The alternator and battery both work but battery is still not being charged.
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This past week my wife's car battery light came on while I was driving it. After parking it soon afterwards, it would not start. I was able to boost it and get it home. The next day I went and had both the battery and alternator tested at a local AutoZone. They both passed the test. It appeared as though the negative terminal clip was loose and I thought perhaps it was just a bad terminal connection. I repaired both terminal clips for the positive and negative and charged the battery manually at home before starting it again. It showed no battery light initially, but after a short test drive it came back on. I managed to drive it a few places before my battery depleted once again and now I'm back to square one. I had the battery and terminal tested at another business just to make sure, and they both passed the test. Just to be safe, I replaced the battery with a back-up and got the same result. I haven't been able to find a fuse allocated as a relay for the alternator in the car manual, so I don't know if there is one or not. I'm not sure what the problem could be. Any insight into this problem would be greatly appreciated.
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FIRST > With the battery fully charged and engine running, test alternator output voltage at the battery terminals using a volt meter set to 20V-DC .. (Nothing fancy, just a simple volt meter) .. Post the test results.
You can purchase a descent, easy to use, digital volt ohm meter (DVOM) for the 'DIYer' most anywhere that sells em for under $10.00 .. Every automobile owner should have one! .. After the required test results are posted, then we can provide information to help you FIX this minor inconvenience!
It's labeled as "IG1 ACG", and it is a 10 amp fuse. Any idea what that stands for or what it does? I've read it may have something to do with the main relay.
You can purchase a descent, easy to use, digital volt ohm meter (DVOM) for the 'DIYer' most anywhere that sells em for under $10.00 .. Every automobile owner should have one! .. After the required test results are posted, then we can provide information to help you FIX this minor inconvenience!