interesting, as I just noticed our son's rockwood signature ultralight has the front vent, with no fan, but it certainly has some 12v wires showing there. I imagine it's run for the fan, if the owner wants to add one later... if you remove your vent you'll probably find it.
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The Turners...
'07 Rockwood Signature Ultralight...
two Campers and two Electric cars : )
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