Brad's Car Manuals
: A 3rd party mirror of CHARM + LEMON car manuals
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Cadillac
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1982
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Seville V8-252 4.1L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Relays and Modules - Ignition System
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Ignition Control Module
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Description and Operation
Ignition Control Module: Description and Operation
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PURPOSE
The "R" terminal on the 7 pin ignition module provides reference pulses to the ECM indicating engine RPM and crankshaft position.