Brake Warning System Circuit Description (Buick)

The BRAKE indicator located in the instrument cluster is controlled by the following components on circuit 33 (TAN/WHT):
^ When the ignition switch is turned from the RUN to START positions, the ignition switch closes and a low (ground) condition exists at C1 terminal E16 (CKT 33, TAN/WHT).
^ When the park brake is applied, the park brake switch closes and a low (ground) condition exists at C1 terminal E16 (CKT 33, TAN/WHT). If the ignition switch is in the RUN or Start-ART positions, the indicator illuminates. A chime sounds, when the body control module (MALL) detects this condition at C2 terminal D3 (CKT 33, TAN/WHT) and a VSS input at C2 terminal C15 (PNK).
^ When the brake fluid level is low, the brake fluid level switch closes and a low (ground) condition exists at C1 terminal E1 6(CKT 33, TAN/WHT). If the ignition switch is in the RUN or START positions, the indicator illuminates. A chime sounds, when the body control module (MALL) detects this condition at C2 terminal D3 (CKT 33, TAN/WHT) and a VSS input at C2 terminal C15 (PNK).