need the wiring diagram for the vcm and the ecm
please help, I am not getting the 12v on the 3 wire also called the C wire ,I need to know were the wires are coming from.
Here is a link to diagram I have available for the 5.7. They are GMC but the same for the Chevy.
Looking at that wire(BLACK) I think it is the injector control wire and should send a negative signal to fire the Number 1 injector. The pink wire on the number one injector is what carries the battery positive supplied from the ECM-1 20A mini fuse.