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you could do this. with voltage applied they are closed. you may have to add a diode in the mix so you are not feeding voltage back to the ECM or what ever source controls the flap.
if you put a diode in the wire that controls voltage to the flaps then tapped the other side of that with a 12v wire in your third position of your switch you would force them closed witout feeding 12v back up the wire that originally controled that flaps. I do not know if feeding 12v back up that circuit would cause issue or not but I usually don't risk stuff like that.
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2016 2SS
2020 super duty on 37's
Last edited by hognutz; 08-23-2012 at 10:07 AM.
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