About an hour ago I was looking out the window and saw my parked car's (no keys in the ignition) exterior lights flickering off and on. I turned on the car and it started and ran just fine, normal. When I turned it off again, the fan would kick on and run for a few seconds, then turn off again and the exterior lights would blink off and on. Also, the oil light on the dash stayed on and flickered while the keys were out of the ignition. Any thoughts?