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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 92
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Test J: Step 92

92) Check For Shorts to Power  With KOEO, breakout box installed and ECA disconnected, connect a test light between test pin No. 8 (No. 19 on 5.0L MA PFI) and test pin No. 40. Observe test light, perform WIGGLE test on FPM circuit and POWER-to-PUMP circuit. Lightly tap the fuel pump relay to simulate road shock. If light goes on to indicate a fault is found, isolate and repair as necessary. Remove test set-up and rerun QUICK TEST. If no faults are found, fault is intermittent and cannot be duplicated at this time. Clear Continuous Memory Codes and rerun QUICK TEST.