Operation CHARM
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Ford Truck
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2004
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F 550 4WD Super Duty V10-6.8L VIN D
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Repair and Diagnosis
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Lighting and Horns
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Daytime Running Lamp
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Testing and Inspection
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Pinpoint Tests
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Test C
Test C
PINPOINT TEST C: THE DAYTIME RUNNING LAMPS ARE ON WITH THE IGNITION SWITCH OFF
Test C1-C4:
