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How to Find Stoplight Switch Circuit for Brake Controller Install on a 2004 Toyota 4Runner  

Question:

CAN YOU PLEASE TELL ME THE COLOR OF THE BRAKE SENSE WIRE FOR A 2004 TOYOTA 4RUNNER TO INSTALL A BRAKE CONTROLLER.? THANK YOU

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Expert Reply:

You are going to need to use a circuit tester like part # PTW2993 to test all of the wires going to the brake pedal switch to find the one that only sees 12 volts when the brakes are applied and none when they are released. That will be the correct circuit to use for installing your brake controller.

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Jameson C
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