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REAR ANTI-LOCK BRAKES COMPONENTS RABS Module RABS Valve RABS Speed Sensor RABS ABS Warning Light RABS Diagnostic Connector RABS Diode/Resistor Element RABS Sensor Test Connector RABS MODULE Usually located inside vehicle. Senses wheel speed other inputs Controls RABS valve and warning light Performs selfdiagnostics Single Channel WHEEL SPEED SENSOR Located in Rear Axle Provides signal in form of AC Voltage Direct input to Module Excitor Ring and Sensor Pole Piece LAB PAGE 159 CLASS PAGE 163 WHEEL SENSOR Voltage Generator Air Gap (.050) Magnetic Field around the coil Exciter Ring interrupts the magnetic field Sensor Test Conn. RABS VALVE Page 191C Two Solenoid Unit to open or close hydraulic circuits Inlet/Isolation Valve Outlet/Dump Valve Built in accumulator OPEN AND CLOSED ABS SYSTEMS Description Page 181C RABS DIAGNOSTIC CONNECTOR Ford RAB systems have no diagnostic memorys for codes. Usually single terminal connectors Flashes Amber light Ground terminal to activate self test FLASHOUT CHART - L232 DIODE/RESISTOR Located in main harness under dash Isolates RAB module from parking brake switch THE END