Troubleshooting Blue LED on Redarc Tow-Pro Liberty Brake Controller

Updated 09/24/2025 | Published 09/21/2025

Question:

My red arc will light up blue when I press the button, but it will not calibrate by changing colors and brakes won’t work

asked by: James

Expert Reply:

Hey James!

The instructions for the Redarc Tow-Pro Liberty Brake Controller # RED53CR show that with the blue LED means that you'll need to check all of your connections. Have you done that yet?

expert reply by: Jon G

Blue LED Cause for Tow-Liberty Brake Controller
(click to enlarge)

James

9/24/2025

Yes, I checked the connections and disconnected my battery and that seemed to work. It came on and calibrated. Everything is working fine. One other thing I’m having trouble with the knob seems to be stripped out. I have to take it off to turn up or down if you could point me in the right direction to get a new knob

Jon G.

9/24/2025

@James Glad to hear you were able to get it all calibrated and such! Sounds like you're looking for the Replacement Control Knob for Redarc Tow-Pro Liberty # RED57FR. The controller does have a 2-year warranty; did it come with the stripped control knob, or was that something you think you did once you had bought it and used it?