S90 battery runs down when parked for 3 days
My Dad is bringing his S90 over for me to try so sort out an electrical short that discharges the battery when parked for 3 days. He says the battery and charging system and starter tested fine. He just doesn't want to spend the money for a shop to do the diagnosis (he's 87 years old and frugal!). I'm not familiar with this car and will start by checking for current drain across fuses for circuits that should be open with the ignition off. Anything subtle I should look for elsewhere. Auto electrical diagnosis is not my strong suit, but I'd like to help my Dad if I can.
Thanks!