For
@Jordanp from the 8.4 Upgrade thread,
From the
AlfaOBD Thread OP for "
Known working codes" Link...
(Connect to BCM -> go to "raised hood" icon -> Car Configuration Change )
Vehicle Configuration 3: HVAC Configuration:
Select:
Dual Zone ATC
Disconnect AlfaOBD app & shut off the truck for a few minutes and you must wait for the Dual Temp sliders to display on the 8.4 radio before proceeding with single zone ATC change.
(Battery disconnect or pulling the 20A inline radio fuse near the brake booster ... between these changes can speed up the radio/BCM reset for changes,
especially with a UAQ/UAS radio (think 15-30mins). * Radio is not reset until XM button displays again and/or Backup Cam works if installed)
Select:
Single Zone ATC
NOTE: your original config would be "Single Zone MTC"
Additional how to videos by
@big daddys house
AlfaOBD: Full Video Tutorals (Step By Step)