not sure if there is a separate fuse for this circuit, but might check it,,,,, also,,the console switch is notorious for getting dirty and not making contact. Does it work with the key-switch ? If not, check for loose or corroded connections and grounds in the tailgate. Mine had some loose weather stripping on the bottom of the gate and was letting spray get in from below during wet weather. I snugged that up , and the problem went away in a day or two,, after it had time to dry out.
Hope this helps,
Mike