I have a 2003 Lincoln Navigator, 5.4 V8, 4-wheel drive, 67,000 mi. Recently, the "Check Charging System" alert and a red battery icon appeared on the dash. I had Auto Zone check the battery and alternator. The battery (original) checked good, but the alternator failed. I installed a new (not rebuilt) alternator. After installation, the "Check Charging System" alert is still on. A recheck of the alternator output indicates its performance is good. I also checked the battery water levels, and added a slight amount of water to each cell. What else can cause the alert to activate? I've been told that the alert does not require an error system reset.
Thanks for your help.
Tuesday, December 31st, 2019 AT 6:40 PM