Shaker 500 speakers buzzing
Stock Shaker 500 stereo & speakers in my 2012 started buzzing about 3 months ago. Cleaned negative grounds from battery and fuse box and thought I fixed it until last night when it started when I turned on the headlights, funny thing is if I turn on the bright lights it stops. The buzzing only happens only when the car is running; it buzzes on AM, FM, CD and Satellite radio even if the volume is turned to 0. I imagine it is a grounding issue but where do I go next. Replaced the original battery and had the alternator checked; the buzzing does not react to engine speed so I don't think it is the alternator.