Four Wheel Anti-Lock Brake System (4WABS) Hydraulic Control Unit (HCU)

NOTE: This procedure only needs to be performed if the 4-wheel anti-lock brake (4WABS) hydraulic control unit (HCU) has been replaced or if air is suspected in the HCU.

Clean all dirt from and remove the brake master cylinder filler cap, and fill the brake master cylinder reservoir with the specified brake fluid.

Fig 1: Locating Brake Master Cylinder Filler Cap & MAX Fill Line
Courtesy of FORD MOTOR CO.
Connect a clear waste line to the RH rear bleeder screw and the other end in a container partially filled with recommended brake fluid.

Fig 2: Connecting Clear Waste Line To RH Rear Bleeder Screw
Courtesy of FORD MOTOR CO.
With the RH rear bleeder screw open, cycle the brake pedal until no more air is seen in the waste line.
Tighten the RH rear bleeder screw, and disconnect the waste line.

Fig 3: Disconnecting Waste Line
Courtesy of FORD MOTOR CO.
Repeat Steps 2, 3 and 4 for the LH rear bleeder screw, the RH front disc brake caliper bleeder screw, and the LH front disc brake caliper bleeder screw, in that order.

Fig 4: Tightening LH Rear Bleeder Screw
Courtesy of FORD MOTOR CO.
Connect the scan tool DCL cable adapter into the vehicle data link connector (DLC) under the dash, and follow the scan tool instructions.

Fig 5: Connecting Scan Tool DCL Cable Adapter Into Vehicle Data Link Connector
Courtesy of FORD MOTOR CO.
Repeat the system bleed procedure as outlined in Steps 1 through 5.