I found the easiest way to disable the ABS was to remove the black plastic cover on the top of the ABS pump unit. Requires a small torx tip screw driver or socket. Then I pulled the relay out. (The small silver one). This morning the ABS light came on and stayed on as expected due to the ABS unit being disabled. The symptoms in my first post went away. No grinding. No brake releasing. I am going to drive it some more to be sure, but it looks like a malfunctioning ABS system. Now to determine which wheel sensor is causing it. I too cannot believe the rear sensor would cause one front wheel to act up.