ok so i have a Pioneer AVH-P4000dvd and was curious as to if there is any way to wire up my HU to stay on while my car is off...i hate that it goes off as soon as i turn my car off...i was thinking a switch maybe but i really dont know if this is even feasible...

thanks in advance!

You could probably just wire the head units power wire directly to the battery, but you will want to install a fuse and a switch.

ok so if i do that will the speakers still play tho?

Right now, the head unit is powered on by connecting the red power wire from the head unit to the ACC power on wire in the factory harness... this is either done through direct splicing or through an adapter... to do what you are trying to do, you would simply need to connect that power wire to the yellow "always hot" wire that goes directly to the battery...

your head unit may already havbe a fuse installed in the back of the unit, but if not, defniately install an in-line fuse.

and yes, you can hook this up to a switch, it may work ok as long as you don't have the bose system or any amplifiers installed... that may complicate things a bit... it may not, because most amps are turned on via a remote signal wire, but I've never exactly done this before so I'm not sure...

if ur gonna do this, I would replace the stock battery... that thing will die pretty quickly if ur stereo is running directly from it.... you need a deep discharge battery for what you are trying to do... preferably the Kinetik KHC 1800

You could push the Push-to-start button quickly twice and it will go straight into ACC and the screen won't go off.

aight sweet that works!!!

and yes i need a new battery so thank u for the advice!