We have an 2003 Outback Wagon and when you turn on the headlights the ABS light comes in. Last night we keft the head lights off and just used the druving lights as it wasnt dark yet, but when you hit the brakes, the dask board and radio lighting would dim. What would the cause be for this other than a bad ground? I have heard that an alternator can cause it but not sure. The ussues atarted all of a sudden. No prevoius issues. Original alternstor and car has about 145k miles. Thanks for your time.