I just finished installing my stereo system and when I turn the switch to the ignition position I get a hiss, high pitch noise, the stereo could be in any mode, cd,radio,pandora etc. Now when I turn the switch to accessories it doesn't make that noise. I am assuming to have a poor ground. but I have ran my ground wire from the amp to 3 different positions on the chasis and I still have the noise. does my alpine stereo has to be ground it also?? I am running the HUA 360 from Hawg wired and the RS400 from Hawg wired. I have wired the ground from the stereo to the HUA360 as per instructions.......any ideas??? Please help!!!!!