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Ford
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1990
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Bronco II 4WD, Standard, M5OD-R1
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes
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Test H - Fuel Control
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Test H: Step 14
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4-Wire HEGO Sensors
4-Wire HEGO Sensors
Connect DVOM between HEGO SIGNAL and HEGO GND at the HEGO sensor connector.