Tekonsha Prodigy P3 Brake Controller Shows Warning Output Shorted No Brakes with New Breakaway

Updated 06/25/2021 | Published 06/23/2021

Question:

I have pro series breakaway kit installed on my trailer. It is showing a output short on my p3 tekonsha break controller. This only happens when the battery for the breakaway is installed when you take the battery out the warning goes away. It look like it was wired wrong so I followed the wire diagram for the breakaway and it is still causing the warning only when the battery for the breakaway is installed. Thanks

asked by: Scott

Expert Reply:

The "Warning Output Shorted No Brakes" error message on the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 per the manual can be caused by one of two things. I have listed these for you below:

1. Detects brake output wire shorted to ground. Short during idle condition.
2. Use of some test lights or non-Tekonsha testers can cause this problem.

Therefore, it sounds like you have a short in the usually blue brake output wire or it is installed incorrectly. This can an issue on the vehicle/trailer or both. The only solution would be to recheck the wiring. It sounds like the issue is with the breakaway system. It could also be possible that the brake controller is incompatible with the breakaway system, especially if the brake output wire runs through a circuit board.

expert reply by: Conner L