Power Circuits

Turn ignition off. Ensure AFCM 90-pin connector is disconnected. Turn ignition on. Using DVOM, check for battery voltage between chassis ground and AFCM VPWR terminals No. 45 and 60. 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 - F150 article in ELECTRICAL.