Alright well I got a new headunit and first it wouldnt play my car speakers that were connected to it, only the subwoofer played. Now the headunit wont turn on and when i connect it it blows my under the hood fuse for audio. When this doesnt happen, the fuse in the hu blows. I tested my speakers/ground/power with a dmm and there are all right. I cannot figure out whats going on. I had a 2001 hyundai tiburon and one amp to my sub, 4 speakers in the car running off hu. I had no problems before.