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Home >> Ford >> 1990 >> F-Super Duty 7.3 M, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test P - Spark Timing Check >> Test P: Step 5
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Test P: Step 5

5) Check SPOUT/SAW Circuit For Shorts To Power (Except VREF)  Turn key off and wait 10 seconds, Install breakout box and disconnect ECA and EDIS or DIS module (pins No. 1-6). Set DVOM on 20-volt scale. Perform the following measurements:

If any voltage is less than 10.5 volts, go to next step. If any voltage is greater than 10.5 volts, service short circuit, remove breakout box, reconnect components and rerun QUICK TEST.