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Old 08-28-2007, 07:46 AM   #8
Tool Pants
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Join Date: May 2002
Location: San Jose
Posts: 1,889
If you can see the outside temp then the OBC is turned on.

Porsche sells dash switches. Most people who do the OBC retrofit with a switch use the footwell switch.

You also need to make a wiring harness from the switch to the instrument cluster connector. That is this picture.
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