Normal Operation
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The brake pedal switch has 12 volts when the ignition is in the ON position. When the brake is applied, voltage to the ABS module is removed.
This normally closed switch is powered by the SJB on circuit 601 (LB/PK) and feeds the ABS module on circuit 535 (LB/RD).