Under GM,GM FI,(81-95),Component Tests,ICM/CKP/CMP Sensor,3.8L VIN 3/B,CMP Sensor,Tests,Frequency Test,Press Y for Connector, If you have had your Vantage in front of you and followed this "mapping trail", why does it list wire 'H' as ICM +10V and wire 'N' as ... Login to read more.