Parked on an incline and vehicle cut out during three attempts to pull off in first gear and suddenly the vehicle is drifting backward with no braking at all, and pedal locked in the up postion. Can duplicate! with key in ignition and engine off, brake pedal locks in up position and braking system will not stop vehilce. Without key in ignition manual braking works! with key in the acc postion, and vehicle not running, power brakes locked in up position and no braking possible!!! turn key off, take key out of ignition, and manual braking stops vehicle!! power braking appears to disable manual braking, even with power brake inoperable due to engine being off, either turned off or conked out!!

- Annapolis, MD, USA