Operation CHARM
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Ford
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1990
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F 150 2WD Pickup L6-300 4.9L
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Repair and Diagnosis
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Heating and Air Conditioning
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Testing and Inspection
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Heating System Diagnosis
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Insufficient Cooling, Heater
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A2: Check Compressor Clutch
A2: Check Compressor Clutch
Fig. 16 Insufficient A/C cooling diagnosis (Test A1, A2, A3 & A4). Light trucks:
