Size of Fuse for Installation of Redarc Tow-Pro Liberty Brake Controller

Updated 09/12/2025 | Published 08/26/2025

Question:

What size fuse do I need for the Redarc liberty brake controller? Thank you

asked by: Patrick A

Expert Reply:

Hey Patrick! The Redarc Tow-Pro Liberty # RED52VR calls for a 30A circuit breaker or fuse on the power wire as close to the battery as possible. See the diagram below.

expert reply by: Robin H

Tow-Pro Liberty Wiring
(click to enlarge)

Robin H.

9/12/2025

Hey Patrick, did the 30A fuse work well with your Redarc Tow-Pro Liberty brake controller? I'm curious to know how it turned out for you, as it could help others looking to set up their brake controllers.

Patrick E.

9/12/2025

@RobinH Robin, yes the fuse works. however, I am not getting any signal from the blue wire. We have checked and 2x checked connections. We have power going in the unit, but no voltage coming out. red wire 12v only when brake is pressed Black(-) 12v Good ground Know set 10, activate manual brakes.......nothing LED only pulses blue, no red or other colors. we have confirmed connectivity on every wire to its source.