W100 1/2 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Powertrain Control Module: Description and Operation
Electronic Control Unit
The Electronic Control Unit (ECU) is a solid state monitoring and triggering unit that receives ignition signals from the distributor that cause the power
transistor to switch off and on triggering the coil to fire.