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Home >> Ford >> 1991 >> Bronco 4.9 Y, Standard, M5OD-R2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 51, Check C1, C2 & C3 At EDIS
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Test 51, Check C1, C2 & C3 At EDIS

Turn key off, and disconnect ECA. Set DVOM to 20-volt scale. Turn key on, but leave engine off. Measure voltage between breakout box pins No. (-) J7 (BAT -) and J3 (C1), J7 and J6 (C2) and J7 and J10 (C3). If each voltage reading is greater than 10.5 volts, go to next test. If each voltage reading is less than 10.5 volts, repair open circuit. Remove all test equipment, and reconnect all components. Clear Continuous Memory, and check for fault codes.