Tekonsha Prodigy RF Wireless Trailer Brake Controller Installation - 2003 GMC Sierra

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How to Install the Tekonsha Prodigy RF Wireless Trailer Brake Controller on a 2003 GMC Sierra


Today on our 2003 GMC Sierra 1500, as well as our enclosed trailer, we're going to be installing the Tekonsha Prodigy RF Wireless Trailer Brake Controller, part number 90250. We're going to go ahead and start here underneath the hood of the vehicle. We're going to need to gain access to the underside of this fuse box and we need to hook up our wire. Now, this particular truck does not have the 12-volt power supply of the 7-way hot yet. That's the reason why we're going to need to get into this fuse box. To do that, we're going to need to remove these 4 bolts here, as well as lift this bracket out of the way. Next, we're going to go ahead and lift the cover off our fuse box.

Next, we'll need to release the tab right here, as well as there's one down there, to remove this whole plastic cover. Now our red wires have already been hooked up to each the studs. But what's missing on our particular vehicle is the fuse that goes right there. So we're going to need to pull out just the plug and we're going to go ahead and install a fuse into here. We're going to be putting in a 30 amp fuse for this 12 volt power lead that goes back to the 7 way. So go ahead and line it up and push it down in. Now before we put it back together let's go check our 7 way to make sure that our 12 volt power lead is now hot. Now we'll go ahead and take our test light and we'll need to touch the prong on the 7 way that is at the one o'clock position. Now that we've checked the power source at the 7 way at the rear of the vehicle, we know that works, we can go ahead and re-install the items under our hood. Now here's what our RF box looks like. Now it can be mounted in any direction, like this, on this side of the frame rail over here on this side. But you need to make sure that this top here is facing up. And ideally the 8 foot power cord or 7 way plug that comes off the front of the box would be facing forward. This will help protect the connector here at the back by putting it towards the rear of the trailer and helping to eliminate any excess water or debris that could get in the plug over time. Now on this trailer there's already something mounted on the outside of the driver's side frame rail. So we're going to mount it here inside the passenger's side frame rail. Now when mounting the box you also want to make sure you leave enough room that you can plug the 7 way from the trailer into the plug here. If we go somewhere in this general area we should have plenty of room. Now you want to make sure the top of the box here is just above the frame rail as well. We'll be using 4 self tapping screws that come with the kit to attaché our box to the vehicle's frame. You also want to make sure the top of the box is level, or within 5 degrees either way. We'll go ahead and take our self tapping screw in the box and go ahead and get our first mark here. It's a little hard to get the drill in here. So now that we have our first mark we'll go ahead and drill out this one. And we'll attach the box at this location. Now we'll go ahead and set our box back up in place, put our screw through the hole, go ahead and take a ratchet and tighten down the screw. Now that we've got our box positioned where we want it we'll go ahead and drill in the last of the three screws. Next we're going to need to pair the brake controller that's mounted here on the trailer with the remote control that will be in the tow vehicle. Now you need to make sure at this time that the trailer's 7 way is not plugged into the Prodigy box mounted on the trailer. We'll go ahead and take the 7 way plug that comes off of the Tekonsha box and plug it into the 7 way here at the back of our vehicle. Now that we have our 7 way plugged in, now we go into the cab of the vehicle. Now we'll go ahead and start the vehicle's engine. With the engine running, we'll go ahead and take out hand held remote and plug it into our 12 volt outlet here in the cab of the vehicle. We'll then need to turn the power knob, which is the roller knob or the blue knob on the right hand side of the hand held to the minimum position. So you roll the knob downward. You'll then fully push in and hold both the manual override button which is the button on the left hand side of the hand held and the boost button which is a little blue button in the top right hand corner. You'll hold these in. While the display will start at P.5 and end at P.A. Once P.A has been achieved the two buttons may be released. You'll then press and hold the brake pedal until the display shows 0.0 for a correct pairing. You'll then set the control or the power knob which is the blue roller knob on the right hand side to something greater than minimum. So you want to roll that back up a little bit. Now we're ready to go back to our controller that's mounted on the trailer and we'll need to plug the trailer's 7 way plug into the box. Now with our 7 way plugged in we can go ahead and use a couple of zip ties to secure up any loose wire. We can then go ahead and trim up any excess zip tie. Now that we've plugged our trailer into the box you'll see that there's a .C. The . after the C means that the boost feature is on and the trailer is connected. Now that we've taken the boost feature off it just has .C. That's telling you that the trailer is connected. You can push the manual override button, which is this button here on the left, you can check what the setting is by pushing in and adjusting the roller knob over here on the right hand side. You can set it for whatever the maximum power output you want it to be. Go ahead and leave it at about 8 for now. And then if you want to adjust the boost you push the blue button. Now the boost is how aggressive or how quickly you want the brakes to be applied to the trailer. Now to make sure that we have our proper setting on the power level go ahead and push the manual override, we're going to take the controller back down to 6 for now. And then we'll go out and do a quick test drive and see if we need to adjust more power into it or take a little out of it. Now we've gone ahead and checked by getting our vehicle up to 25 MPH and then pushing in the manual override button. Now, we need to add just a little bit more power as it's not quite stopping the vehicle as we'd like. So with the manual override held in, we'll go ahead and take it up to about 6.5, and we'll do our test again. Now when we re-did our test again we found that we maybe need to go just a little bit higher. Since we are using a half ton vehicle, I'm going to set it a 7, and we'll run the test one more time. So right there at 7.0 is the perfect setting for our vehicle and trailer combination. Now as you can see here if the wheel begins to lock up, you'll need to back the power off just a little bit as you have it turned up just a little too high. You do not want the wheels to lock up when you push the manual override. Now since the Prodigy RF is a proportional style brake controller when you step on the pedal of your tow vehicle you may notice it doesn't go all the way up to it's maximum setting that you have the power level at. And the brake controller is sensing how much power will need to be applied to the trailer brakes to bring you to a nice safe stop. Now as you notice this time when we step on the brake on the tow vehicle the brake controller only went up to about 1.9. That's because it sensed it only needed that much power to help bring the truck and the trailer to a nice safe stop. And that'll do it for the installation of the Tekonsha Prodigy RF Wireless Trailer Brake Controller part # 90250 on our 2003 GMC Sierra 1500 and our enclosed trailer.


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Installed by:
Joe V
Installed by:
Cole B
Installed by:
Brent H
Video by:
Andrew K
Video by:
Joshua S
Video by:
Chris R
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Joshua S
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Jacob T
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Mike H
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Zach D
Test Fit:
Shane T
Test Fit:
Robert C

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