Pressure Switch: Notes
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1988 Buick LeSabre, 1988 Buick Electra, 1987 Buick LeSabre, 1987 Buick Electra, and 1986 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Before servicing any component which contains high pressure, it is mandatory that hydraulic pressure in the system be discharged. With ignition off, pump brake pedal a MINIMUM of 20 times using full pedal strokes. When a definite increase in pedal effort is felt, pump pedal 2 more times.