Thread: Battery issues
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#19: 10-25-2012, 03:47 PM
 Scooby Fan
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Originally Posted by LGT612 View Post
The time consuming way to find a parasitic draw is to hook up an ammeter to the battery, negative side cable, and start pulling fuses and see if the reading fluctuates.
One thing I find odd is that when I do the neg side amp test (Done it about 6 times so far) the readings fluctuate rapidly but never higher than 18 mA and usually more like 6-7 mA...very low for these cars ....never settles to a steady draw. I would have thought that it would settle down to a steady low draw down ...or if there was a short somewhere then it would be a steady higher reading.........that just never happens.
According to the Subaru bulletin anything over 150mA is BAD and anything less than 20 mA is optimal...they do not mention whether it should be steady or not.