Truck keeps dying!!!!

[64Magoo]

Magoo keeps dying on me if I leave the battery connected for more than 24 hours with it off. I have most of the electrical (ie, battery three times, alternator, wiring, grounds, voltage regulator, etc.) I don't leave the lights on, my cigarette lighter and horn aren't even hooked up, yet there is a draw somewhere. I don't know if my turn signal is on (even though visibly it isn't) which would cause the leak? Anybody have a similar problem? The problem has gotten so bad I installed a battery quick disconnect on it which works great when I remember to use it!