There is a wire from the alternator to the starter motor. On the starter motor end, there is a fusible link that sometimes melts. With the engine off, check the battery volts and check the volts on the big red alternator wire. If they are not the same voltage, the link is open. If the link is open, the battery will not charge
The alternator is probably faulty - you might take it to Auto Zone and have it checked for free.
Check fusable links
The charging system is the alternator which is on and functioning anytime the engine is running. If not, then you have a problem with the alternator.
In all probability the alternator is not working as it should.
The charging system on a 2000 Lincoln LS V8 is primarily located under the hood. The alternator, which is the main component of the charging system, is mounted on the front of the engine, typically on the driver's side. The battery is located in the trunk of the vehicle, which connects to the alternator via wiring.
I can tell you that on a 2000 mercury cougar it is a fuse on the positive cable between the battery and the alternator
I was looking at the 2000 Ford Ranger Owner Guide ( for North America ) and it shows : In the Power Distribution Box ( which is " live ) located in the engine compartment : ( # 14 is a 30 amp mini fuse for the alternator voltage regulator )
The battery light stays on when the alternator is over or under charging.
Defective voltage rgulator? Mounted inside the alternator Remove alternator and have it tested also plausable you may have a poor ground. check the connection by following the neg (-) on your battery to the front radiator support behind your headlight.
If your 2000 Cadillac DTS is not charging despite a new alternator and battery, there may be an issue with the wiring or connections between the alternator and the battery. Check for loose or corroded terminals, damaged wiring, or blown fuses that could interrupt the charging circuit. Additionally, you might want to test the alternator output with a multimeter to ensure it's functioning properly. If the problem persists, consider having the vehicle's electrical system inspected by a professional.
It stops charging the battery and the charging system light comes on. Drive to the nearest auto parts store and they will check the system for free.
Your car should be charging at around 14 volts. I would suspect the voltage regulator is at fault if it is charging too high. You can replace the alternator. If you can find an aftermarket voltage regulator you can replace just that. It is on the back of the alternator.