1981 Bmw 320i Hi Attempting Figure Out Car Killing Batteries Conducted Ground

1981 BMW 320I
16,325 MILES
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hi i am attempting to figure out why my car is killing batteries i conducted a ground test where i disconnect the neg terminal and leave power connected testing for voltage drop and im getting 12.6 at the post and when i touch my ground anywhere else im only getting 7.5v im at a loss please help
Dec 11, 2012 at 11:46 PM
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HMAC300
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check for a draw, look on site under how to repair batteries item 9
Dec 12, 2012 at 12:02 AM
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