gyan

My manifold is off & the CMP sensor is out. I've got 10.5V on the red with ign on, the pink/black (Low Ref) shows nothing & Brwn/wht (CMP Signal) never shows voltage when the tip is near metal or not, even when I provide a separate Grnd to the pink/black. Could it be the sensor? All seems weird to me.
Does anyone know if the PNK/BLK PCM pin C1 / 61 Low Reference Camshaft Position Sensor is a ground wire ?