simonlenihan wrote:This is incorrect, you MUST connect it to the IGN wire, as this is what powers the immobilisers if they are on board. Even if it is refered to as the ACC wire, always connect it to the IGN wire.
Uniden call it the IGN wire, as do Mongoose, Dynatron, Meridian and most others.
AVS call it ACC but it should still be connected to the IGN wire.....
It doesn't matter. You should connect it to and ignition based wire all the time. But even if you hook it to an accesory line it just means the car will start properly then cut out as the key is return to the "on" position and the ACC wire comes live again...
A lot of immobilisers nowadays are ground (activated) through the alarm and gain their power feed from the circuit they are cutting out. Therefore it doesn't matter where the sense/acc wire is, as long as power is trying to be sent to the circuit to be cut the immobiliser is on. That's how mine are arranged...