[blackwood]

Another thing you could try is adding a new wire between the 'trigger' wire coming off of your screen/head unit, and running that to the back and connecting to the blue/black reverse light wire.

Without an owner's manual, I don't really know how your specific head unit/screen handles knowing whether or not the reverse condition is being met. Maybe yours doesn't actually connect to the CANBUS like others do, and connecting the 'trigger' wire is required even though it's an automatic.

For my unit, I would have to change the 'Reverse Condition' setting if I switch from using that 'trigger' wire or not, so I'm not sure if after you try attaching the trigger wire, if you will need to change anything software wise, but this is another thing to try.