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Mark Taylor
Join Date: Jun 2006
Location: Kingsport, TN
Posts: 14
Battery discharges overnight

Greetings fellow Porschephiles, I searched the forum hoping to find an answer to my current issue with my 2000 996 C2 with 123,201 miles. It has killed 4 batteries since Dec. 2017 and I need to find the cause before I take the last battery back for a warranty replacement. I'm five weeks out from back surgery and won't be released to lift anything heavier than a gallon of milk until after Sept. 18. but I'd like to solve the problem before then if possible. Has any one had this issue and solved it, if so I'd love to hear the fix, and any and all input is welcome.
C. Mark Taylor
Old 09-01-2018, 06:57 AM
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JFP in PA's Avatar
Join Date: Aug 2010
Location: Earth.............
Posts: 2,157
You need to test your electrical system for parasitic draws; requires putting a digital multi meter between the + post on the battery and the cable, letting the normal draw fall off (1 hr.) if you see more than 40-60 milliamp's, you have a drain. Then you pull one fuse at a time until it drops into range. Last fuse pulled is the circuit with the drain on it.

Good luck.
Accrochez-vous bien de vos rÍves..........."
Old 09-01-2018, 11:56 AM
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