im trying to connect the door trigger wire for my 3105 viper alarm and from what i read there negative so i tried connecting the green alarm wire - on the green/yellow in the A pillar and alarm doesnt sound. i tried probing the maplight for a wire that goes + when door opens but all lit my test light up with door closed. i watched an install on motorz website and they say connect violet+ from alarm to green /yellow in pillar.im confused if the 2006 mustang has negative door trigger how can i get it to work using violet+ on triggers? appreciate any help.