So i had the HU out today swapping wiring harnesses. Well i hooked it up and it worked. I was sliding it into the dash and hooking up rca's from amp and one of the rca's hit the body of HU. It blew the fuse so replaced it. Now i don't have constant power into harness. I checked every damn fuse in fuse block in car and under hood, no blown fuses. What else can i check? I am completely confused on this one.