Just picked up my IROC and was wondering if you guys could shed some light on the symptoms my car is displaying. First, when I turn on my signals left or right the voltmeter bounces/drops when the signal illuminates. Second, my kick panel lighting and dome light do not come on when I open the doors. The car has an alarm system installed that is operational but im thinking about having a new one installed. I have also noticed that I get engine noise when listening to FM/AM on the radio. Does this mean I have a ground not attached properly? Any help would be appreciated.

Thanks