So my amp went out, no sound, no lights on nav screen for sound, So I finally found the amp in the rear and unplug the power cable then boom amp works full sound light up on the nav screen. I think its fixed then turn car off and it doesnt work again, so I unplug amp power and works again. What should I do, its not a loose connection its more like a relay isnt working to turn on amp? anyone have some advice? Thanks