Chart C, Brake Lamp "On"
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
- This chart is used when the "BRAKE" lamp is on, the "ANTI-LOCK" lamp is off, no trouble codes are set and power assist system is operating normally.
- The "BRAKE" lamp turns on when one or more of 4 possible inputs switches the circuit to ground. The pressure switch on the hydraulic unit, the fluid level sensor, the parking brake and the brake pedal through the ignition switch all provide inputs. When any of these switches close the "BRAKE" lamp turns on.