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Home >> Ford >> 1990 >> Cutaway 7.3 M >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Basic Testing) >> Electronic DISTRIBUTORLESS Ignition System (EDIS) 4.0L Engine >> Test 40, Check Saw At EDIS Module
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Test 40, Check Saw At EDIS Module

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1991 Ford Ranger, 1991 Ford RV Cutaway, 1991 Ford Pickup, 1991 Ford F-Super Duty, and 1991 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

With key off, set DVOM to 20-volt scale. Start engine, and measure voltage between breakout box pins No. (+) J21 (EDIS diagnostic cable SAW detector) and (-) J7 (BAT -). If voltage is 5-7 volts, replace EDIS module. If voltage is not 5-7 volts, go to next test.

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