Ranger 2WD V6-177 2.9L (1989)
Ignition Control Module: Description and Operation
Thick Film Ignition Module
The TFI IV ignition module has six connector pins at the wiring harness that supplies the following signals:
Run
Crank (start)
Tach (coil)
PIP (crankshaft position to ECA)
Spark Output (SPOUT from ECA)
Internal ground from the ECA to the distributor
Ignition System
The TFI IV module supplies the spark to the distributor through the ignition coil and calculates the duration. It receives its control signal from the
Electronic Engine Control (ECA) Spark Output (SPOUT).
