Passlock, 2004 Saturn Vue

So i have hooked up all the remote starter wires so far and i am going to put on the Xpresskit PLJX Passlock 2 bypass this weekend. I however have a question on something on the instructions. Diagram On the instructions it says "Connect this wire only if the vehicles keysense wire goes to ground when the doors are closed and the key is in the ignition" How on earth do i test for that? My 2004 Saturn Vue has a RED / White, ORANGE / Black and Yellow wire. Am i missing something else? I don't see a ground wire anywhere. Thanks for the help!

Here is the info on the Keysense wire :

Keysense      Lt. Green (-)    @ ignition switch harness

From experience, you will need to connect the Saturn Vue's Keysense.  Here is a note from ReadyRemote :

The Light Green key sense wire at the steering column must see a ground during remote start to keep

the SERVICE light from coming on. This wire is also found in pin A11, gray 24 pin plug at BCM.

The test mentioned in the PLJX install guide can be done using a Digital Multi Meter.  Set the DMM to 20V DC,

connect the Red test lead to +12V constant and the Black Test lead to the suspect Light Green Keysense wire found in the ignition harness.  The DMM will read +12V when the Keysense signal is present ( goes to (-) ).

The install instructions in the PLJX guide for Passlock2 are generic as they cover a wide range of vehicles.

Soldering is fun!

Thanks very much!