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.