Test C: System Overcharges
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect generator 3-pin harness connector. Measure voltage between positive battery terminal and generator harness connector terminal "A". See Figure. If voltage is less than .5 volt, go to next step. If voltage is .5 volt or more, repair Orange/Light Blue wire between generator and Brown fusible link "C". See WIRING DIAGRAMS .
- Inspect generator and regulator grounds (mounting surfaces and fasteners). Inspect battery ground. If problem exists, repair as necessary. If all grounds are okay, replace voltage regulator.