Bronco L6-300 4.9L VIN Y 1-bbl (1983)
EQUIPMENT
Obtain the following test equipment or an equivalent:
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Spark Tester, Special Service Tool D81P-6666-A. See note.
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Volt/Ohm Meter Rotunda 014-00407.
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12 Volt Test Light.
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Small straight pin.
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Remote Starter Switch.
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TFI Ignition Tester, Rotunda 105-00003.
NOTES
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A spark plug with a broken side electrode is not sufficient to check for spark and may lead to incorrect results.
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When instructed to inspect a wiring harness, both a visual inspection and a continuity test should be performed.
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When making measurements on a wiring harness or connector, it is good practice to wiggle the wires while measuring.
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References to pin-in-line connector apply to shorting bar type connector used to set base timing.
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This procedure is intended to identify faulty components or wiring while the fault is present. If the complaint is of an intermittent condition refer to
Intermittent Diagnosis.
Functional Schematic
TFI-IV
Closed Bowl
Distributor
The TFI-IV Closed Bowl Distributor system electrical schematic is shown below. For detailed information, refer to the vehicle wiring diagram.
Ignition Coil Secondary Voltage - Crank Mode
