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Message: <blockquote data-quote="pwnt by pat" data-source="post: 3554320" data-attributes="member: 556604">most newer cars have a "key in"line where as long as the key is in the ignition, the line will still have 12v.Other than that, get a two position switch and a relay.  Wire the center of the switch to the carputer remote line, wire position 1 on the switch to constant 12v, and wire position 2 to a relay post 85 or 86.  When the switch is in position 1, the carputer will remain on indefinitely.  When the switch is in position 2, the carputer will function with car acc as normal.</blockquote>

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