Ignition Control Module: Description and Operation

Fig. 34 Power Transistor and Ignition Coil:

PURPOSE and OPERATION
It allows the signal sent from the ECU (very low current) to activate the primary circuit in the ignition coil (much higher current). This induces high voltage in the secondary windings of the ignition coil, providing spark to the distributor cap and plugs.

LOCATION
On left fender apron.