Brake Pressure Input
WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
Circuit No. 933 runs from the pressure switch on the hydraulic unit to pin B1 on BCM connector No. 2. The pressure switch will open if pressure drops below 1500 psi (10,350 kPa). Pressure switch will automatically reset when pressure reaches 1900 psi (13,100 kPa).