How to Test the Redarc Tow-Pro Brake Controller
Updated 09/29/2025 | Published 05/10/2025
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Question:
Hello...I have finally fitted my Redarc brake controller to my 2024 Subaru OB Wilderness.But on pressing the controller button the blue light come on and fades away,then nothing..is this normal..even driving the same happens. However my car is not towing and the hitch plug not connected..is there something wrong ..? Thanks
asked by: Derek A
Expert Reply:
Hey Derek welcome back! There's nothing wrong with the Redarc Tow-Pro item # RED52VR. You'll need to have a trailer connected for it to do anything.
If you want to test that it's functioning correctly, connect your trailer to the 7-way and hit the manual override or test the bottom right pin on your Subaru's 7-way connector with a mutli-meter like item # PT89ZR. If everything is functioning correctly you'll get 12 volts on that pin when you hit the manual override.
If you have any additional questions or run into any issues feel free to add them into the comment box below and I'll be happy to help you.
Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Splice-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
more information >
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on Trailer Brake Controller
Jerred H.
9/29/2025
Hey Derek, did connecting your trailer and using the manual override help confirm that your Redarc brake controller is working properly? I'm asking to see if this solution worked for you and could help others in a similar situation.