i have 2004 g35 coupe with the bose sound system. I have a subwoofer with a built in amp in the trunk, but the previous owner had the car already wired up for subs. OK the problem is when i turn off my car sometimes my sound system doesnt turn off. all music is playing and yet my key is out! well i can live with this because it happens every once in awhile and i can turn it off with the power switch. But it started happening when i hooked up my sub to the existing wiring. thanks in advanced for any help!!

 

So you have the Bose HU, but it stays on after you turn off the car?

 

yeah, but only sometimes. and i have the key completly out. its weird yo..
hasnt done it in a couple days.