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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 26, Check VRS Resistance
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Test 26, Check VRS Resistance

With key off and ECA disconnected, connect EDIS diagnostic cable negative lead to negative battery terminal. Set DVOM to 20-k/ohm scale. Measure resistance between breakout box pins No. J48 (VRS E) and J35 (VRS+ E). If resistance is 2580-2700 ohms, go to next test. If resistance is not 2580-2700 ohms, go to TEST 28.