Ford Ranger Maintaince And Repair Manual page 187

System Test
1. Disconnect the pin−in−line connector near the ICM.
2. Crank the engine
3. Turn the ignition switch OFF.
4. If a spark did occur, check the PIP and ignition ground wires for continuity. If okay, the problem is
not in the ignition system.
5. If no spark occurs, check the voltage at the positive (+) terminal of the ignition coil with the ignition
switch in RUN.
6. If the reading is not within battery voltage, check for a worn or damaged ignition switch.
7. If the reading is within battery voltage, check for faults in the wiring between the coil and TFI module
terminal No. 2 or any additional wiring or components connected to that circuit.
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HOW TO USE THIS BOOK
ICM module resistance test 5 chart
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ICM module test 6 chart
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TEST PROCEDURES