multimeter under your dash and see if your turn-key is being activated without your actual key being inserted.
Very rare, but sometimes the turn key switch wire gets loose, touches a bit of the metal and keeps the car "running" without the key.

New alternator, new battery, new voltage regulator, and still getting the problem.. Fuck.

And we will just go back to first page at this point and time.

Remove anythig aftermarket thats wired in. EVERYTHING. Test
If still there, you my friend have a gremlin and you need to take shit apart with your little tool chest and volt meter and check alll the wires, and anything that uses power when the cars running

Good idea to start with things thag draw more power, and the imediate wires off the battery first because it drains fast

/ and i dont know where you live, but dont let that battery freeze solid. It will be a ticking time bomb if you decide to jump or charge it and no warranty covers that ( unless you let it thaw and keep those cheeks puckered to hope for the best )

This post was edited by IB0T on Dec 4 2013 08:48am

rip the harness out and go threw that plate of spaghetti

have you ever noticed something weird like the parking lights come on when you press the brake pedal? or anything else weird that happens when you do something else?\

has the car always done this or did it just start doing it? also have you noticed any mouse droppings or other signs of field mice that mightve got in there and chewed on some wires?