I have a 2003 f150 I'm installing a new DBL din head unit, the one i'm pulling out is a single din after market head unit, I wired up the harness and the unit would not turn on, i double checked everything and have power and ground up to the connections of the wire harness I plug it in and there's nothing, I decided to wire up the old radio I removed and now that radio has no power, I would appreciate any idea's.....Thanks!! Jay

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    How are you checking for 12v power? Sure sounds like either blown fuse or hard shell push out. A push out is where an electrical connector isn’t properly seated inside a plastic hard shell connector. – zipzit Sep 24 '18 at 3:32
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    @zipzit you should write this as an answer, the only other possibility is a duff unit, but given the old one now does not work your answer holds... – Solar Mike Sep 24 '18 at 5:12
  • To OP: Welcome to Motor Vehicle Maintenance & Repair! – Pᴀᴜʟsᴛᴇʀ2 Sep 24 '18 at 12:39

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