So i've searched for hours and i cant seem to find someone who has had this same problem. I was installing an aftermarket head unit, i wired the harness's together and test it before putting it all back together. As i slide the unit into the dash, it flickers on and off two or three times, and then off completely. My old unit doesnt even work, nothing is working at all. What could this be? I checked the fuses none were burnt but i changed them anyway.