The first step I would take is to make sure that the 7-way trailer connector on your RV has power on the battery charge pin (see diagram). You can test for power using a circuit tester like part # PTW2993. The Tekonsha Prodigy RF, # TK94FR, requires 12-volt power from the tow vehicle to function properly. If your trailer connector does not have a constant 12 volts at the battery charge pin, then the main unit is not receiving power which would explain the nc code on the handheld unit.
Also,... view full answer...
First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached.
If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue.
Make sure that the trailer side connector are clean... view full answer...
Go To Results