Troubleshooting N.C. on Tekonsha Prodigy IQ Brake Controller

Question:

I was having the same issue as discussion Troubleshooting N.C. Message on Tekonsha Prodigy Brake Controller Installed on Nissan Frontierfoot however, I have since replaced the plug on the trailer end. I noticed that when the Prodigy unit goes to power saving mode and when first tested with the over ride will show the readings correctly for about 10-15 seconds and then will default to n.c. code. I have also tested with a meter on the truck plug and trailer box where the harness connects to the trailer harness and both show around 2 volts when the brakes are applied. All ttow fuses in the truck 2006 Nissan Frontier were also checked and okay. Thoughts?

asked by: Troy C

Expert Reply:

What happens when you test with a trailer? Do the brakes seem to work correctly then or does the NC code still show? I can help you troubleshoot the setup to determine where the problem is.

Testing the brake controller is fairly easy. Sever the blue brake output wire near the brake controller leaving enough room to reconnect it and then apply the manual slide. Using a circuit tester like the Quickee Tester, part # PTW2993, you should get output to the controller side of the wire you severed. 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.

I am including a link to a video that will show you how to test the wiring on a brake controller.

expert reply by: Jameson C