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Home >> Ford >> 1990 >> Festiva L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test Procedure >> Analog Volt/Ohmmeter (VOM)
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Analog Volt/Ohmmeter (VOM)

Disconnect and reconnect the jumper wire from Self-Test Input (STI) pigtail to ground. Turn ignition on. Record displayed codes. Erase codes and repeat test procedure to ensure all codes are currently valid. Service only those codes which appear during the re-test. Refer to SERVICE CODE REFERENCE  to find the appropriate CIRCUIT TEST.