[Scott]

Or you could run into the fun problem where someone bumped the wiring harness when putting folding chairs into the bay getting ready to leave. Then you feel pretty silly when you troubleshoot it for an hour just to have everything point at it being unplugged.

Tom had that issue when leaving Ohio, steps were stuck extended, pulled open the PDF specs on the step and starting probing the voltages.

Just pull out that voltmeter and double-check what it is before you start replacing stuff (trust, but verify!).