Trailer Brake Controller Installation - 2006 Chevrolet Trailblazer

Installation of a Trailer Brake Controller on a 2006 Chevrolet Trailblazer

Today on this 2006 Chevrolet Trailblazer we are going to install the Prodigy P2 brake controller part number 90885. The first step is to get access to the wire harness itself. There is a plastic trim panel right here along this edge that goes toward the front of the vehicle. There are two screws here and here that we have to remove so you can take it down and out of the way to get to the wire harness. From here it should just unsnap. Over here on the far left is the wires for the brake controller. They are taped up so you will probably have to pull them out a little and we have our four wires. 00:43

So we have got access to the wires, now we are going to find a place to install the brake controller. I think what we will do is mount it in this location somewhere around here and we are going to run our wires from underneath here back over to our wires from the vehicle itself. We will start off by wiring up the harness first. We have got the wire harness here and I can tell this is not going to be exact color for color match up because basically we do not have anything to match hardly. The only thing that is going to match up though is blue to blue because if we check on the label we are going to go by function instead of color. We will double check. Dark blue is labeled AUX which is auxiliary but that also means that it is going out to the 7-pole connector as a brake wire. 01:24

We will just get that ready to go and we will just use the butt connectors that came with the brake controller to make our connections. And we are going to be doing blue to blue because blue will be our output on our brake controller. Next we will deal with the orange wire and orange is labeled battery so that is going to be the 12 volt power supply from the battery and that is going to hook up to the black wire on the brake control cable. Lets move on to the light blue wire which is labeled CHMSL which stands for Center High Mounted Stop Light so that will be our brake signal for our brake controller and that will hook up to the red wire on the brake control cable. This wire is kind of thin so when you use it with the butt connector we will just fold the end over a little bit to give a little more for the butt connector to grip onto. Use the small blue one for that and the last wire is going to be black and that is labeled the ground. The white is going to be ground on the brake control cable. 02:41

We will tape up the connections and start routing the wire. Lets route the cable, pack it through here to give us a good amount of length and then what we will do is zip tie the excess wire to this harness right here and then we will put everything back together and we will reinstall the screws. Lets do a couple of test fits here. This sits okay right here but it looks like if we move it up a little bit onto the gray part it fits tighter against the dash. I think we will install it in this point here. We are going to use the screws provided in the kit to attach to the plastic part of the dash. Lets plug in the adapter cord to the brake controller and we will install the brake controller and install the set screws into the bracket. When you have the trailer connected it will say C for the connection and then you can see numbers that come on for the power output when you hit the manual override. Now you can see how you can control the gain forward is full power and back is no power. With that, our brake controller is already installed. There you have it for part number 90885 the Prodigy P2 brake controller on the 2006 Chevrolet Trailblazer.