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

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This procedure only needs to be carry out if the 4-wheel anti-lock brake (4WABS) hydraulic control unit (HCU) has been installed new.

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: Filling Brake Master Cylinder Reservoir
Courtesy of FORD MOTOR CO.
Connect a clear drain tube to the RH rear bleeder screw and the other end in a container partially filled with recommended brake fluid.

Fig 2: Connecting Clear Drain Tube To RH Rear Bleeder Screw
Courtesy of FORD MOTOR CO.
Have an assistant pump the brake pedal and then hold firm pressure on the brake pedal.
Loosen the RH rear bleeder screw until a stream of brake fluid comes out. While the assistant maintains pressure on the brake pedal, tighten the bleeder screw.
- Repeat until clear, bubble-free fluid comes out.
- Refill the brake master cylinder reservoir as necessary.
Tighten the bleeder screw.

Fig 3: Tightening Bleeder Screw
Courtesy of FORD MOTOR CO.
Repeat Steps 3- 5 for the LH rear bleeder screw, the RH front bleeder screw and the LH front bleeder screw, in that order.