Troubleshooting Brake Controller Install in a 2015 Toyota Tacoma Where Brakes Stay On All the Time

Question:

IM trying to hook up this brake controller , I have hooked up Toyota Voyager Brown............white Blk /red...........black Red...................blue Grn / why ........red I am getting constant power at the blue wire No change when brak is applied What have I done wrong ? Kind regards

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Expert Reply:

According to the information we have for installing a brake controller in a Toyota you have the wiring colors matched up correctly. But that being said sometimes wire colors get substituted at the factory if they were to run out of a certain color.

What I would recommend you do is test all of the wires on your 2015 Toyota Tacoma for voltage at the correct times.

The brown wire is a ground so don't test that, but the blk/red wire should have power all the time, the red would be for the brake output so it should not have any voltage, and the green/white should only have voltage when the brakes are applied. This wire is most likely where your problem is.

If the wiring checks out then the problem is most likely internal to the controller.

expert reply by:
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Jameson C

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