Operation CHARM
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Ford Truck
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1988
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F 150 4WD Pickup L6-300 4.9L
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Repair and Diagnosis
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Brakes and Traction Control
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Antilock Brakes / Traction Control Systems
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Testing and Inspection
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Diagnostic Trouble Code Tests and Associated Procedures
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Manufacturer Code Charts
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4 - Yellow Antilock Lamp Flashes 4 Times
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4B - Short Between RABS Valve Switch and Valve Ground Lead
4B - Short Between RABS Valve Switch and Valve Ground Lead