B2300 SE Regular Cab 2WD L4-2.3L VIN A (1997)
3. If the brake pedal drops slowly to the floor, then replace the hydraulic unit.
Check Ground at Hydraulic Unit Harness Connector
1. Disconnect the hydraulic unit connector.
2. Check for continuity between terminal 3 of harness connector and chassis ground.
3. If no continuity, service the harness connector to ground.