Trailer Brake Controller Intsallation - 2008 Chevrolet Tahoe

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How to Install a Trailer Brake Controller on a 2008 Chevrolet Tahoe


Today on our 2008 Chevrolet Tahoe, we'll be installing the Tekonsha Prodigy P2 Brake Controller, part number 90885. The vehicle is already equipped with manufacturer's 7-pole connector, so we'll need to go underneath the dashboard here on the driver's side and locate the brake controller pigtail. This is a 4-wire pigtail, has taped up and marked indicating the wiring. Now we've identified the manufacturer's wiring, we'll need to take the pigtail provided by the brake controller and hardwired to the manufacturer's wiring. I'm going to go ahead and cut the end off and strip back the wire. Now with those stripped back we'll go ahead and take the butt connectors provided by the install kit and secure it to the end. Now with the butt connectors installed, we can go ahead and attach the brake controller wiring.

For this application, we'll have blue to blue, this would the power to the trailer braking. White to white would be the ground for our brake controller. Then we can take the red wire from our pigtail, match it up with the blue wire with the white stripe on the manufacturer's harness and this will be the brake switch signal. Last will be our power, for the brake controller pigtail, it's the black wire and on the manufacturer's side, it's the red one. Once we have all our connections complete, we can go ahead and wrap it up with some black electrical tape. This will help keep the connection points clean from dirt, dust, debris or moisture.

We'll go wrap up the pigtail also which will help with cleaning up our install look in blending our wires together. All right. Now with our pigtail wrapped up, we're going to go ahead and set that aside and move to the brake controller pocket. The pocket is going to mount here directly to the dash, it will hold the brake controller. We'll use this screws provided with the install kit to secure the brake controller pocket.

Now once we have the pocket mounted, we can go ahead and route our pigtail to the pocket. Keep in mind when routing your wires stay inaudible 00:02:48 set to the brake or gas pedal. We'll feed our pigtail up to the pocket and then bring in our brake controller where we can make connection with the pigtail, dropping in the pocket and secure it. As you can see we already having power to our pigtail which shows an NC for no connection on our brake controller. Now let's go ahead and secure our wiring. To secure the wiring, I'm just going to use a few black zip ties.

Now on most applications, the power will not be hooked up for your brake controller or your 7-pole connector. But if you remove the fuse box lid you can see on this application we follow this wire, it will go down to the main wiring harness and you could even see where the tape was torn away from the harness where the wire was originally taped to the manufacturer's harness below the brake master cylinder, this is the hot lead for the 7-pole connector at the back of the vehicle. Our second red wire here will come and go along the inside of the fender well between the fuse box and the sheet metal. Here again you can see where it was torn away from the harness and the connection was run to the fuse box and made. If you we're to take a look at both these ring terminals, they are size-specific, so if you pull up on the handle of the fuse box you can see the different size of terminals. We have a 6 millimeter nut here securing one, and 8 millimeter nut securing the other. All right, with that we'll now go ahead and review the operation of our brake controller. As we showed earlier the NC stands for no connection when our trailer braking is disconnected. When it's connected, we'll get a C to stand for connection. There you have it for the install and operation of the Tekonsha Prodigy P2 Brake Controller, part number 90885, on our 2008 Chevrolet Tahoe. .


Questions and Comments about this Video

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Tye Brookshire 05/10/2019

I recently installed the prodigy p2 trailer brake controller on my 2007 Tahoe. The manual brake lever on the controller will not activate my brake lights. The trailer brakes work both with the brake pedal and the controller brake lever, but the lights only work with my brake pedal. I have checked voltage, and with the pedal depressed, I have 12v to the brake lights, 7-way, brake controller blue w white stripe, and brake pedal switch blue w white a stripe. With the brake controller lever I get 12v coming from the controller, and to the brake pedal switch blue w white stripe, but not to the brake lights, or 7-way connector. Other than the lights not working with the controller lever, the controller is doing its job. 55117

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Rachael H 05/24/2019

Since you checked the voltage at the 7-way and brake controller it sounds like you are getting signal to the 7-way. I do know that for some GM models there are 2 wires under the hood that need to be installed to fully activate the pre-wired brake controller package. Please check out the attached help article and see if you have those to wires connected. Another thing to check is the CHMSL (center high mount stop lamp) fuse. If that fuse is not functional the brake lights may not be activating either. 48929


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