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Home >> Ford >> 1985 >> Bronco 4.9 Y, Standard, NP435 >> Repair and Diagnosis >> Engine Performance >> System >> 4.9L Feedback Carburetor Tests W/Codes >> Diagnosis & Testing >> Reading Self-Test Codes >> Notes

Reading Self-Test Codes: Notes

Service codes are transmitted to the Self-Test Output connector. They are shown as voltage pulses on a Volt-Ohmmeter (VOM), or as numbers on the STAR tester.