The Controller Anti-Lock Brake CAB (Mark 20T or Mark 25T) is a microprocessor-based device which monitors the Antilock Brake System (ABS) and the Electronic Stability Program (ESP) during normal braking and driving functions. The CAB controls brake pressure when the vehicle is in an ABS stop or if the vehicle is in a spin. The CAB is mounted to the Hydraulic Control Unit (HCU) as part of the Integrated Control Unit (ICU). The CAB uses a 47-way electrical connector on the vehicle wiring harness. The power source for the CAB is through the 50 amp fuse located in the Engine Fuse Block.