Electronic Brake Distribution (EBD)
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The EBD controls rear brake pressure and acts as an electronic proportioning valve. It is controlled by the ABS module. When the EBD is disabled, the amber ABS warning indicator and the red brake warning indicator will illuminate.