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Registered
Join Date: May 2002
Location: Santa Barbara, CA
Posts: 4,821
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The box will have to release a spark when the terminal with the arrow is shorted to the housing of the box (GND). Regardless of the condition of the points. The points are a switch, one side at GND, the other side goes to this terminal.
The other terminal on the other side goes to the coil primary. Be careful, there can be HV present even when there is no spark.
And as you said correctly, the center wire is +12V switched by the ignition. And GND goes to the spade on the housing.
Ingo
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1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430
I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs
Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!!
How about a NoBadDays DualChip for 964 or '95 993
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