2005 s40 battery drains has new alternator and battery 116k on clock. Where should I start to fix this? Did some googling and couldn’t find much info on this on the s40 thinking it’s a parasitic draw

 

It's not a difficult process, but it IS a little fiddly. First, you disconnect the negative battery terminal, and put an ammeter inline between the battery and the cable. That will show you how much current is flowing, and you can determine if it's enough to drain your battery (make sure your door isn't open, turning on the dome light).

Assuming you DO see excessive current drain (I'd say offhand anything over 1/10th of an amp) then it's "just" a matter of pulling individual fuses one at a time until you pull one out that causes the excess current to go away. Then you know where to start looking (it'll probably be pretty simple at that point to figure out which component is the culprit).

 

I’m going to do that was just kinda hoping there was a common issue. Hopefully an easy fix

 

yep, start measuring current draw across the various fuses - I'd start with low draw things like the interior lights (ie how do you know the glovebox light is off?), radio antenna etc - stuff that's not obvious if its on or not.