Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004ECONOLINE E150, VAN CARGO, 4.6 WREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 19 (CHARGING SYSTEM - GENERATORS & REGULATORS)SYSTEM TESTSTEST B: WARNING INDICATOR IS ON WITH ENGINE RUNNING, SYSTEM IS NOT CHARGING
2004 Ford Econoline E150, Van Cargo, 4.6 W
Test B: Warning Indicator Is On With Engine Running, System Is Not Charging
2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION Test B: Warning Indicator Is On With Engine Running, System Is Not Charging
WARNING: This page is about a different car, the 2002 Lincoln Navigator, 2002 Lincoln Blackwood, 2002 Ford Pickup, and 2002 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- Measure voltage between ground and generator terminal B+ (Black/Orange wire). See Fig 1. If battery voltage is present, go to next step. If battery voltage is not present, repair circuit between battery and generator. See WIRING DIAGRAMS .
- Disconnect generator 3-pin harness connector. Measure voltage between ground and generator connector terminal "A" (Orange/Light Blue wire). See Fig 2. If battery voltage is present, go to next step. If battery voltage is not present, repair circuit between battery and generator. See WIRING DIAGRAMS .
- Connect generator harness connector. Start engine and let idle. Using a DVOM, backprobe between ground and generator harness connector terminal "I" (Light Green/Red wire). See Fig 2. If battery voltage is present, go to next step. If battery voltage is not present, repair Light Green/Red wire between generator and instrument cluster. See WIRING DIAGRAMS .
- Turn on headlights on. Turn rear window defogger on. Turn blower motor to high speed. Increase engine speed to 2000 RPM. Measure voltage between positive battery terminal and generator terminal B+ (Black/Orange wire). If voltage drop is less than .5 volt, go to next step. If voltage drop is .5 volt or more, repair circuit between battery and generator. See WIRING DIAGRAMS .
- On all models except Lightning, go to next step. On Lightning models, replace generator. See GENERATOR under REMOVAL & INSTALLATION.
- Turn ignition off. Remove generator from vehicle. Measure resistance between voltage regulator "F" terminal screw on back of generator and generator 3-pin connector terminal "A" (component side). See Fig 1 and Fig 3 . If resistance is 5 ohms or less, replace generator. See GENERATOR under REMOVAL & INSTALLATION. If resistance is 5 ohms or more, replace voltage regulator. See VOLTAGE REGULATOR under REMOVAL & INSTALLATION.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.