WARNING: This page is about a different car, the 1990 Oldsmobile Toronado, 1989 Oldsmobile Toronado, and 1988 Oldsmobile Toronado. However, it is still accessible from the selected car via links, so may be relevant.
Any electrical failure that prevents the main relay from providing switched power to EBCM pins No. 3 and 20 will prevent EBCM from powering up. The ANTI-LOCK light will remain on continuously.