Section 27 (Anti-Lock Brake System - Rear): Operation: Notes
WARNING: This page is about a different car, the 1995 Suzuki Sidekick. However, it is still accessible from the selected car via links, so may be relevant.
The RWAL ECM continuously monitors various input signals to determine control of pressure limit valve and BRAKE warning light. Available input signals include wheel speed sensor, stoplight switch, pressure differential switch (located on proportioning/differential valve), monitor coupler signal (diagnostic test), parking brake switch and 4WD switch (if equipped).