Yes, you can still use your accessories. All program settings are stored on the controller and therefore, any switchboard automated settings will still continue to function (i.e. spotlights on with high beam). Any air operated accessories (i.e. air locker and air suspension) automatically activates the compressor without the need for switches. However, for Air Lockers to operate without the Display, original Air Locker switches will need to be fitted as a backup.