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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test J - Fuel Pump Circuit >> Test J: Step 24

Test J: Step 24

24) Check Fuel Pump Primary Circuit For Short to Ground  Turn key off and wait 10 seconds. Install breakout box and disconnect ECA. Disconnect fuel pump relay and set DVOM on 200-k/ohm scale. Measure resistance between test pins No. 22 and 40 at the breakout box. If resistance is greater than 10 k/ohms, remove test set-up. Replace ECA, reconnect components and rerun QUICK TEST. If resistance is less than 10 k/ohms, repair short circuit and reconnect components. Repeat QUICK TEST.