You have no 12 volt?? You won't have electricity unless plugged into shore power. Need more information in order to be of any help.
If no 12 volt, your batteries are more than likely dead & your truck will charge them eventually, but if you've been on shore power they should of been charging unless you've turned the battery cutoff to store, then they won't til to You turn it back on.
Danny & Linda
Former '13 FB owner