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Hey Guys, There Is An Easy Way Though Unclear About How To Override The Nav System After Starting Up So You Can Use It While Driving, It Used To Be On The Volume Screen With Hidden Icons, But Maybe The 2008 Has Changed. It Is Crazy To Rewire I Believe, So If Any One Has The Secret Code That You Punch In, I'd Rather Punch In A Code Everytime I Leave My Garage, Thanks....mike
 

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There is another thread here with a harness and switch from Japan that connects between the NAV and existing harness that accomplishes all that the wire cutting does.
 
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