The rear window defroster would be easiest but I'm not sure if it has 12V constant or switched power. You could even wire a splitter, and source the male/female plugs from Porsche. For the designs, I really like 'PORSCHE' along the bottom, because you would still be able to see out the rear view mirror.
EDIT: The defroster plug wiring harness is about $15, PN 986 612 081 01, likely a VW or Mercedes plug.
EDIT 2: The wiring diagram for the rear defroster plug is EWD-24 for MY '98-'00, two wires, brown and grey/green. Brown is obviously the ground, however the power (GN/GR) looks to be switched power.
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1999 Ocean Blue Metallic Boxster - blueboxster.com
Last edited by rick3000; 11-09-2014 at 11:47 AM.
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