Call your dealer. First thank them for doing a good pre-delivery inspection. Then ask them to walk you through hooking it up. A service tech should have no problem with this. The fan runs on
12v DC so your not going to electrocute yourself hooking this up. Just need to put the correct wire in the correct spot.
Never fails to amaze me the stuff that gets overlooked. We have been very lucky with both of our new Airstreams as we have had no problems. Good luck and Happy Travels.