Electrical Issue...surely this is connected

[HORN HIGH ACES]

well I replaced the sync 2 system with sync 3 and that fixed the issue for the screen not being responsive. That means it was the digitizer that went bad on the original system.
I got the sync 3 system from ebay, but this installation video was perfect.

The sliding rear glass was also fixed by replacing the physical switch on the ceiling panel.
Video and parts link here:

The rear glass defroster still does not work, but I think it's an issue with the connectors not getting adequate contact. Working on that one this week.

Can you provide a link to the system you bought on eBay?