And for a bottomline IMO, there is no substitution in shutting all secondary breakers off, read what it is suppose to be for, turn it on and check what is does power up, and does not power up. Have the DW writing everything down on a notepad while you investigate each switch.
It has been proven that the factory doesn't necessarily wire our cable/satellite/OTA properly to our VINs, so putting 100% faith on 120V nomenclature could be sketchy until after performing your breaker testing procedure, you know EXACTLY how yours is wired and labelled.