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Home >> Ford >> 2004 >> Expedition 4.6 W, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Engine Controls - System & Component Testing - Bi-Fuel - Gasoline/LPG) >> Computerized Engine Controls >> Alternative Fuel Control Module >> Power Circuits

Power Circuits

WARNING: This page is about a different car, the 2003 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition off. Ensure compuvalve 64-pin connector is disconnected. Turn ignition on. Using DVOM, check for battery voltage between chassis ground and compuvalve VPWR terminals No. 2, 11 and 13. See Figure. If battery voltage is not present, power is not being supplied from bi-fuel relay module. Repair open in affected circuit or bi-fuel relay module as necessary. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.