Here's a better diagram that also shows the Entegra wiring:
Also, have you noticed any other things that are ignition powered that aren't working with the ignition on? Like the dash blower fan, or the mirrors? If so the problem may be the IGN solenoid in the toll window compartment (cylindrical silver thing with 4 electrical connections). It supplies power to the entire fuse block labeled "12V IGNITION B+" which has the IGN fuse for the steps.
Failures of that solenoid are common. I think your 2016 CS still used it.