My head unit has long since died (93 max), I still have it if anyone wants it, and I have a decent kenwood tape deck but I also have a cd changer in the system. I have the power and ohm/wiring adaptor and it won't even turn on without a new ground so I ran a separate ground to the battery.

Bu my porblem is that anything I turn on, the wipers, hazards, or defrost, the FM channel starts buzzing. And on AM I pick up the car noise as just more static or when I'm going its a whine. But when I turn the car off, it's perfect

I did try removing the system grounds wires from my new one and it sounded even worse.

Am I missing something?
thanks

 

Start moving your grounds around until you resolve the problem. More details on the system would be needed before anyone can really diagnose the issue.