now that i look at it, i don't think you can unlock off the ignition. cause the ignition wiring only draws power when you turn the key in the on direction. so unless there is a way to direct power when power is being turned off, i'm screwed.
the e-brake idea sound good. one wire. gets power when you pull it. redirect that power to the door locks and viola!!!
Right? some one tell me what i'm doing!