Test B: Warning Indicator On With Engine Running, System Not Charging
WARNING: This page is about a different car, the 2004 Lincoln LS and 2003 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
- Check Generator B+ Output Circuit (Red Wire)
Turn ignition off. Measure the voltage between the generator B+ output terminal (Red wire) and ground. Is the voltage within 0.5 volt of battery voltage? If yes, go to next step. If no, repair the circuit. Test the system for normal operation. - Check "I" Circuit (Gray/Red Wire) For An Open
Start the engine. With the engine running, measure the voltage between the generator connector terminal No. 2 (Gray/Red wire) and ground. See Fig 1 . Is the voltage approximately 1 - 8 volts? If yes, go to next step. If no, repair the circuit. Test the system for normal operation. - Check For Voltage Drop In B+ Output Circuit (Red Wire)
With the engine running, turn on the headlamps and the rear defroster and position the blower motor to the HIGH position. With the engine at 2,000 RPM, measure the voltage drop between the generator B+ circuit (Red wire) and the positive battery terminal. Is the voltage drop less than 0.5 volt? If yes, install a new generator. See GENERATOR under REMOVAL & INSTALLATION. If no, repair the high resistance in the B+ circuit (Red wire). Test the system for normal operation.