Ok Too Late, I'm going take the Plung

[4jacks]

Yes, I was afraid the PIN was only the thing that makes the light come on..... but I do have a Trunk Output wire somewhere right ?? I have a trunk popper right next to my seat... that has to have a wire going to it... is their a way to trace that ??
And Yes I have 2 grounds... One Coming from the Alarm Unit and one on the Siren.

I dont have a digital multimeter, My dad may have one I can borrow... how do i use that ??