Brake Switch Feedback
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Models equipped with cruise control systems may monitor the brake switch circuit and the cruise control release switch to determine when to engage and disengage cruise control. On vehicles equipped with a Torque Converter Clutch (TCC), the brake switch provides an input to the PCM to control the TCC solenoid located in the transaxle.