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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test J - Fuel Pump Circuit >> Test J: Step 9
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Test J: Step 9

9) Check For Short to Power  With key off, disconnect ECA and fuel pump relay. Install breakout box and set DVOM on 20-volt scale. Turn key on. Measure voltage between test pin No. 22 and battery negative terminal. If voltage is less than one volt, go to next step. If not, repair short circuit. Reconnect ECA and attempt to start vehicle. If vehicle fails to start, replace ECA. Rerun QUICK TEST.