Follow the quick start guide to connect to SavvyCAN.
This should be done while A0 is powered on but not connected to a vehicle, such as through the USB cable.
Go to Send Frames->Fuzzing, click start fuzzing and then stop fuzzing to send random CAN frames.
Back in the main window, the frames sent by fuzzing should be listed.
After this step you're ready to move your A0 to a vehicle and connect to it using the same steps as above (you may want to enable Listen Only to avoid any accidents at first).