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Home >> Ford >> 1990 >> LTD Crown Victoria S, 5.8 G >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 5.8L >> Computerized Engine Controls >> Control Unit >> Power Circuits
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Power Circuits

Using a voltmeter, check for battery voltage between ECU terminal 20 and ground. If battery voltage is not present, check Blue fusible link. If fusible link is okay, check for an open in wire to terminal No. 20 on control unit.