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Home >> Toyota >> 1991 >> 4Runner 2D Utility, 3.0 V, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Brake Light Signal

Brake Light Signal

The brake light switch is used to detect when the vehicle is braking. This signal is sent to terminal STP of the ECU.