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Home >> Mercury >> 1993 >> Tracer LTS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - EEC-IV >> Circuit Tests >> Circuit Test KF - Low Fan CTRL (LFC)/High Fan CTRL (HFC) >> Code 563

Code 563

Measure resistance between breakout box HFC test pin and HFC terminal at HFC relay wiring harness connector.