Park Avenue V6-231 3.8L VIN L SFI (1993)
Brake Fluid Pressure Sensor/Switch: Description and Operation
Brake Distribution Valve & Switch
Fig. 16 Brake Distribution Switch. Normal
Fig. 17 Brake Distribution Switch. Failed
DESCRIPTION
This switch assembly is used on some diagonally split brake systems and Corvette four wheel disc brake systems. It is connected to the outlet ports
of the master cylinder and to the brake warning lamp and warns the driver if either the primary or secondary brake system has failed.
OPERATION
When hydraulic pressure is equal in both primary and secondary brake systems, the switch remains centered (figure 16). If pressure fails in one of
the systems, the piston moves toward the inoperative side (figure 17). The shoulder of the piston contacts the switch terminal, providing a ground
and lighting the warning lamp.
