When I bought my car a couple months ago I installed a Pioneer AVIC head unit and 12" subwoofer. I wired everything up and it was working fine. However, I wanted to build a custom subwoofer enclosure since the trunk is so small anyway. Thus, I had to disconnect everything and reconnect. Now I'm getting REALLY bad noise. With the sub connected all I hear is "wawawa" constantly as soon as the remote wire turns ons. I tried switching the amp to the HPF mode for speakers to verify it wasn't my sub and its still really bad, although I can indeed hear music through the speaker (unlike the sub). Is it possible I somehow blew my amplifier partially? It still powers on with no warning lights/etc. I've tried two different grounding points, including the one that worked fine before. These are the bolts under the trunk mat toward the rear seat (the four bolts near the spare).
Any ideas? Thanks
