Troubleshooting Tekonsha P3 Brake Controller that Constantly Shows Braking Output Reading

Question

Question:

This season I have been having an issue with my Tekonsha P3 brake controller, I did not notice this last year. Everything seems normal while I am braking, however when I let off the brakes instead of returning to 0.0 it will often stay at 0.6 or 0.8, etc. Some time it will even increase from there. Similarly, when I am stopped at a light/sign and then accelerate, the brakes will often stay on not locked up often in the 2 - 4 range which is obviously very noticeable. To get the controller to return to 0.0, I simply tap the brake pedal gently and it will return to zero. Also, the controller will occasionally jump up when I hit a bump. Any thoughts? Is this a truck side brake sensor issue 2007 Suburban 2500? Thank you!

asked by: Matthew B

0

Expert Reply:

The issue is the red wire of yoru brake controller. It's only supposed to see voltage when the brakes are applied which then tells the P3 # 90195 to start looking for deceleration and apply proportional braking power. If there is a short on this circuit and there is voltage on it all the time the controller is basically active all the time and will apply the trailer brakes with any change in inertia.

So what you'll want to do is check the red wire of your brake controller for a short to the black wire of the controller and fix as needed and you'll be set.

expert reply by: Jameson C

0

Tanner B.

11/8/2021

Did you find a solution? I am having the same issue with my 07 Silverado 2500. I am showing output voltage as soon as I turn the key, even with the trailer disconnected. I double checked all the wiring connections and everything looks good. I am stumped.

Reply

Les D.

11/10/2021

I would follow the advise of the question you commented on, which read; The issue is the red wire of your brake controller. It's only supposed to see voltage when the brakes are applied which then tells the P3 # 90195 to start looking for deceleration and apply proportional braking power. If there is a short on this circuit and there is voltage on it all the time the controller is basically active all the time and will apply the trailer brakes with any change in inertia. So what you'll want to do is check the red wire of your brake controller for a short to the black wire of the controller and fix as needed and you'll be set. If this test fails you will need a replacement controller.

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Answer 1

If your Tekonsha P3 Brake Controller, part #90195, displays the error message OUTPUT SHORTED NO BRAKES, the potential causes are a short in the brake output circuit somewhere between the brake controller and the trailer brake assemblies, or a shorted…

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Answer 2

Tekonsha's P3 brake controller offers a boost feature that gives you more initial braking power for those times when you're towing heavy loads. You can switch boost levels so that the power output to your trailer brakes automatically starts…

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Answer 3

The Tekonsha Prodigy P3 #90195 has the ability to show a few different voltages when your vehicle is parked. The first option is your tow vehicle battery voltage which should be at least 12V if not more. The second is output power from the stoplight…

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Answer 4

I am not entirely sure what process you took so I'll give you some other things to try, or maybe a different way to test the Prodigy P3 #90195. First, sever the blue wire a couple inches from the back of your controller. Then use a circuit tester…

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Answer 5

I think you are going in the right direction. I would definitely replace the 14 gauge wire going to the trailer brake magnets with 10 gauge wire or larger. Usually larger than 10 gauge is hard to get into the trailer connector though. I would also…

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Answer 6

I believe you almost solved the problem when you swapped the wiring, but in reality you needed to use 10 gauge wire like part #10-1-1 (sold by the foot). You are experiencing a voltage drop due to the long distance of wire that's not thick…

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Answer 7

The easiest way to install your Tekonsha Prodigy P3 #90195 is to use the Tekonsha Plug-In Wiring Adapter #3024-P. This adapter will not require and cutting or splicing into your 2016 Ram 3500's factory wiring. If you need to hardwire install the…

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Answer 8

The Tekonsha P3 Brake Controller, item #90195, has built in troubleshooting diagnostics that you can access by pressing the menu button then selecting help and pressing ok. You will then be able to monitor the battery voltage supplied to the unit,…

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Answer 9

I would check the power distribution box under the hood of your 2005 GMC Sierra 2500HD . The box is located under the hood and on the inside of the drivers side fender. Remove the cover, and locate the two auxiliary power posts on the inboard side of…

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Answer 10

If you sever the blue wire leaving the P3 controller part #90195 leaving enough room to reconnect it and test the end of the wire leaving the controller with a circuit tester like part #PTW2993 you should see voltage when you slide the manual…

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Answer 11

Your Tekonsha Prodigy P3 Trailer Brake Controller #90195 when flashing Warning! Overload No Brakes, is detecting an excessive current overload condition during operation according to the installation details I've attached. This means there is a…

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Answer 12

To determine why you do not have any power on the blue brake output wire, I recommend starting at your brake controller. First, make sure the brake controller is on and receiving power. Most brake controllers have 4 wires, blue (brake output to…

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Troubleshooting Tekonsha P3 Brake Controller that Constantly Shows Braking Output Reading

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