I have a 2004 XC90 2.5 liter. It has sat for a long time due to needing a new brake master cylinder. I replaced that but now it has an issue with the ignition where when you shut it off and pull the key out, it acts like it's in acc mode, the ac fan still blows and the radio is on. Have to disconnect the battery to keep it from draining. Anyone know what would cause this?