this seems like a common problem lately

anyway, i checked all connections , etc, and all wires are seperated right up until the amp. i sanded even more paint.
im lead to believe it is one or both of two factors:
1. my rear deck is not the most solid ground point
2. my ground wire is just over 3 feet long, and that seems a bit legnthy.
thats why im looking for a ground point that is good near the middle of the trunk floor, to solve both problems at once