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Home >> Ford >> 1991 >> Explorer 2D Utility, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 16, Check VRS Amplitude At EDIS Module

Test 16, Check VRS Amplitude At EDIS Module

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With key off and ECA connected to breakout box, disconnect diagnostic cable negative lead from battery negative terminal. Set DVOM to 20-volt AC scale. Crank engine, and measure voltage between breakout box pins No. J35 (VRS+ E) and J48 (VRS E). If settled voltage is greater than 0.4 volt, go to TEST 46. If settled voltage is less than 0.4 volt, go to TEST 25.

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