Why isn't my PowerTap computer showing watts? Ensure the hub is awake by spinning the rear wheel. Perform a "find"� on the on the Joule/Joule GPS by pressing and holding the "+" and "-" buttons for 3 seconds. Spin the wheel to wake up the PowerTap. Zero the torque (see our video instructions for Joule GPS and Joule). 0 Comments Article is closed for comments.