ABS pump motor and VMM inop. Any ideas? I recently changed the whole master cylinder assembly on my 92 SC. Owners manual says that to bleed the brakes, turn the key to the on position and have someone hold down the brake pedal. Fluid should come out of the rear bleeder valve under a decent amount of pressure. On mine there was no fluid coming out at any pressure and the VMM stopped working. Was told it could be the ignition switch. Any one ever hear of that?