If the current vent doesn't have a fan, then no there isn't any "pre wiring" done. You'll need to find 12V somewhere. Ceiling lights are popular but you need to check for switched or constant hot depending on your preference.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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