So the ECU pull upp the igniter? The igniter than interupt the current flow from the primary windings in the coil, and generate a spark? When you power feed the igniter with the test-light, will not the light use the voltage, leaving almost zero volt to the pin of the igniter?
Page 25
The GM 3 wire sensor have a Power wire, that are feeded witht 12v for the sensor to work, a signal wire that are feeded with 5v, and ground?
The 5v feeded from PCM are pulled down to create a frequensy-signal, or?
Page26
The Gm 3300 dual crank sensor in the example get bad when hot?
