First you need to ensure that you have mapped the trim sensor potentiometer to an available general purpose input. Additonally you need to supply +5 volts through the trim potentiometer instead of +12 volts. There is a +5 volt pin on the EMS 37 pin harness pin # 18 which is also used for a MAP indicator. You should then be able to perform the trim calibration. After calibration if the trim indicator is not displayed on your Skyview you will need to go to the screen layout editor and add it.
