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The combination/proportioning valve contains two separate sections, these valve(s) are threaded into the master cylinder.
Here are some other components.
ELECTRONIC BRAKE CONTROL MODULE The module is located at the front of the center console.ANTILOCK VALVE (Dual solenoid electrohydraulic) The valve is located on the front right side of engine room.SPEED SENSOR/EXCITER RING The sensor and exciter ring are located on the rear axle carrier.REAR WHEEL ANTILOCK (RWAL) WARNING LIGHT The light is located on the instrument panel.