Quote:
Originally Posted by mthomas58
what was frustrating was we could not pin down the exact car model years however they seemed to come
about with 86+ cars and randomly. We could dive into the factory circuit but there was not much help.
Since we knew excessive voltage was the culprit we asked clients to review the battery voltages and came across a few that
had high voltage problems,
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I think Porsche back in '86 knew they had some circuits that were susceptible to voltage spikes. Hence the mysterious '86 year only diode in the parking light circuit, which was discussed in a post of mine way back in 2001!
http://forums.pelicanparts.com/porsche-911-technical-forum/10069-help-strange-parking-light-electrical-problem.html