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Home >> Ford >> 1991 >> Explorer 4D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 43, Check For Saw Short To VBAT In Harness
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Test 43, Check For Saw Short To VBAT In Harness

With key off and ECA disconnected, set DVOM to 20-volt scale. Turn key on, but leave engine off. Measure voltage between breakout box pins No. (+) J45 (SAW E) and (-) J7 (BAT -). If voltage is less than 0.5 volt, repair short circuit. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes. If voltage is greater than 0.5 volt, go to next test.