Troubleshooting Redarc Trailer Brake Controller Issue Flashing Red on a 2019 Toyota Highlander
Updated 04/24/2023 | Published 04/22/2023
Question:
installed a RedArc brake contoller on my Highlander. Was working fine, but now flashing red intermittently more often than not. From reading here, it is likely a bad connection / poor voltage transfer. I used a multi tester on the tow vehicle 7 way and measure 2.09v to bc pin. Am I testing correctly?
asked by: Jim S
Expert Reply:
It sounds like you are having a ground issues on your trailer while using the Redarc Tow-Pro Liberty Brake Controller # RED24FR with your 2019 Toyota Highlander. The small amount of voltage you are seeing at your 7-way from the brake wire is what tells the controller you are connected to a trailer as it completes a circuit. This small amount of voltage is not enough to activate the brake magnets to slow the trailer. I recommend starting by checking the ground connections at the 7-way and the brakes. This voltage can have issues if there is corrosion built up for the ground connection.
Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Plug-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
more information >
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