Does anyone know if our door lock switches, window switches, mirror controls will work with only a 12 volt source and not all the computer crap?

 

The power window switches switch 12 volts for the window up/down.

The door lock switches are not on/off switches as such. There is a specific resistance value for each position and the CTM senses the change to lock/unlock the door.

The mirror switches are not shown in the schematic but they "should" be a group of on/off switch. You select driver or passenger mirror and then it is up/down OR left/right. I see no reason to suspect they control anything other than 12 volts.