Mike's Workshop Manuals
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Jeep
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1989
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Grand Wagoneer
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Repair and Diagnosis
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Engine Performance
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Ignition System
Ignition System
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Description
Notes
Micro Computer Unit (MCU)
Electronic Ignition Control Unit
Testing
Secondary Spark Voltage
Spark Plug Required Voltage
Ignition Coil Resistance
Primary Resistance
Secondary Resistance
Current Flow
Coil Primary Circuit
Control Unit & Sensor
Control Unit Power Feed
Centrifugal Advance
Vacuum Advance
Overhaul
Distributor