im currently rewiring my whole system and noticed that the vss wire was not connected, my nav worked fine and everything was working but now that i have the deck out im thinking once i put it back in its not going to work right without the vss wire connnected.. seems like the alarm guy disconnected it idk, but now i have no idea which wire it is, i know when i installed it 2 yrs ago i connected it to a green wire, problem is alarm guy has some wire taps into green wires and theres more then one green wire.... any help???