Everytime i turn my truck on my h/u turns off for about 10 seconds and then turns off. And sometimes it doesn't turn on at all. The only way to make it work is to unplug the harness in the back and plug it back in. And when it does turn on, my subs give one little bump and then everything turns off; h/u, amp, everything. I checked all my fuses and my RCA's. Can someone PLEASE gelp me out here?