I recently became the owner of a 1997 volvo 960. The car has been in storage for some time and only has about 57k miles. The car was properly maintained during this time. I am hearing a noise that sounds like its coming from the passenger headlight area. Its almost a constant grumbling noise. This happens when the key is in the on position always you can hear this noise when its cranked., The check engine light just came on today. Does anyone have any ideas what this could be? Ive tried looking at the schematics but I cant find anything that it would be.