We will be connecting the red wire to the blue wire in this installation because the blue wire is the one that only turns on when the brake pedal is pressed. As you will see, the light only lights up when the brake pedal is pressed. Now that we know which wire we will be connecting the brake switch to, we need to go ahead and make our connections with butt connectors connecting the black, the white, and what would be the white with the blue line on it or the blue wire of the brake controller. To help clean up under the dash, I went ahead and used some electrical tape and wrapped up the wires to give it a little neater appearance. You need to be sure that as you zip tie your lines up under the dash that you keep it clear of any brake movement or any other parts that may move or have very sharp edges. Again, you may want to go ahead and snip the ends of the zip ties off once you've completed cinching them all down. Now, to connect the red wire with our brake switch wire, which is the blue one on this particular vehicle, you will want to use a quick connector where you slide both wires through it and then use a pair of pliers to squeeze the metal section in the middle through both lines making a connection. Then, snap the top cover closed, and your connection is completed. Now, we're ready to go ahead and make our connection on the back of the brake controller. As you will see, there is a clip on one side. You will want to slide the connector in making sure it snaps firmly in place. Now, you can go ahead and put it into the bracket that we mounted to the lower dash section. If you push the bottom in first, the top has 2 sections that will help snap into place securing the brake controller to the bracket. Now, we need to move back the front of the vehicle where we can connect our leads to the battery. We'll start with connecting both of the positive leads to the positive side, which in this case are both black wires. Once that is done, we'll move to the negative side of the battery, where we will connect the one white wire. In this application, the nut 00:09:07 that we use to connect the wires to the battery is part number 185916. Now that we have all the connections made, once your trailer is connected, go ahead and step on the brake and make sure that there's numbers appearing on the brake controller as well as using the manual override to make sure that numbers are appearing on the brake controller. That completes our installation on our Takonsha Primus IQ trailer brake controller, part number TK90160, and the ETBC7 universal wiring 7-pin installation kit on our 2005 Chevy Colorado. .


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Test Fit:
Joe V
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Nicholas E
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Jacob T
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Andrew L
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Kathleen M
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Cole B
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Shane T
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Shane H
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Installed by:
Jeff D
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Jared G
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Andrew S

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