Brake Controller Showing NC when Trailer is Hooked Up and Manual Control is Pressed

Question

Question:

On my Dodge 1 ton 2005 4x4 I plug the controller in, hook the trailer up and press the manual control and get a N.C. read out. I tried it with both trailers and got the same results. Tried a neighbors trailer, same thing. Took the truck to the local shop where they tried the truck with a Reese controller and all worked OK. Do I have a faulty Prodigy P2? Or is there something Im missing here?

asked by: Craig

0

Expert Reply:

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, part # 90885. The 4 possible causes for NC are as follows.

1. Trailer not connected to tow vehicle.
2. Trailer connected with open circuit on brake line.
3. Trailer connector disconnected or corroded.
4. Loss of trailer brake magnet ground.

Testing the Prodigy P2 brake controller is fairly easy. Sever the blue brake output wire and then apply the manual slide. Using a circuit tester like part # PTW2993, you should get output to the trailer brakes. If the manual slide activates the trailer brake output wire properly, try the brake pedal. If the brake pedal activates the brake output properly also then the problem is farther back either in the vehicle wiring or on the trailer.

If either the brake pedal or the manual slide are not functioning properly you will need to test the wires going into the brake controller. Make sure you have power entering the brake controller on the black wire. On the red wire you will only want power when the brake pedal is pressed.

If there is power on the red wire before the brake pedal is pressed, you have connected the red wire from the brake controller to the wrong circuit. You would then need to find the brake switch wire that has power ONLY when the brake pedal is activated.

If these connections check out and the brake controller is properly grounded, then there is possibly a problem inside the brake controller. The brake controller is not user serviceable and would then need to be replaced.

I am including a link to a video that will show you how to test to see if your brake controller is working properly. Also, a link to a FAQ page on brake controllers.

expert reply by: Jeff D

0

Answer 1

Without knowing what brake controller you have I will venture to guess that the OL code you are seeing is an over load code. The OL or overload error code indicates a short in the brake output circuit. Start by examining the trailer connector. Make…

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Answer 2

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 3

If your trailer has 7 wires running all the way back to the brakes, then yes, you can tap into the existing wiring. Each of your new brakes will have two wires for the brake magnet. One wire is for 12 volt power to the brake magnets and the other…

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Answer 4

You likely can use any replacement switch since all they do is complete a circuit when the pin is pulled out. One wire on the switch should be connected to the positive battery terminal on the trailer. The other will tee into the wiring leading…

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Answer 5

Yes, the pin can be pulled off and you can then replace the wire. Make sure that everything is disconnected so you do not accidentally set the breakaway kit off.

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Answer 6

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 7

This is a fairly common problem that is almost always due to corrosion on the trailer connectors. Check both the connector on the tow vehicle and on the trailer for corrosion and/or a bent pin and fix as needed. I attached a help article on…

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Answer 8

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 9

The Bargman 7-Way, RV-Style Connector #WG54006-043 referenced in your question uses the standard RV-style pin locations for its 7-Way connector. I have attached a diagram of these locations and their functions for you to check out. Wire colors will…

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Answer 10

The blue output wire at the back of any brake controller such as your older Activator should carry a voltage with full current only under two particular conditions. One is when the red input signal wire is getting a brake light signal from your…

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Answer 11

It sounds like you are just looking for a replacement 7-way connector to replace the factory connector on your 2018 Ram 1500, and we have exactly what you need: - 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket, Chrysler/Dodge OEM Plug…

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Answer 12

If you are referring to two white wires from the brake magnet that are coming from the rear of each electric brake assembly, then it would not matter which wire is connected to ground and which wire is used for the brake feed. The magnet that…

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Brake Controller Showing NC when Trailer is Hooked Up and Manual Control is Pressed

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