Noticed when my son pulled the 325ci in this evening (only temporarily, he's racked up over 300 miles this week), the right low beam headlight was much dimmer than the left, almost out He had the fog lights on too, so asked him to turn the fogs off and the right low beam went back to normal. Does this sound like a light switch issue, need for a new bulb, or a grounding problem?
A couple of items I know of: it's a 2001 pre-facelift coupe, so no xenons, I think just normal halogens; the left headlight was replaced within the last year due to a rock hitting it; and, the bumper was removed and repainted not too long ago because there are no normal stone chips that an 11 year old car should have.
Ideas?