My body man knew how to do it. You run the window down and hold it for 10 seconds. Then run the window up and hold for 10 seconds. Run the window down once more and hold it for 10 seconds. You’re done. You will have to do this every time you have a complete power loss. Sometimes a complete power loss will confuse the computers. Things will stop working or you’ll get a bunch of erroneous fault codes. Take the HOT cable off the battery and touch it to the negative post for 10 seconds. This will force ALL the computers to reset to factory specs.