Would like diagrams Auto Temp Control?

Hello Kevin, here is the HVAC wiring diagrams and a guide to help with the testing:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Let us know if you need anything else.

Awesome! These ATC'S :-(

Yep, they can give troubles for sure, let me know what the problem was if you can :)

Hi Ken L, The wire diagrams are very helpful, thanks! Looking for info specific to the pcb components, aspirator motor and the rest. Need to troubleshoot what fails. Don't believe its a BCM issue. ATC has no relay. Rabbit hole...I know. If you can help, great, if not, that if fine, also.

Sure, I will help you, the first thing I would do is a CAN scan to see what codes are stored, please go over this video which should help us retrieve the codes.

CAN SCAN - https://youtu.be/u-4syLc-ifQ

Let us know how it goes.