Operation CHARM
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Dodge or Ram Truck
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2009
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RAM 3500 HD Truck 4WD L6-6.7L DSL Turbo
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Relays and Modules - Computers and Control Systems
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Oxygen Sensor Relay
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Description and Operation
Oxygen Sensor Relay: Description and Operation
The 2007-2009 Ram Truck use an O2 module for oxygen sensor heater control.
Electrical Diagrams
Fuel and ignition.