Static in speakers when headlights on

I have a 2000 Chrysler Town & Country LXi with an Infinity Stereo. Static comes from the drivers dashboard area when the headlights are turned on. No
static when the parking lights are on. Also, this happens regardless of stero volume or whether the radio or CD player is operating.
any ideas? Thanks.
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Either you may need a secondary ground from the headlights...or the ground wire from the battery may have corrosion on the terminal at the battery end, or the frame end, causing resistance thus causing the buzzing in the radio. Hope this helps! Sed

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