ACC line is the accessory line. You know when you turn the car on, the key has many positions?Quote:
Originally Posted by superart
Off -> AC -> ACC -> Engine Starter
So anyways, carputers have this thing called a shutdown controller. You hook this up to the ACC or AC line. When the car is on, the key is in the ACC position, and the SDC has the computer on. If there is no signal on the ACC line then the computer is off. Now I'm saying hook up a relay, and connect the line that was supposed to go to the ACC line to the relay. Then you'll be able to turn it on and off by your presense.