Can anyone tell me what wire is the VSS wire at the factory Head unit.  The HU is a Pioneer AVIC-XD1307ZF  for Lincoln MKX.  It has a 24 pin connector, 16 pin and 4 pin connector plugged into the unit.  I know it is not in the 4 pin connector because when I unplug it the GPS still has speed sense.  Unplugging any of the other connectors shut the unit off.  I am not trying to grab VSS just from anywhere.  I need it at the HU to bypass NAV while moving.

 

 

 

 

Thanks