Troubleshooting Fault Codes in a Redarc Tow Pro Liberty Installed in a 2022 Toyota 4Runner

Updated 09/15/2024 | Published 08/12/2023

Products Featured in This Question

Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional

(2504)

$190.00

Plug-and-Play Wiring Harness for Redarc Tow-Pro Classic, Elite, or Liberty Trailer Brake Controllers

(308)

$35.00

Question:

I just installed a tow pro liberty on my 2022 4runner by using the tph-021 harness. I am getting fault codes on the knob but all wiring connections are fine. The fault codes come on intermittently. Do I need to add this product? The REDARC website states that a diode is already in the stock tow package. Seems a bit confusing as I also read on REDARCS website that they recommend using their universal harness by splicing in into jumper harness that came with the vehicle. What exactly do I need to do to have the unit installed properly with no faults?

asked by: Vinny V

Expert Reply:

The easiest way to determine what could be causing the issue with your Redarc Tow-Pro Liberty Brake Controller # RED24FR, installed in your 2022 Toyota 4Runner using the Plug-and-Play Wiring Harness # RED49FR is to check the fault code chart in the installation instructions.

There are a number of different fault codes that indicate the problem and solution. I have included pictures of the fault code chart here for quick reference. If you you need further help with this, please let me know what fault code(s) you are getting.

expert reply by: Scott S

Redarc Tow Pro Liberty Fault Code Chart
(click to enlarge)

Richard H.

9/14/2024

Scotty, my just installed TP elite on my 23 4Runner. Has the slow blue blinking when pressing the Redarc knob, but no other function. I used the TPH-21 HARNESS. IS the Red49fr harness different. I've read somewhere the newer 4Runner with led lighting has had issues working correctly. Any assistance would be fantastic. Richard

Jerred H.

9/15/2024

@RichardH Hey Richard. The Plug-and-Play Wiring Harness item # RED49FR is Red Arc's TPH-021 harness. We haven't heard about any issues with LED lighting. Haven't heard any issues actually with people that use the plug and play harness. Have you tried checking the voltage with a item # PT29ZR coming off of your 7-way connector when you push in the manual override? I am wondering if you have a wiring issue somewhere between your connector and the adapter port.