Troubleshooting Prodigy P2 Brake Controller with NC No Trailer Connected Error Code

Question

Question:

purchased your prodigy p2 brake controller and adaptor for the plug under the dash for my 2016 F 150 / travel trailer. Installed both, connected the trailer.....lights and brakes work....controller shows NC error. What did I do wrong? followed your install video for the controller and the hitch connector, Do I need to install more relays and or wiring above and beyond what is shown on video?

asked by: Kevin

0

Expert Reply:

The NC on your Prodigy P2 # 90885 means there is no trailer connection being recognized. Usually this is due to the controller not seeing enough power draw on the 5 o'clock pin of the 7-way (the brake controller output). This can be as basic as needing to clean your connections with a little sandpaper or steel wool, a bad ground connection due to rust or debris on your trailer, or as big as a short in that wire.

I recommend using a circuit tester like # PTW2993 to check that pin for signal. When you use the circuit tester and touch that pin, the controller should read a connection because the incandescent bulb will pull enough power to register. Then the bulb should increase in brightness as you slowly adjust the manual slide. If this does not happen, then you have a short and will need to trace the wire and find the short. You can probe the wire every few feet to determine if you have signal.

If you have signal at your 7-way then clean your connections on your vehicle side and trailer side connections and then reconnect using a little dielectric grease # 11755 to keep the connection clean and keep moisture and debris out. Then check your ground connection on your trailer's main ground and then check the ground at each of your brake magnets.

expert reply by: Jason S

0

John

6/28/2020

why does my 2 hour old installation of the Prodogy P2 cycle through all the numbers .9 to 1.6 while driving un hitched and no trailer hitched attached while it is cycling thru

Chris R.

7/2/2020

I'm not sure, but that isn't normal. Can you tell me a bit more about how the controller was installed? Were you able to use a Plug-In Harness or was it hardwired?

Answer 1

The nc code on the Tekonsha Prodigy brake controller indicates that no trailer is connected. When you step on the brake pedal though it should still say that the trailer is not connected. It is possible that there is a short being caused by a dirty…

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Answer 2

It's possible the brake controller is bad, but you definitely want to check some other things before you purchase a replacement. The first thing to do is inspect both the truck's and the trailer's connectors to make sure the pins are…

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Answer 3

It sounds like your Prodigy P2 trailer brake controller #90885 may not be getting the 12V operating power from the Journey's battery. With a hardwired type of installation this input power is routed from the battery positive terminal through a…

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Answer 4

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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Answer 5

Yes, you are correct in that the Tekonsha Prodigy P2 Trailer Brake Controller part #90885 will read "N.C" while there is no trailer connected. You can absolutely leave it plugged in while while not towing as well. If you receive a voltage…

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Answer 6

You are correct, you should only be getting output when the brake is applied, or the override switch is activated. It sounds like the controller might be bad, but to make sure, you should probably bench test it before tossing it. Use a circuit…

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Answer 7

I bench tested a Voyager brake controller, #39510, and determined that with 12 volt power connected and the controller grounded and connected to the brake switch but NOT connected to a trailer, it will not light up even when you apply the brakes or…

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Answer 8

Yes, if you test your brake controller output pin on your 7-way for voltage with the brakes applied and the gain set to the max you would see a full 12 volts. You should be able to adjust the gain to get varying voltages.

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Answer 9

All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part #PTW2993 with one pin grounded and the other on the output pin.…

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Answer 10

If your Tekonsha Prodigy P2 Trailer Brake Controller #90885 is not recognizing your trailer when it is connected, I recommend starting by inspecting both your vehicle side and trailer side connectors. Check to make sure there is no debris or…

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Answer 11

For installing a brake controller in your 2017 GMC Canyon there is no plug present under the dash, but the needed wires are already run. You will connect the brake controller wiring with the vehicle wiring already present under the dash. It's up…

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Answer 12

There are 4 potential problems that are stated in the instructions (linked below) that could cause the NC (no connection) reading on your Prodigy P2, item #90885. I have also included a couple of links to wiring and brake controller information. The…

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Troubleshooting Prodigy P2 Brake Controller with NC No Trailer Connected Error Code

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