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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

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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