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current draw on stopped car


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2005 Outback about 100K.  standard engine auto.  When just sitting there I get around a half amp draw from the battery.  pulled all fuses inside and engine compartment with an ammeter attached to monitor draw.  NOthing.  except back up lights showed slightly less draw.  Any thoughts on usual problems with this car.  best place to look for possible slight ground?

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Make sure you've let the thing sit long enough for the computers to shut down. 30 mins should be long enough. Your back up lights shouldn't be drawing anything key off, but if that doesn't drop you down below 0.050A, then it's not your main issue. I'd agree with the alternator, try pulling the connector and the charge wire.

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pulling the battery cable fully discharges all systems.

 

Reconnecting via a multimeter causes a large ramp up draw for computers and electronics right?

 

So maybe you're just seeing that initiliazation draw rather than nominal draw?

Edited by grossgary
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Are there any custom installs or electrical work done? Phone charges, 12 volt recepticles, stereo, remote start, car alarm, DVD, lighting, custom HIDs, etc.

 

Or any components not working correctly or intermittently? Any recent repairs before this stated?

 

Those are common areas with issues.

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