autto.net

My battery stop charging so I replaced the alternator. That didn't fix the problem. The car runs but doesn't charge. Or is that my battery is dieing? Also I'm not sure if I put the ground wire back into right location, I took it off a few days prior putting a new one in. Maybe it the wire gone all bad.
The car is an 02 chevrolet cavalier, with the dohc,

The problem is you drive a UNION MADE pos

The battery might be bad internally, making it not accept a charge or not hold a charge. And as long as the ground wire is bolted somewhere on the body that is close (within a foot) of the battery, It will be fine.

The battery may no longer be able to hold a charge, even though the alternator is putting one out?
The only way to tell is check the alternator output.
The best way is to use a voltmeter, ($3 at Harbor Freight).
The battery should read 12.5 with engine off.
It should drop to 10 while cranking.
Once started, then should go over 13.5 when reved up.
If you don't want to get a volt meter, you can turn on the headlights, and see if they brighten slightly when reved.
As for grounds, there needs to be one from the battery - to the chassis, and one from the chassis to the engine (because the engine is mounted in rubber). It also does not hurt to have a small ground wire from the alternator to the chassis or engine, but not all cars do.
Also make sure the warning light is not burned out, the belt is tight, there is no corrosion at the terminals, and that the main inline fuse or fusible link to the alternator is not bad. Check continuity with test light or ohmmeter.

Your battery is most likely bad.