2013 door sensor wiring for alarm
 

Hello,
I'm installing a Viper alarm and looking for the door sensor inputs.
The wiring diagram I have shows a gray/black wire for the driver's door ajar sensor and i've seen that color called out on another forum. However, there is no gray/black wire in the door harness. I unplugged the door harness and the dome light just stayed on with the door closed so I know it's in there somewhere but does anybody know what wire color it would be? Also how does it work as far as grounding goes. Thanks!
~Dan