I had this problem in the past, and only later found that the battery ground wasn't good. Removed black battery cable from the grounding point (opposite end of cable from battery), cleaned the spot where it was attached, and cleaned the cable end, then reattached it. Worked fine then. Only one possibility though.
The alternator or a poor wiring connection.
If the battery and alternator are good and the charging system is not working, then you either have loose or corroded wiring or the drive belt is slipping.
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.
bad wiring harnest
If your 1994 Ford Probe's alternator checks out good but the battery isn't charging, consider inspecting the battery connections for corrosion or looseness, as poor connections can prevent proper charging. Additionally, check the wiring and fuses related to the charging system for any damage or breaks. Lastly, a faulty battery can also be the culprit, so testing the battery's health is essential.
This could also be alternator problems as in a bad diode in the alternator.
Yes, because a bad coil will not allow the engine to run. But if the engine is running then the coil has nothing to do with the alternator charging the battery.
If a 2003 Dodge Stratus has a new battery and alternator but is still not charging, the issue may lie in the electrical connections, such as corroded or loose battery cables or ground connections. Additionally, there could be a fault in the vehicle's wiring, fuses, or the voltage regulator, which controls the alternator's output. Diagnostic testing may be necessary to pinpoint the exact cause of the charging problem.
Check the Battery and cables and if it's not that it could be the alternator.
When the light is on it means the system is not charging. This is almost always the alternator. Can also be a loose alternator belt, loose wire, or break in the wiring. Drive the car to an Auto Parts store and have them check the charging system. You can also check the voltage output of the alternator with a multi-meter. At the battery posts with the engine running it should read between 13.5-15 volts.
An auto battery could be leaking for a couple of reasons. The alternator could be overcharging the battery causing the leakage. Or the battery itself could have a short or other internal problem causing it to leak when charging.
The computer controls the alternator. If the charging system is malfunctioning, that could be the cause of the weak battery.The computer controls the alternator. If the charging system is malfunctioning, that could be the cause of the weak battery.