charging system not working alternator wiring?

2005 LINCOLN NAVIGATOR
90,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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PACER MILLER
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My check charging light came on just before vehicle shut off. Replaced battery, replaced alternator, checked fuses and inline fuses connections. still will not charge battery.
Nov 12, 2017 at 1:48 PM
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KASEKENNY
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There are a couple things that can cause this. We need to start with making sure we load checked the alternator using this guide.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

If this is how you tested it and it passes then we need to find out what the voltage is on the two wires going to the PCM.

https://www.2carpros.com/articles/how-to-check-wiring

Basically if the alternator is being commanded to full charge then we just have an indicator issue.

This is a bus message from the PCM to the cluster. Here is a guide that will help with this system:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

I am attaching the info below from the manual on the wiring diagram and let us know what you find with the voltage and we can go from there.

Thanks
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Sep 13, 2021 at 4:11 PM