A:AnswerThe blue wire needs to go to a power source that turns on when you turn the ignition on. You can take it to a fuse box and get a fuse tap to replace one of the fuses that turns on when the key is turned on.
A:AnswerYou'll need to find the left and right speaker signal wires to tap into and run to the sub speaker level inputs. Just add 12 Vdc and stuff it under the seat if it fits.