When my volume levels reach about 30 (on the dial) the radio shuts down and restarts. I'm not sure if it is a ground issue or lack of power when it reaches this level. This is the second JVC deck that has done this. I will double check the wiring tomorrow, and yes I'm using a wire harness (kinda idiot proof . Has anyone run into this situation before? Its just a standard deck (200 watt, 50/channel) w/harness plugged into the sunfire harness. Rear speakers are Pioneer 220watt 3 ways, front speakers are factory i believe. its the wifes car, its more than enough for her (well maybe i can upgrade the front speakers).