Troubleshooting Redarc Tow-Pro Elite Brake Controller Not Recognizing Trailer On 2019 Toyota 4Runner
Updated 08/21/2021 | Published 08/20/2021
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Question:
Hi, ive installed a tow pro elite on my 2019 4 runner. I used the factory pigtail supplied by Toyota. the red arc controller has 4 wires and the Toyota plug had five. I omitted the green with silver band wire from the hook up as I read it wasnt required, when I hook the trailer up the control knob only blinks a slow blue light then fades. I believe this indicates that the trailer is not recognized. Also I should mention that the hitch is not a typical ball hitch but an articulating type by Maxcouplar. The trailer running lights work, the brake lites and signals work but the brakes do not? Can you help?
asked by: Jeff G
Expert Reply:
This is a common problem that I have seen when using the factory connector on your 2019 Toyota 4Runner. The ground wire for the brake controller is not capable of supporting the negative power from the Redarc Tow-Pro Elite # RED44FR.
Redarc has their Plug-and-Play Wiring Harness # RED49FR that includes an additional ground wire that needs to be connected to a good ground source on your 4Runner. You can try splicing in an additional ground wire on your current universal harness to get the ground terminal working properly.
If that still does not solve your problem you will need to check your 7-way connection for continuity with the brake controller. There may be a bad connection in the harness that is not allowing power through the wire to the trailer.
Product Page this Question was Asked From
Redarc Tow-Pro Elite Brake Controller - Dash Knob - Off-Road Mode - Up to 3 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Splice-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 3 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
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