Try first to unplug the connector, this can give quick result if the disconnection will clear some errors. Best to reach is to take the wheels off. Then releasing the parking brake motor will make the wheels free.The next idea I have is to jack the car up and try disconnecting the brake motor, removing it if needed to see what changes. With the ridiculous price that the SC wants for the parking brakes, and I'm pretty sure their FIRST inclination is going to be to charge me / change both of them..... I'd rather find a solution that doesn't involve bending over and letting them play guess-the-failure with my credit card. So likely tomorrow I will try pulling the parking brake motors... Since it can't make anything any worse than it is now and I have the time until next week.