Hey guys, I just installed a new pa system, however, the system stays on even when the car is off. I was wondering which fuse is an accessory fuse that will turn the pa system off along with the car. Any help would be appreciated. Also I have a 2010 mustang. Thanks.

 

You'd wish to use a relay then. The SJB (smart junction box) ones (that's basically the internals of the fuse panel btw) are low amperage. So using it to switch it is fine, but just don't run off of it to actually power the PA system.

You could use F6 which is on the delayed accessory relay, the same as the audio system, windows, and such(5 amps total is all it is rated for). Just double-check with a Multi-meter. Power should go out on the fuse once you turn the key to the off position AND you open a door(or wait 5 mins). I'm unsure as to the complete validity of the linked manuals for 2010's. So you'd need to double-check.