Bringing this thread back to life since my Dodge Caravan also has the same noise that you described. So the ground loop isolator worked for you? I had mine installed professionally and plan to take it back tomorrow for them to fix this problem. The empeg also doesn't shut down when the van is turned off, it keeps on playing, so they need to rewire that also. Did you have this problem with your van?
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Laura

MKI #017/90

whatever