Preventing Pre-Collision Warning of 2018 Toyota Highlander After Brake Controller Install

Question

Question:

Just installed a Redarc brake controller, and now I have a precollision warning when Pressing the brake button down. I notice answer to a question about a reliance brake controller install, that a diode could be install. Would that work for the Redarc? Which wire and which direction would the diode need to be installed?

asked by: Matthew L

0

Expert Reply:

For your 2018 Highlander and the Redarc brake controller # RED44FR you'd need to install a diode on the red wire of the brake controller to prevent voltage from back feeding on your brake light circuit. For a diode you could then use the part # RM-690.

expert reply by: Jameson C

0

Answer 1

Like you said, many factory integrated brake controllers will not work well with electric over hydraulic trailer braking systems. Some of the newer versions of these controllers now have an electric over hydraulic mode. Check to see if any of your…

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Answer 2

Have you tested the brake controller output on the 2025 Silverado's 7-way and confirmed that it's sending power back to the trailer when the manual override is being activated? When you say the brakes aren't activating as they should do…

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Answer 3

The integrated brake controller of a 2012 Ford F-350 is SUPPOSED to be compatible with electric over hydraulic brake actuators on trailers but what we've found is that a lot of integrated truck brake controllers just don't work consistently…

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Answer 4

Yes you need the diode arrow to point towards the brake controller. That will allow the voltage to travel into the controller but not backfeed back on to the Highlander in any way. If you need a diode we have the part #RM-690.

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Answer 5

Thanks for reaching out, Jim! The Roadmaster Single Park Light Diode #RM-690 will work great for this application, and I'm glad to hear others have been successful using it! You'll want to install the diode on the wire connected to the 1…

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Answer 6

The Grand Design Solitude 310GK uses a Lippert 1621 pin box so the correct Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter is part #RP85FR. If you wanted to confirm, you'd simply look for the model number which will usually be on…

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Answer 7

As you can see on the attached photo, the wiring diagram for the actuator shows there can be a 25-40 amp circuit breaker in-line with the black wiring which goes from the battery's positive terminal to power the actuator. This is actually only…

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Answer 8

There sure is! The Redarc Encapsulated Power Diode for Tow-Pro Brake Controllers #RED34FR you were looking at gets wired as shown in the included diagram. One of the red wires goes to the red brake output wire on your trailer brake controller, the…

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Answer 9

Hey Tim, it sounds like your Grand Design may have electric over hydraulic brakes but I am not totally sure. If that's true make sure your brake controller is put in hydraulic mode. Otherwise an aftermarket brake controller that was designed to…

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Answer 10

Hello Dan, We can most definitely get you set up to use your Redarc Tow-Pro Liberty brake controller in your 2022 Toyota Highlander. Since you were looking at the #ETBC7, I’m assuming your Highlander does not have the factory tow package. To equip…

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Answer 11

The dealer tech you talked to is somewhat correct. The issue is that the red brake output wire can back feed into the wiring of your 2020 Toyota Highlander, but there is a fix that will fix this. Your Highlander will need to have a Tekonsha,…

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Answer 12

Hey Danial, thanks for the follow up question! Your 2024 Toyota Highlander will just need the 7-Way Kit #ETBC7 along with the Curt Echo In-Line #C79DR. With this setup you won't be splicing into the stop light switch on your Highlander so even if…

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Preventing Pre-Collision Warning of 2018 Toyota Highlander After Brake Controller Install

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