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Message: <blockquote data-quote="Nightmare" data-source="post: 1150835" data-attributes="member: 17421"><p>Ok, a little background.  I have a 2004 Mustang Gt.  I just swapped in a cluster from a 99 cobra and I had the pats system reprogrammed.  Th ecluster works great, however one issue did surface.  The rear defrost comes on and stays on, will not turn off.  I looked at the diagrams for the wiring and noticed that on both the 99 and on the 04 they are grounded to the cluster, however it makes no sence to me why I would be having this issue.  Put back in the oem cluster and the rear defrost operates like it should.  For the time being I have the rear defrost relay disconnected, however I would eventually like to have the defroster available if I need to use it.....Any ideas on this or has anyone ever experienced this who has done the same swap? I know that they moved the defrost button from below the headlight switch to below the radio, but I didnt notice any differences in the diagram..........</p></blockquote><p></p>