Hydraulic Control Unit (HCU): Removal

All Vehicles 

CAUTION: If brake fluid is spilt on the paintwork, the affected area must be immediately washed down with cold water.
1. Disconnect the battery ground cable.
2. Disconnect the low brake fluid warning indicator switch electrical connector.
   1. Pull back the tab.
   2. Depress the clips.
   3. Disconnect the electrical connector.
      Fig 1: Disconnecting Electrical Connector (HCU)

      Courtesy of FORD MOTOR CO.
CAUTION: The brake fluid reservoir cap must not become contaminated.
Fig 2: Removing Brake Fluid Reservoir Cap (HCU)
Courtesy of FORD MOTOR CO.
3. Remove the brake fluid reservoir cap.
NOTE: It will be necessary to carry out this step on both sides in order to completely drain the brake fluid reservoir.
4. Drain the brake fluid reservoir.
   1. Connect one end of a suitable piece of clear plastic pipe to the bleed nipple and place the other end into a suitable container.
   2. Loosen the bleed nipple.
   3. Depress the brake pedal until all the fluid is drained from the brake fluid reservoir.
   4. Tighten the bleed nipple.
      Fig 3: Tightening Bleed Nipple (HCU)

      Courtesy of FORD MOTOR CO.
5. Install the brake fluid reservoir cap.
6. Remove the air cleaner.
7. Remove the air cleaner outlet tube.
8. Disconnect the battery junction box (BJB) electrical connectors.
   Fig 4: Disconnecting Battery Junction Box Electrical Connectors (HCU)

   Courtesy of FORD MOTOR CO.
9. Remove the BJB retaining screw.
   Fig 5: Removing Battery Junction Box Retaining Screw (HCU)

   Courtesy of FORD MOTOR CO.
10. Detach the BJB from the BJB support bracket and position to one side.
    • Depress the locking tangs.
      Fig 6: Depressing Locking Tangs (HCU)

      Courtesy of FORD MOTOR CO.

    Vehicles With Speed Control 

11. Disconnect the speed control unit electrical connector.
    Fig 7: Disconnecting Speed Control Unit Electrical Connector (HCU)

    Courtesy of FORD MOTOR CO.
12. Detach the speed control unit.
    • Lower the unit.
      Fig 8: Detaching Speed Control Unit (HCU)

      Courtesy of FORD MOTOR CO.

      All Vehicles 

13. Disconnect the anti-lock brake system (ABS) module electrical connector.
    1. Release the retainer.
    2. Disconnect the electrical connector.
       Fig 9: Disconnecting Anti-Lock Brake System Module Electrical Connector (HCU)

       Courtesy of FORD MOTOR CO.
CAUTION: Cap the brake tubes to prevent fluid loss or dirt ingress.
NOTE: Make a note of the position of the brake tubes, to aid installation.
Fig 10: Disconnecting Brake Tubes From Hydraulic Control Unit (HCU)
Courtesy of FORD MOTOR CO.
14. Disconnect the brake tubes from the hydraulic control unit (HCU).
15. Detach the brake tubes from the bulkhead.
    Fig 11: Detaching Brake Tubes From Bulkhead (HCU)

    Courtesy of FORD MOTOR CO.
CAUTION: Cap the brake tubes to prevent fluid loss or dirt ingress.
Fig 12: Removing Master Cylinder To HCU Brake Tubes (HCU)
Courtesy of FORD MOTOR CO.
16. Remove the master cylinder to HCU brake tubes.
17. Detach the wiring harness from the wheelhouse assembly.
    Fig 13: Detaching Wiring Harness From Wheelhouse Assembly (HCU)

    Courtesy of FORD MOTOR CO.
18. Detach the HCU and ABS module assembly from the support bracket.
    Fig 14: Detaching HCU And ABS Module Assembly From Support Bracket (HCU)

    Courtesy of FORD MOTOR CO.
19. Remove the HCU to ABS module retaining bolts.
    Fig 15: Removing HCU To ABS Module Retaining Bolts (HCU)

    Courtesy of FORD MOTOR CO.
20. Remove the HCU.