Recently had an issue with my Alternator where it had a chunk of metal lose inside so I ended up replacing it with a brand new one from AutoZone. Recently, after only a month, I am running into issues with my car having a “Charging System Failure” I took it to AutoZone to test the battery and altern…

AutoZone is in the business of selling parts they are not mechanics you need to have an independent shop look at it.

You don’t say what year your Pontiac is, but some GM vehicles have a battery current sensor on the negative battery cable. [2008 Grand Prix intermittent "charging system failure" and "battery saver mode" on DIC. The dealer I bought the car from] When these fail, the charging system can act erratic…

It’s a 2007 Pontiac Grand Prix GT. I did see this on the negative cable. Is there any way to test this sensor? Or do you kind of just replace and hope for the best?

You replaced everything else. Why stop now? Replace it. Tester

I’ll give this a try and reach back out with results.

There could be a problem with the current sensor possibly. I don’t know how the charging circuit is using that sensor in the charging circuit so I can’t help you much with that. You should be able to check the resistance of the sensor and get some sort of reading, but I don’t know what a normal read…

You might check the junction terminal connection. GM vehicles generally have a main fuse or junction terminal connection and all electrical power except the starter motor windings go through that junction. With age and being located near, or under, the battery the connections get corroded and can c…

You removed alternator. So you flexed all wires. The charging cable and the sense wire cable that controls alternator. They were untouched before you changed alternator. Could be as simple as broken wire inside connector. Happened to me. Had to replace plug.

The charge voltage when driving is too low. Either something in circuit is loading the alternator, or alternator or its charging circuity is faulty. Suggest to start with this diy’er charging/battery test: before first start of the day battery should measure about 12.6 volts; then immediately af…

Charging System Failure after replacing alternator

Maintenance/Repairs

weekend-warrior July 28, 2022, 11:04pm 7

On a side note, I have had a new alternator fail from autozone a month after I bought it. voltage was all over the places. low to overcharging.

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Charging System Failure after replacing alternator

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